This is an early Walter Woods–designed compact solid-state amplifier head, built in California in the late 1970s to early 1980s, known for delivering unusually high clean power from a very small enclosure.
Type
Solid-State Amplifier Head
Model
A.M.P. Mini Amp 2 (MI-100-4)
Manufacturer
Walter Woods / A.M.P. (Associated Music Products)
Country of Manufacture
United States (Van Nuys, California)
Era
Late 1970s – Early 1980s
Wattage
Approximately 100–120 watts RMS
(roughly ~75W at 8 ohms, up to ~120W at 4 ohms)
Controls
Input Volume, Master Volume, Lows (Bass), Middles (Midrange), Highs (Treble), “More / Same / Less” EQ switches for lows and highs
Input
Two 1/4" inputs (Loud / Instrument and Soft sensitivity)
Output
Dual 1/4" speaker outputs (minimum 4 ohms load)
Power Supply
Internal (115V AC, fixed power cable)
Notable Features
- Early ultra-compact high-power amplifier design (“mini amp” format)
- Handbuilt by Walter Woods, a pioneering boutique amp designer
- Designed primarily for upright bass and clean instrument amplification
- Extremely clean, hi-fi, high-headroom sound
- Discrete solid-state circuitry (FET-based preamp with solid-state power section)
- One of the earliest examples of high-power performance in a portable chassis
- Distinctive red anodized aluminum chassis with compact stacked construction
- Very low production numbers; considered rare and collectible
- Often associated with professional jazz and upright bass players for its clarity and portability