KEF LS50 Owners - Page 103 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 388Likes
Reply
 
Thread Tools
post #3061 of 3188 Old 07-03-2019, 01:45 PM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,241
Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 3331 Post(s)
Liked: 2796
Quote:
Originally Posted by aarons915 View Post
Your Denon measures ruler flat so the only way an upgrade is going to make sense is if you're clipping. I think you said you only listen around 85db max volume at your listening position correct? If so, that is only going to take 1-2 watts of power to achieve so I don't think it's worth it.
I don't necessarily need more volume and I'm Nowhere near clipping. I just keep reading how better amplification bring out the detail and dynamics in the LS50's that you can't achieve with a mid level AVR. If a $1000 amp/integrated can improve sound quality I'm on board, but if it would simply give me more SPL and be a marginal improvement, I'll save my money.

Kef LS50,Q200C, Q100, SVS SB-2000, Denon AVR-X3400H, NAD 216, Panasonic 50" Plasma, Xbox One.
Bedroom: JBL Loft 50 , Loft 20, Bic F-12, Denon AVR-S710W, PS3, 32" Insigna LED.
pase22 is online now  
Sponsored Links
Advertisement
 
post #3062 of 3188 Old 07-03-2019, 02:10 PM
AVS Forum Special Member
 
aarons915's Avatar
 
Join Date: Oct 2012
Location: Cincinnati, OH
Posts: 1,313
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 876 Post(s)
Liked: 690
Quote:
Originally Posted by pase22 View Post
I don't necessarily need more volume and I'm Nowhere near clipping. I just keep reading how better amplification bring out the detail and dynamics in the LS50's that you can't achieve with a mid level AVR. If a $1000 amp/integrated can improve sound quality I'm on board, but if it would simply give me more SPL and be a marginal improvement, I'll save my money.
People claim all kinds of things around here but I'm not aware of a single double blind study that shows a difference as long as the amps measure flat(all of them do these days) and are used in their normal operating range. The biggest things I've done for sound quality improvement of my LS50's is getting the sub integration correct and taming the highs a bit. I think the more bass you can remove from the LS50's the better they sound and if the highs are fatiguing, you can work on that but your Audyssey might already have done that.
aarons915 is online now  
post #3063 of 3188 Old 07-03-2019, 02:32 PM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,241
Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 3331 Post(s)
Liked: 2796
Quote:
Originally Posted by aarons915 View Post
People claim all kinds of things around here but I'm not aware of a single double blind study that shows a difference as long as the amps measure flat(all of them do these days) and are used in their normal operating range. The biggest things I've done for sound quality improvement of my LS50's is getting the sub integration correct and taming the highs a bit. I think the more bass you can remove from the LS50's the better they sound and if the highs are fatiguing, you can work on that but your Audyssey might already have done that.
They're starting to open up now and almost have the center image I had with the Q100's. They're definitely smoother and bring out the details more. Imaging is also improved. No issues with bass on my end.
Lp85253 likes this.

Kef LS50,Q200C, Q100, SVS SB-2000, Denon AVR-X3400H, NAD 216, Panasonic 50" Plasma, Xbox One.
Bedroom: JBL Loft 50 , Loft 20, Bic F-12, Denon AVR-S710W, PS3, 32" Insigna LED.
pase22 is online now  
Sponsored Links
Advertisement
 
post #3064 of 3188 Old 07-03-2019, 03:08 PM
AVS Forum Special Member
 
KenM10759's Avatar
 
Join Date: Nov 2015
Location: Central MA USA
Posts: 5,701
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 3433 Post(s)
Liked: 1915
Quote:
Originally Posted by pase22 View Post

They're starting to open up now and almost have the center image I had with the Q100's. They're definitely smoother and bring out the details more. Imaging is also improved. No issue with bass on my end.
What you might try is to find some music that doesn't have any really deep bass, then put your Denon in its "direct" mode. That would exclude any digital processing and give you a sample of a technically different source.
EDJK likes this.

KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red. Guest room: Hafler 300 L-R, KEF Reference Model 100 center, KEF iQ10 surrounds, modded M&K V-90 sub, Bluesound Vault 2.

