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Discussion Starter · #1 ·
I have a JBL SCS178 with it's included 8" powered sub. Is it ok (will it not clip or anything) to set the subwoofer volume knob to 12:00 or 1:00 position?


Tnx
 

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Tnx:


I'd suggest your beginning with careful touches on the volume knob, setting it, as a first approach at, say, 1/4 to 1/3 of the total range of the dial or scale. Then, based upon on what you hear (too much or too little bass), you can proceed with further adjustments and finetuning on the knob.


When dealing with power subs, it is better first to err on the conservative side volume-wise. You don't want to ruin your investment because of a reckless use of the volume knob. :)


J.V.
 

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Is the knob on your powered sub a gain control or a volume control? If it's the former, then many people recommend cranking it all the way up, and letting your receiver control the volume level for all channels.
 

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Quote:
Originally posted by fs1
Is it ok (will it not clip or anything) to set the subwoofer volume knob to 12:00 or 1:00 position?


Tnx
Tnx,


Keep in mind that every sub is different so 12 or 1 position doesn't mean the same thing to everyone. I think you are asking if it is okay to turn your sub's volume/gain up to 9/10th's or 10/10th's. J.V.'s advice is good. Start off gradual and work your way up. I have mine turned up to 50% and control the rest with my preamp. My friend has his gain set at 60-70% and also has the preamp set the level.


MD
 

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Discussion Starter · #5 ·
Guys/gals, I thought a gain control and volume was the same thing? How can I know if it's a gain or volume control. It just says "volume" on the knob---can I assume it's definitely a volume and not a gain control then?
 

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Well, I am a HT newbie, but a musician for as long as I can remember. For gain, it is additional amplification over and above the signal sent. Whereas volume would be controlling a signal level with no additional amplification.


I think that might be what is inferred in this application.
 

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Quote:
Originally posted by fs1
Guys/gals, I thought a gain control and volume was the same thing? How can I know if it's a gain or volume control. It just says "volume" on the knob---can I assume it's definitely a volume and not a gain control then?
It is a gain control, they just label it Volume as to not confuse people. (confusing isn't it).


Keep in mind they will (basially) perform the same function.
 

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This sub has limiter circuitry so it is almost impossible to damage (cuts the power before a problem).
 

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Quote:
Originally posted by Greg_R
This sub has limiter circuitry so it is almost impossible to damage (cuts the power before a problem).
Just because the sub has a limiter to prevent damage doesn't mean that you'd want to crank up the volume/gain to max level. Most components sound horrible (distortion) when they are playing at close to max levels.
 

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It's actually a sensitivity control. It's used to match the sensitivity of your driver to your front speakers. This allows proper mesh of level between your sub driver and you main speakers. Nothing more.


To me, there is one correct setting, and that is all. Listen to some Jazz albums and the bass lines shouldn't have a noticable change of level when they reach the crossover point of the sub...
 

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Discussion Starter · #11 ·
No worries :) I just borrowed AVIA...and calibrated :)


BTW, Im wondering why AVIA has all the test tones for LFE and woofer frequency range, but none for tweeters (very high frequency)...anyone have comments on this?
 

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Quote:
Originally posted by fs1
No worries :) I just borrowed AVIA...and calibrated :)


BTW, Im wondering why AVIA has all the test tones for LFE and woofer frequency range, but none for tweeters (very high frequency)...anyone have comments on this?
Perhaps it is becuase you can vary the output of the LFE, but very few have the capability (or need) to adjust the level of their tweets (except for +3db and -3db that you see some times).
 
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