Eventide BD932
A stereo broadcast delay built to keep talk radio clean - and to make tape loops obsolete.
Overview
The BD932 was never a studio toy. It is a stereo broadcast audio delay - an "obscenity delay," in the blunt trade language of the day. It sits in a station's signal chain and gives the operator a few seconds of buffer to dump whatever shouldn't go out over the air. Eventide's own promotional material framed the BD931/BD932 series as the "no compromise" economy delays, sold as a low-cost alternative to the tape-loop systems that had been the standard and were, by every account, trouble-prone. The pitch was straightforward: RAM-based digital circuitry eliminates the problems of tape loop delays.
This is a fixed-delay unit, not a variable one. Stations bought it in one of two configurations, 3.2 seconds or 6.4 seconds, and that was the delay they got. Eventide's advertising listed the stereo BD932 at $2,595 for the 3.2-second version and $4,495 for the 6.4-second version. A distributor listing quoted those as manufacturer's suggested list prices with "call for the Allied price" beneath them. The mono sibling, the BD931, came in at $1,795 and $2,295 for the same two delay lengths. It was meant for a station airing only limited talk programming, a worthy low-cost alternative rather than the flagship.
The specs Eventide published were respectable for the money. Frequency response ran 40 Hz to 16 kHz, ±1 dB. Dynamic range was quoted at greater than 90 dB, and distortion at less than 0.2% at 1 kHz and 100 Hz. A distributor's spec block simply lists "16 kHz bandwidth" as the headline. That is a hard ceiling by audiophile standards, but for broadcast speech it was more than enough. The goal was to beat the tape loops on noise and reliability, not to win a listening test.
Studio Sound (August 1982, p.24) covered the launch, noting that the BD931 and BD932 made their debut at NAB as low-cost alternatives to tape loop delay systems, available with either 3.2 or 6.4 seconds of fixed delay and using circuitry built around 64Kbyte RAM chips. The same report confirmed the greater-than-90 dB dynamic range and the 16 kHz bandwidth. That's the contemporaneous record: a practical broadcast tool, announced as such, priced as such.
The BD932 is not a creative delay, and this is where collectors and studios get tripped up. There is no modulation, no feedback control, no tap tempo, nothing of the sort documented for this unit. It is a fixed buffer for a specific job. The BD955, Eventide's own best-seller in the category, carried a patented auto catch-up feature that automatically rebuilt the delay after objectionable material was dumped. The BD931/932 launch material positions the new series beneath the BD955 rather than as a replacement for it. Anyone who wants the catch-up behavior is pointed at the BD955, not this.
The catch for anyone buying one today is the same one that applied in 1982: a fixed 3.2 or 6.4 seconds is a fixed 3.2 or 6.4 seconds. There is no way to dial it shorter for a tight music bed or stretch it for a long interview. Broadcast facilities bought these to solve one problem, and they solved it. In a modern studio it is a piece of Eventide broadcast history, a stereo digital delay with clean conversion for its era, and it does exactly one thing. Whether the RAM chips in a given unit are still healthy after four decades is the question any buyer should ask before powering one up. The documentation available here doesn't answer it.
Pricing on the secondary market isn't documented in the sources available for this page, and neither are production years or unit weights. What is documented is the original list price structure and the engineering brief.
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