Last edited by KenM10759; 07-03-2019 at 07:18 PM.
KenM10759 is offline  
post #3065 of 3188 Old 07-03-2019, 03:50 PM
Member
 
ChristopherP's Avatar
 
Join Date: Mar 2007
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Liked: 19
Quote:
Originally Posted by Turbohippo View Post
Ha! Awesome. So not worth the money to upgrade to a true center or just feel it sounds better with the identical speaker?

Sent from my BBF100-2 using Tapatalk
Money not an issue. For my space 14.5x19.5x8-9 feet the volume and room mean that for an 11.2 channel setup I needed to keep the size of everything under strict control. When I started this journey in 2016, my room was a bit smaller. I went looking for an LS3/5 BBC Monitor as I have had great luck with that size 2 way design. My favorites I still have, the Kef 102Ref bookshelf. They are doing rear surround duty in the current setup. BBC monitors with subs have always sounded great to me and been attainable without stupid ‘go buy a boat’ money. I found the LS50 compared it directly with the Kef TOTL R series 2 way design, (I can’t remember the numbers, sorry) and the TOTL Tower. I find the LS50 to be my favorite on all types of music. I had them demo’d on ridiculously good electronics, both tube and solid state. I knew that they would respond well to upgrades, and the Kef house sound for the BBC monitor had held up.

This established the Timbre of the system overall. Once that’s in the bag, it just a matter of collecting the identical speakers and getting sufficient power to drive them all. The Yamaha AVR (R3060) does a good job driving the center and surrounding speakers. I added a vintage Yamaha M4, 120 watts of old school power fully gone through, recapped and reposted on the back. It is a very very good amp.
The combination works a treat. So, front L/C/R, front Presence L/R, and L/R Surrounds are all LS50s. The rear Presence speakers are 20 year old M&K dipoles for the old 5 channel system. They work well in that role, since all of the major sound is coming from the fronts and surrounds.

Subs are not optional, Subs are a requirement. Mine are okay and serve well, wish I had Rel, but the Def Techs will have to do.

Hope that answers the question. Enjoy your system.

Cheers, Chris

Best, Chris
ChristopherP is offline  
post #3066 of 3188 Old 07-03-2019, 06:25 PM
Member
 
Join Date: Feb 2019
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Liked: 8
Quote:
Originally Posted by ChristopherP View Post
Money not an issue. For my space 14.5x19.5x8-9 feet the volume and room mean that for an 11.2 channel setup I needed to keep the size of everything under strict control. When I started this journey in 2016, my room was a bit smaller. I went looking for an LS3/5 BBC Monitor as I have had great luck with that size 2 way design. My favorites I still have, the Kef 102Ref bookshelf. They are doing rear surround duty in the current setup. BBC monitors with subs have always sounded great to me and been attainable without stupid ‘go buy a boat’ money. I found the LS50 compared it directly with the Kef TOTL R series 2 way design, (I can’t remember the numbers, sorry) and the TOTL Tower. I find the LS50 to be my favorite on all types of music. I had them demo’d on ridiculously good electronics, both tube and solid state. I knew that they would respond well to upgrades, and the Kef house sound for the BBC monitor had held up.



This established the Timbre of the system overall. Once that’s in the bag, it just a matter of collecting the identical speakers and getting sufficient power to drive them all. The Yamaha AVR (R3060) does a good job driving the center and surrounding speakers. I added a vintage Yamaha M4, 120 watts of old school power fully gone through, recapped and reposted on the back. It is a very very good amp.

The combination works a treat. So, front L/C/R, front Presence L/R, and L/R Surrounds are all LS50s. The rear Presence speakers are 20 year old M&K dipoles for the old 5 channel system. They work well in that role, since all of the major sound is coming from the fronts and surrounds.



Subs are not optional, Subs are a requirement. Mine are okay and serve well, wish I had Rel, but the Def Techs will have to do.



Hope that answers the question. Enjoy your system.



Cheers, Chris
Thanks Chris. I'm leaning towards the LS50 center but more for bugetary reasons. I have the white with blue drivers up front. I may get a standard black, copper and hide it slightly below the front placements, behind some mesh for aethetics.

Looking forward, and getting close, to uploading some pix of my project.

