Boss CS-1 Compression Sustainer

The Boss CS-1 Compression Sustainer, released in 1978, was Boss's first compact compressor pedal and a pioneer in their now-famous line of effects. Produced until 1982, the Boss CS-1 is notable for its optical compression circuit, which sets it apart from its successors (CS-2 and CS-3) that use voltage-controlled amplifiers (VCAs). The Boss CS-1 delivers a highly "squishy" and pronounced compression effect, making it ideal for funk, slide guitar, and other styles requiring dynamic control with noticeable tonal color. Its simple controls—Level, Sustain, and a Normal/Treble toggle switch—provide straightforward operation while offering unique tonal flexibility.

Historical Development

• Design: The Boss CS-1 uses photocouplers for its compression, resulting in a slower attack and release compared to later models. This gives it a distinct "blooming" effect after the initial note attack.
• Production: Manufactured in Japan from 1978 to 1982, it was succeeded by the CS-2, which introduced faster attack times and a more transparent sound.
• Legacy: Although discontinued, the Boss CS-1 remains sought after by collectors and players for its vintage tone and unique compression character.

Notable Players

• Lowell George (Little Feat): Known for his slide guitar work, the Boss CS-1's pronounced sustain and tonal bloom were well-suited to his style.
• Funk Guitarists: The pedal's squishy compression makes it ideal for tight rhythm playing in funk and disco genres.

Popular Settings

The Boss CS-1 is known for its bold compression and tonal shaping:

• Funk Rhythm: Sustain at 9:00–10:00, Level at max, Normal mode engaged for tight, percussive tones.
• Slide Guitar: Sustain at 2:00–3:00, Level at max, Treble mode for added brightness and sustain.
• Dynamic Bloom: Sustain at 12:00, Level at max, Normal mode for a balanced blend of compression and natural dynamics.

Legacy

The Boss CS-1 Compression Sustainer holds a special place in effects history as Boss's first compact compressor. Its distinctive optical circuit offers a unique tonal character that remains unmatched by later models. Though not subtle or transparent like modern compressors, its exaggerated compression has made it a favorite among funk players and vintage gear enthusiasts. Today, it is valued as a collector's item and as a tool for achieving retro-inspired tones.