Boulder

Explore Boulder vintage audio equipment in the Vintage Technology Archive.

Models

1060 — Extremely scarce documentation on the Boulder 1060 stereo power amplifier. Known: 300wpc, 2-inch MDF/cherrywood cabinet, $18,500 list.

250 — Boulder 250 power amplifier: a robust early design from Boulder Amplifiers with 1,200W toroidal transformer and rentclamp protection.
250-AE — Boulder 250-AE power amplifier. No independent documentation exists; it was advertised as a variant of the Boulder 250. With production years.
500 — Boulder 500 power amplifier, 125 W/ch, early high-current design from Boulder Amplifiers, $995. Covers production dates.
500-AE — Boulder 500-AE integrated amplifier from the late 1990s, 120W/ch, zero-feedback Class-A, unique bias control, US$4,995. This page has production dates.

102 — Little is consistent about the Boulder 102 — it was either a waveform monitor/vectorscope ($695) or a 16-channel mixing console ($6,950.

EA-230 — Little-documented Boulder EA-230, a 30 W/ch power amplifier known from a 1988 HI-Fi-Stereo-Buyers directory listing. With production years.