Sent from my BBF100-2 using Tapatalk
Turbohippo is offline  
post #3067 of 3188 Old 07-03-2019, 08:46 PM
AVS Forum Special Member
 
Join Date: Dec 2006
Location: Montecito, CA
Posts: 1,629
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 739 Post(s)
Liked: 293
Today I replaced a NAD C328 50-watt class D integrated amp I had been using to drive a pair of LS50s with a NAD M22 300-watt class D amp sourced by balanced analog from an Oppo 205. The difference in sound is not subtle, in fact it is quite similar to that when the LS50s are driven by an Ayre KX-5 Twenty preamp and VX-5 Twenty amp, i.e., superb.

db
KenM10759 likes this.
dbphd is offline  
post #3068 of 3188 Old 07-04-2019, 10:28 AM
Member
 
ChristopherP's Avatar
 
Join Date: Mar 2007
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Liked: 19
Quote:
Originally Posted by dbphd View Post
Today I replaced a NAD C328 50-watt class D integrated amp I had been using to drive a pair of LS50s with a NAD M22 300-watt class D amp sourced by balanced analog from an Oppo 205. The difference in sound is not subtle, in fact it is quite similar to that when the LS50s are driven by an Ayre KX-5 Twenty preamp and VX-5 Twenty amp, i.e., superb.

db
Wow db, that sounds like really great progress. I know they respond to good power, sounds like that Oppo 205 front end is the bomb. Thanks for sharing.
Chris

Best, Chris
ChristopherP is offline  
post #3069 of 3188 Old 07-04-2019, 06:23 PM
Member
 
Join Date: Feb 2019
Posts: 55
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Liked: 8
Quote:
Originally Posted by Turbohippo View Post
Thanks Chris. I'm leaning towards the LS50 center but more for bugetary reasons. I have the white with blue drivers up front. I may get a standard black, copper and hide it slightly below the front placements, behind some mesh for aethetics.

Looking forward, and getting close, to uploading some pix of my project.

Sent from my BBF100-2 using Tapatalk
I dont suppose there are any Socal residents that want to go halves on a pair of LS50's White/Blue from A4L. They have'em for $900.

Sent from my BBF100-2 using Tapatalk
Turbohippo is offline  
post #3070 of 3188 Old 07-08-2019, 03:57 PM
Newbie
 
Join Date: Mar 2019
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 0
Quote:
Originally Posted by pase22 View Post
Cuurrent setup:

Current setup:

Denon AVR-X3400H
Kef LS50, Q200C, Q100 & SVS SB-2000.

Love the LS50's especially for 2 channel, but feel I'm not exploring their full potential. I've been considering a Marantz MM-7025, but wondering if it would make a noticeable difference over the Denon. I know there are better and more expensive options, but get can the Marantz for $800(CDN). I can get the Marantz PM8005 Integrated for just under 1k (CDN) as well.

Thoughts?

I definitely recommend going ahead and getting a good integrated amp for 2 channel listening versus driving them solely with the Denon AVR.

I tried using a Denon x4500h to power a new pair of LS50s and was very disappointed in the sound coming from the smaller KEF LSX, which sounded so much better to my ears. The former sounded like listening to music through a fog missing out on that classic KEF sound - it just wasn't nearly as dynamic and crystal clear.

The audio shop let me exchange the LS50s for the wireless version and that was a quick solution to vastly improving the sound but as others pointed out using those in a home theater setup also has inherent trade-offs though works pretty well for me most of the time.

Last edited by mfgillia; 07-08-2019 at 10:38 PM.
mfgillia is offline  
post #3071 of 3188 Old 07-08-2019, 06:34 PM
AVS Forum Special Member
 
KenM10759's Avatar
 
Join Date: Nov 2015
Location: Central MA USA
Posts: 5,701
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 3433 Post(s)
Liked: 1915
Quote:
Originally Posted by mfgillia View Post
I definitely recommend going ahead and getting a good integrated amp for 2 channel listening versus driving them solely with the Denon AVR.

I tried using a Denon x4500h to power a new pair of LS50s and was very disappointed in the sound coming from the smaller KEF LSX, which sounded so much better to my ears. The former sounded like listening to music through a fog missing out on that classic KEF sound - it just wasn't nearly as dynamic and crystal clear.

The audio shop let me exchange the LS50s for the wireless version and that was a quick solution to vastly improving the sound but as others pointed out using those in a home theater setup also has inherent tradeoffs though works pretty well for me most of the time.
We are having an issue lately with the forum.

