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In Reply to: RE: Tracktrix Horn Upgrades posted by John Sheerin on July 24, 2016 at 22:53:16
Hi John,
Thanks for sharing the details of your speaker XO.. Yeah, it all boils down to certain variables.. There's a steep learning curve for some non-engineering folk like me when it comes to this.. I mean, knowing where to start (beyond the empirical) with all the options for a mid horn 2 way with DR midbass. So I really envy guys who can "pick these things up" easily.
I've seen a photo of your JBL Be pro based diy JMLC wood mid horn with the 15" DR bass bin, plus modified horn tweeter on top in another forum almost a couple of years ago. It really looked sweet, and I bet it sounds sweeter.. I'm thinking though that with vintage type drivers (Altec-GPA small format comp driver) and Altec midbass, maybe I could get away with some mild Eq for the mid horn and likely non at all with Altec DR midbass.
Anyway, apologies to the OP for diverting the topic to crossovers.
Regards....
Follow Ups:
Hi Fred,
How much eq you would need would just depend on your drivers. I needed some EQ on both midbass and midrange to get it to meet my crossover targets. Here's my JBL 2225 in its sealed enclosure along with my target and the eq needed.
Thanks John... I'm curious as to what Active XO/DSP software, and what amps for multi-amping, and source/s you use.
The convenience of changing XO settings on the fly to hear the differences is really nifty..
Regards...
Hi Fred,
It sounds weird, but I use an old Mark Levinson car amplifier I have that has an AD Sharc built in along with 16 channels of discrete amplifiers. I'm using Crown amps for the low frequency channels. I have a miniDSP setup that I eventually want to transition to that will let me use FIR filters in addition to parametric ones. Then I'll have to find some different HF amps to go with that. I do all my filter design and measurements with Matlab.
Hi John.. Thanks for the details, miniDSP seems like a good affordable kit for relative new comers to active-digital.. That's actually cool, ML car amps. If they're relatively old, I'm also a fan of Madrigal Audo Labs designs, even if I still havr a bias for glassware. I guess you have the Harman setup for the mids and up since HK owns both JBL and ML these days.. Nice, I've seen a few folks use new Crown amps for the LF and low mids.
Thanks again.
Regards....
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