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Pairing Eltax Liberty 5+ with Yamaha A-S500 - Any risks?


New member
Jun 7, 2013
Hello from a beginner!

I have a pair of 6 years old Eltax Liberty 5+ and I would like to connect them to a Yamaha A-S500. The specs of the 2 devices are the following:

Yamaha A-S500:

Minimum RMS Output Power

(8 ohms, 20 Hz-20 kHz, 0.019% THD): 85 W + 85 W

(6 ohms, 20 Hz-20 kHz, 0.038% THD): 100 W + 100 W

Maximum Power (4 ohms, 1kHz, 0.7% THD): 120 W + 120 W

High Dynamic Power/Channel (IHF) (8/6/4/2 ohms): 130/150/185/220 W

Total Harmonic Distortion (CD to Sp Out, 20 Hz-20 kHz): 0.015% (42.5 W/8 ohms)

Eltax Libert 5+:

Long term max power: 100 W
Short term max power: 150 W
Impedance: 4 - 8 ohm
Sensitivity (2,83 v/1m) : 87 dB
Frequency range +/- 4dB : 40 - 22 000 Hz

Tweeter: 25 mm soft dome
Woofer: 165 mm

My question is whether there is any risk in this matching from a technical specs point of view. What particularly makes me having doubts is the IHF dynamic power of the amp (185W for 4 ohm) comparing to the short term max power of the loudspeaker (150W). In which circumstances can this be dangerous for my system? For info, I listen mostly jazz music (often “noisy” free improvisation) in a +/-30m² room.

Thank you in advance for your help.




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