Denon POA-A1HDCI - Manual (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