4004 II vs YBA Passion 600
The Passion 600's power @ 8ω is 150W against the 4004 II's 200W, its power @ 4ω 300W against 400W, its signal-to-noise 100 dB against 110 dB, and its thd 0.100% against 0.050%.
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Estimated price (community-sourced)
Around — community and catalog average, updates slowly
Designed by Dan D’Agostino under Mondial Designs, the Aragon 4004 MKII is an upgraded version of the original 4004 amplifier, featuring two separate mono amplifiers in a single chassis with high-efficiency toroidal power transformers. It delivers 200 watts per channel into 8 ohms and doubles power into 4 ohms, making it capable of driving almost any speaker with ease. The amplifier is praised for its neutrality, transparency, and muscle, producing lifelike realism with excellent bass control and a stable, detailed sound. It has a frequency response of 20Hz to 20kHz, total harmonic distortion of 0.05%, and a signal-to-noise ratio of 110dB. The unit is relatively compact and heavy, with dimensions of 19 x 6.5 x 14.5 inches and weighing 65 lbs. It remains highly respected and sought after in the second-hand market for audiophiles valuing power and sonic detail.
Amplification power output and characteristics
Analog signal output specifications
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 4004 II 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 Passion 600's power @ 8ω is 150W against the 4004 II's 200W, its power @ 4ω 300W against 400W, its signal-to-noise 100 dB against 110 dB, and its thd 0.100% against 0.050%.
The 4B-NRB's power @ 8ω is 250W against the 4004 II's 200W, its signal-to-noise 100 dB against 110 dB, and its thd 0.010% against 0.050%. Both share power @ 4ω (400W).
The KAV-2250's power @ 8ω is 250W against the 4004 II's 200W, its signal-to-noise 112 dB against 110 dB, its power @ 4ω 500W against 400W, and its thd 0.030% against 0.050%.
The NC 2250v2's power @ 8ω is 275W against the 4004 II's 200W, its signal-to-noise 114 dB against 110 dB, and its thd 0.020% against 0.050%. Both share power @ 4ω (400W).
Both turn up in the same documented systems.
Krell FPB-200c
Musical Fidelity A5
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