When you post from some mobile devices (maybe just Android?), the current version of the forum software has a bug that renders every letter "S" as a code. It even corrupts any text you've quoted, even it that one was OK.

Lower case we see: s
Upper case we see: S

Strangely enough, they all look fine on those same devices. I've stopped replying with my phone, unless there's no "S" in it. Rare. You can edit them for a while, but impossible to do with those devices.
Lp85253 likes this.

KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red. Guest room: Hafler 300 L-R, KEF Reference Model 100 center, KEF iQ10 surrounds, modded M&K V-90 sub, Bluesound Vault 2.
KenM10759 is offline  
post #3072 of 3188 Old 07-08-2019, 10:40 PM
Newbie
 
Join Date: Mar 2019
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 0
Quote:
Originally Posted by KenM10759 View Post
We are having an issue lately with the forum.

When you post from some mobile devices (maybe just Android?), the current version of the forum software has a bug that renders every letter "S" as a code. It even corrupts any text you've quoted, even it that one was OK.

Lower case we see: s
Upper case we see: S

Strangely enough, they all look fine on those same devices. I've stopped replying with my phone, unless there's no "S" in it. Rare. You can edit them for a while, but impossible to do with those devices.
Thanks for the heads up. I had no idea there was any issue just looking at it from my cellphone (OnePlus 7 Pro Android). Very strange...
mfgillia is offline  
post #3073 of 3188 Old 07-13-2019, 10:06 AM
Member
 
EB1000's Avatar
 
Join Date: May 2012
Posts: 98
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 102 Post(s)
Liked: 19
Can they handle a high power AV receiver like Yamaha A2070?

Hi

I was impressed with all the reviews. Can these speakers be used as fronts in an HT setup connected to Yamaha RX-A2070 rated at 155W? I noticed the recommended amp is 20 to 100W. This is usually not a problem, but one detail caught my attention in their specs was the maximum output limited to 106db. Such volume level is below THX standard listening levels in HT setup (107db).

Do you recommend these speakers for mixed HT and music used at high levels (I listen to rock, classic pop, jazz, classical and even rap)? I'm afraid my Yamaha A2070 will blow them away (of course, they will be cut to 80Hz, since I have a pair of SVS SB2000 to handle the lows)

Thanks
EB1000 is offline  
post #3074 of 3188 Old 07-13-2019, 10:50 AM
AVS Forum Special Member
 
KenM10759's Avatar
 
Join Date: Nov 2015
Location: Central MA USA
Posts: 5,701
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 3433 Post(s)
Liked: 1915
Quote:
Originally Posted by EB1000 View Post
Hi

I was impressed with all the reviews. Can these speakers be used as fronts in an HT setup connected to Yamaha RX-A2070 rated at 155W? I noticed the recommended amp is 20 to 100W. This is usually not a problem, but one detail caught my attention in their specs was the maximum output limited to 106db. Such volume level is below THX standard listening levels in HT setup (107db).

Do you recommend these speakers for mixed HT and music used at high levels (I listen to rock, classic pop, jazz, classical and even rap)? I'm afraid my Yamaha A2070 will blow them away (of course, they will be cut to 80Hz, since I have a pair of SVS SB2000 to handle the lows)

Thanks
Whoa...that doesn't seem right. As far as I know the THX reference level is 85dB with +20dB of headroom available for transient peaks.

There are a good number of people using LS50 as mains and up to 7.x.x surround systems with similar AVR's. No issue other than they always end up listening more to music.
EB1000 likes this.

KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red. Guest room: Hafler 300 L-R, KEF Reference Model 100 center, KEF iQ10 surrounds, modded M&K V-90 sub, Bluesound Vault 2.
KenM10759 is offline  
post #3075 of 3188 Old 07-13-2019, 12:28 PM
AVS Forum Special Member
 
Join Date: Dec 2006
Location: Montecito, CA
Posts: 1,629
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 739 Post(s)
Liked: 293
Quote:
Originally Posted by EB1000 View Post
(I listen to rock, classic pop, jazz, classical and even rap)
I wonder more about your preferences in music than the AVR. The LS50s do not give you the in-your-face experience some speakers do, and that may be what you want for rock, pop, and rap. You might prefer the B&W rather than KEF sound.

