Question crossover (8 Ohm to 4 ohm)

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   I have som really well built passive crossovers for 1 JBL 2226H 8 Ohm LF driver and 1 JBL 2426H 8 ohm HF driver.

As seen on picture it has totally seperated  separate HF and LF PCB cards. 

I have many sets of these crossovers.

Here is the deal I want to try using this for dual 15" (+ HF driver) cabs. Problem is of course the LF section of these crossovers are 8 Ohms and when 2 15" I need it to be 4 Ohm.

Since the HF and LF are on seperated PCB cards can I use 1 pcs LF PCB to each woofer in the dual 15" cabs? Would this work?

I know there is much more to it like damping, sensitivity etc but am I thinkring right regarding the resistance of the 15" and using 2 seperate LF cards to each woofer?

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serioussound Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 01 December 2013 Status: Offline Points: 443	Post Options Post Reply Quote serioussound Report Post Thanks(0) Quote Reply Topic: Question crossover (8 Ohm to 4 ohm) Posted: 01 January 2021 at 8:41pm
	I have som really well built passive crossovers for 1 JBL 2226H 8 Ohm LF driver and 1 JBL 2426H 8 ohm HF driver. As seen on picture it has totally seperated separate HF and LF PCB cards. I have many sets of these crossovers. Here is the deal I want to try using this for dual 15" (+ HF driver) cabs. Problem is of course the LF section of these crossovers are 8 Ohms and when 2 15" I need it to be 4 Ohm. Since the HF and LF are on seperated PCB cards can I use 1 pcs LF PCB to each woofer in the dual 15" cabs? Would this work? I know there is much more to it like damping, sensitivity etc but am I thinkring right regarding the resistance of the 15" and using 2 seperate LF cards to each woofer?

DMorison Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Online Points: 1649	Post Options Post Reply Quote DMorison Report Post Thanks(0) Quote Reply Posted: 02 January 2021 at 1:47pm
	Yes, using one LF card per woofer will get you roughly the "normal" response you're used to having from single 15" driver boxes. You'll find that the pair of 15's will likely outrun the HF, so you must take that into account, and there will be some comb filtering between the 15's in the vertical axis that may or may not matter to you, depending on what the actual crossover frequency is, and how much you care about even coverage.