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PERFORMANCE AUTO & SOUND
AMPLIFIER REVIEW
CLARION XC6410
4 OHM POWER vs THD+N 1kHz 14.4V Batt 2 OHM POWER vs THD+N 1kHz 14.4V Batt
4 OHM BRIDGED POWER vs THD+N 1kHz 14.4V Batt MAX FLAT - FREQUENCY RESPONSE
CROSSOVER RANGE - FREQUENCY RESPONSE BASS EQ - FREQUENCY RESPONSE
CROSSTALK - FREQUENCY
LISTENING
Connected to my reference listening
system in three-channel mode – with
channels one and two bridged to
a four-ohm woofer and the remain-
ing two channels driving my reference
speakers – I set the subwoofer cross-
over to about 80 Hz and leave the main
channels in all-pass mode.
In a word, the amplifier sounds excel-
lent. I’m used to having to put up with
a bit of telltale class D “hash” from a
lot of full range class D amps, but the
XC6410 has none of it. As in zero. Nor
does it have any type of audible noise
or hiss – even with the gains fairly high
and my ears only a short distance from
my tweeters. Clarion has come up with
a really good sounding amplifier here
and I’m having a great time testing its
mettle with a variety of musical genres
at both low and high volume levels. The
amount of available power is great, the
amp never feels like it’s running out of
breath unless I’m doing stupid things
with the volume control. In fact, the amp
sounds very neutral and has excellent
MEASURED
PERFORMANCE
SPECIFICATIONS
MANUFACTURERS
RATED POWER
85 W x 4 @ 4 Ω
125 W x 4 @ 2 Ω
250 W x 2 @ 4 Ω
ACTUAL MEASURED
POWER
@ 1.0% THD+N
@ 12.6 V BATTERY
68 W x 4 @ 4 Ω
113 W x 4 @ 2 Ω
241 W x 2 @ 4 Ω
ACTUAL MEASURED
POWER
@ 1.0% THD+N
@ 14.4 V BATTERY
91 W x 4 @ 4 Ω
150 W x 4 @ 2 Ω
318 W x 2 @ 4 Ω
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> clarion.com
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> @ClarionUSA
stereo imaging. The bottom end is tight,
well-controlled and gives my single four-
ohm woofer all it can handle. I experiment
with the on-board bass boost and find it was
pretty useful with a relatively narrow Q and
boost at about 45 Hz. All in all, this is a very
good sounding, uncolored amplifier.
PERFORMANCE/BENCH MEASUREMENTS
After I’m finished listening, I move the
amp into the lab for some bench testing
to see exactly what kind of performance
numbers it can deliver. The Clarion XC6410
does not disappoint and easily exceeds all
of its published specifications, including
the CEA-2006B specs that Clarion prints
on the box and manual. Some people don’t
appreciate how valuable these specs are,
but rest assured when you are comparing
two amps by the CEA-2006 specs, it truly is
an “apples to apples” comparison. Kudos to
all the manufacturers like Clarion who have
the cojones to publish real numbers.
The XC6410 scores very high in all
measurements with exceptional fre-
quency response, signal-to-noise and
stereo separation performance. One often
overlooked area is common mode rejec-
tion, which is a measurement of how well
the front end of the amp rejects noise –
alternator whine, for example. The XC6410
performs admirably in this test with over
60 dB of rejection, which is easily double
the rejection some competitive products
and will go a long way in keeping noise
out of the system and installers happy.
It also gets high marks in power, efficiency,
distortion and has a comprehensive pro-
tection scheme.
CONCLUSION
If you are in the market for a four-chan-
nel amp, Clarion’s XC6410 is very worthy
of serious consideration. It has exemplary
sound quality, is well engineered and nicely
made as well as designed and built for use
in your car or your boat, which provides
a great deal of application flexibility. Couple
all that value with a measured output pow-
er of 150 watts per channel and it comes in
right at about a-buck-a-watt. That’s makes
it a great deal, period.
Signal to Noise Ratio referenced to 2 V output
(CEA-2006A) (1 W @ 4 Ω)
-89.9 dBA
Signal to Noise Ratio referenced to full output -109.5 dBA
THD+N at rated 4 Ω power 0.05%
CEA-2006A rated 4 Ω power (min. power per ch.
developed over the entire intended audio bandwidth)
87 W
Maximum Efficiency at full 4 Ω power per ch. 83.4%
Maximum Efficiency at full 2 Ω power per ch. 72.3%
Efficiency at 10 watts per channel, 4 Ω 63.1%
Idle Current 1.4 A
Input Sensitivity 201 mV – 6.0 V
Maximum Current at full power, lowest rated impedance 46.3 A
Frequency Response (-3 dB) <10 Hz – 74 kHz
High Pass Crossover
50 Hz – 5 kHz
-12 dB/Oct
Low Pass Crossover
50 Hz – 500 Hz
-12 dB/Oct
Subsonic Filter None
Bass EQ boost +12 dB @ 47 Hz
TECHNICAL DATA
The following power measurements have been obtained using industry standard
methods (1 kHz @ 1.0% THD+N – Battery voltages shown +/- 0.2 V).