How to equalize a bi-amplification setup?


Greetings!

Any one experienced in bi-amplification setups with different amplifiers, where output must be equalized?

In my bi-amp setup I use one pre-amplifier connected two different amplifiers, via balanced and unbalanced connection, feeding a pair of 2-ways loudspeakers (Pass Aleph P, Pass Aleph 3 on tweeter and Pass Aleph 0s on woofer).

Problem is the Aleph 0s results in a final higher sound volume (at least +3dB). Theorically I think this should not happen as manual gain of both amplifiers indicate a +20dB gain, altough the Aleph 0s outputs much more current.

How can I "calm down" the bass amp without comprimising the sound quality and without opening the loudspeaker to introduce one attenuation circuit?
sony
I BI-Amp the lows with a different amp and use a behringer parametric Eq to adjust the input sensitivity and equalize two room resonances. I realize I am putting another device between the preamp and bass amp, however the ability to have relatively flat in room bass responce far outways the negatives. (At least for me)Pipe organ is a joy without that 40Hz room resonance I used to have and I don't have to mess with the mids and treble.
I don't remember your gear...it's been a while. Can you switch inputs on the amps so that the extra gain from using balanced is on the upper freq's and not the bass. 3db is not a lot and may be able to be smoothed out a little from speaker placement with a pick-up of 1-2db in the bass freq's through room gain.

I usually don't post on gear I'm no longer up on but did use this type of approach at one time in a past setup...sounded much more in step so if no use with your problem...may help someone else latter.

Dave

Dave
I don't remember your gear...it's been a while. Can you switch inputs on the amps so that the extra gain from using balanced is on the upper freq's and not the bass. 3db is not a lot and may be able to be smoothed out a little from speaker placement with a pick-up of 1-2db in the bass freq's through room gain.

I usually don't post on gear I'm no longer up on but did use this type of approach at one time in a past setup...sounded much more in step so if no use with your problem...may help someone else latter.

Dave
Herman, you're right! I've confirmed the "problem" is the pre-amplifier. According to Pass Aleph P manual, Gain: 15dB balanced out; 9dB unbalanced out.

So, we're talking about a 6dB difference!

Cadet1, what's the model/price of the behringer parametric Eq?
Behringer PEQ 2200 Ultra-Q 5 band parametric. On sale at parts express for $69.99. These are mono so you would need 2. very good for the money. In case you are wondering, my syster is proceed electronics and revel M-20 speakers with DIY subs which are equalized. I hope to soon get revel studio's and passively bi-amp and eq the woofer section below 200 Hz. Parts express has a return policy so you can't go wrong.