Michael Yee Audio
THE SUPERNOVA POWER SUPPLY...
Manual for the SuperNova
The SuperNova is a state-of-the-art phonograph preamplifer that is designed to provide superior imaging of all types of music. The SuperNova accepts up to three switchable phono inputs, with each turntable having individual user-adjustable GAIN settings from 40 to 60 dB and user-adjustable INPUT LOADING settings from 30 Ohms to 100,000 Ohms. The SuperNova also features a front-panel passive attenuator, which allows the user to operate the SuperNova directly from a power amplifier. The SuperNova is designed in this way to limit signal path switching noise and provide the cleanest and most realistic sound possible.
The SuperNova also features a separate Battery Power Supply unit featuring four seven-cell NiMH AA battery packs, one for each positive and negative power supply for each channel. There are four separate charging circuits to prevent repeated overcharging of one battery pack while unercharging another. The battery packs have an estimated life of three-plus years.
The SuperNova front panel contains a three-position switch selector (to switch between turntables), an 11-position attenuator (for volume control when running the unit directly to a power amplifier) and two LEDs which indicate the status of the charging system. The SuperNova rear panel is designed for flexibility, with inputs for up to three turntables and user-adjustable GAIN and INPUT LOADING settings for each. See the SuperNova Owner's Manual for precise details on features and appropriate settings.
Do NOT leave the SuperNova Power Supply (SNPS) connected to the SuperNova if the SNPS is not plugged into the wall. This will quickly compromise the integrity of the batteries. We suggest leaving the SNPS plugged in to wall power at all times.
1) The battery charging system may need several charging cycles before the SuperNova Power Supply (SNPS) is fully happy. Because the maximum charging time is limited by software and the batteries are so high capacity, the battery packs are actually not fully charged for several cycles. The unit will still operate perfectly, but the indicator light will not indicate a full charge for several cycles.It is recommended to give the batteries an overnight charge before using the SuperNova.
2) There have been instances of the battery packs coming loose during shipping. We have addressed this by adding a third battery strap to the units. If your batteries have come loose, reconnect them as per this Battery Replacement page.
3) Batteries will eventually need to be replaced (they average about a four-year life span). See the Battery Replacement page for details.
SYSTEM NOISE OR HUM:
With the SuperNova set at very high volumes and no record playing, there exists the possibility of a very slight hum coming from the unit. This is normal, and will not be evident under normal circumstances with a record playing at reasonable volume. It is not unusual to have a little noise in an analog-based system, especially at very loud playback levels. Most prefer this to the sterility of digital.