Yamaha P-2200
Two hundred conservative watts a side, a damping factor north of 300, and a front panel built like a road case. It ended up in more control rooms than it ever got credit for.
Overview
The P-2200 doesn't flinch at the number. Two hundred watts continuous per channel, both channels driven into 8 ohms, from 20 Hz to 20 kHz, with total harmonic distortion held under 0.05 percent — and Yamaha's own literature is careful to call those figures conservative. Intermodulation and THD typically measure below 0.01 percent at 150 watts, which means the amp is doing its cleanest work well before it runs out of headroom. Into a 4-ohm load it's said to deliver 350 watts sustained per channel, enough to reproduce the peaks that make studio monitoring honest. Recording-Engineer (1980, p.36) noted the P-2200's distortion at full rated power was low enough to be undetectable even to critical listeners — a claim that, coming from a period trade journal rather than a spec sheet, carried some weight.
The metering is what separates it from a hi-fi receiver with rack ears bolted on. The P-2200 carries peak-reading meters that span a full five decades - 50 dB of output level - with large illuminated faces marked in both dB and watts-into-8-ohms. The input attenuators are detented, log-linear, and marked in 22 calibrated dB steps. That makes setups repeatable: note a position, come back the next day, and land on the same level. Two channels or two separate amplifiers can be trimmed simultaneously.
The I/O is all pro. Each channel gets one male and one female XLR connector plus parallel phone jacks, so chaining to a second amp or patching to a mixer doesn't need adapters. A polarity switch lets the user choose pin 2 or pin 3 as hot, which covers both DIN/JIS and USA wiring practice. Outputs are 5-way binding posts that accept either direct-wired connections for permanent installs or high-current banana plugs. The amp is readily suited to monaural operation as well as 70-volt commercial distribution applications.
Inside, the build is about staying alive. It has large toroidal power transformers, multiple protection circuits, serviceable printed circuits, massive side-mounted heat sinks, and a fully vented chassis. Yamaha built the P-2200 to survive being left on all night in a disco or a live rig, and the company's advertising made that durability part of the pitch. The front panel controls are recessed to prevent damage or accidental setting changes, and the chassis is 19-inch standard rack mountable. Frequency response runs 20 Hz to 20 kHz at +0 dB/-0.5 dB. The damping factor is rated over 300 into 8 ohms from 20 Hz to 1 kHz, which is tight enough to keep low-frequency driver excursion under control and transfer power efficiently. Signal-to-noise is quoted at 110 dB.
The P-2200 had company in Yamaha's Professional Series. The P-2201 is identical except it drops the peak-reading meters, while the P-2100 and P-2050 differ primarily in rated power output and size. The company marketed the whole line on performance, reliability, and flexibility, and the P-2200 sat at the top of the range.
It showed up in serious places too. A UREI-sponsored listening comparison conducted in an actual control room included the Yamaha P-2200 among ten prominent power amplifiers, among them the Crown PSA-2, BGW 750B, and Studer A68. Engineer Olsen described a George Augspurger-designed monitoring system bi-amped with a pair of P-2200s, voiced with a White Instruments third-octave EQ, in the pages of Recording-Engineer. The Wally Heider Mobile Unit 2, a truck whose credits included Joni Mitchell's Miles of Aisles and Bob Dylan's Before the Flood, carried P-2200 power amplifiers with crossovers. When A-1 Audio shipped a system to Brazil, the BGWs went along because of their quick-change heat-sink assembly. The company kept a good number of P-2200s in stock, and the Yamahas stayed home.
For collectors and studio owners today, the P-2200 is a professional amplifier with the metering and input flexibility that hi-fi gear of the period rarely offered, and its conservative ratings mean it's rarely stressed in normal use. The trade-offs are the ones you'd expect from a rack-mount pro amp. It's heavy, it runs warm, and the recessed controls and 5-way binding posts are designed for installation rather than casual swapping. Anyone buying one should check the protection circuits and confirm the attenuator detents are still crisp, since those calibrated steps are the whole point of the front end. Original documentation, including the operation manual Yamaha once sold for six dollars by certified check, is worth tracking down.
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