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Estimated price (community-sourced)
Around — community and catalog average, updates slowly
The Decware ZMA-Zen Mystery amplifier is a dual-mono push-pull Class-A tube amplifier using two KT66 tubes per channel to produce 40 watts per channel without negative feedback, ensuring unrestricted imaging and soundstage depth. It features a 20-position stepped attenuator and uses Russian military grade 6N23P input tubes with gold grids, which can be swapped for 6N1P or 6922 tubes. Voltage regulation is handled by OA3 tubes with a fast recovery solid-state rectifier. The amplifier is designed as two mono amps in a single chassis, maintaining high quality and performance similar to Decware's Zen TORII monoblocks but at a reduced cost. It has massive power supply capacitors (about 40 times larger than typical amps of its size), providing clean, battery-like power for exceptional liquidity and accuracy in sound reproduction. The ZMA includes bias and balance controls for each tube pair, allowing quick and precise tube matching and clipping indication. Inputs include single-ended RCA jacks with optional Jensen transformer balanced XLR inputs. The amplifier is known for its super quiet operation, reliability, and musical naturalness, with a warm-up period that transitions gradually. It comes with a lifetime warranty and is highly regarded for its value and sonic performance. The amplifier ships with a padded Pelican case and includes a power cord. It supports speakers with impedance options for 4, 8, or optionally 16 ohms. The ZMA is recommended for speakers with sensitivity above 86-87 dB and is praised for its musical purity and detailed soundstage.
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
Components that show up alongside the ZMA Zen Mystery in real systems. A verdict means the pair has been checked for compatibility and headroom — open it to see how the two get along.
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The 502P's power @ 8ω is 50W against the ZMA Zen Mystery's 40W and its class AB against A. Both share input sensitivity (2.0V RMS).
The Mark IV's output voltage is 1.3V RMS against the ZMA Zen Mystery's 2.0V RMS, its input sensitivity 1.3V RMS against 2.0V RMS, and its class AB against A. Both share power @ 8ω (40W).
The Mark III's power @ 8ω is 60W against the ZMA Zen Mystery's 40W, its output voltage 1.6V RMS against 2.0V RMS, its input sensitivity 1.5V RMS against 2.0V RMS, and its class Tube against A.
The SE84UFO2.1's power @ 8ω is 2.3W against the ZMA Zen Mystery's 40W, its output voltage 2.3V RMS against 2.0V RMS, and its input sensitivity 1.5V RMS against 2.0V RMS. Both share class (A).
Both turn up in the same documented systems.
Krell KAV-150a
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