Edwards Audio Apprentice Plus

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The intention was to try to build the best and least expensive
British made amplifier on the market, just to prove that we can still do
it. The result is the impressive Edwards Audio series of integrated
amplifiers, which we feel is a very attractive product with our
customary top level of sonic performance.
The main design is a spin off from its bigger brothers, with some
lessons learnt along the way. It is based around an all new class AB,
Bi-polar, Darlington configured output stage using Sanken devices,
coupled with a differential front end and buffered voltage stage. The
main PSU consists of a custom wound toroidal transformer with 20,000uF
of smoothing. The active pre-amp section uses a Soundwell volume control
and features relay input switching. So, there are no compromises on the
parts!
The IA model design brief was to produce a hair-shirt all out
performance product that anyone could afford, which especially in these
tough economic times we believe is an important consideration, so the
only concession to modernism has been the elimination of remote volume.
The IA1-R has remote volume if you cant live without it!
The elegant half width case size with RED LED backlit
display allows the amplifier not to be imposing in the domestic
environment even withits flexible input arrangement:you have 1 x
line level on 3.5mm stereo jack and 4 x line level inputs on RCA, one of
which is labelled OPTION, for use with the optional moving magnet RIAA
input stage.
The PCBs are all surface mounted using Vishay mini melf
1% resistorsnot the usual thin film type which sound inferior. The
capacitors, no less than Panasonic FM series and larger components are
all hand placed and hand soldered as flow soldering has a negative
impact on sound quality.
So where have we been able to make the savings? Well
the answer is simple, by investing over many years in buildings and
machines we have very low overheads and consequently a low cost of
production. This is enhanced by some efficient design techniques that
enable us to produce a complete tested amplifier in less than an hour,
most of which is spent on the hand soldering of all the thru-hole
components.
Denumiri similare la Amplificator pentru casti Edwards Audio Apprentice Plus: ApprenticePlus
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