Mark Levinson 10A
Little is documented about the Mark Levinson 10A on its own. What survives is an equipment profile in Audio (August 1985, p.62), which treated the 10A preamplifier and the ML-9 amplifier as a pair. According to that review, the two sat about midway in the Mark Levinson Audio Systems (MLAS) hierarchy. The 10A was a departure for the company. Earlier MLAS preamps used separate outboard power supplies, but the 10A's supply was built into the chassis.
The review's measured figures: phono gain switchable between 42, 53, and 63 dB, and line gain of 22 dB. Distortion was measured at 0.014% THD and 0.005% IM on phono, and 0.004% THD and 0.004% IM on line, both at 6 V output, 20 Hz-20 kHz. Listening impressions of the 10A were done through an Acrosound tube amplifier driving Stax headphones. They found definition very good and bass quality and extension outstanding. The note on "air" and spatiality is cut off in the surviving scan. The same review praised the companion ML-9 amplifier as smooth, detailed, and spacious.
That is essentially the whole record. No production years, original price, or further design details are documented.
Known specs from the Audio profile:
- Preamplifier (Mark Levinson Audio Systems)
- Phono gain: 42, 53, or 63 dB, switch-selectable
- Line gain: 22 dB
- Phono distortion: 0.014% THD, 0.005% IM at 6 V out
- Line distortion: 0.004% THD, 0.004% IM at 6 V out
- Power supply built into chassis (departure from earlier MLAS preamps)
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