Bowers & Wilkins, B & W (Bowers Wilkins) 801 Series 80
1 watt into 8 ohm load for a s.p.l. of 85dB at 1 m, sinewave input at 300Hz. Second harmonic: lesslhan 2.00% 0.60% Third harmonic: lesslhan 1.00% 1.00% Fourth harmonic: lesslhan 0.20% 0.10% Fifth harmonic: lesslhan 0.30% 0.15%.