RE: I'm not so sure that an amp 'seeing' a very high reactive load is going to have any problems.

A crossover has a minimum of two filters, each feeding a driver.

When you have one channel of an amplifier feeding a passive crossover, the woofer presents it's impedance to the amplifier up to the crossover frequency and then the tweeter presents it's impedance to the amplifier from the crossover frequency on up.

When you drive the passive low pass filter (for the woofer) with one channel of a amp and the high pass filter (for the tweeter) with a different channel of a amp, each channel of the amp is only loaded within the frequency bandwidth of the associated filter.

Outside of that bandwidth (above the crossover point for the woofer and below the crossover point for the tweeter) each amp is being left un-loaded but still driving those frequencies outside the bandwidth of each filter.

When you use a active crossover before the amplifier channels each amp is still only being loaded within the crossover bandwidth and is left unloaded outside of the bandwidth of the filter but the channels are not playing the frequencies outside of the bandwidth (where it is un-loaded).

Tre'

Have Fun and Enjoy the Music
"Still Working the Problem"

This post is made possible by the generous support of people like you and our sponsors:

Follow Ups Full Thread

Topic - Question about bi-amping with fixed-gain amps - bystander 10:46:37 05/11/25 (24)

Thanks everyone, and a bit more context - bystander 07:36:44 05/13/25 (5)

Sure it would - E-Stat 08:06:59 05/13/25 (4)

The Mac amps aren't the issue - bystander 08:48:58 05/15/25 (3)

Not an *issue*, but - E-Stat 08:56:57 05/15/25 (2)

Bi-amping an individual speaker only makes sense if using a line level electronic crossover - Chip647 11:23:33 05/15/25 (1)

Well, seems more common when - E-Stat 13:58:46 05/15/25 (0)

Go here - Ozzie 19:29:15 05/12/25 (0)

I used this - Leo loves music 11:02:27 05/12/25 (4)

Yes, I think that would work - bystander 08:50:35 05/15/25 (0)

Do you know what brand pot is used for volume control? n/t - madisonears 18:43:05 05/12/25 (2)

It's hard to tell from the picture - Tre' 07:28:00 05/15/25 (0)

RE: Do you know what brand pot is used for volume control? n/t - Leo loves music 18:55:56 05/12/25 (0)

Like Jonesy - E-Stat 10:48:13 05/12/25 (0)

RE: Question about bi-amping with fixed-gain amps - Jonesy 09:57:53 05/12/25 (3)

RE: Question about bi-amping with fixed-gain amps - MaggiesAndCats 19:24:31 05/12/25 (2)

RE: Question about bi-amping with fixed-gain amps - Jonesy 19:53:12 05/12/25 (1)

Will do - MaggiesAndCats 13:21:17 05/13/25 (0)

"Gain Controls" are just a potentiometer on the amps input - Chip647 06:10:41 05/12/25 (0)

RE: Question about bi-amping with fixed-gain amps - rrikola@hotmail.com 18:40:33 05/11/25 (5)

RE: Question about bi-amping with fixed-gain amps - Chip647 06:16:05 05/12/25 (4)

I don't think that there will be 'no load' outside of the crossover... - MWE 08:33:12 05/12/25 (3)

RE: I don't think that there will be 'no load' outside of the crossover... - Chip647 13:05:23 05/12/25 (2)

I'm not so sure that an amp 'seeing' a very high reactive load is going to have any problems. - MWE 13:16:51 05/12/25 (1)

RE: I'm not so sure that an amp 'seeing' a very high reactive load is going to have any problems. - Tre' 17:26:52 05/12/25 (0)

Follow Ups

RE: I'm not so sure that an amp 'seeing' a very high reactive load is going to have any problems. - Tre' 17:26:52 05/12/25 (0)

RE: I'm not so sure that an amp 'seeing' a very high reactive load is going to have any problems.

Post a Message!