Using The Dac4.1X Balanced; Cleaning; Replacing And Upgrading The Valves - Audio Note DAC4.1xBalanced Owner's Information

Using the DAC4.1x Balanced

Once all the connections are complete, turn on the digital source. Next turn on the
DAC4.1x Balanced by using the rocker switch located on the back panel above mains
inlet socket. The red led on the front panel confirms that the unit is on.
The DAC4.1x Balanced will improve over time and will start to sound increasingly
well balanced. This is because of the "bedding in" time taken by new electrical
components inside the unit. Also, the DAC's sound quality improves as the unit
reaches its normal, stable operating temperature. Only a rear panel on/off switch is
provided as the unit is designed for continuous operation. The DAC need not be
switched off each time after use. It is interesting to note that continuous operation not
only results in optimum sonic performance (since the unit is maintaining a constant
operating temperature) but also causes less electrical stress and so extends component
and valve life.
All our DACs have been designed to run into impedances of 100kOhms or greater.
Many preamplifiers both active and passive have low input impedances. We do not
recommend less than 50kOhms as this causes problems with bass roll off. If you are
in any doubt consult your dealer. Audio Note offer a modification to customers who
own pre-amplifiers with a low input impedance, which is fully refundable if at any
time an Audio Note pre-amplifier is purchased as a replacement.

Cleaning

Cleaning the DAC4.1x Balanced is best done with a soft brush - some photographic
stores are able to provide suitable brushes. Alternatively, a soft cotton cloth may be
used with a mild propriety cleaner for removing dirt build-up. Strong or alcohol based
solvents may damage the finish of this product. Ensure the DAC is switched off and
cold when cleaning. Do not wet the unit.

Replacing and Upgrading the Valves

Replacement NOS valves can be purchased from Audio Note when valves fail or
should you wish to experiment with different types of valves. A list of valves and
equivalents can be found at www.audionote.co.uk. Contact your dealer if you are
unsure what valves you should use or how to install them.
Line stage valves should provide you with 5 years of continuous operation, rectifier
valves should last much longer.