The circuit i drawn is the stage (filter) before the amplifier ... therefore ... the input signal should enter the filter as shown and the filter output goes into your amplifier ... do u have the full photos of your parts that u r going to use for ur project ... ? is kinda hard to figure out if i dunno what u had in mind
A passive low-pass would be physically very large and expensive.
It would be cheaper, and produce better sound quality, to use an active crossover and another amplifier channel. By using an active crossover, you can also take bass duties away from the midrange speakers, leaving them with more headroom.
Chris
It would be cheaper, and produce better sound quality, to use an active crossover and another amplifier channel. By using an active crossover, you can also take bass duties away from the midrange speakers, leaving them with more headroom.
Chris
I am using this amp. http://www.amazon.com/Gikfun-Channe...r=1-4&keywords=2+channel+amplifier+class+d+3w
I used to use a Ratshack 3 way active (before amp) automotive crossover that I bought for $19.95 (in the late '80's).
It did require 12 volts but so did the 300W automotive amp on my subs.
You might look at EBAY under "crossover car audio".
There are a few for $10 to $30.
Optimus Electronic Subwoofer Crossover | eBay
Before that I used a right out of the big linear design handbook, State Variable Filter circuit that was on a plastic protoboard for years.
It worked quite nicely.
Or, the circuit shown above would work well.
If you wanted to use a passive XO and those amps for both subs and main speakers, a passive XO might use up 1/2 of your power depending on it's topology.
Best of luck,
Dave
It did require 12 volts but so did the 300W automotive amp on my subs.
You might look at EBAY under "crossover car audio".
There are a few for $10 to $30.
Optimus Electronic Subwoofer Crossover | eBay
Before that I used a right out of the big linear design handbook, State Variable Filter circuit that was on a plastic protoboard for years.
It worked quite nicely.
Or, the circuit shown above would work well.
If you wanted to use a passive XO and those amps for both subs and main speakers, a passive XO might use up 1/2 of your power depending on it's topology.
Best of luck,
Dave
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