Official Rythmik Audio Subwoofer thread - Page 559 - AVS | Home Theater Discussions And Reviews

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Subwoofers, Bass, and Transducers

Bruce Watson's Avatar Bruce Watson
09:36 AM Liked: 11
post #16741 of 17444
10-03-2014 | Posts: 192
Joined: Jun 2009
Quote:
Originally Posted by Bruce Watson View Post
FVX12?
Looking like... probably not. But maybe. Seems to be kinda sorta in limbo.

The 12 is the one I need. Can't get WAF on the 15, one is just too big, and I'm talking about a pair. And a pair of 15s would be serious overkill for my mid-sized sealed room. So I'll remain hopeful for the FVX12. Time will tell.
JT78681's Avatar JT78681
09:39 AM Liked: 219
post #16742 of 17444
10-03-2014 | Posts: 1,519
Joined: Apr 2012
Never such thing as overkill Bruce. You can always turn your subs down.
JT78681's Avatar JT78681
09:41 AM Liked: 219
post #16743 of 17444
10-03-2014 | Posts: 1,519
Joined: Apr 2012
Quote:
Originally Posted by Bruce Watson View Post
Looking like... probably not. But maybe. Seems to be kinda sorta in limbo.

The 12 is the one I need. Can't get WAF on the 15, one is just too big, and I'm talking about a pair. And a pair of 15s would be serious overkill for my mid-sized sealed room. So I'll remain hopeful for the FVX12. Time will tell.
Also, for some reason I have doubt that Rythmik will come out with another ported 12 in their line-up.
ah_1014's Avatar ah_1014
12:57 PM Liked: 13
post #16744 of 17444
10-03-2014 | Posts: 117
Joined: Aug 2006
Hey guys,

I was initially planning to purchase two FV15HP early next year, but I think I might purchase one now in the next month or two and then the other around March of 2015.

I have a few questions regarding purchasing these subs.

From the moment you hit the order button if the item is not back ordered, how long does it take for the sub to be ready and shipped out?

Also, how long does the purchase of multiple items discount last? Will I need to call in when purchasing the second sub or will the discount be applied at checkout?
JustABrah's Avatar JustABrah
01:31 PM Liked: 72
post #16745 of 17444
10-03-2014 | Posts: 355
Joined: Nov 2013
Quote:
Originally Posted by ah_1014 View Post
Hey guys,

I was initially planning to purchase two FV15HP early next year, but I think I might purchase one now in the next month or two and then the other around March of 2015.

I have a few questions regarding purchasing these subs.

From the moment you hit the order button if the item is not back ordered, how long does it take for the sub to be ready and shipped out?

Also, how long does the purchase of multiple items discount last? Will I need to call in when purchasing the second sub or will the discount be applied at checkout?
I believe the discount is good for life, so when you buy your next one you'll get it discounted, I'm not sure how it works though? Like how they know your a repeat buyer?. I think it took a few days before the sub was shipped out, pretty fast. If I remember right it took about a week to a week and a half from buying the sub to having it shipped and landed in Canada.
tvuong's Avatar tvuong
01:43 PM Liked: 151
post #16746 of 17444
10-03-2014 | Posts: 2,054
Joined: Dec 2000
You get a 10% discount for your next purchase. The advantage of buy 2 subs at the same time is you will get 10% off BOTH subs.
JT78681's Avatar JT78681
01:43 PM Liked: 219
post #16747 of 17444
10-03-2014 | Posts: 1,519
Joined: Apr 2012
The discount is for life and Rythmik will have it on file that you are an existing customer.
JT78681's Avatar JT78681
01:46 PM Liked: 219
post #16748 of 17444
10-03-2014 | Posts: 1,519
Joined: Apr 2012
I purchased my subs at two different times and received both same day.
ah_1014's Avatar ah_1014
02:02 PM Liked: 13
post #16749 of 17444
10-03-2014 | Posts: 117
Joined: Aug 2006
Quote:
Originally Posted by tvuong View Post
You get a 10% discount for your next purchase. The advantage of buy 2 subs at the same time is you will get 10% off BOTH subs.
I was thinking that as well..

