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In-depth Technical Information
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Aphrodite
AvantGarde
"As the first electronic product in our AvantGarde range", says
John Mulcahy, Head of Engineering of TAG McLaren Audio, "we were
determined to show that we could match Aphrodite's superb looks
with equally superb sound quality. Our engineering team were set
the task of producing uncompromised technical performance within
the 'designer music system' AvantGarde package and took to their
task with great enthusiasm, drawing from the best features of
our established products and in particular reaping the benefits
of the extensive development work done for the AV32R, DPA32RDAB
and T32R."
This is how the task was achieved:
CD Transport
The first task was to define the CD mechanism. It was quickly
established that to realise Aphrodite's potential a new
mechanism was needed, and after investigating the alternatives
the latest Sony OEM mechanism was selected. This employs their
latest transport mechanism and chipset, with digital servo
control. We use a special derivative that is suited to our
unique mechanical assembly. This transport is placed in a very
substantial diecast aluminium platter, with its carefully tuned
isolating suspension, which provides an ideal environment for
the laser sled. The precision turned aerospace-grade aluminium
disc puck further enhances the stability of the rotating
assembly and makes its own small but important contribution to
the marvellous sound quality. The Aphrodite CD mechanism quickly
established that Aphrodite is now the best CD transport we make,
even beating our TAGtronic sync-link equipped CDT20R-T2L
in back-to-back testing! As a CD transport, Aphrodite comes
second only to the extraordinary ability of our new DVD32R.
Aphrodite in Electric Blue
with Calliope speakers
Advanced Microprocessor Control
The processor within the Sony chipset is slaved to the much
more powerful Siemens 80C161 microcontroller, as used in the
AV32R and all TAGtronic products, that is Aphrodite's brain,
delivering the full complement of replay features. The Siemens
microcontroller is combined with our custom-designed, highly
legible vacuum fluorescent display to provide a flexible and
intuitive user interface with a great many features, right down
to a clock that can be automatically set from the RDS time
signals broadcast by FM stations. TAGtronic communications
allows for future software upgrades and communication with other
products - allowing the easy addition of our forthcoming
multi-room products.
Digital-Analog Conversion
Having established the means of getting a top class digital
data stream from the disc, the engineers turned to the task of
d-a conversion. There was an obvious candidate, the truly
excellent AK4393 96kHz, 24 bit, 128-times oversampling converter
used in AV32R and our new DPA32RDAB. We knew from the
AV32R and DPA32RDAB developments that this was the
best sounding converter of all those we had auditioned, so it
was the natural choice for Aphrodite. The 96kHz capability of
the DACs guarantees their excellent performance when processing
the 128-times oversampled cd data, which is digitally filtered
within the DACs with full 24-bit resolution. The performance is
all we have come to expect from our knowledge of the part in the
AV32R and is state of the art for CD d-a conversion.
FM & AM Tuner
The tuner in Aphrodite presented its own challenges. The
performance of the rest of the product is so high that a great
deal is asked of the tuner circuitry. Naturally, our reference
standard T32R pointed the way. The RF front ends in FM and AM
are taken directly from the T32R, as is the convenience of twin
fm inputs to accommodate an antenna and a cable feed. Space
constraints prevented the use of T32R's extraordinarily linear
demodulation circuits, so our Formula One RF experts developed
new circuits specially for Aphrodite. The result is quite
marvellous - a little 'kinder' than T32R when presenting some
less than perfect material, but equally adept at making the most
of those high-calibre transmissions that are freely available to
all of us.
Aphrodite
Block Diagram
Preamplifier Section
The next challenges lay in input selection, as Aphrodite
incorporates internal CD and tuner sources plus external TV and
tape inputs, and volume control. Our brand new DPA32RDAB
analog/digital preamplifier led the way in this regard, itself
building on the excellent foundation laid by the AV32R. The same
electronic source selection is used, eliminating the deleterious
effects of relays in the signal path. Volume control is based
around the CS3310, an Integrated Circuit which was carefully
selected to offer the best possible sound quality. The CS3310
provides digitally controlled analog domain volume control over
a very wide dynamic range, with precise 0.5dB steps and truly
excellent channel balance. A great deal of effort was spent
during the AV32R development in determining the optimum circuit
configuration for the chip to extract the best possible
performance, and during the lengthy auditioning phase of
Aphrodite further refinements were made. The result is that
Aphrodite contains a highly transparent and refined preamplifier
to best convey the remarkable abilities of its CD transport and
da converter.
Power Amplifier
The final component in Aphrodite is the power amplifier. Here
we drew on the European amplifier of the year, the 60iRv, with
the refinements picked up during the development of the 100x5R.
Aphrodite also benefits from the same gold-plated, oxygen-free,
high-purity copper (OFHC) loudspeaker terminals used on 100x5R
and our F1 loudspeaker, with more OFHC employed in the wiring
that connects the terminals to the amplifier outputs.
Conclusion
Overall, Aphrodite combines in one package the best elements
of a great many TAG McLaren Audio products, and - even better -
our listening panel confirmed that the whole is greater than the
sum of its parts, as Aphrodite delivers a superbly musical
performance to match its technical and aesthetic excellence.
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