BOSS SD-1 Super OverDrive Guitar Effects Pedal

Boss SD-1 Super OverDrive — 40+ Years of Essential Tone

The Boss SD-1 Super OverDrive has been delivering genre-defining overdrive tones for over 40 years. Using Boss's proprietary asymmetrical clipping circuit, the SD-1 produces rich, creamy overdrive reminiscent of a cranked tube amp — warm, dynamic, and touch-sensitive. With fully analog circuitry and simple Level, Tone, and Drive controls, it's one of the most versatile and reliable overdrive pedals ever made.

Asymmetrical Clipping for Authentic Tube-Amp Tone

Boss pioneered the overdrive category with the OD-1 in 1977, using an innovative asymmetrical clipping circuit to mimic an overdriven tube amp. The SD-1 evolved from that design, adding an active tone control and low-end boost for fuller, more musical overdrive. The asymmetric circuit produces predominantly even-order harmonics — naturally warm, smooth, and responsive to your playing dynamics.

Versatile Controls for Any Playing Style

• Level — Adjusts output volume for seamless switching without changing tone character
• Tone — Shapes high-frequency response to sit clearly in any mix
• Drive — Dials in gain from mild breakup to singing, saturated leads

A Pedalboard Essential for Any Genre

The SD-1's organic, amp-like overdrive works across rock, blues, country, jazz, and beyond. Its dynamic response and touch-sensitive drive make it equally at home as a primary overdrive or as a booster in front of higher-gain amps and pedals — tightening bass response and focusing the midrange for a more defined, cutting tone.

Key Features

• Asymmetric clipping circuit for warm, natural tube-amp overdrive
• Fully analog circuitry
• Level, Tone, and Drive controls
• Dynamic, touch-sensitive response
• Stacks well with amps and other pedals for versatile gain staging
• Rugged compact metal chassis
• 9V battery or DC power supply (sold separately)
• Boss 5-year warranty

Specs

• Type: Overdrive
• Controls: Level, Tone, Drive
• Input: 1× 1/4" instrument
• Output: 1× 1/4" instrument
• Power: 9V DC (sold separately) or 9V battery
• Dimensions: 2.9" × 5.1" × 2.3"
• Weight: 1.2 lbs

Warranty: 5-year parts warranty; 90-day labor warranty. Check with Boss for full warranty details.