subwoofer gain issue - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 2Likes
  • 1 Post By Ratman
  • 1 Post By DonH50
 
Thread Tools
post #1 of 7 Old 02-15-2019, 03:59 AM - Thread Starter
Member
 
Join Date: Feb 2018
Location: netherlands/ holland
Posts: 54
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Liked: 13
Exclamation subwoofer gain issue

I have a denon avr x-1400H
and 2 subwoofers: 1 infinty beta sw 12 and 1 tannoy s-sub 15.
When i disconnect 1 subwoofer the otherone gets significantly louder... how do I fix this?
Because i want full power from both subs and not half power from both of them.
I connected them with rca's. The sw 12 to sub 1 and the tannoy to sub 2.

any help would be highly appreciated

Last edited by i-live-4-bass; 02-15-2019 at 04:02 AM. Reason: grammar errors and typo's...
i-live-4-bass is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 02-15-2019, 04:02 AM
AVS Forum Special Member
 
markmon1's Avatar
 
Join Date: Dec 2006
Posts: 5,707
Mentioned: 103 Post(s)
Tagged: 0 Thread(s)
Quoted: 4801 Post(s)
Liked: 3078
Quote:
Originally Posted by i-live-4-bass View Post
i have a denon avr x-1400H
and 2 subwoofer: 1 infinty beta sw 12 and 1 tannoy s-sub 15.
when i disconnect 1 subwoofer the otherone gets significantly louder... how do I fix this?
because i want full power from both subs and not half power from both of them.
i connected them with rca's. the sw 12 to sub 1 and the tannoy to sub 2.

any help would be highly appreciated
You could run the output from the receiver through a cleanbox pro.

Video: JVC RS4500 135" screen in pure black room no light, htpc nvidia 1080ti.
Audio: Anthem mrx720 running 7.1.4, McIntosh MC-303, MC-152, B&W 802d3 LR, B&W HTM1D3 center, B&W 805d3 surround, B&W 702S2 rear, B&W 706s2 x 4 shelf mounted for atmos, 2 sub arrays both infinite baffle: 4x15 fi audio running on behringer ep4000 + 4x12 fi audio running on 2nd ep4000.
markmon1 is offline  
post #3 of 7 Old 02-15-2019, 06:48 AM
AVS Forum Special Member
 
ChromeJob's Avatar
 
Join Date: Apr 2011
Location: N. Carolina
Posts: 4,721
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 2008 Post(s)
Liked: 1068
If the subs are fed from line-level sub PRE OUTS, you’re not getting “half power,” it’s just that the input signal is quieter. Your Denon should allow you to simply up the gain from the AVR. Or increase the gain on the subs.

(after Ratman)
If there's one single volume adjustment on the AVR for the SUB OUTs, it's probably an internal Y-splitter, and meant to operate this way. Just adjust the subwoofers' gain to get volume matching to your liking.

"Sell crazy some place else -- we're all stocked up here."
Are you new to the forum? Please read forum FAQs and stickies. Like posts that help you. RTFM, always.
A: Yamaha RX-V775; Chromecast Audio; iPod Classic, Touch. Bose 401 mains, 301 Series III surrounds, Yamaha NS-C444 center, Hsu VTF-2 Mk4.
V: Panasonic DMP-BDT215, Yamaha DVD-S550. Apple TV 4gen. Chromecast 1gen, Samsung UN40ES6150.

Last edited by ChromeJob; 02-15-2019 at 10:15 AM.
ChromeJob is offline  
Sponsored Links
Advertisement
 
post #4 of 7 Old 02-15-2019, 08:15 AM
AVS Forum Addicted Member
 
Ratman's Avatar
 
Join Date: May 2002
Location: Collingswood, N.J.
Posts: 19,099
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 2242 Post(s)
Liked: 2106
Just for everyone's edification, I believe the Denon has two "sub-outs". They can be volume controlled in setup... but not independently/individually.
I could be incorrect... just took a quick look at the manual.
ChromeJob likes this.



If you can’t explain it simply, you don’t understand it well enough – Albert Einstein
Ratman is online now  
post #5 of 7 Old 02-15-2019, 11:41 AM
AVS Forum Addicted Member
 
DonH50's Avatar
 
Join Date: Feb 2010
Location: Monument CO
Posts: 12,167
Mentioned: 67 Post(s)
Tagged: 0 Thread(s)
Quoted: 3179 Post(s)
Liked: 3179
It's also possible there is some cancellation going in when both are operating that goes away with one... This cancellation may be to better flatten the response by bringing down a peak so is not necessarily bad.
ChromeJob likes this.

"After silence, that which best expresses the inexpressible, is music" - Aldous Huxley
DonH50 is online now  
post #6 of 7 Old 02-16-2019, 11:08 AM
Senior Member
 
MTVhike's Avatar
 
Join Date: Jun 2009
Location: North Shore of central Long Island, NY (Stony Brook)
Posts: 318
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 196 Post(s)
Liked: 42
What's the input impedance on each of the subs? If one has a lower impedance, then connecting it will reduce the output on the other. However, I thought all (most?) subs were driven by line-level signals which shouldn't be significantly affected by a line level input. Another thought, is one sub designed for speaker-level inputs?
MTVhike is online now  
post #7 of 7 Old 02-23-2019, 02:21 PM
AVS Forum Special Member
 
jcmccorm's Avatar
 
Join Date: Mar 2001
Location: Madison, AL, USA
Posts: 4,500
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 602 Post(s)
Liked: 449
Quote:
Originally Posted by DonH50 View Post
It's also possible there is some cancellation going in when both are operating that goes away with one... This cancellation may be to better flatten the response by bringing down a peak so is not necessarily bad.
^^^

I agree that this needs checking. Check phase of the subs and distance settings for the sub outputs. I think that it's more likely that some cancellation is going on.
jcmccorm is offline  
Sponsored Links
Advertisement
 
Reply Audio Theory, Setup, and Chat

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