Leak TL-50
Little is documented about the Leak TL-50 under this exact name. The period record calls the model the TL/50 Plus. It appears to have been Leak's top-rated power amplifier in the 1957 "Plus" series, alongside the TL/12 Plus and TL/25 Plus.
Audio (October 1957, p.4) explained the "Plus" designation. The amplifier was rated at 50 watts because that was the point where harmonic distortion reached 0.1% at 1000 cycles. It could deliver as much as 64 watts with what the magazine called negligible distortion.
Beyond these basics, the record thins out fast. The amplifier appeared in Leak's "Point One" distortion-guarantee advertising alongside the Varislope III preamplifier. No service manual, production run details, or later reviews have surfaced in the Archive.
Known Specifications (from period sources)
- Rated power output: 50 watts at 0.1% THD (1 kHz)
- Maximum output: ~64 watts with negligible distortion
- US price (1957): $149.00
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