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Design Brief – DD15 CD transport
DD15 is a CD transport, designed to partner any high performance digital to analog
converter, and in particular the Primare I15 Prisma, SC15 Prisma models of integrated
amplifiers and preamplifiers.
Contents
• Design Philosophy
• Drive Technology
• System Building
• Specifications
Design philosophy
All of Primare designs are a result of our Practical Design Approach, resulting in a focus
on two fundamental design elements:
1. Thoroughly implemented power supply designs – so that all elements of any
design to operate effortlessly at their fullest effectiveness. Every product and subcircuit demands unique power supply solutions - a more conventional linear supply
or advanced switch mode main supply may work best dependent upon the
application, and carefully crafted individual discrete power supplies are
strategically inserted into the circuit to deliver power exactly where and how
much is needed.
2. Artfully crafted ultra-short signal paths - so that each individual component and
sub circuit operates sympathetically to achieve a cohesive whole. Elegant and
simple electrical designs are used in even the most complex product, utilizing
ultra-short signal paths with all gain in one device whenever possible. Ultimately,
this results in fewer, higher quality parts for a reduction in associated distortions
and an increase in overall electrical efficiency.
To that end, basic technologies have been selected to realize those benefits:
• 2 and 4-layer double-sided circuit board construction allows for the most
direct and efficient layout of circuit components not only for the shortest signal
path, but also to more easily achieve a sympathetic layout of circuit and subcircuit components for best performance.
• Surface mount components are used whenever possible as this allows for
direct connection of the circuit device or component to the circuit board trace
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Limstensgatan 7 | SE-21616 Limhamn | Sweden | +46 40 6548800 | primare.net
with the solder being used solely to mechanically hold the part in place. The
elimination of the small metal lead or wire at each connection point in a more
conventional large scale circuit device or component cumulatively shortens the
signal path. Additionally, conventional large scale components demand
through hole or “eyelet” construction, limiting direct contact of the component’s
lead to the circuit board trace and resulting in the solder providing electrical
connection as well as mechanical connection for the device. Neither solder nor
the metal used in the leads of most large scale devices provide the best signal
transmission, therefore limiting potential performance of even the best
designed circuits.
Drive Technology
The Philips slot load disc drive chosen for use in DD15 was originally developed for the
transportation industry, and as a result is extremely reliable and well isolated from
external and internal vibrations, ensuring long life and low noise.
Power Supply Technology
A customer linear power supply is combined with a switch mode standby supply (turned
off when in playback mode to minimize noise) to deliver on demand the precise power
needed.
System Building
DD15 is designed to provide the lowest noise digital signal from compact discs so any
high performance digital to analog converters, like those found in the Primare I15 Prisma
and SC15 Prisma models of integrated amplifiers and preamplifiers.
DD15 Rear Panel
DD15 CD Transport Specifications
Compact Disc Player
Mechanism: Philips CDM-M10
Digital outputs:
• 1x RCA
• 1x TOSLINK
General
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Control
• C25 system remote control
• RS232
• IR in/out
• Trigger in/out
Power consumption:
• Standby 0.5W
• Operation 10W
Dimensions: (wxdxh)
• 350 x 329 x 73 mm with buttons and connectors
• 430 x 329 x 73 mm without buttons and connectors
Weight: 6.5 kg
Color options: Black or Titanium
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