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We are convinced it will give you many hours of 

listening pleasure.

Digital methods of recording music have many advantages,

such as very low noise, high dynamic range and fast

searching but, until now, you may have been disappointed

by the sound quality when you play digital recordings.

At TAG McLaren Audio, we understand exactly what needs

to be done to get the best sound from a digital recording.

accurate reproduction

Digital recording is quite insensitive to

data losses, such as a scratch on a disc or

a drop out on a tape. However, rebuilding

the recorded music exactly, even from a

perfect digital recording, is a complex task

which is often not appreciated and has only

recently been fully understood.

very high resolution

The digital signal represents the original

music as rapidly changing groups of bits

(i.e. the ‘zeros’ and ‘ones’ understood  by

computers). More bits in each group allow

a more accurate representation of the

music information during its processing.

The DAC20 uses 24 bits (eight bits more

than a CD’s original recording), which

results in higher signal resolution and

more precise sound details.

welcome

welcome

05

04

Thank you for purchasing the TAG McLaren Audio digital to analogue converter DAC20.

digital filtering

By its nature, digital data generates

unwanted, high-frequency noise when it is

converted back to the analogue domain

(which is what our ears can hear). Even

though the noise frequency is way above the

threshold of human hearing, it has unpleasant

effects on the sound due to what audio

engineers call ‘intermodulation’.To remove

this noise, the DAC20 uses a digital filter

which is made more effective by

oversampling and noise shaping the data.

This technique reduces the high frequency

noise by using an 8 times digital

oversampling filter.The data from the filter is

further oversampled, using noise shaping, to

produce a 192 times single bit data stream

for conversion back to analogue.

GRA00046.1-[CA]DAC20  13/03/01  10:05  Page 5

Summary of Contents for DAC20

Page 1: ... A L I N P U T spdif 75 ohm C O A X I A L O U T P U T fuse carrier optical input sockets coaxial input sockets analog output sockets AES EBU input socket digital output socket ac supply socket DAC 1234567 c o n t e n t s 0 2 welcome 0 8 key features 1 0 getting started 1 2 input types 1 4 selecting an input 1 5 muting 1 6 HDCD decoding 1 7 sampling frequency 1 8 jitter reduction 1 9 de emphasis 2 ...

Page 2: ...nal excellence and sheer listening pleasure celebrating a TAG McLaren victory All TAG companies perpetually strive for and achieve excellence and high performance in every area of their business These qualities are demonstrated in the fastidious standards that makeTAG Heuer watches some of the world s most admired in the teamwork that makesTAG McLaren s motor racing team one of the most successful...

Page 3: ...oup allow a more accurate representation of the music information during its processing The DAC20 uses 24 bits eight bits more than a CD s original recording which results in higher signal resolution and more precise sound details welcome welcome 05 04 Thank you for purchasing theTAG McLaren Audio digital to analogue converter DAC20 digital filtering By its nature digital data generates unwanted h...

Page 4: ...reduced to an absolute technical minimum by a very stable electronic clock which is synchronised to the incoming digital data stream to provide accurate timing The retimed output is sent to a digital 75 Ω coaxial SPDIF output for digital recording purposes as well as to the analogue section of the converter HDCD decoding HDCD High Definition Compatible Digital is a proprietary technique developed ...

Page 5: ...erference enhanced by double layer epoxy glass printed circuit board technology Linear phase output filters with high quality high stability active and passive components Three coaxial SPDIF inputs with phono and BNC sockets AES EBU balanced input with XLR socket Three optical EIAJ inputs Two low impedance analogue stereo outputs to allow long cable runs Coaxial SPDIF digital output with precisely...

Page 6: ... in the next will release it We know you are keen to get your DAC20 working This section will have you listening to your favourite music as quickly as possible If you fold out the front cover of this manual you will locate diagrams which will help you find your way around your DAC20 1 Make sure that all the components of your audio system are disconnected from the AC supply whenever you change any...

Page 7: ... finally the optical EIAJ All the inputs are on the back of your DAC20 Please ask your retailer for advice on selecting the best input format Always use high quality digital cables for connecting inputs The coaxial inputs conform to the SPDIF format and are intended to be used with 75 Ω cable Three independent coaxial inputs are provided For your convenience two types of connector are used COAXIAL...

Page 8: ...he source button has no effect Your DAC20 has a microprocessor controlled muting system to prevent switching noises which could damage your equipment from being sent to your amplifier and loudspeakers The LED on the front panel labelled mute will light when the output is muted The DAC20 turns off the analogue output for a short time whenever you change the input using the input or source buttons P...

Page 9: ...ding is being played A digital recording consists of a rapidly changing stream of digital data representing the music The sampling frequency is the number of times the data is updated in a second 1 The DAC20 detects the sampling frequency of the incoming digital data and automatically switches to the matching frequency Three sampling frequencies are in common use for digital recording 32 44 1and 4...

Page 10: ... recordings are made using a noise reduction technique called pre emphasis The DAC20 automatically recognises recordings with pre emphasis and applies de emphasis to take advantage of the noise reduction 1 The LED on the front panel marked demp short for de emphasis illuminates when a recording with pre emphasis is being played automatic de emphasis detection internal clock synchronisation 18 19 j...

Page 11: ...ed with 75 Ω cable The digital output is retimed by the precise internal clock in the DAC20 see page 18 TAG McLaren Audio equipment is designed to give optimum performance for many years Just like a high quality car the performance of your DAC20 will improve during the first few hours of operation The electronic components will then have reached and settled down to near perfect specification Every...

Page 12: ...ot use any other solutions Do not use any solvents or abrasives take great care not to get any liquid inside the case If this happens you should have your DAC20 serviced fuses cleaning 22 care and maintenance 1 You cannot open the fuse carrier drawer while the plug is in the socket care and maintenance 23 The only service you should do to your DAC20 is described on the left All other servicing sho...

Page 13: ... 110 Ω 5 balanced Coaxial and XLR greater than 200 mV pp Optical 27 to 14 5 dBm Coaxial SPDIF digital output format digital output connector phono socket 75 Ω 10 500 mV pp 10 75 Ω load phono socket 100 Ω nominal 2 0 V rms 0 5 dB full scale output for all sampling rates non HDCD encoded material Up to 4 0 V rms for HDCD encoded material 24 bit 8 times oversampling Passband ripple 0 0001 dB Stopband...

Page 14: ...atio frequency response 0 2 0 8 dB operating temperature range greater than 110 dB at 1 kHz 10 35 C 50 60 Hz 110 120 V or 220 240 V The voltage is marked on the rear of the unit less than 25 W 445 mm wide 75 mm high 320 mm deep ac supply frequency total harmonic distortion noise 0 dB full scale channel balance channel separation power consumption dimensions including feet terminals and controls ac...

Page 15: ...89 IEC65 A3 1992 EN60065 1993 EN50081 1 1992 EN55022 Class B 1994 EN60555 2 1987 EN61000 3 2 1995 EN61000 3 3 1995 FCC Part 15 Class B 1997 EN50082 1 1992 IEC801 2 1991 8 kV air discharge IEC801 3 1984 3 V m IEC801 4 1988 1 kV AC power 500 V other ports EN61000 4 2 1995 8 kV air 4 kV contact discharge EN61000 4 4 1995 1 kV AC power 500 V other ports EN61000 4 5 1995 2 kV common mode 1 kV different...

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