Boulder 250-AE
No documentation has been found that describes the Boulder 250-AE as its own model with its own specifications, design details, or production history. The name shows up in period advertising. An Audio (January 1989, p.7) advertisement listed a "250AE" variant alongside Boulder's other amplifiers. No review, manual, or equipment directory in the available sources gives separate technical data for the 250-AE.
Going by the naming, the 250-AE was almost certainly a version of the Boulder 250 power amplifier. Mix Magazine (November 1988, p.214) documented the standard 250 as a rack-mountable design with a black anodized aluminum chassis, stainless steel hardware, and Boulder's "rentclamp" protection circuit. Sound-and-Communication (June 1986, p.47) reported that the 250 used a 1,200 watt toroidal transformer and four filter capacitors, with a closed-loop bandwidth of 200 kHz and gold-plated five-way binding posts. No source examined records whether the "AE" suffix meant an updated circuit, cosmetic changes, or a special edition.
Until a period review or factory document turns up that addresses the 250-AE directly, its exact place in Boulder's lineup is uncertain. Collectors who come across examples are encouraged to share photographs and serial-number information.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.