For 5 kHz and 6 kHz sine wave input, at 8 ohms, the A+B peak at 11 kHz is at 90 dB below the fundamental, while the B-A peak at 1 kHz is - 94 dB.

At 4 ohms, a little better for A+B, and a little worse for B-A.

At 10 kHz and 11 kHz, and 8 ohms, A+B at 21 kHz was at - 77 dB, and B-A at 1 kHz was at - 85 dB.

At 4 ohms, about the same for both peaks.

At 5 volts output, THD+N remained the same across the audible frequency band regardless of the load. This results in superb neutrality.

At 20 volts output, instead of THD+N beginning to rise at 200 Hz as it did with the N^o 433, it waits until about 4 kHz before increasing, with higher impedance loads. What this means is more neutrality in the sound.

THD+N vs. Power Output shows that, like the N^o 433, the N^o 436 more than meets specification, producing 480 watts into 8 ohms at clipping (1% THD+N) and 740 watts into 4 ohms.

Overall, the bench test results show that one is getting absolutely exquisite audio quality here.

Conclusions

Like the Mark Levinson N^o 326S preamplifier, the N^o 433 and 436 power amplifiers deliver great sound, with plenty of power, and excellent value.

Not everything in this world that is expensive, is worth the dollars. Mark Levinson, delivering top notch performance beyond the printed specifications, is worth every penny.
 

- John E. Johnson, Jr. -