Question about Amplifier Crossovers

[bmr4life 0]

I'm in need of either a 2 or 4 channel amp to drive my 6x8s and 8" midbass speakers. I'm only used to mono sub amps so this question may seem silly.

My concern is I want to set a High and low crossover for the midbass. A range like 80 to 250hz while the 6x8's play 250hz and up.

A) Do 4 channel amps allow you to set a high and low x-over at the same time?

B) Can I just use a 2 Channel amp and buy passive crossovers that will send 80-250hz to the midbass and 250hz and up to the 6x8s?

Edited April 16, 2008 by S197

[///M5 2,833]

Some amps can bandpass, but they aren't typically the cheap ones. If you go "3 way" you should really, really, really scrap the 4x6's. With a midbass playing to 250-300hz you could easily get away with only a 3" mid or choose a 4" for easier mounting. Sort of depends on your tastes, but it would be a huge waste to mix a midbass with the 4x6's.

[bmr4life 0]

Thanks for the response.

My car came with 6x8s and 8s in the doors. I replaced the 6x8s with some Infinity 682.7's. I actually like them a lot.

I guess I could just get an external 3 way cross over and a lowerend 4 channel amp. I didn't want to replace the stock 8s just to save some cash.

[shizzzon 461]

dont know how much power you are lookin for but the sundown 100.4 amp does bandpass on all 4 channels higher than what you need so it would fit you perfectly.

rated at 100x4 @4ohm 160wx4 @2ohm.

[muddybass 13]

well if u want a 2 or 4 channel amp now is the time sundown still has them on sale to the 20th so only a couple days left better hurry

[helotaxi 46]

The 100.4 cannot bandpass. Your options are either high pass, low pass or full range (choose one) on each channel pair.

[emperorjj1 2]

hmm ive never seen an amp that can do bandpass

[///M5 2,833]

Thanks for the response.

My car came with 6x8s and 8s in the doors. I replaced the 6x8s with some Infinity 682.7's. I actually like them a lot.

I guess I could just get an external 3 way cross over and a lowerend 4 channel amp. I didn't want to replace the stock 8s just to save some cash.

I don't quite understand exactly what you are asking anymore. Please clarify before you spend more money as you have already chosen not to save by buying the 6x8's.

[shizzzon 461]

The 100.4 cannot bandpass. Your options are either high pass, low pass or full range (choose one) on each channel pair.

# CH 1 & 2 Variable HP crossover 50 - 5000 Hz @ 12 dB

# CH 1 & 2 Variable LP crossover 50 - 500 Hz @ 12 dB

# CH 3 & 4 Variable HP crossover 50 - 500 Hz @ 12 dB

# CH 3 & 4 Variable LP crossover 50 - 5000 Hz @ 12 dB

# 10 Hz - 500 Hz variable subsonic filter (CH 1&2 and CH 3&4)

# Subsonic filter allows for band-passed crossover configuration

How can it not do bandpass?

If someone wanted to run a bandpass between 60-300hz... u can do it with this amp.

I plan on buying this amp because it can bandpass.

[emperorjj1 2]

are u sure it doesnt have a HP/LP switch like most amps? Like i said ive yet to see an amp with bandpass support so this is new to me if it can

[shizzzon 461]

thats what it is, it has typical HP/LP/Full.

However, since the subsonic filter can go as high as 500hz, it can do bandpass.

[bmr4life 0]

The 100.4 cannot bandpass. Your options are either high pass, low pass or full range (choose one) on each channel pair.

# CH 1 & 2 Variable HP crossover 50 - 5000 Hz @ 12 dB

# CH 1 & 2 Variable LP crossover 50 - 500 Hz @ 12 dB

# CH 3 & 4 Variable HP crossover 50 - 500 Hz @ 12 dB

# CH 3 & 4 Variable LP crossover 50 - 5000 Hz @ 12 dB

# 10 Hz - 500 Hz variable subsonic filter (CH 1&2 and CH 3&4)

# Subsonic filter allows for band-passed crossover configuration

How can it not do bandpass?

If someone wanted to run a bandpass between 60-300hz... u can do it with this amp.

I plan on buying this amp because it can bandpass.

I just bought a b-stock one from dbr for $250.

Thanks to everyone that helped out in this thread.

[helotaxi 46]

thats what it is, it has typical HP/LP/Full.

However, since the subsonic filter can go as high as 500hz, it can do bandpass.

Gotcha. Fair enough.