Epos M22 Speaker System and Butler Audio TDB 5150 Amplifier HT Labs Measures: Butler
All channels driven continuously into 8-ohm loads:
0.1% distortion at 193.5 watts
1% distortion at 227.2 watts
–0.54 dB at 10 Hz ;–0.19 dB at 20 Hz
–0.13 dB at 20 kHz; –0.67 dB at 50 kHz
This graph shows that the TDB 5150's left amplifier channel, with two channels driving 8-ohm loads, reaches 0.1 percent distortion at 219.8 watts and 1 percent distortion at 250.5 watts. Into 4 ohms, the amplifier reaches 0.1 percent distortion at 347.0 watts and 1 percent distortion at 393.7 watts. An input level of 123.5 millivolts was required to produce an output of 2.83 volts into an 8-ohm load, indicating an overall gain of +27.22 decibels.
THD+N from the amplifier was less than 0.075 percent at 1 kilohertz when driving 2.83 volts into an 8-ohm load. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –102.63 dB left to right and –118.11 dB right to left. The signal-to-noise ratio with 2.83 volts driving an 8-ohm load from 10 hertz to 24 kHz with A weighting was –119.91 dBrA.—MJP