Was setting the gain and...

[djmadfx 10+ year member]

I was setting the gain on my Profile CL600 amp the other day. I needed to reach 40 volts @ 4ohms (~400w RMS). Now keep in mind that I have a crappy DUAL head unit with a 2v preout. So anyway, I go to turn up my gain (using 50hz @ 0db) and I only had to turn it up around 1/5th of the way. Now I started thinking to myself that maybe my DMM was incorrect or something because that's pretty darn good for a 2v preout. I had my head unit set at my usual settings... volume 30/46, bass +6/+6, treble +6/+6.

Why is it that I only had to set my gain around 1/5th of the way with the 2v preout?

Is it due to me having the bass at +6?

If I keep the bass and treble at 0, would my subwoofer sound the same loudness wise?

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[helotaxi 5,000+ posts]

If +6 is +6 dB, then you are asking the amp to produce 4x the power as compared to 0. Set it with the bass boost flat and leave it there.

 

[djmadfx 10+ year member]

Will my woofer get as loud and hit as hard without the boost, but with the same wattage?

 

[djmadfx 10+ year member]

Anyone else?

 

[headless 10+ year member]

Yes, it will be just as loud if you tweak your gain so it's getting the same output without the boost as with it. Bass boost does just what it sounds like; it makes the bass louder. If you turn the entire signal's strength up, you don't need to boost the bass anymore. If you had your treble AND bass at max...and you make them 0, everything gets quieter. Then you turn up the gain, and it gets louder again. ta-da.