Denon POA-A1HDCI User Manual download pdf (Page 9)

WWW.AUDIOHOLICS.COM

The POA-A1HDCI amplifier damping

factor is about what I expected based

on the measured output impedance. It is

uniformly good across the entire audio

frequencyrangeataroundthe100mark(50

is a minimum we like to see in all amplifiers

of uncompromising design) when driving an

8-ohm loads. Into 4-ohm loads the Damping

factor is exactly as expected, ½ the 8-ohm

value and buttressing the argument that

the POA-A1HDCI is happy to drive low

impedance loads at full power.

Crosstalk

Running a full range frequency sweep

through the POA-A1HDCI amplifier at

full rated power (150wpc @ 8-ohms), I

measured channel to channel crosstalk on

two adjacent channels where one channel

was the disturber and the other was the

Device Under Test (DUT). The Audio

Precision plotted crosstalk of both channels

over frequency by varying the Distruber/

DUT channels. You can see the POA-

A1HDCI produced very good crosstalk

measurements (>81dB at 1kHz) with only

a gradual rise with increasing frequency

because of capacitive coupling. Anything

greaterthan60dBisdeemedacceptableso

this is quite good for a multi-channel amp

that isn’t a true mono block design.

As expected, channel separation got

better as you moved the Disturber/DUT

channels further apart. It is interesting

to note that varying the Distruber/DUT

of the two-channels I tested produced a

crosstalk measurement difference of over

20dB.Whilebothmeasurementswerevery

good, I couldn’t help to wonder how much

better it would have be if a bit more careful

layout was done to optimize trace routing

and minimize their coupling paths on the

circuit boards.

For two-channel audiophiles wanting the

absolute best performance this amplifier

has to offer, I’d suggest bridging the two

amplifier pairs on the opposite ends of the

amp labeled “FL” and “FR”, respectively. This

provides the maximum amount of separation

between them which is critical especially

during high power applications to minimize

magnetic coupling. As you can see in this

measurement, the POA-A1HDCI produced

Denon POA-A1HDCI Amplifier Damping Factor – Bridged Mode

Denon POA-A1HDCI Crosstalk Measurement Adjacent Channels

Denon POA-A1HDCI Crosstalk Measurement 4 Channels Apart

Denon POA-A1HDCI Crosstalk Measurement Bridged

1 2 3 4 5 6 7 8 9 10

Comments to this Manuals

No comments

Denon POA-A1HDCI User Manual Page 9

Comments to this Manuals

Related products and manuals for Receivers and Amplifiers Denon POA-A1HDCI