I won’t need much power and I ‘d like a mating that will be wonderful and long-lasting, forsaking the flash in the pan.
Sadly, I couldn’t think of an updated analog to Jessica Tandy.
Sadly, I couldn’t think of an updated analog to Jessica Tandy.
I happen to have a kit still in the packaging (I chose the red case upgrade, for some reason).
it's cheap and , sonic wise , enormous bang for the buck
when you make that , enjoy it , and in lazy way - take one of M. Rothacher's FET Single End amps
when you make that , enjoy it , and in lazy way - take one of M. Rothacher's FET Single End amps
If the driver is particularly delicate you want to remember that the ACA
has a turn-off thump. If you are using a passive high pass crossover network
it should be OK.
has a turn-off thump. If you are using a passive high pass crossover network
it should be OK.
if dealing with driver directly , it's wise to use speaker delay circ (delayed on, immediate shut off) with cap output amp , or speaker protection , with DC coupled amp
The F2 is a great amp too.
About the turn-on thumps on the ACA or F2: With a compression driver you don't really need the bass extension the regular amps have and so you can reduce the size of the output cap dramatically, extra protection for your driver and also reduces the thump by a lot.
Depending on how low you want to cross you could get away with as little as 100 uF => 1.6 ohm @ 1000 hz. That would reduce the output thump to less than 1/20 if my math is correct.
About the turn-on thumps on the ACA or F2: With a compression driver you don't really need the bass extension the regular amps have and so you can reduce the size of the output cap dramatically, extra protection for your driver and also reduces the thump by a lot.
Depending on how low you want to cross you could get away with as little as 100 uF => 1.6 ohm @ 1000 hz. That would reduce the output thump to less than 1/20 if my math is correct.
I am planning to use an active crossover on Celestion CDX1-1730 pro compression drivers. I'm thinking of a relatively low crossover frequency, perhaps down in the 1,000 - 1,200 Hz range.
Sensitivity is in the 110 dB SPL range, so power requirements are modest, to say the least.
Sensitivity is in the 110 dB SPL range, so power requirements are modest, to say the least.
And another thing:
As you have a fully active speker I vote for going with a current source amplifier like the F2 if you remove the parallel resistors so the output impedance is ~ 1000 thus lowering the distortion in the compression driver.
I love current source amplifiers, my current tweeter amps are pretty much the bottom part of the F2 but the CCS swapped for a Hammond 193T inductor to get higher efficiency.
As you have a fully active speker I vote for going with a current source amplifier like the F2 if you remove the parallel resistors so the output impedance is ~ 1000 thus lowering the distortion in the compression driver.
I love current source amplifiers, my current tweeter amps are pretty much the bottom part of the F2 but the CCS swapped for a Hammond 193T inductor to get higher efficiency.
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