Hmmm, I wonder if I should wait or just buy both at the end of the year lol.. The wait/anticipation is killing me.

I current have 3 12" Velodyne subs and they just don't cut it anymore regarding output and extension. They just can't keep up with my towers at higher volume levels. The subs are pretty flat from 30 - 80hz +/- 2db.

Once I have a 4th subwoofer in the mix i'm certain I can get it completely flat, as long as the Velodyne and the Rythmik's play nicely together. My plan is to have the two FV's at the front and two Velodyne's at the back..
enricoclaudio's Avatar enricoclaudio
02:20 PM Liked: 181
post #16750 of 17444
10-03-2014 | Posts: 1,227
Joined: Aug 2005
Quote:
Originally Posted by ah_1014 View Post
Hey guys,

I was initially planning to purchase two FV15HP early next year, but I think I might purchase one now in the next month or two and then the other around March of 2015.

I have a few questions regarding purchasing these subs.

From the moment you hit the order button if the item is not back ordered, how long does it take for the sub to be ready and shipped out?

Also, how long does the purchase of multiple items discount last? Will I need to call in when purchasing the second sub or will the discount be applied at checkout?
We usually need 2 - 3 days for shipping then 2 - 4 days for delivery with UPS Ground. We ship from Austin, TX so you can check HERE for delivery transit time.

About discounts, if you buy two subwoofers then you get 10% discount in the total before shipping. If you buy one subwoofer you pay full price but if you buy a second subwoofer before 30 days of your first purchase then you get 10% discount in both subwoofers. We will give you a credit in your second subwoofer purchase equivalent to the 10% of your first purchase (shipping not included) + the 10% discount for your second subwoofer purchase. If you buy a second subwoofer after the first 30 days then you get 10% discount only in your second purchase or future purchases. This discount is what we call "returning customer discount" which doesn't expire. Also we do offer a Military discount of 10% for single subwoofer purchase and 15% discount for multiple subwoofers purchase.
ah_1014's Avatar ah_1014
02:28 PM Liked: 13
post #16751 of 17444
10-03-2014 | Posts: 117
Joined: Aug 2006
Thank you all for the information..

Now I'm just playing the waiting game. I may just purchase both at the same time to get that extra discount off both Subs.

I live in Toronto, Canada, so I actually plan to have it shipped to the boarder and then pick it up from there. Going to save my self on duty/brokerage. I think I should only be paying tax on the subs since they're built in the US,correct me if I'm wrong.

I may just end up getting them before the end of year, so that will be a Christmas present to myself.

Oh, another question folks, my speakers are black oak, should I stick with oak for the subs or matte? Which one seems to have a better finish?
Bond 007's Avatar Bond 007
03:08 PM Liked: 921
post #16752 of 17444
10-03-2014 | Posts: 12,685
Joined: Jun 2012
Quote:
Originally Posted by enricoclaudio View Post
We usually need 2 - 3 days for shipping then 2 - 4 days for delivery with UPS Ground. We ship from Austin, TX so you can check HERE for delivery transit time.

About discounts, if you buy two subwoofers then you get 10% discount in the total before shipping. If you buy one subwoofer you pay full price but if you buy a second subwoofer before 30 days of your first purchase then you get 10% discount in both subwoofers. We will give you a credit in your second subwoofer purchase equivalent to the 10% of your first purchase (shipping not included) + the 10% discount for your second subwoofer purchase. If you buy a second subwoofer after the first 30 days then you get 10% discount only in your second purchase or future purchases. This discount is what we call "returning customer discount" which doesn't expire. Also we do offer a Military discount of 10% for single subwoofer purchase and 15% discount for multiple subwoofers purchase.
Very respectable that you offer a military discount as well.
BDP24's Avatar BDP24
03:46 PM Liked: 61
post #16753 of 17444
10-03-2014 | Posts: 734
Joined: Jun 2012
Quote:
Originally Posted by ah_1014 View Post
Thank you all for the information..

Now I'm just playing the waiting game. I may just purchase both at the same time to get that extra discount off both Subs.

