Antares 300 BXLS

About the Antares 300 BXLS

The KR Audio Antares 300 BXLS is a high-power, dual-mono, single-ended triode vacuum-tube power amplifier operating in pure Class A. It uses KR Audio 300BXLS output tubes, a high-voltage version of the 300B designed to produce substantially more power than a conventional 300B when operated in a suitably engineered circuit. Published information identifies approximately 14 watts RMS per channel, with zero negative feedback and a bandwidth extending from 12 Hz to 35 kHz. The amplifier is a very large, heavy design intended for high-efficiency loudspeakers. The available documentation and contemporary review material do not provide complete details for every item commonly specified today, such as THD at rated output, damping factor, channel separation, signal-to-noise ratio, or exact input/output connector details. Manufacturing status is difficult to verify from current authoritative sources; the original Antares 300 BXLS appears to be a discontinued or no-longer-current model, although KR Audio 300BXLS tubes have been offered separately by some specialist dealers.