Receivers

Denon AVR-1909 7.1 A/V Receiver

ARTICLE INDEX

 

I tested the receiver with two channels driven. Distortion measurements were within an 80 kHz bandwidth.

At 20 volts into 8 ohms (50 watts RMS), IMD was 0.055%

Denon AVR-1909 7.1 A/V Receiver

The measured frequency response was 10 Hz - 100 kHz, - 2 dB, and was flat from 10 Khz - 20 kHz.

Denon AVR-1909 7.1 A/V Receiver

THD+N vs. Frequency is shown below for 8 ohms and 4 ohms. The 20 volt at 4 ohms graph line suggests that this receiver may not do very well with 4 ohm speakers (because distortion stays relatively high all along the graph line).

Denon AVR-1909 7.1 A/V Receiver
Denon AVR-1909 7.1 A/V Receiver

THD+N vs. Power Output is shown below for 8 ohms and 4 ohms. At 8 ohms, clipping (1% THD+N) occurred at 115 watts output, while at 4 ohms, clipping occurred at 140 watts output. There is not much difference in output between the two impedance loads, so I say again that this receiver should probably be limited to use with 8 ohm speakers.

Denon AVR-1909 7.1 A/V Receiver