Yamaha REV5
A rack reverb whose "ROOM 3" preset earned a permanent slot in studios that never bought a dedicated reverb box.
Overview
The REV5's parameters are adjustable, not fixed. Reverb time on the ROOM 3 program can be pushed from 0.1 seconds all the way to 480 seconds. That is absurd for a room simulation. The ER/REV balance sits at a 73% preset, so most of the output is wet reverb rather than early reflections. That is unusual for a room program, and it gives the effect more of a "surround" sound than a naturalistic one. Density on the ROOM 3 preset is fixed at 4 on a 0-4 scale, which is maximum. The ROOM 2 program sits at 9 on a 0-10 scale.
The REV5 wasn't sold as a standalone flagship. The reverb programs - HALL, HALL&GATE, ROOM 1, ROOM 2, ROOM 3, VOCAL 1, VOCAL 2, PLATE, PLATE&GATE - appear in Yamaha's SPX900 manual as factory presets. That suggests the REV5's algorithms were shared across the company's effects lineup. Yamaha has a long history of using the same DSP across product tiers. Anyone who knows the SPX900 will recognize the REV5's presets right away.
The parameter set is deeper than the preset names suggest. Beyond reverb time and diffusion, the ROOM 3 program exposes initial delay (0.1–200 ms), high-pass filter frequency (adjustable, with the preset set to THRU), low-pass filter frequency (preset at 10 kHz), ER/REV balance (0–100%), reverb delay (0.1–100 ms), density (0–4), trigger level (0–100), trigger delay (−100 to +100 ms), hold time (1–24,000 ms), release time (3–24,000 ms), and MIDI trigger on/off. There's also a full EQ section with low and high shelving/peaking options, low frequency (32 Hz–2.2 kHz), low gain (±15 dB), high frequency (500 Hz–16 kHz), high gain (±15 dB), and high Q (0.1–5.0). Balance (0–100%) and output level (0–200%) round out the controls. The preset output level is 130%, which is a hint that the REV5 runs a little hot — or that Yamaha expected users to want extra headroom for quiet sources.
For anyone putting the REV5 into a modern setup, the MIDI side is simple. The unit supports MIDI program change, MIDI control assignment, and bulk data transfer. The hold and release parameters extend to 24 seconds in each direction. Those are the controls you'd want for gated or triggered effects, and the "TRIGGERED PAN" program in the broader Yamaha preset list confirms the platform was used for more than ambience.
Sound on Sound (March 1997, p.86) reviewed the Yamaha REV500 — a later, related unit — and noted that the modest £399 price tag on Yamaha's latest dedicated reverb processor belies its quality, describing it as offering strong value for money. That review is about the REV500, not the REV5, but the sentiment applies to the lineage: Yamaha's reverb boxes have consistently punched above their price class. The REV5 sits earlier in that lineage, and its preset architecture — 50 read-only factory programs plus user-writable locations in the broader SPX900 platform — reflects an era when digital reverb was still a significant investment and manufacturers packed every parameter they could into the box.
Based on available documentation, the REV5 has no clear standalone identity in the collector market. It's not a Lexicon PCM-70 or an AMS RMX-16, and it doesn't command the prices those units do. It's a working tool, the kind of reverb that ended up in project studios and live rigs because it did the job without fuss. The ROOM 3 preset, with its 0.7-second decay and maximum density, is the sound that kept it in those racks.
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