RMAF2007 Photos

[Lynn Olson]

First Watt (Nelson Pass design) OB Lowther. Bi-amplified with a 75 Hz active crossover between the 10" Scan-Speak woofers and the PM6A Lowther.

[Lynn Olson]

Back of Emerald Physics OB Speaker. Not much to photograph since all of the front is covered in stretchy grill cloth except for the waveguide - and it's black too. They use stretchy grill cloth on the rear too, giving an interesting effect stretched over the two magnets of the 15" bass drivers.

[Lynn Olson]

Cogent Field Coil all horn system. Note the 60's-vintage Ionovac tweeter on the right side of the bass horn.

[Lynn Olson]

The Teres 75TL-based DHT transmitter-tube amplifier that powered the Cogent speakers in the RMAF ballroom. These 75TL designs are popular here in Colorado - I know two other folks using variations of this amplifier.

[arend-jan]

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[Lynn Olson]

The power supply for Steve K's 75TL amplifier - he's one of the other Colorado hifi fans that built this transmitter-tube DHT amplifier. You can see why I'd rather photograph amplifiers instead of boring old loudspeakers.

Oh yes, it sounds good - very very good. I was listening to Steve's system on Tuesday, and it sounded better than anything at the show. Top quality throughout, and wonderful sound.

[Lynn Olson]

Alexander of RAAL, coming all the way over from Serbia to visit us here in the States. Here he's in an animated conversation with John Atwood (next picture).

[Lynn Olson]

John Atwood, co-founder of Vacuum Tube Valley magazine and blogmaster of the ClariSonus blog. Worth a visit, by the way - lots of good photos of John's recent trip to Thailand and Vietnam.

[SY]

Originally posted by Lynn Olson
Alexander of RAAL, coming all the way over from Serbia to visit us here in the States.

We get him next.

[Lynn Olson]

The AudioKinesis system, with front and rear-facing 11" TAD drivers, and front and rear-facing waveguides with Beyma CP380 compression drivers. The rear-facing HF driver has its own independent crossover (not shared with the front driver) - the rear crossover uses a highpass filter contour designed to minimize radiation from the rear diffracting around to the front.

In all the uproar about the Feastrex, I personally think the AudioKinesis is a better choice for those of us who like full-scale symphonic, choral, and rock music. Much more headroom, and superb tonal balance - a rarity at this year's show.