The Yamaha PSS-270 (released in 1986) is a classic portable FM synthesizer from the Portasound family. It features 49 mini keys, 9-note polyphony, and a 2-operator FM synthesis chip (YM2413). It comes equipped with 100 preset voices, 10 rhythm styles, and auto-accompaniment.

A full rundown of the technical and physical specifications for the Yamaha PSS-270 includes:

Synthesis Engine: 2-operator FM (Frequency Modulation) driven by the Yamaha YM2413 chip.

Polyphony: 9 voices.

Keyboard: 49 mini-keys (non-velocity sensitive).

Sounds: 100 preset FM voices (including piano, brass, strings, and experimental/effect sounds).

Accompaniment & Rhythms: 10 built-in rhythm styles (e.g., 8-Beat, Samba, Bossa Nova, March) with single-finger Auto Bass Chord.

Effects: Stereo Symphonic (widens the stereo field), sustain, vibrato, and portamento.

Audio Outputs: Built-in stereo speakers (1.3 W per channel), 1/4" or 3.5 mm headphone jack, and dedicated stereo RCA Line-Outs.

Power: Runs on 6 x "AA" batteries (1.5V) or an external Yamaha PA-1 style power adapter.

Dimensions & Weight: 622 mm × 213 mm × 72 mm.

Weight: 2.3 kg (without batteries).

[Condition]

Used( very good / perfect working condition )

This unit was checked by professional technician.

with 100-240V power supply

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