No problems or issues. I have the more recent Sparkos model and don't need two. It's like someone cleaned their glasses.
Numerous reviews: "Eigentact.
Exact Shipping weight to be determined after packing. Key Specifications of the Purifi 1ET400A Module:
Output Power: 425W @ 1% THD, 4Ω.
Output Current: Approximately 25A.
THD+N: <0.00017% (-116dB) @ 100W, 4Ω, 20-20kHz.
Dynamic Range: ~131dB(A).
Output Noise: ~11.5µV(A).
Gain: 12.8dB.
Output Impedance: <65µΩ @ 1kHz.
Efficiency: >94%.
Idle Losses: ~1.7W.
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