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Old 05-12-2013, 01:11 AM
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running 4 speakers on 2 cn

just a quick question, will it damage the amp or the speakers to run 4 speakers on 2 channels On a JL xd400 amp and jl mx650 speakers? Use channel 3&4 to run a small sub?
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Old 05-12-2013, 05:25 AM
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Originally Posted by DooSPX View Post
just a quick question, will it damage the amp or the speakers to run 4 speakers on 2 channels On a JL xd400 amp and jl mx650 speakers? Use channel 3&4 to run a small sub?
If the amp is rated for 2 Ohm operation (yours is), connecting two speakers to each channel shouldn't be a problem. If the amp has crossover filters, use the HP (High Pass) on the smaller ones. If you need to be able to use the front/rear fader, this won't work for you. If you find that you only fade the front speakers down and always leave the rear/tower speakers at full volume, there's a way to run the sub and rear speakers in 4 channel mode AND connect it to a sub in what has been called 'tri-mode', but A) the sub needs to be very sensitive in order to achieve high SPL, B) the rear speakers and sub need to be of similar sensitivity if their relative levels will be balanced and C) you'll have to use a low pass filter on the sub and a high pass filter on the rear speakers. If the sub has dual voice coil, this may not work as well because the impedance may be an issue. Considering the cost of the crossover components, you may be better off getting a separate amp for the rear speakers and bridge the other two channels on the XD400 for the sub, using the active LP filter in the amp- passive crossovers cause 'insertion loss' (loss of signal level, due to how they react to the signal) and this is really wasted power that can't be recovered because the amp's power is limited by its design.
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Old 05-12-2013, 10:56 PM
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Thank you Jim! I never have used the fader on my stereo. Volume up, down or off that's it. Good to know I can hook up my four speakers to the front channel and the sub to the rear. Thank you again!
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1991 PROSTAR 190 Flagship Blue POWERSLOT OJ XMP CNC 13.7x17.5 .110 4B
A.K.A. One of a kind mistake
2011 Best In Show- 1987-2000 class

Trying to keep slalom alive

Need a new prop to fit your needs? Call OJ PROPS 800-359-9730

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