Type of construction: 2 1/2-way bass reflex, Floorstanding speaker
Chassis:
Woofer: 1x 170 mm cone
Woofer: 1x 170 mm cone
Tweeter: 1x 25 mm cone
Power handling (nominal/music): 160 / 320 watts
Efficiency: 92 dB/2.8V /1m
Frequency response: 22 - 55,000 Hz
Cut-off frequencies: 350 / 3,300 Hz
Impedance: 4 - 8 ohms
Woofer: 1x 170 mm cone
Woofer: 1x 170 mm cone
Tweeter: 1x 25 mm cone
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Quantum 551
Quantum 553
Quantum 555
Quantum 557
Quantum Center 51
Quantum Center 53
Stereo Issue 12/2009; 2nd place out of 5: Sound level: 47%
Price/performance: "excellent" (4 out of 5 stars)
"The Quantum 555 would have won the test victory by a hair with a balanced temperament and the deepest, best bass in the field. It is an extremely universal, well reproducing and long-term suitable loudspeaker with party-suitable 'Taker qualities'."
Price/performance: "excellent" (4 out of 5 stars)
"The Quantum 555 would have won the test victory by a hair with a balanced temperament and the deepest, best bass in the field. It is an extremely universal, well reproducing and long-term suitable loudspeaker with party-suitable 'Taker qualities'."