So perusing the new KB line from MCM got me interested in some of the smaller diameter models, the 5" in particular
. It looks like it has an underhung coil which, with the copper cap, should provide a very nice distortion profile.
On the other hand, advertised Qts is fairly high and the gap is fairly short, which might limit it to pure midrange or fairly limited extension usage - so...
When I read the ad-copy, I feel they are targeting Dayton's Reference series and what I see is an improved basket (the Dayton's lack under spider venting), copper in the motor (on the RS180 at least, there is no copper - the only shorting device is the phase plug itself), and of course the underhung voice coil - although I have heard compelling arguments in both directions for the benefits/drawbacks of such a thing. For now, I'll just ask this question:
"Do you think this driver has the potential to be a high end midrange in a large 3-way?"
I love the Taiga tower speakers, listen to them every day in fact, but I feel the itch for a new set of towers building up - and a thread over at "the other place" started by someone who really has issues with understanding certain aspects of DIY and associated costing got me to thinking...
This particular driver has an impressively flat impedance profile, and although at first blush the response curve looks goofy that broad depression between ~400 and ~1500 will actually be a benefit when installed in a cabinet. Within the expected pass band, the response is smooth - if not flat.
Rumor has it that the KB series is showing up at MCM today - so sometime next week I will have a pair of the 3" and a pair of the 6.5" in-hand and will do some testing. The 6.5" are not mine to keep, but if the testing goes well I will purchase a pair of the 5" and test those.
For the proposed (purely theoretical at the moment) high-end, ignore individual driver cost and focus on performance 3-way I think the best tweeter choice will be the Viawave ribbon, or if something cooler comes out in the meantime along the lines of ribbon drivers - I'll use those. I have been listening to the RS28A this week, and although it is a kickass tweeter - I guess I just prefer ribbons these days. There, I said it.
For shoring up the bottom end - I will wait for results on the 6.5". If the T/S indicate reasonable extension (under 45Hz F3) and the advertised 7.5mm Xmax holds up under scrutiny they should offer some serious bang for the buck performance as well. Bonus is that the overall footprint and aesthetics would probably end up very similar to Taiga (although Taiga has an F3 of 33Hz).
Geoff, I would once again like to thank you for steering MCM in this direction. PE is a great company, but they have stood alone for too long in the world of in-house branded, high value drivers. I love having options in these price ranges.
I have a signature.