KEF Reference One + Parasound A51 or Classe CA-5200? - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 
Thread Tools
post #1 of 8 Old 04-30-2019, 09:30 AM - Thread Starter
Member
 
anilpani's Avatar
 
Join Date: Oct 2004
Location: Northern California
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Liked: 12
KEF Reference One + Parasound A51 or Classe CA-5200?

I want to get some more dynamics from my KEF Reference Ones and am currently feeding them with a Rotel RMB-1075 (120 watts x 5).

Any thoughts on either of these amplifier upgrade options? I wonder which would be a better fit with the speakers. Preamplifier is an Anthem AVM-60.

Thanks!
anilpani is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 04-30-2019, 11:46 AM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,244
Mentioned: 85 Post(s)
Tagged: 0 Thread(s)
Quoted: 3333 Post(s)
Liked: 2798
Quote:
Originally Posted by anilpani View Post
I want to get some more dynamics from my KEF Reference Ones and am currently feeding them with a Rotel RMB-1075 (120 watts x 5).

Any thoughts on either of these amplifier upgrade options? I wonder which would be a better fit with the speakers. Preamplifier is an Anthem AVM-60.

Thanks!
You may want to post in the Kef owners thread.
https://www.avsforum.com/forum/89-sp...hread-583.html

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 offline  
post #3 of 8 Old 04-30-2019, 02:40 PM - Thread Starter
Member
 
anilpani's Avatar
 
Join Date: Oct 2004
Location: Northern California
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Liked: 12
Quote:
Originally Posted by pase22 View Post
You may want to post in the Kef owners thread.
https://www.avsforum.com/forum/89-sp...hread-583.html
Good idea, I'll do that.

Thanks!
anilpani is offline  
Sponsored Links
Advertisement
 
post #4 of 8 Old 04-30-2019, 07:23 PM
AVS Forum Special Member
 
callas01's Avatar
 
Join Date: Feb 2010
Posts: 4,060
Mentioned: 19 Post(s)
Tagged: 1 Thread(s)
Quoted: 1398 Post(s)
Liked: 949
Quote:
Originally Posted by anilpani View Post
I want to get some more dynamics from my KEF Reference Ones and am currently feeding them with a Rotel RMB-1075 (120 watts x 5).

Any thoughts on either of these amplifier upgrade options? I wonder which would be a better fit with the speakers. Preamplifier is an Anthem AVM-60.

Thanks!
Why a 5-ch amp? Is this in a HT setup? I’d probably just power them with Monos or a stereo amp so that the Ref1s get the full power of the power supply vs sharing it across multiple speakers. That would put less strain on the amp. I know those speakers are tough to power!
callas01 is offline  
post #5 of 8 Old 04-30-2019, 08:09 PM
Member
 
Join Date: Sep 2018
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 97 Post(s)
Liked: 42
If you want more dynamics, one easier way is to go 2.2 and have dual subs, that relieves the mid-woofer of playing sub bass. From the soundstage measurements it looks like the mid-woofer has high distortion at 50hz, so if you can cross it over at > 60hz it should improve dynamics and improve sound quality.


Last edited by driedmango; 04-30-2019 at 08:14 PM.
driedmango is offline  
post #6 of 8 Old 04-30-2019, 08:24 PM - Thread Starter
Member
 
anilpani's Avatar
 
Join Date: Oct 2004
Location: Northern California
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 25 Post(s)
Liked: 12
Thanks for the input!

Yeah it is a 5 channel home theater setup with dual Rhythmik L12 sealed subs. The crossover is set at 80Hz after using the AVM-60's ARC room correction. I suppose I could get a nice 2 channel amp for the L&R for music, but the KEF 2c center channel likely needs similar power for home theater purposes. That's why I was leaning towards a 5 channel amp. It would also may be easier to fit a multi-channel amp in the AV rack?

Do you think the 200w x 5 would be insufficient for the fronts?
anilpani is offline  
post #7 of 8 Old 04-30-2019, 10:48 PM
Member
 
Join Date: Sep 2018
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 97 Post(s)
Liked: 42
You're running 5 x Reference 1s? Maybe go 4 x subs if you need more dynamics. The Reference 1s aren't high efficiency so there's diminished gains from just pumping more power. You need more driver surface area. If it's not getting loud enough, best thing I can recommend is just go with the THX spec of 120hz crossover, or add more speakers and run Dolby PLIIx.

You might also have some in-room peaks/nulls causing you to intrepret a lack of dynamics (I'm assuming your listening distance isn't vast here and the actual SPL is decently high). In that case you probably need room correction in the 60-250hz range. I always want to plug Dirac Live, so if you are looking for a new receiver, Arcam's DL units would be something I'd look at, but I would wait until HDMI 2.1 units are out later this year.

Last edited by driedmango; 04-30-2019 at 10:54 PM.
driedmango is offline  
post #8 of 8 Old 05-01-2019, 08:40 AM
AVS Forum Special Member
 
pase22's Avatar
 
Join Date: Dec 2015
Location: Montreal,Canada
Posts: 7,244
Mentioned: 85 Post(s)
Tagged: 0 Thread(s)
Quoted: 3333 Post(s)
Liked: 2798
Quote:
Originally Posted by anilpani View Post
Thanks for the input!

Yeah it is a 5 channel home theater setup with dual Rhythmik L12 sealed subs. The crossover is set at 80Hz after using the AVM-60's ARC room correction. I suppose I could get a nice 2 channel amp for the L&R for music, but the KEF 2c center channel likely needs similar power for home theater purposes. That's why I was leaning towards a 5 channel amp. It would also may be easier to fit a multi-channel amp in the AV rack?

Do you think the 200w x 5 would be insufficient for the fronts?
A well built 5 channel amp like Anthem MCA 525 or the one you're considering will easily drive your base layer. A good as amp isn't just about power, a good amp will help get the most out of your speakers. Also the Reference 1's (as are all Kef bookshelves) aren't super efficient so even a $12000 amp will not help you achieve rock concert levels. What You'll get is good dynamics and great sound out of those fantastic speakers. You have very capable speakers that can play well below 60hz and those rhythmik subs are very articulate and great for music. I'd experiment between a 60-80hz crossover.

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 offline  
Sponsored Links
Advertisement
 
Reply Speakers

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