Traded in a wonderfull and in excellent working condition Chord SPM-1200E. 220v
Chord SPM-1200E is a 350W per channel MOSFET power amplifier that
has a sliding bias arrangement, all driver circuitry running in class
A and dynamic coupled power rails. It has all-important balanced inputs
and two sets of heavy duty WBT speaker terminals. It is virtually
maintenance-free (I've only sent it back once for a service where Chord
changed a few distortion setting resistors and pronounced it as good as
new) and just goes on working no matter what. There are 16 power
MOSFETs per channel. It runs dead quiet and consumes little power
(about 40W at idle) meaning that it can be left on permanently, which
aids sound quality.
The unusual aspect of the Chord's
design is a high frequency high performance switched mode power supply,
making it quite compact for its rated output. The fact that the SMPS
runs at such a high frequency, with very short recharge cycles to the
reservoirs, is why I find it such a fast amplifier, turning on a
sixpence when responding to big transients. It also runs cool at all
times, never getting more than warm when I'm pushing some serious
decibels. One thing that is hard to comprehend is that, despite the
SMPS, it responds very well indeed to regenerated power, sounding even
cleaner and more dynamic.
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