I use 6 LS50s for HT.

db
EB1000 likes this.
dbphd is offline  
post #3076 of 3188 Old 07-13-2019, 12:46 PM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,241
Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 3331 Post(s)
Liked: 2796
Quote:
Originally Posted by dbphd View Post
I wonder more about your preferences in music than the AVR. The LS50s do not give you the in-your-face experience some speakers do, and that may be what you want for rock, pop, and rap. You might prefer the B&W rather than KEF sound.

I use 6 LS50s for HT.

db
I don't know about that? I listen to prog rock, metal, classic rock mostly and I have no complaints about the LS50's for anything I listen to. The Q100's could be a little treble forward on some tracks, but the LS50's are much smoother, at least to my ears.
EB1000 likes this.

Kef LS50,Q200C, Q100, SVS SB-2000, Denon AVR-X3400H, NAD 216, Panasonic 50" Plasma, Xbox One.
Bedroom: JBL Loft 50 , Loft 20, Bic F-12, Denon AVR-S710W, PS3, 32" Insigna LED.
pase22 is online now  
post #3077 of 3188 Old 07-13-2019, 12:56 PM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,241
Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 3331 Post(s)
Liked: 2796
Quote:
Originally Posted by EB1000 View Post
Hi

I was impressed with all the reviews. Can these speakers be used as fronts in an HT setup connected to Yamaha RX-A2070 rated at 155W? I noticed the recommended amp is 20 to 100W. This is usually not a problem, but one detail caught my attention in their specs was the maximum output limited to 106db. Such volume level is below THX standard listening levels in HT setup (107db).

Do you recommend these speakers for mixed HT and music used at high levels (I listen to rock, classic pop, jazz, classical and even rap)? I'm afraid my Yamaha A2070 will blow them away (of course, they will be cut to 80Hz, since I have a pair of SVS SB2000 to handle the lows)

Thanks
As Ken mentioned the THX reference is 85dbs. If your room is on the smaller side, you can definitely use LS50's all around. They will sound fantastic in both 2 channel stereo and multi-channel HT. While the LS50 can get reasonably loud, they're not really designed to be cranked up to 11 constantly. If you like listening at movie theatre levels, you may want to consider more efficient speakers like PSA or Kef R series towers.
EB1000 likes this.

Kef LS50,Q200C, Q100, SVS SB-2000, Denon AVR-X3400H, NAD 216, Panasonic 50" Plasma, Xbox One.
Bedroom: JBL Loft 50 , Loft 20, Bic F-12, Denon AVR-S710W, PS3, 32" Insigna LED.
pase22 is online now  
post #3078 of 3188 Old 07-13-2019, 02:47 PM
Member
 
EB1000's Avatar
 
Join Date: May 2012
Posts: 98
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 102 Post(s)
Liked: 19
Something doesn't add up. They are rated as 8 ohms, and 85db @ 2.83V, which translates into 85db @ 1W approximately. Now, their recommended amp is 20 to 100W. And their max output is at 106db. To get from 85db @ 1W to 106db, the required power would be 2^((106-85)/3) which gives 128W of power, exceeding the max recommended power ratings...

In fact, practical measurements of some reviewers done on the LS50 showed that they can reach 107db w/o clipping and that their actual sensitivity is 84.5db. Repeating the same calculation results in a max power requirement of 181W to reach 107db

So, can they handle 150 to 200W power amp (into 8 ohms) or not? I really don't want to buy them and blow them up after a few months... I'm also considering a future receiver upgrade, maybe to Yamaha RX-A3090, once available with even higher power ratings.

Is anyone here using them with 150W + amp? How are they doing?

Thanks
EB1000 is offline  
post #3079 of 3188 Old 07-13-2019, 02:59 PM
AVS Forum Special Member
 
aarons915's Avatar
 
Join Date: Oct 2012
Location: Cincinnati, OH
Posts: 1,313
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 876 Post(s)
Liked: 690
Quote:
Originally Posted by EB1000 View Post
Something doesn't add up. They are rated as 8 ohms, and 85db @ 2.83V, which translates into 85db @ 1W approximately. Now, their recommended amp is 20 to 100W. And their max output is at 106db. To get from 85db @ 1W to 106db, the required power would be 2^((106-85)/3) which gives 128W of power, exceeding the max recommended power ratings...