I live in Toronto, Canada, so I actually plan to have it shipped to the boarder and then pick it up from there. Going to save my self on duty/brokerage. I think I should only be paying tax on the subs since they're built in the US,correct me if I'm wrong.

I may just end up getting them before the end of year, so that will be a Christmas present to myself.

Oh, another question folks, my speakers are black oak, should I stick with oak for the subs or matte? Which one seems to have a better finish?

Do you intend to remain with your current speakers for a while? If so, matching Oak would be nice.
BDP24's Avatar BDP24
03:52 PM Liked: 61
post #16754 of 17444
10-03-2014 | Posts: 734
Joined: Jun 2012
Quote:
Originally Posted by Bond 007 View Post
Very respectable that you offer a military discount as well.

Really great policy! Is that for currently serving, or for all U.S. Veterans?
enricoclaudio's Avatar enricoclaudio
04:20 PM Liked: 181
post #16755 of 17444
10-03-2014 | Posts: 1,227
Joined: Aug 2005
Military discount is for both, currently serving and U.S. Veterans!!!
ah_1014's Avatar ah_1014
10:09 PM Liked: 13
post #16756 of 17444
10-03-2014 | Posts: 117
Joined: Aug 2006
Quote:
Originally Posted by BDP24 View Post
Do you intend to remain with your current speakers for a while? If so, matching Oak would be nice.
I do plan to have these speakers for at least another 5 years or more. If I do upgrade the speakers I plan to aim for are the Legacy Focus SE with the matching center and bookshelves .. Which is currently way out of my price range lol.. But my god do those speakers look sweet!!


I don't think I can justify almost 20K on a speaker system though, unless I can get a good promotion lol..
JustABrah's Avatar JustABrah
08:14 AM Liked: 72
post #16757 of 17444
10-04-2014 | Posts: 355
Joined: Nov 2013
I moved into a new place and my sub sounds great and shakes the room but I no longer feel the bass, that punch to the gut is now missing... am I going to have to add another one or need a more powerful sub now? I have the E15HP....
Bond 007's Avatar Bond 007
08:26 AM Liked: 921
post #16758 of 17444
10-04-2014 | Posts: 12,685
Joined: Jun 2012
Quote:
Originally Posted by JustABrah View Post
I moved into a new place and my sub sounds great and shakes the room but I no longer feel the bass, that punch to the gut is now missing... am I going to have to add another one or need a more powerful sub now? I have the E15HP....
If its a bigger space and you have placed the sub properly then probably yes.
rcohen's Avatar rcohen
02:54 PM Liked: 124
post #16759 of 17444
10-04-2014 | Posts: 1,356
Joined: Feb 2005
Quote:
Originally Posted by ah_1014 View Post
I do plan to have these speakers for at least another 5 years or more. If I do upgrade the speakers I plan to aim for are the Legacy Focus SE with the matching center and bookshelves .. Which is currently way out of my price range lol.. But my god do those speakers look sweet!!


I don't think I can justify almost 20K on a speaker system though, unless I can get a good promotion lol..
I heard Legacy Focus SEs once at a local Legacy demo, and I thought they sounded kind of lifeless. I was pretty surprised. They also had a pair of Aeris speakers, and those sounded spectacular. I've seen people say very good things about the Focus SEs, though, so maybe it was the room.

Definitely compare to other options for yourself, at least.
Rythmik's Avatar Rythmik
10:04 PM Liked: 86
post #16760 of 17444
10-06-2014 | Posts: 1,861
Joined: Aug 2005
RMAF 2014 Room 1107 Salk Sound


One of the selling point of servo based subwoofers is the increased damping of the drivers (3x) so that the servo driver can quickly dissipate the sound energy inside an enclosure and produce a cleaner non-boxy sound. It is a pretty straightforward to do a side-by-side comparison between nonservo version and servo version. That is the reason we come up with the following demo unit and let customers push the cone and feel the increased damping from the servo driver. Since our hand cannot really simulate a 10hz signal, customers just need to push the cone as fast as one can and compare the push-back force from the cone. This year, this unit will be placed in RMAF room 1107. Welcome everyone going to the show to try it out. Servo is not just a buzz word. It is something everyone can "feel" the servo difference.





