Originally Posted by
spkrman57
This should be a simple decision for the experts out there.
I have a E-130/2225 and a E-140 for 100hz front loaded horn duty.
I ordered the horn from Bruce today and while it takes a long time for Bruce to actually get the horns to me, I thought I would gather opinions on which 15" JBL driver to actually use in this horn.
E-130/2225 (recone - thread info already in this forum) has 98.5 db/Qts=.226
E-140 has 100 db/Qts=.17 (aluminum dust cap replaced with paper)
In theory, I would like to go with the more efficient driver as I am using 45 SET amps for 2 wpc. By horn-loading will add approx 6 db.
I have a feeling the answer comes down to which one will have the flatter response used in this scenario.
So, should I go with the E-140 and have surgery performed to change the dustcap to paper, or maybe the E-130/2225 might have the flatter response????
So here I am again asking the pros for their advise. I realize I am one of the few tubes and horns fan club member, but I love the sound of a good 45 SET amp!!!
The expected response will be 100hz to 800hz and will be using 1st order crossovers. Great Plains 399 driver(1.4" same as 288-8K) on round tractix horn takes over at 800hz.
Simple decision here, which driver to use????????
Regards, Ron