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Full range with low pass high SPL sub?
Full range with low pass high SPL sub?
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Old 26th April 2011, 11:31 PM   #1
dainrobert is offline dainrobert  United States
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Default Full range with low pass high SPL sub?

Could a full range like the Mark audio 10.2 be run through a potentiometer to control output and matched with a sub of equal or lesser efficiency on a low pass filter say Hz. Could you in theory balance the output of the Mark audio 10.2 with the pot to the subs low pass output and have a complementary system? This would be in some sort of tower unit, of course the two drivers chambers would be separate.
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Old 27th April 2011, 07:24 AM   #2
chris661 is offline chris661  United Kingdom
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In theory, yes you could.

In practice, very few people would do it that way: especially for a high-SPL application, the crossover parts required will be extremely large, and therefore expensive. Potentiometers also have low power handling compared to, say, a ceramic or aluminium clad resistor.

The alternative is to use a second amplifier to drive the woofers, and put the crossover before each amplifier, ie, create an actively crossed over system.
The parts are much cheaper than a passive (after an amplifier) crossover, regardless of if you wanted to go fully active (with op-amps and stuff) or passive line level, which involves a combination of resistors and capacitors to alter the signal going into the amplifier.

My work: www.grimshawaudio.com
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Old 27th April 2011, 11:50 AM   #3
norman bates is offline norman bates  United States
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an active crossover would make this a much easier project.
And they are fairly cheap ($100 used).

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