SE84UFO vs Quicksilver Audio Headphone Amp
The Headphone Amp's power @ 8ω is 2W against the SE84UFO's 2.3W, its thd 0.010% against 2.240%, and its input sensitivity 1.0V RMS against 1.9V RMS. Both share input impedance (100Ω).
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Estimated price (community-sourced)
Around — community and catalog average, updates slowly
The Decware SE84UFO is a minimalist, high-end Zen Triode amplifier designed by Steve Deckert and hand-built in the USA. It features a very simple audio circuit with only two resistors and one capacitor, no circuit boards, and zero negative feedback, resulting in a pure and transparent sound. The amplifier delivers 2.3 watts RMS per channel into 8 ohms and can handle speaker loads down to 1 ohm. It uses EL84 or 6P15P-EV output tubes and a 6922/6N1P input tube, with a 5U4 rectifier tube. The UFO output transformers are highly interleaved for ultra-fidelity and wide bandwidth. The SE84UFO is self-biasing and self-balancing, requiring minimal maintenance other than tube replacement every few years. It has a frequency response from 20 Hz to 80 kHz, input sensitivity of about 1.8 to 2 volts, and a power consumption of 65 watts. The amplifier weighs 17 lbs and measures 8.0" H x 6.125" W x 12.0" D. It comes with a lifetime warranty to the original owner and offers various customization options including wood bases and knob types. The SE84UFO has undergone 7 revisions over 16 years, reflecting continuous improvements based on customer feedback.
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Size, weight, and appearance
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 SE84UFO 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 Headphone Amp's power @ 8ω is 2W against the SE84UFO's 2.3W, its thd 0.010% against 2.240%, and its input sensitivity 1.0V RMS against 1.9V RMS. Both share input impedance (100Ω).
The Mark IV's power @ 8ω is 40W against the SE84UFO's 2.3W, its signal-to-noise 90 dB against 79 dB, its thd 1.000% against 2.240%, and its input impedance 470Ω against 100Ω.
The SE84UFO2's width is 203.2 mm against the SE84UFO's 155.575 mm and its depth 406.4 mm against 304.8 mm. Both share power @ 8ω (2.3W) and height (203.2 mm).
The Mark III's power @ 8ω is 60W against the SE84UFO's 2.3W, its signal-to-noise 90 dB against 79 dB, its thd 1.000% against 2.240%, and its input sensitivity 1.5V RMS against 1.9V RMS.
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