What level do you set your gain? - Page 2 - AVS Forum
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post #31 of 41 Old 06-19-2014, 11:14 AM
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Originally Posted by fatbottom View Post
What if I have JM Labs Grand Utopia and it detects them as small?
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post #32 of 41 Old 06-21-2014, 08:01 AM
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Quote:
Originally Posted by eljaycanuck View Post
You want to set the gain on the sub so that you get the best overall calibration with Audyssey.

Generally speaking, this is what you want to do:
1. Set the gain control on the sub to roughly "two o'clock"; crank the LPF knob fully clockwise (to disable the sub's LPF) and set the Phase to "0°".

2. Run the first cycle (all 6-8 positions) of Audyssey, calculate, store and then check the levels in your receiver's speaker set-up menu.
i) If the speaker levels are at around 0dB, and the sub level is within ~6dB of the level of the speakers, proceed to step 3.
ii) If the sub level is too low, lower the gain on the sub itself; if the sub level is too high, raise the gain on the sub itself; then re-run step 2.

3. Run all cycles of Audyssey, calculate and store. Then go into the speaker set-up menu and:
- set all speakers to "small";
- set the crossover to the level suited to your speakers (for good-quality bookshelf speakers and larger, that's usually 80Hz);
- leave the LPF of LFE at 120Hz (if you have the option to do so; if you don't, it will likely be defaulted to 120Hz anyway); and
- bump the level of the sub by ~3-6dB (if desired) but do NOT touch the gain control on the sub itself.
Maybe I'm misunderstanding your post. But are you saying to ignore the first step of Audyssey which asks you to set your sub level to 75db's? This sounds like you would be ignoring this.

Thanks,
Dan

Little Loft Home Theater
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post #33 of 41 Old 06-23-2014, 09:46 AM
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My routine:
  1. Follow standard procedure (as outlined in previous posts). Then fine tune as follows.
  2. Play some jazz or boogie-woogie with a walking string bass line (up and down the scale).
  3. If the bass notes fade in and out, move the sub elsewhere.
  4. If you hear a booming sound from some notes, turn down the sub's crossover control until boom goes away.
  5. Still playing the walking bass, seize the gain control with your right hand and rest the fingers of your left hand on the sub's front grill. Turn the gain up or down to find the place where you just start to feel the bass notes as the grill pulses against your fingers.

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post #34 of 41 Old 07-11-2014, 09:22 PM
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On my 2 10in subs I have my gain knob set to the lowest which is 50hz on my subs and vol knob at 3oclock then on my harmon kardon avr it goes to +10db down to -10db I leave it at -5db running at volume -20db
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post #35 of 41 Old 07-11-2014, 11:31 PM
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I have owned many subs and none of them require the gain past 12 O'clock. All the rooms where greater than 4000 cu. ft. Currently I have 4 subs with the gain around 9 O'clock. The gain control on the sub should be set to properly calibrate the sub to around 73-75 db.

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post #36 of 41 Old 07-12-2014, 02:07 AM
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When my wifes says, "THERE the bass is perfect !!!", I stop and then I add 6 dB when she is not looking
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post #37 of 41 Old 07-12-2014, 04:30 AM
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I set the gain on each of my subs individually to get a reading of 73-75 dB with subwoofer pink noise. I don't know what position the gain is in, as it is totally meaningless. All that matters is that you are around this 75 dB mark. I then ran YPAO(or audysey or whatever), and it set my subwoofer trim to -8. I bumped it to -2. I made a slight adjustment to one subs gain to improve the frequency response while fine tuning with REW. I think this step is often overlooked. Doing this improved frequency response in a certain area substantially and resulted in better headroom(+5 dB over a 20 Hz band, 30-50 if I remember)

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post #38 of 41 Old 07-12-2014, 05:19 PM
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Setting the gain 73-75 db is fine for one sub. When using more subs, the level should be lower. For example, with my 4 subs, each sub is set to around 66 db. When all 4 are cut on and playing together the spl at the MLP is around 73-75 db. In the avr the level is -2.5. I try to stay just a little south of 0. This gives me a lot of room to cut the subs up or down in avr. The sub will play just as loud with a level in the avr of -2.5 as it will at -9. Also, the LFE play is the same.

Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus Five 200 amp, Chase SS 18.2(2), VS 18.1(2), Samsung BDP F 7500, Asus/My Book Live HPC 4 TB

Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500
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post #39 of 41 Old 07-12-2014, 08:55 PM
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Quote:
Originally Posted by derrickdj1 View Post
Setting the gain 73-75 db is fine for one sub. When using more subs, the level should be lower. For example, with my 4 subs, each sub is set to around 66 db. When all 4 are cut on and playing together the spl at the MLP is around 73-75 db. In the avr the level is -2.5. I try to stay just a little south of 0. This gives me a lot of room to cut the subs up or down in avr. The sub will play just as loud with a level in the avr of -2.5 as it will at -9. Also, the LFE play is the same.
Not necessarily:

Gain, trim & headroom
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post #40 of 41 Old 07-12-2014, 09:32 PM
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Alan my system uses MCACC which is Pioneer. Auddysee may handle things differently. Headroom is determine by the amps power, sub design, or number of drivers. In other words, a sub can only go so loud based on these things. Changing the amp gain or trim just determines how quickly or slowly you reach the subs limits. Any elevated EQ on the low end will start to eat up headroom. Clipping the input signal is a different beast. I have never experienced that problem with any of my avr's or pro amps yet,,lol.

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Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500

Last edited by derrickdj1; 07-12-2014 at 09:36 PM.
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post #41 of 41 Old 07-12-2014, 10:39 PM
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Quote:
Originally Posted by htguru43 View Post
On my 2 10in subs I have my gain knob set to the lowest which is 50hz on my subs and vol knob at 3oclock then on my harmon kardon avr it goes to +10db down to -10db I leave it at -5db running at volume -20db
The "hz" knob is the crossover on the sub, has nothing to do with gain, by setting that low you are just cheating yourself out of LFE content in the sound track. If connected to the sub out or LFE on the receiver it should be set on bypass or as high as possible if no bypass setting. The crossover is handled by the receiver. The volume knob on the sub is the gain setting. At setup I usually try to set the gain on my sub at a point where the mains level is 0. The sub level can be adjusted up or down in the AVR to preference after setup. Also i did not see mentioned here is that most receivers will not output any bass signal except the LFE (.1 movie soundtrack) when speakers are set to large. That is why there are posts like "I get no bass from my sub with music" Was explained a bit in another post, when set to small all bass below the set crossover point will be redirected to the sub.
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