Denon POA-A1HDCI User Manual download pdf (Page 8)

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At 1 watt into 8-ohms, the POA-A1HDCI

displayed excellent results (+8.649 +

84.653)dBv = 93.3dBv or 100*alog^-1(-

93.3/20) = .0.0022%. At full rated power

the POA-A1HDCI again exhibited excellent

distortion measurements (+30.355 +

61.821)dBv=92.2dBv or 100*alog^-1(-92.2

/20) = 0.0025%. With the POA-A1HDCI

in bridged mode, it still achieved excellent

distortionmeasurements(+33.594+56.47)

dBv = 90dBv or 100*alog^-1(-90 /20) =

0.0032%. This was among the cleanest

amplifiers I’ve measured to date besting

even the venerable Integra Research RDA-

7.1.

While the overall amplitude of the primary

distortion products remained similarly good

for normal vs bridged modes of operation,

it was interesting to note that the POA-

A1HDCI even order harmonics seem to

dominate in normal mode while the odd

order harmonics seem to dominate in

bridged mode of operation.

Amplifier Output Impedance

& Damping Factor

The POA-A1HDCI exhibited vanishingly

low output impedance in normal and

bridged configurations. This indicates good

usage of negative feedback but also high

quality output devices and a large enough

power supply to be stable when driving

low impedance loads at full power. It fell

well below our desired 100 mohm or less

mark for the entire audible bandwidth up

to 20kHz and maintained itself even when

driving at max sustained power levels into

8-ohm and 4-ohm loads. This proves that

the POA-A1HDCI will sound consistently

good no matter what loudspeaker load it

is driving.

Denon POA-A1HDCI FFT Analysis @ Full Rated Power – Bridged Mode

“Coupled with the matching

AVP-A1HDCI processor,

you’ve got a state of the

art A/V separates solution

that can run toe to toe with

any of its peers in this price

class.”

Gene DellaSala

Denon POA-A1HDCI Amplifier Output Impedance – Normal Mode

Denon POA-A1HDCI Amplifier Output Impedance – Bridged Mode

Denon POA-A1HDCI Amplifier Damping Factor – Normal Mode

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Denon POA-A1HDCI User Manual Page 8

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