Crossover Question

[alphakenny1 10+ year member]

I just purchased a USAmps 5600x and i was looking at the specs online and looking at the pictures and it seems like that you cannot turn off the crossovers on the amp. http://usamps.com/old_site/products...600x_end_01.jpg. of course i'm running an active setup so if i have the amp crossovers on, it will definately affect the speakers right? can anything be done so the crossovers on my hu will effectively work? also wtf, can i at least HP or LP on the amp? doesn't even state on the amp whether its HP or LP crossover frequency. any help is appreciated, thank you.

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[squeak9798 5,000+ posts]

Your link don't work.

If they aren't bypassable...then you're going to have to set them to their extremes, assuming the frequency will be outside of the bandwidth your speakers will be playing.

Though, here is the US Amps forum: http://www.soundsolutionsaudio.com/forum/index.php?showforum=43

I don't know much about that particular amplifier's crossover networks.

 

[alphakenny1 10+ year member]

http://usamps.com/old_site/products/inv/usa-5600x.htm

the picture i showed was the crossovers not being bypassable.

but what i was thinking is that if let's say set the bass frequency on the amp to like 100hz, but if i set the LP on the sub on my HU for 63hz @ 24db, then no matter what the sub will only see 63hz and below because the signal that it sends the amp will be 63hz and below and hence the sub will only see 63hz and below. will it work that way? thank you.

 

[squeak9798 5,000+ posts]

http://usamps.com/old_site/products/inv/usa-5600x.htm
the picture i showed was the crossovers not being bypassable.

but what i was thinking is that if let's say set the bass frequency on the amp to like 100hz, but if i set the LP on the sub on my HU for 63hz @ 24db, then no matter what the sub will only see 63hz and below because the signal that it sends the amp will be 63hz and below and hence the sub will only see 63hz and below. will it work that way? thank you.

Yes, it will work that way.

But the actual slope would end up being steeper, since the amp's xover would likewise be attenuating the signal. Remember that at the xover point, the signal is down 3db. So, the amp's xover would be taking that already attentuated signal from the HU, and begin also attenuating it so that it's another 3db down at 100hz, and then continue attentuating the attenuated signal based on the amp's crossover.

So yes....the passband would stop at 63hz, but the effective slope would be steeper than 24db/oct.

 

[alphakenny1 10+ year member]

okay cool. good info. i guess i could live with a steeper slope than given. thanx again.