Maintained in August 2025. The 606 is thick and unimaginable from its compact exterior. The good sound unique to QUAD allows you to enjoy not only classical music, but also jazz vocals in a mild way. The high level of musicality that makes you enjoy the music with a pleasant tone stands out. Overall there is dullness (Oikawa Tetsuji)
Maintenance information: 2026.5.20 Operation confirmed
2025.8.24 Maintained (±b bypass c in both CH boards, gain setting C replacement Lch power stage Tn x 1, poor characteristics → replacement
Operation test)
Accessories: power cable, copy of instruction manual
Main specifications: output 140W+140W (8Ω) frequency characteristics 20Hz to 20kHz (-0.5dB) 13Hz to 40kHz (-1.0dB) total harmonic distortion ratio 0.01% or less (up to 130W 100Hz/1kHz) input sensitivity 0.5V input impedance approx. 20kΩ crosstalk 100dB (100Hz) 85dB (1kHz) 65dB (10kHz) S/N ratio 105 dB speaker minimum load 4 Ω external shape Dimensions W321 x H134 x D240 mm Weight 12 kg