A full size picture can be found www.rythmikaudio.com/avsforum/servo_comp.jpg
JT78681's Avatar JT78681
02:32 PM Liked: 219
post #16761 of 17444
10-07-2014 | Posts: 1,519
Joined: Apr 2012
If I had both my FV15HP's on the same wall one in the front left corner and one in the back left corner would I get cancellation? The drivers would essentially be facing each other, but about 15 ft away from one another.
tvuong's Avatar tvuong
04:13 PM Liked: 151
post #16762 of 17444
10-07-2014 | Posts: 2,054
Joined: Dec 2000
^^ it might, it might not. not the answer you want to hear, but without REW or graph measurements, it is hard to tell. I know you had bought and returned an usb mic as you were having issue getting REW to work. As much as you want to tweak to get the best out of your subs, you really need to get REW working. I know I can't do it by ears.
rcohen's Avatar rcohen
07:15 PM Liked: 124
post #16763 of 17444
10-07-2014 | Posts: 1,356
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Quote:
Originally Posted by JT78681 View Post
If I had both my FV15HP's on the same wall one in the front left corner and one in the back left corner would I get cancellation? The drivers would essentially be facing each other, but about 15 ft away from one another.
I have found that opposite corners generally works well. You do still need to time align them at the listening position and avoid sitting in a null.
rick240's Avatar rick240
10:09 AM Liked: 51
post #16764 of 17444
10-08-2014 | Posts: 3,551
Joined: Oct 2004
Hi,

In my future 5.2 HT I plan to place my current F12 into a recess in the wall.

What I am wondering about is:

1. reflection absorption
- what sort of insulation (type and thickness) should I put on the bottom, back, top and sides of the recess to prevent reflections

2. cooling
- how much space between the cabinet and recess walls will be needed and what sort of fan(s) and locations would be needed to prevent the amp in the back of the recess from overheating

3. anything else

Thanks for any and all help
BDP24's Avatar BDP24
03:15 PM Liked: 61
post #16765 of 17444
10-08-2014 | Posts: 734
Joined: Jun 2012
Quote:
Originally Posted by rick240 View Post
Hi,

In my future 5.2 HT I plan to place my current F12 into a recess in the wall.

What I am wondering about is:

1. reflection absorption
- what sort of insulation (type and thickness) should I put on the bottom, back, top and sides of the recess to prevent reflections

2. cooling
- how much space between the cabinet and recess walls will be needed and what sort of fan(s) and locations would be needed to prevent the amp in the back of the recess from overheating

3. anything else

Thanks for any and all help

1- At subwoofer frequencies, the wavelengths are too long to be affected by insulation materials (except for those in the ASC subwoofer tube trap, which sits under a subwoofer), and for "reflections" to be need to be dealt with. Room modes are a different story, but since your sub will be locked into a recess, there is only an electronic solution, like the Anti-Mode products.
2- As long as there are a couple of inches between the plate amp and the wall, you shouldn't have a problem AS LONG AS the space above the amp is open, for the heat to rise.
rick240's Avatar rick240
06:01 PM Liked: 51
post #16766 of 17444
10-08-2014 | Posts: 3,551
Joined: Oct 2004
Quote:
Originally Posted by BDP24 View Post
1- At subwoofer frequencies, the wavelengths are too long to be affected by insulation materials (except for those in the ASC subwoofer tube trap, which sits under a subwoofer), and for "reflections" to be need to be dealt with. Room modes are a different story, but since your sub will be locked into a recess, there is only an electronic solution, like the Anti-Mode products.
The material in the ASC trap (or other traps) - if it works placed under a sub, why wouldn't it similarly work if placed to its sides, back and top (leaving only the forward direction un-trapped)? Are you saying that it is not worthwhile?

I plan to have 2 subs, the other will have marginally more placement freedom, but should help in generally balancing bass across the room.

I suspect I will have a pre/pro with XT32 to be able to deal with two subs and room modes.

