Amcron DI-50A (c. 1976)
Little is documented about the Amcron DI-50A outside of a few period trade announcements. The record shows a professional power amplifier introduced around 1976 as a replacement for the earlier D150. Studio Sound (June 1976, p.97) called it “a logical follow-up to the world-beating DC300A.”
The DI-50A was DC-coupled throughout, which was notable for the era. It could drive loads as low as 1 ohm, handy for studio and live-sound work where difficult speaker loads were common. It delivered 200 watts per channel (presumably into 8 ohms, though period copy does not specify the measurement standard) and had a Stereo/Mono switch for bridging operation. The chassis was rack-mountable. In the UK it was offered for ex-stock delivery through professional audio distributors.
Beyond these details, surviving information is thin. No service manual, schematic, or comprehensive specification sheet has surfaced in the usual collector channels. It remains a lesser-known entry in the Amcron catalog, of interest primarily to dedicated Crown historians and those assembling a complete picture of the brand’s pro-audio output in the 1970s.
Known specifications (from period advertising):
- Type: Stereo power amplifier
- Power output: 200 watts per channel (measurement conditions unstated)
- Load capability: Drives into 1 ohm
- Circuit topology: DC-coupled throughout
- Controls: Stereo/Mono switch
- Mounting: Rack-mountable chassis
- Preceded by: D150
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