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12. Damage Requiring Service
Stop using the unit immediately and have it inspected by an authorized music hall
service center whenever:
1. The power supply cord or plug has been damaged.
2. Liquid has been spilled into the unit.
3. The unit has been exposed to rain.
4. The unit does not operate properly.
5. The unit has been dropped or damaged.
6. Smoke or any unusual smell is detected from the unit.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE
COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
Getting Started
Thank you for purchasing the music hall dac25.3. The dac25.3 is a tube digital-
to-analog converter (DAC) designed for the music lover. We chose a select group
of technologically advanced components to create this sophisticated digital-to-
analog converter. The dac25.3 can accept any coax (s/pdif), USB, XLR, or optical
digital input from one of music hall's compact disc players, a CD/DVD transport,
iPod transport, computer, media server, Sonos, Squeezebox, DVD in stereo, and
will output two channel stereo analog. When used with your computer or in a
top-end audio system, your music hall digital-to-analog converter will provide
years of listening enjoyment.
The dac25.3 features the latest Texas Instruments (formerly Burr-Brown) PCM
1796 24bit, 192kHz, advanced segment, stereo audio digital-to-analog converter.
This processor features 123dB dynamic range, an 8 x oversampling digital filter,
and just 0.0005% THD. The dac25.3 upsamples to either 96kHz or 192kHz; user
selectable on the front panel. To achieve the best sound, we use an advanced
asynchronous reclocking and anti-jitter control system upstream of the PCM1796
digital-to-analog converter. For this system, we are using the Philips 74HC574 in
conjunction with the Texas Instruments SRC4192 Asynchronous Sample Rate
Converter, whose master clock is a high precision active crystal oscillator. The
dac25.3 also features a large, high current oversize power supply and a tube
output for warm rich sound. A headphone output is provided for convenient
personal listening.