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I have a pair of B&G RD50 planar drivers that may pair well with the 124a woofers. Didn’t even think of that. What would be optimal cabinet design/size for it though?

I love JBL 4 way studio...

Hi all,

I have a pair of JBL 124a in good condition and been trying to determine what would be best 3/4-way DIY setup I should be looking into. I was tempted by 4315, but I can’t find the midlow...

Yep I will try 'activating' the speakers in the future to see what they can really do.

For the meantime, I have used Nelson Pass' modified L300 xo circuit. Sounds pretty good even in mono. But...

Thank you kindly 4313B.

I was just looking at the Nelson Pass L300 3-way passive circuit. Looks straight forward enough to build.

When you say 'attenuating the LE85 and 077 an additional two...

Ahh, I had the wires into the woofer hooked up the wrong way! I had just assumed red = +ve. But took a look at the wires going into the mid and tweeter and green wire was going to +ve of the...

Yep, I am hoping it sounds like a L300! Not as strong impact as it only runs a 12" instead of a 15" on the L300.

Very well built cabinets on this one. about 30KG each speaker!


Can't wait...

Thanks macaroonie and Widget!

Oh, I totally didn't think about the polarity. I know that they are matching though (ie. both sides I plugged the green into -ve and red into +ve of the woofers). ...

Hi guys,

I picked up this vintage custom built 3-way JBL speaker thinking it would sound amazing, but after refoaming the woofers, hooked them up and the sound is so 'midrangey' and just sounds...

interested in a pair of waveguides myself. not biggest fan of the original beyma horn and don't like how it sounds horn-less!

Hi Dan,

How are your finding the MTM config now? Better than all previous setups?

As I currently have a pair of unused tpl-150h and well built 300L ported boxes, I'm tempted attain a pair of...

Seems like I've hijacked the thread, so I might as well keep going.

Thanks Joe. Yep, that is a photo of 4313B's '4345 diy' project. I'll attempt to do the same thing when building the...

Hi Joe,

Not started the build yet mate. I would be okay distancing the midhigh driver position slightly out to cater for future 244x driver? Not quite sure how big the 244x is.

The reality is...

Thanks mate. I sort of get it now.

I will try follow and build the bi-amped CC passive design as outlined in previous threads.

Probably need to first figure out what changes are needed to run...

what the?! that looks really complicated!? hrmmm.. okay now I'm really confused. lol :(

Hi guys,

Please excuse my ignorance, but if not wanting to cc the passive crossover is as simple as removing the dc battery and halving the cap value (which is a good thing?), what is the point...