In fact, practical measurements of some reviewers done on the LS50 showed that they can reach 107db w/o clipping and that their actual sensitivity is 84.5db. Repeating the same calculation results in a max power requirement of 181W to reach 107db

So, can they handle 150 to 200W power amp (into 8 ohms) or not? I really don't want to buy them and blow them up after a few months... I'm also considering a future receiver upgrade, maybe to Yamaha RX-A3090, once available with even higher power ratings.

Is anyone here using them with 150W + amp? How are they doing?

Thanks
Power requirements are pretty useless because it's only talking about the electrical limit the voice coil can handle I believe, in reality most speakers are excursion limited at some point, this happens way before the max power handling for a small speaker like the LS50. The best way to combat this is to cross them over, preferably higher like 100-120Hz.

Also, how loud are you actually listening? 105 db is extremely loud, if you listen anywhere close to that I don't think these are the speakers for you. They can rock out in the low 90's no problem, still extremely loud but if you're looking to do permanent hearing damage I would pick something with more output.
KenM10759 and pase22 like this.
aarons915 is online now  
post #3080 of 3188 Old 07-14-2019, 01:28 PM
AVS Forum Special Member
 
Join Date: Dec 2006
Location: Montecito, CA
Posts: 1,629
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 739 Post(s)
Liked: 293
Quote:
Originally Posted by aarons915 View Post
Also, how loud are you actually listening? 105 db is extremely loud, if you listen anywhere close to that I don't think these are the speakers for you. They can rock out in the low 90's no problem, still extremely loud but if you're looking to do permanent hearing damage I would pick something with more output.
Like Altec VOTs?
dbphd is offline  
post #3081 of 3188 Old 07-14-2019, 02:55 PM
AVS Forum Special Member
 
KenM10759's Avatar
 
Join Date: Nov 2015
Location: Central MA USA
Posts: 5,701
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 3433 Post(s)
Liked: 1915
Curiously enough, consider that the LS50 Wireless each contain a 200 watt amp for the MF/LF driver and a separate 30 watt amp for the tweeter. What stops them from blowing up the same driver, and why would they have 200 watts of power if it was a complete waste?

KEF specs show the same 106dB max output for both the LS50 Wireless and the LS50 passive.

Quote:
Originally Posted by EB1000 View Post

<snip>
Is anyone here using them with 150W + amp? How are they doing?

Thanks
Every owner of LS50 Wireless is driving their speakers with a 200 watt per channel amplifier.
EB1000 and mfgillia like this.

KEF R500, R200C, R100, R50, SVS SB2000 sub, NAD T758v3 AVR, LG UP875 4K BlueRay, Samsung UN55JU6500F 4K LED TV, KEF M500 headphones, Sony CDP-CE500 CD changer. Office: NAD M10, KEF LS50, KEF Kube 10b, Pro-Ject RPM1 TT w/ Ortofon 2M Red. Guest room: Hafler 300 L-R, KEF Reference Model 100 center, KEF iQ10 surrounds, modded M&K V-90 sub, Bluesound Vault 2.
KenM10759 is offline  
post #3082 of 3188 Old 07-15-2019, 02:39 AM
AVS Forum Special Member
 
Join Date: Dec 2006
Location: Montecito, CA
Posts: 1,629
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 739 Post(s)
Liked: 293
Quote:
Originally Posted by EB1000 View Post
Is anyone here using them with 150W + amp? How are they doing?
I'm using them with a 300 watt Class D amp and I have used them with a 400 watt amp -- 10 watt Class A in the low-bias mode I used. They're doing fine. I'm guessing I rarely draw more than a few watts listening at moderate levels. I don't understand why LS50s sound better with more powerful amps, but they seem to.
EB1000 likes this.

Last edited by dbphd; 07-15-2019 at 02:44 AM.
dbphd is offline  
post #3083 of 3188 Old 07-15-2019, 05:23 AM
Member
 
EB1000's Avatar
 
Join Date: May 2012
Posts: 98
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 102 Post(s)
Liked: 19
Thanks you, but now even more confused :-)

I went to the local store in my town to get the LS50, but the owner insisted that they may be not the best choice for me, and suggested the KEF Q550, which are soled for the exact same price (1100$ a pair).

