KAWAI SX-240

Introduction

The Kawai SX-240 is an eight voice, fully programmable polyphonic analog synthesizer released in 1984 as a follow-up to the Kawai SX-210. It was manufactured by Kawai but originally released under the Teisco brand-name in Japan when Kawai bought out Teisco.

Key Specifications

• Manufacturer: Kawai
• Release Year: 1984
• Type: Analog Synthesizer
• Polyphony: 8 voices
• Oscillators: 2 analog DCOs and 1 sub-oscillator per voice
• Filter: SSM 2044 filter chips (8 in total)

Unique Features

• Voice Modes: Poly-8, Poly-4, and Mono
• Mono Mode: Ability to stack all 24 oscillators for an extremely powerful sound
• Ensemble Effect: Built-in chorus effect
• Brass Function: Actually a ring-mod effect
• Split/Dual Modes: Allows for keyboard splits or layered sounds
• Sequencer: Built-in real-time 1,500 note sequencer
• Chord Memory: Allows storing and recalling chord voicings

Interface and Controls

The SX-240 uses a data-wheel for editing parameter values, similar to the Roland Alpha Juno or Moog Source. Four scroll buttons allow selection of parameters to edit, with LED lights indicating the current parameter.

Sound Characteristics

The SX-240 is known for its big, wide, and full analog sound. It excels at leads, basses, brass, drones, pads, and strings, each with a unique analog character. The Ensemble effect adds warmth and fluidity to strings and pads.

MIDI Implementation

Being among the first synthesizers in the MIDI era, the SX-240’s MIDI implementation is basic, receiving on all channels.

Historical Context

The SX-240 entered the market during the digital revolution, competing with instruments like the Korg Polysix and Roland Juno 6/60. Despite its capabilities, it didn’t receive much attention due to poor marketing.

Legacy and Current Status

Today, the SX-240 is considered rare. Many second-hand units face issues with NI-Cad batteries, affecting patch memory retention. It’s often described as sitting somewhere between the Polysix and Juno 6/60 in terms of sound, though it has its own unique analog character.

Conclusion

The Kawai SX-240 represents a unique entry in the world of analog synthesizers, offering a powerful and versatile sound engine with innovative features for its time. Despite its limited commercial success, it remains an interesting and capable instrument for analog synthesis enthusiasts.