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Join Date: Nov 2008
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Your 254 is rated at 65wpc in stereo - 2 channel mode. That is a direct indication of the total power available to all channels together. Most good multichannel amps and receivers will give you somewhere around 1/3 more power when you are only using 2 channels. This ratio gives an indication of what the power supply is capable of. The lower the ratio the lower the power supply capabilities.
Harman Kardon typically are more conservative than many of the other manufacturers in their power ratings. Your 65wpc in 2 channel operation may achieve higher SPL than some makers ratings of 80-90wpc for their 7 channel amp when driven in 2 channel mode.
As for damaging your speakers, if you don't know what clipping sounds like find a way to hear it first hand. Having said that, I don't think you are in danger of harming your speakers unless you drive them to concert levels. If that is your goal, the 254 has preamp outputs, get a beefy amp and plug it in.
Yamaha CX-A5000 - Acurus A100x3 & Outlaw 7075 amps - Salk Song Towers - Oppo 103
Vinyl Room: Emotiva PT-100 - ST-120 amp - Acoustic Research AR-2ax - Marantz TT42 - Oppo 103
Twas a woman who drove me to drink. I never had the decency to write and thank her ~ WC Fields