The writers for the DAK catalogs were masters! Every items they sold was described in a way that made me drool. The only thing I ever bought was a condenser microphone for $19.95 which the ad told me fooled an experienced audio engineer who thought that surely the sound was being produced by a much more expensive microphone. It sounded like crap for almost everything, with the exception of the one time I was short of microphones and used it to mic a hi-hat out of desperation. That actually sounded OK.
I loved some of that DAK stuff. And those DAK ads were the absolute best audio propaganda snake oil anyone's ever written. You could read those ads and come away thinking that those components weren't going to just play audio, they were going to be revolutionary!. Those ads probably took food off Quad Linda's table in terms of lost sales back when she was selling audio equipment.
I had top end equipment during the golden stereo age... Audio Research, Magnepan, Dahlquist, Martin-Logan, Threshold.... That was for serious listening.
But the DAK stuff.... that was for playing around.
I bought a digital delay unit made by ADC (IIRC) and sold by DAK. That thing was way cool. You could connect it to a set of pre-outs so it didn't pollute the front mains (it's a purist kinda thing). It produced a stereo rear signal that was blended, delayed and frequency shaped, most of which was adjustable. I ceiling mounted small Definitive Technology Bipolar satellites behind the sweet spot to use with it. You could play music and have it sound like it was bouncing off a mountain. It could produce serious echo... echo you would never use while playing music, but it could impress anyone who heard it. At lower levels of delay and volume it did a remarkable job of creating ambience, and I often used it while listening to the main system. Not was not discreet in any way. And if you could tell you had it on, you had it playing too loud. But if you shut the rears down, it was the oft quoted "night and day" (which oddly enough, I just quoted again).
In a world without quad, that's as close as I could get to a satisfying experience from stereo. It was an early digital product, and the resolution was pretty poor, and you wouldn't want to have to listen to the rear channels isolated. But set properly with the delay bouncing around the cathedral ceiling from a set of mini bipoles, it was audio heaven for a while.
I also bought a stereo graphic equalizer/spectrum analyzer that was badged as BSR and sold by DAK. It was the twin to an identical ADC badged unit they had previously sold (I believe BSR had purchased ADC around that the time). It had an LCD display that could be adjusted for response time and set to hold peaks. If you plugged the "calibrated condenser" microphone in and adjusted the equalizer to give flat response based in the spectrum analyzer, you got a terribly bright unnatural sound. But used more judiciously, it did clean up some pretty sad sounding rock records of the day, and in that respect, it earned its keep in the rack.
That DAK gear was way, way cool.