Gain: Less 'Is' More

Bwcad1 · Post by **Bwcad1** » Thu Apr 17, 2008 5:01 pm

try gain matching with 2 amps on one sub and setting the amps to the same voltage without a sub attached and watch the sub rip apart

Jonathan · Post by **Jonathan** » Thu Apr 17, 2008 10:55 pm

Bwcad1 wrote:try gain matching with 2 amps on one sub and setting the amps to the same voltage without a sub attached and watch the sub rip apart

That's a lil different lol but even though uncommon it's noteworthy I guess.

Bwcad1 · Post by **Bwcad1** » Fri Apr 18, 2008 3:38 am

lol just thought i would point it out.

cargodz · Post by **cargodz** » Fri Apr 18, 2008 4:15 am

Bwcad1 wrote:try gain matching with 2 amps on one sub and setting the amps to the same voltage without a sub attached and watch the sub rip apart

Although it does sound like something we'd do just for fun just before socket testing a sub

LOL

solacedagony · Post by **solacedagony** » Fri Apr 18, 2008 6:06 am

JeremyC wrote:He could even go as low as -5 db without being able to hear any distortion.

This is why I recommended setting the gains for the front stage with hot music instead of test tones. If he tests one of the hotter songs that he has and doesn't get clipping/distortion, he surely isn't going to with the quieter ones.

jjohan35 · Post by **jjohan35** » Tue Apr 29, 2008 3:56 pm

JeremyC wrote:My W7 was set at 63 hertz 24 db (the lowest my eclipse would let me), but I was running focal utopia mids so they didn't have a problem filling in.
I will probably rum my morels a little higher, depending on how well they blend with my new mids.
So it really depends on your setup. If the mids and subs blend well at 65 leave it there. If you notice your lacking in your lower mid bass, bring the x-over up to around 80.
Don't worry about all the questions. I like it when people want to learn, and are coming up with good questions.
As for your ground. EVERY piece of my stereo is grounded in the same spot. All 4 amps, processor, CD changer, and my deck. This eliminates the chance of a ground loop forming between 2 components, and giving you some crazy noise.

Is there a way to control the crossover on the amp for specific frequencies? I look at the knobs on my amps and they only have 3 numbers on them (100, 200, 300). I'm just wondering how you're getting '65' and '80' when there doesn't seem a precise way of knowing what frequency I'm at according to the knob.

JeremyC · Post by **JeremyC** » Tue Apr 29, 2008 4:43 pm

Yeah it depends on the amp, or the x-over your using. I was using the x-over in my eclipse deck, which is digital. So I could set it at exactly what I wanted.

With a control like yours, you would just have to play with it. I would start around 80 (or what appeared to be 80 on the knob) and then tweak it till you got the sound you wanted.

Thats actually the easiest way to set a x-over. By ear, adjusting till it sounds the best to you. Once you start going active, or digital it gets way more complicated, and time consuming.