soulution
nature of sound
Page 4
2Technical Highlights
2.1 Philosophy
The ideal amplifier is perfectly load stable and 100% level and phase accurate. The
monoamplifier 701 is closest of all to this ideal. It is capable to output up to
1’200W of continuous power (into 4Ω) and more than 12,000W of transient power.
More than enough to breathe new sonic life into even the most demanding loud-
speakers.
2.2 Layout
To deliver these impressive power levels we have used bridged amplifiers. Optimized
mechanical construction ensures both amplifier circuits are perfectly balanced,
sharing identical thermal conditions and ideal grounding. When no music is playing
an intelligent control system automatically lowers the quiescent current. And when
loudspeakers dictate bi-amping, the 701 can be easily switched to this mode. We
think of it as tailor-made amplification.
2.3 Amplification
From the input the 701 first buffers the music signal. A high performance correc-
tion amplifier is then used to capture and correct any deviations in the signal, very
quickly and very precisely. Ultra wideband amplification using no feedback loops
follows, a less than 10 nanosecond transit time and level accuracy to within 0.1dB
ensuring signal purity. The whole is housed within a sealed module, maintaining a
common temperature across all stages to further guarantee precision. The output
stage comprises 14 power transistors per channel (28 per monoamplifier), all
mounted onto a massive copper rail which is temperature controlled for a constant
quiescent current. The 701‘s impressive low level signal handling is reflected in its
raw power delivery. Current levels of 60A and more are readily attainable.
2.4 Power supply
The supply of the amplifier section is based on modern switched mode power sup-
plies. Four modules with 600VA each optimized for audio application combined
with audiophile capacitors (>1’000’000 microFarad) provide enough power reserves
even for the most demanding music signals. Circuitry that does not process audio
signals should not be able to influence them. That’s why we use no less than 3 ded-
icated power supplies within each monoamplifier for the ancillary stages.
