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Finale |
Dal web il pre
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The
Quad 66 Pre Amplifier was part of the Quad 6 series launched in 1989 and
it superceded the Quad 34 and 44 Pre Amplifiers. Like the rest of the 6
series, the Quad 66 Pre Amplifier was very minimalist with all the
controls being on the remote control. The Quad 66 Pre Amplifier is also
probably one of the very few pre amplifiers whose remote control is
nearly as big as the pre amp. The Quad 66 Pre Amplifier remote control
resembled something from the deck of the Starship Enterprise, consisting
of 22 buttons and two rotating knobs, it was a grotesque looking
instrument but very functional at the same time.
The
Quad 66 Pre Amplifier had seven inputs for Disc, CD, Radio, Tape, AV,
Aux and Aux2, two of which were tape loops (one of them labelled AUX2).
Like previous Quad pre amplifiers, the DISC section on the Quad 66 Pre
Amplifier was modular meaning different moving magnet and moving coil
pre amps could be fitted to suit the cartridge being used. Quad offered
owners of the the Quad 66 Pre Amplifier a choice of five modules, 3
moving coil and 2 moving magnet. The Quad 66 Pre Amplifier was the first
Quad pre amplifier to use a microprocessor to control the pre-amp
section and control.
The
Quad 66 Pre Amplifier was in production from 1989 to 1996 and 12,000
units were sold before being replaced by the 7 series. The other members
of the Quad 6 series were the
Quad 606 Power Amplifier,
Quad 306 Power Amplifier,
Quad 66FM Tuner and the Quad 66 CD player (replaced by the
Quad 67 CD Player in 1993).
Quad 66 Pre Amplifier Specifications
Inputs: Seven (4 line, 1 phono, 2 tape loops)
Input Sensitivity: Line 300 mV (CD,Tape,Aux) , 100 mV (Radio)
Moving Magnet Disc Options: 3 mV and 1mV (Impedence: 47 kohm)
Moving Coil Disc Options: 400uv, 200 uv and 100 uV (Impedence: 100 kohm)
Mains Voltage: 110-120v, 220-240v AC (Changeable via PCB links)
Dimensions (WxDxH): 321 x 240 x 80 (mm)
Weight: 3.5 kg
Dal web il
finale:
Current dumping is a Quad invention, and describes the first successful
application of feed-forward error correction to audiopower amplifiers. A
current dumping amplifier consists of a high power heavy duty amplifier,
and a low power very high quality amplifier. The low power amplifier is
arranged so that it constantly monitors input and output. It detects any
difference and feeds forward the necessary correction to the output of
the main amplifier. Quality is solely dependent upon the performance of
the low powered high quality amplifier together with four passive
components. When correctly designed all distortion in the output stage
is reduced to zero. With this technique it is possible to produce an
amplifier of very high performance without using carefully matched
relatively fragile output devices. There are no crossover biasing
problems, no alignment or adjustment is required to obtain optimum
performance and nothing can go out of alignment during life. In the
event of component failure, replacement can be effected and performance
restored without realignment. "Current Dumping" was originally presented
as a paper to the AES 50th Convention. Since then a number of technical
articles and papers have appeared which confirm the inherent advantages
of current dumping over conven-tional class B techniques. Reliability of
the Quad 405-2 is assured by an elegant Quad designed protection circuit
which overcomes the problems associated with conventional 'load line'
protection circuits. The load sensitive time dependent circuit
effectively places no limitation on the amplifier when playing music
programme through loudspeakers but provides full protection for the
amplifier should anything go wrong. The Quad 405-2 also incorporates
speaker protection circuitry which prevents damage to the loud-speaker
in the unlikely event of component failure in the amplifier. The Quad
405 has won both a Design Council Award 1976 and The Queen's Award for
Technological Achievement 1978.
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Scheda fotografica
Pre Quad 66 : |
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Scheda fotografica
finale Quad 405 - 2 : |
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Scheda fotografica
Pre e finale : |
Dal suono
dinamico e potente , non si riesce a capire come Quad riesca a
tirare fuori tanta energia dai suoi ampli cosi compatti.
Sicuramente una accoppiata che puņ pilotare di tutto , dal suono
dinamico , ma trattenuto.
Un sito dedicato
al finale 405
http://www.quad405.com/
Altro ottimo
sito:
http://www.retrohifi.co.uk/quad%20_405-2.html
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Audiocostruzioni e
punto vendita di : |
 
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