He told me that using a tinny bookshelves speakers with very limited lower end spectrum of 100Hz is not an ideal HT solution. My room size is 11 feet wide and 18 feet long. I seat about halfway. While my current AV receiver is the Yamaha Rx-A2070, I'm also considering upgrading the front power amp by building a dual mono class-d amp using two 250ASX2 modules (500W into 8 ohms in BTL), sometimes in the future.


The guy at the store told me that the Q550 are a better match for my dual SVS SB2000 that the LS50, which are intended for small room mostly classical music listening. I did listen to the Q550 connected to a Denon X6500H and they sound great. I did not listen to the LS50 yet because they are not in the store's showroom any longer (a new shipment is due next month).

I'm only guessing that he wants to sell me the Q550 because he has them at stock.

What do you guys think?

Thanks
EB1000 is offline  
post #3084 of 3188 Old 07-15-2019, 05:31 AM
Member
 
EB1000's Avatar
 
Join Date: May 2012
Posts: 98
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 102 Post(s)
Liked: 19
BTW, I have a strong feeling that the woofer/mid amp inside the LS50 wireless is the ICEPOWER 125ASX2 module working in BTL mode). But why are the tweeters operated using only a 30W amp? If I use the LS50 nonwireless with a class-d 200W amp, and cross them over at say 80 to 100Hz, as suggested by SVS's tool, can they handle that?
EB1000 is offline  
post #3085 of 3188 Old 07-15-2019, 11:54 AM
AVS Forum Special Member
 
Join Date: Dec 2006
Location: Montecito, CA
Posts: 1,629
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 739 Post(s)
Liked: 293
[QUOTE=EB1000;58297786]The guy at the store told me that the Q550 are a better match for my dual SVS SB2000 that the LS50, which are intended for small room mostly classical music listening. I did listen to the Q550 connected to a Denon X6500H and they sound great. I did not listen to the LS50 yet because they are not in the store's showroom any longer (a new shipment is due next month).

I'm only guessing that he wants to sell me the Q550 because he has them at stock.

What do you guys think?/QUOTE]

That's a good guess. Wait until you've had a chance to hear the LS50s. They are not just for classical music. They do a very fine job of reproducing the double bass of jazz groups and are superb for vocals. There's a reason they're on so many rave lists, including Stereophile's A list.
EB1000 likes this.
dbphd is offline  
post #3086 of 3188 Old 07-15-2019, 01:28 PM
AVS Forum Special Member
 
mlknez's Avatar
 
Join Date: Jul 2005
Location: St. Louis, Missouri
Posts: 2,575
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 489 Post(s)
Liked: 154
LS 50 standard and wireless are both on sale today!
nonstopdoc1 and Mike_WI like this.

Media Room: LG oled65c7, Marantz AV8805, Sherbourn 7/2100, Emotiva A-300, Studer A80, Studer Revox b795, Nakamichi RX-202, HTPC, exaSound e38, Sweetvinyl Sugarcube SC-2, (2) Piega P10, Piega Coax Center, (6) Piega AP 1.2, Hsu VTF-15h mk2
Office: Emotiva mini-x A100, Geek Pulse, (2) KEF LS-50, Goldenear FF 4, PC, NAS 130TB
Bedroom: Panasonic TCP55vt35, Marantz NR1200, Dune 3 Prime, (2) Elac Uni-Fi UB5
mlknez is online now  
post #3087 of 3188 Old 07-27-2019, 12:52 PM
Advanced Member
 
nonstopdoc1's Avatar
 
Join Date: Apr 2005
Location: St. Louis, MO
Posts: 829
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 586 Post(s)
Liked: 148
Saw them on sale few days ago and pulled the trigger. Received these babies few days ago. I upgraded from a pair of B&W 685 hooked to an old Onkyo AVR. I am still playing with different settings but overall I am in awe of SQ

Attached Thumbnails
Click image for larger version

Name:	20190722_100202.jpg
Views:	140
Size:	647.4 KB
ID:	2595350  
KenM10759 likes this.

