Waveguides and horns

[Ed LaFontaine]

DIY Sound Group is based in the US. They source those through connections on the European continent. I think jzagaja can put you on a more "direct" path.

[jzagaja]

Exactly, can be ordered directly from Horns
Autotech has short holidays for a couple of days and will be closed as usual in August.

[maravedis]

thanks, I've emailed them directly.

[jzagaja]

Now it's been three years that I know Autotech, small anniversary Bellow evolution of Mummy (winter 2010).

[phusis]

Originally Posted by jzagaja

Now it's been three years that I know Autotech, small anniversary Bellow evolution of Mummy (winter 2010).

Congrats, Jack I started out my Mummy adventure in March last year, being the first official customer of Mummy v1(STX units) in Denmark, going on to replace them in January this year with BMS/Beyma equipped Mummy v2(also first customer).

Now, let's see if Mummy v3 can up the ante of the bar set indeed quite high by the v2's, although the v3's will have to do damn well - inasmuch I'll be able to assess your impressions of them to begin with, having something to go by - if they're to push down the v2's of their pedestal.

I find it hard to believe the B&C DE500(of v3, if it remains) can top the BMS 4524(of v2) - the latter is really that good; just extremely resolved, dynamic, relaxed, natural, and full/organic. I can't really find anything to complain about with this unit's handling of its entire frequency spectrum(~1.5-20>kHz). And the more I've been playing music through the v2's the better they slowly continue to be.

It's the 12B100/R(of v3) that puts the sweat on my forehead(combined with the lower cross-over to the DE500). The 12BR70(of v2), despite the high-ish cross-over of ~1.5kHz, mates very smoothly with the 4524, possessing a nicely balanced, deep when called for, natural, and agile sonic quality. Bass notes are easily followed through the deep/central to upper areas, maintaining their character, and the lower to central mids are noteworthy of being of a slightly though pleasantly warm, present, and full nature - bereft perhaps subtly of some minute detail here. It's in this rather vital area particularly, the lower to central mids, that I suspect the very low distortion 12B100/R unit(again, combined with the lower cross-over) could better the v2's. Moreover, how does the more powerful magnet and larger voicecoil(4" vs 2") translate with regard to bass reproduction? The 12BR70 is no slouch and can pound away very tightly with great detail and information, but the 12B100/R is a mean "schallmaschine," as the Germans say.

Time will tell - do let us know, Jack, how you think the v3's perform once they're up and running...

[virious]

Has anyone bought the biradial-2 horn? I would like to see in real life instead of just drawings.

Can't find any pricing on this either.

Jeppe,
Denmark

[jzagaja]

In two weeks I'll get a bunch of new horns including Biradial. Autotech will exhibit at HiFi Show in London (September).

[jzagaja]

An example of measuring jig inside 1U rack housing (ABS), Intel DN2800MT board, M-Audio Transit soundcard and LM3886 amp (PM-40C). Remotely controlled via Ipad. Later I will add USB rotating table. Impedance plot of AFR 85mm unit.

[ssangste]

are you still going to do a fiberglass version of the SEOS horn in 24" or larger with 1.5" or 2" throat?

I've got a bunch of JBL 2446 and 2447 CDs sitting around waiting on some good waveguides to use with them

I'm not convinced the JBL specific horns I have are the best options. I'd like some big SEOS options... might even have to try one of those Iwatas as well...

[jzagaja]

Yes I do just after Hifi Show in London means an October. We just need agree on throat angle. Current status: SEOS-24-1,5" has 14deg.