Fostex X-15 Multitracker

Used X-15 from Fostex. Good condition. See photos for cosmetic details. 6-month warranty.

Fostex X-15 Multitracker – portable 4-track cassette recorder and mixer

Fostex X-15 is a legendary portable multitrack recorder combining 4-track cassette recording with a built-in mixer. Designed for musicians on the move, it allows you to record, mix, and overdub ideas anywhere – powered by batteries or AC. Despite its small size, it delivers impressive sound quality thanks to Dolby B noise reduction and high-grade analog circuitry.

Compact, rugged and flexible

Measuring only 3" × 11.5" × 9" and weighing under 6.5 lbs including batteries, the X-15 is one of the most portable multitrackers ever made. It runs on a battery pack containing ten 1.5V cells or an external AC adapter (11–15V DC). Its tough black plastic chassis ensures durability for travel or studio use. A power LED indicates battery status, and a DC input on the rear allows mains operation or use with a forthcoming rechargeable pack.

Recording and sound quality

The X-15 records at the standard 1⅞ ips tape speed, supporting up to two simultaneous tracks. Despite this slower speed, it achieves an excellent 60dB signal-to-noise ratio thanks to built-in Dolby B Noise Reduction—better than many budget open-reel recorders. Crosstalk is rated at 40dB with a frequency response extending up to 12.5kHz. It’s the perfect tool for songwriters and solo musicians layering multiple instruments step by step.

Inputs and connectivity

Two front-panel mic inputs (¼", –50dBV) are complemented by dual line inputs (RCA –20dBV) and four individual tape outs for each track. Stereo main outputs (RCA –20dBV) and a ¼" stereo headphone output (8–40Ω) with level control are also included. A pitch control allows ±15% speed adjustment—ideal for tuning or creative effects. Two remote jacks support the optional Fostex 9060 foot controller for punch-in/out recording.

Controls and layout

The top panel hosts the cassette mechanism and 4-channel mixer. Each channel includes gain and pan knobs, a three-position Mic/Line/Remix selector, and individual faders. Two LED meters show levels from –20 to +6 VU. The transport section features Pause, Stop, Fast Forward, Rewind, Play, and Record. The Record button automatically engages Play for quick and simple operation, with LEDs clearly indicating recording status.

Specifications

• Type: 4-track cassette recorder and mixer
• Recording: Up to 2 tracks simultaneously
• Tape speed: 1⅞ ips (standard)
• Noise reduction: Dolby B Noise Reduction
• Signal-to-noise ratio: 60 dB
• Crosstalk: 40 dB
• Frequency response: Up to 12.5 kHz
• Inputs: 2× Mic (¼" –50 dBV), 2× Line (RCA –20 dBV)
• Outputs: 4× Tape Out (RCA –10 dBV), L/R Main Out (RCA –20 dBV), Headphones (¼" stereo, 8–40Ω)
• Pitch control: ±15%
• Power: 10 × 1.5V batteries or AC adapter (11–15V DC)
• Dimensions (W×D×H): 292 × 229 × 76 mm
• Weight: Approx. 2.9 kg (including batteries)
• Construction: Durable black plastic chassis

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