My Build Thread
HT - Seymour Centerstage XD 2.39:1 133" W| JVC X790R | Denon AVR | QSC DPA 4.2 | ATI AT528NC | Procella P8/P5V | Revel C763L | Rythmik FV15HP x2
Living Room - LG OLED 65" | Yamaha 2060 | Monolith 3x200 | KEF Q900 L/R | Paradigm Millenia 20 CC | Polk Surrounds | Monolith 12" Subs x 2
nonstopdoc1 is online now  
post #3088 of 3188 Old 07-27-2019, 01:27 PM
Member
 
leeshanok's Avatar
 
Join Date: Jul 2007
Location: Atlanta
Posts: 177
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 93 Post(s)
Liked: 45
Quote:
Originally Posted by aarons915 View Post
People claim all kinds of things around here but I'm not aware of a single double blind study that shows a difference as long as the amps measure flat(all of them do these days) and are used in their normal operating range. The biggest things I've done for sound quality improvement of my LS50's is getting the sub integration correct and taming the highs a bit. I think the more bass you can remove from the LS50's the better they sound and if the highs are fatiguing, you can work on that but your Audyssey might already have done that.
So do you have to see rather than hear a difference? Are you claiming that all amps sound the same as long as they measure flat? I don’t need a double blind test to tell me my ears hear a difference. I can only speak from experience, not what folks claim without empirical evidence or referring to charts and measurements. Yes, using charts and measurements has its place and is a good first start to the process of selecting equipment for your setup, but ultimately your ears will decide what you buy and keep, or sell and buy something else.
leeshanok is offline  
post #3089 of 3188 Old 07-27-2019, 02:18 PM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,241
Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 3331 Post(s)
Liked: 2796
Quote:
Originally Posted by EB1000 View Post
I went to the local store in my town to get the LS50, but the owner insisted that they may be not the best choice for me, and suggested the KEF Q550, which are soled for the exact same price (1100$ a pair).

He told me that using a tinny bookshelves speakers with very limited lower end spectrum of 100Hz is not an ideal HT solution. My room size is 11 feet wide and 18 feet long. I seat about halfway. While my current AV receiver is the Yamaha Rx-A2070, I'm also considering upgrading the front power amp by building a dual mono class-d amp using two 250ASX2 modules (500W into 8 ohms in BTL), sometimes in the future.


The guy at the store told me that the Q550 are a better match for my dual SVS SB2000 that the LS50, which are intended for small room mostly classical music listening. I did listen to the Q550 connected to a Denon X6500H and they sound great. I did not listen to the LS50 yet because they are not in the store's showroom any longer (a new shipment is due next month).

I'm only guessing that he wants to sell me the Q550 because he has them at stock.

What do you guys think?

Thanks
I can say from personal experience that the LS50's are a noticeable step up in SQ over the Q's. Having said that, your usage and listening habits have to be taken into consideration. If your main usage is HT/TV and listening at elevated volume levels, Q550/750 would be the better option. If usage is 50/50 music/movies and don't crank it up to 11, LS50's a good option, especially with dual subs.

Kef LS50,Q200C, Q100, SVS SB-2000, Denon AVR-X3400H, NAD 216, Panasonic 50" Plasma, Xbox One.
Bedroom: JBL Loft 50 , Loft 20, Bic F-12, Denon AVR-S710W, PS3, 32" Insigna LED.
pase22 is online now  
post #3090 of 3188 Old 07-27-2019, 02:32 PM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,241
Mentioned: 84 Post(s)
Tagged: 0 Thread(s)
Quoted: 3331 Post(s)
Liked: 2796
Quote:
Originally Posted by leeshanok View Post
So do you have to see rather than hear a difference? Are you claiming that all amps sound the same as long as they measure flat? I don’t need a double blind test to tell me my ears hear a difference. I can only speak from experience, not what folks claim without empirical evidence or referring to charts and measurements. Yes, using charts and measurements has its place and is a good first start to the process of selecting equipment for your setup, but ultimately your ears will decide what you buy and keep, or sell and buy something else.
The Difference in sound has more to do with the pre-amp/processor than actual amp itself.
KenM10759 likes this.

Kef LS50,Q200C, Q100, SVS SB-2000, Denon AVR-X3400H, NAD 216, Panasonic 50" Plasma, Xbox One.
Bedroom: JBL Loft 50 , Loft 20, Bic F-12, Denon AVR-S710W, PS3, 32" Insigna LED.
pase22 is online now  
Sponsored Links
Advertisement
 
Reply Speakers

Tags
Kef Ls50 2 Way Speaker System

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off