How do you high pass your main speakers?

@tony1954,

See article below:

Mike

http://www.soundstagenetwork.com/maxdb/maxdb061999.htm

@ditusa Nah

Hi,

You need to use line level OUT  to ______ a device that separates only the low bass frequencies,  and that device then passes only the remaining upper bass/mids/highs back TO the Preamp or back TO an integrated amp.

A tape out/in loop; a processor out/in loop; a unit with preamp (line level) out, and line level input jacks

Thus the amp and the main speakers only try to make upper bass/mids/highs.

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integral crossover:

here's a Raven Blackhawk Integrated Amp with an integral high pass, 80 hz crossover: sends 80 and below out to separate amp(s), like self-powered sub(s). Crossover point is not adjustable, 80 hz is their single setting.

then the blackhawk amp and the main speakers only try to make 80hz and above

https://ravenaudio.com/product/blackhawk-mk3/

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simple self-powered subs

have built-in crossovers, you go preamp line out, to sub's line in, then sub's line out (low bass missing) to preamp line in. preset sub's adjustable crossover and preset sub's volume (, then your preamp changes the volume of main and subs together

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external crossover

use a loop out of preamp to external crossover, back into your preamp. or line out to external crossover and line in of an integrated amp

a tape loop, processor loop, line in/out loop

crossover and volume

Ideally you want an adjustable crossover to find the best setting with your main speakers and your low bass speaker(s), and

adjustable volume, remote volume ideal.

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separate amps for the sub(s) somewhere, how volume controlled?

Ideally you would want to insert a high pass filter AKA electronic crossover, between your preamp and amplifiers. If your amp is an AVR this feature I believe is built into most of them. If you are not using an AVR you have a few options at varying price points. A lot of people seem to like the miniDSP, DBX makes an economical analog crossover and there are other options, including some that can sell for several thousands of dollars.

I’m not sure that there is an ideal crossover point, kinda depends on the style of music you like, how loud you like to play, the kind of subs you have and to some extent your room acoustics, If your subs are close to your mains you could crossover as high as 200 Hz if your subs can cycle that high. If your subs are not inline with your mains you would want to crossover no higher than 80 Hz. I play a lot of bass centric music at rather loud volumes so I cross my front subs at 173 Hz and my rear subs at 78 Hz.

Marchand XM446 balanced high pass filter.  
Scroll down to see the balanced version.  It is a passive filter and works well.

Here is another interesting option.