Quote:
2- As long as there are a couple of inches between the plate amp and the wall, you shouldn't have a problem AS LONG AS the space above the amp is open, for the heat to rise.
But that's it, the space above is also closed - only the forward direction is open. So I expect that I will need a couple of inches all the way around and probably some fans at the up high to push air forward.
BDP24's Avatar BDP24
06:46 PM Liked: 61
post #16767 of 17444
10-08-2014 | Posts: 734
Joined: Jun 2012
Quote:
Originally Posted by rick240 View Post
The material in the ASC trap (or other traps) - if it works placed under a sub, why wouldn't it similarly work if placed to its sides, back and top (leaving only the forward direction un-trapped)? Are you saying that it is not worthwhile?

I plan to have 2 subs, the other will have marginally more placement freedom, but should help in generally balancing bass across the room.

I suspect I will have a pre/pro with XT32 to be able to deal with two subs and room modes.



But that's it, the space above is also closed - only the forward direction is open. So I expect that I will need a couple of inches all the way around and probably some fans at the up high to push air forward.
The acoustic benefit from ASC tube traps is because the traps allow the long-wavelength sound pressure in, turning it into heat inside the contained cylinder. Fiberglass just on the walls will not do that. though it will kill higher-frequency reflections and may damp the walls a little. It will do nothing, however about room modes, standing waves, etc. Those are room-dimension related (and now cubicle recess-related), which are, as I said, unaffected by flat-sheet acoustical material. You can go to the ASC website and read the technical information for a more detailed explanation.
DonH50's Avatar DonH50
08:02 PM Liked: 326
post #16768 of 17444
10-08-2014 | Posts: 6,494
Joined: Feb 2010
@rick240 : If you are building the recessed area, can you leave a couple of inches below and maybe 6" above? You could install a spacer above the amp with a couple of small fans mounted on it to provide airflow. The spacer could be metal or wood painted or stained to taste.
rick240's Avatar rick240
09:48 PM Liked: 51
post #16769 of 17444
10-08-2014 | Posts: 3,551
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Quote:
Originally Posted by DonH50 View Post
@rick240 : If you are building the recessed area, can you leave a couple of inches below and maybe 6" above? You could install a spacer above the amp with a couple of small fans mounted on it to provide airflow. The spacer could be metal or wood painted or stained to taste.
I figured the amp would likely need more than just natural airflow - and frankly that is what I was coming here for confirmation.

But just wondering how much airflow. Rather than 6" above I was hoping a much smaller space would be adequate. There are plenty of 40mm square fans at the Cooler Guys - 2 or 3 (4 if needed) should provide sufficient airflow out towards the front and pull the hot air from the amp..

So I guess the technical question becomes in an enclosed recessed area, how many CFM of airflow would a Rythmik amp need to be happy?

Then one would have to design baffles to ensure the air flowed in at the bottom and ran past the amp on its path out at the front/top.

Does that make sense? Is it the right approach?
jon_vogel's Avatar jon_vogel
04:53 AM Liked: 10
post #16770 of 17444
10-09-2014 | Posts: 48
Joined: Jul 2001
Hey Rythmik experts - I just received and installed an FV15HP but I'm wondering if I should have gone with two sealed F15HP subs instead.

My basement room is 3500 cuft open to hallway & stairs so I'm concerned with getting enough SPL. But I listen to music 50% of the time and don't like muddy bass.

At first I tried two ports, 20 hz extension, high damping, rumble filter on. This cause my REW spectrogram to extend out past 1 sec in the 20-30hz region. BTW, the room is treated with seven bass traps from GIK (4 corner tri's and 3 monster traps).

I saw Brian posted somewhere if you want the FV to sound like a sealed sub you should use 1port 14hz extension, high damping, no rumble filter. I tried that and it worked well, keeping the spectrogram below 400ms peaks.

However, this setup is only recommended for "moderate" SPL. If that's the case, why not just use a sealed sub like the F15HP? Or is there some other advantage to a ported sub even if your SPL is reduced?
Tags: Rythmik , Rythmik Audio , Rythmik Audio F12 Direct Servo Subwoofer , Rythmik Audio F15 Subwoofer

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