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Yamaha P2350

Stereo Power Amplifier (1990)

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Yamaha P2350


Power output: 175 watts per channel into 8Ω (stereo), 500W into 8Ω (mono)

Frequency response: 10Hz to 50kHz

Total harmonic distortion: 0.1%

Damping factor: 100

Gain: 30 dB

Signal to noise ratio: 110dB

Dimensions: 480 x 143.5 x 435.2mm

Weight: 19kg

Year: 1990



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Reviewed Feb 01st, 2019 by shaman333

Cliff notes: A very well built, powerful, versatile professional amplifier that is also quite musical, and suitable for home stereo use.

Build: Built like a tank, what you need for a pro amp that will be packed up and constantly carted around for performances. It is full 2U sized amplifier and weights 45 lbs. The handles on the face place are quite large, this may be a problem if you rack mount the unit in a cabinet. The unit has a large transformer(around 800VA), 30,000 µF of filter capacitance in a basic 2 channel arrangement. The internal layout is simple, and well done. Each amplifier board is flanked by a large aluminum heat sink which are enclosed by the sheet metal cover. 2 fans behind the face plate cool the unit, exhausting out the rear. The cooling fans are always on and bump up to high speed over 70ºC. At idle the cooling fans are similar to a PC in noise. The heat sinks are large enough that the fans can be disconnected for home use. The unit was no doubt designed to be installed in a rack with other equipment that generates heat, when used by itself the p2350 can run full tilt wit the fans disconnected and not have thermal issues.

Connections: The P2350 amplifier has a basic layout on the back panel. Balanced inputs for each channel include 2 TRS connectors and one XLR. Outputs are one set of binding posts per channel. Stereo or mono operation is controlled with a switch on the back panel.

Power: Stated as 2 x 175W @ 8ohm, 2 x 250W @ 4ohm, and 500W Bridged Mono @ 8ohm. The amplifier in practice is significantly more powerful than these ratings. 4 Ohm stereo can easily exceed 300W per channel and the amp can be bridged into a 4 ohm load producing clean power well above it's 500W rating. I would suspect the larger version of this amp, the p2700 is also conservatively rated and capable of higher output as well.

Sound: Sound is quite good by any standard. Much better than one would expect from pro amp front the 1990's. Noise is acceptable for home use, a faint hiss can be heard if you put your ear right up to a tweeter, the hiss could no be heard in a quite room, only large very efficient speakers would cause a problem (as they would for a majority of amplifiers). The amp does not make any popping noises when powered on. Unsung balanced or unbalanced inputs did not seem to have an effect in my setup on sound. Musically the amp is good. Driving full range 2 way speakers it has good detail, good range with flat response, it is not dark, or bright, though the highs are quite well reproduced. It may be a bit lacking to some in the low midrange, but I am nit-picking here. I really does sound good. Is it audiophile quality... maybe not but still enjoyable to listen to on a variety of speakers. The amp works very well driving sub-woofers, it would be a good choice for DIY home theater or 2.1 music system subs and would put most plate amps (even the good ones) to absolute shame. The downside is that unlike may modern power amps the Yamaha is not meant for 2 ohm loads in bridged mode.



re: P2350

I just hooked up a Yamaha p2350 using the cheater XLR to RCA plugs and it seems like there is not a lot of volume,my Kenwood 125 watt amp is louder,what am I doing wrong,do I need to hook it up with the 1/4 jack,but don't know how to!!

re: P2350

I used use the 1/4” jacks with adapters like these:


Then you can connect conventional RCA cables to your preamp. Worked great for me. If it doesn’t I would suspect there is something wrong with the amp.

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