Set-up and Operation
Speaker Connections
A pair of 5-way insulated binding posts is provided on the rear of your amplifier. While this allows bare wire to be used, we recommend that firstly banana plugs, or secondly spade lugs be used instead of bare wire. Make sure that your speaker cables are firmly connected to the correct speaker connections.
The binding posts are ETI CablePods™ for improved signal transfer, enhanced sonic performance, and a faster, more direct connection. The positive (signal) terminal is identified by the red ring on the base; and the negative (return) terminal is identified by the black ring on the base.
If you are using banana plugs, you may have to remove the little plastic covers (if installed)
on the top of each CablePod™. If you are using spade lugs, unscrew the binding posts, insert the spades, and hand tighten. Do not use pliers or other tools to tighten the binding posts as you may strip the plastic threads on the posts. These ETI CablePods are designed to fully tighten without the use of tools.
DO NOT SHORT THE TERMINALS
TOGETHER AND DO NOT GROUND THE
LOUDSPEAKER TERMINALS
Unlike many other Class D amplifiers, the output terminals of the GR-Amp do not “float” at a significant voltage above ground potential – which makes the GR-Amp useable with all loudspeakers, including those with built-in powered subwoofers and electrostatic designs. However, this does NOT mean that you can ground the negative terminal of the speaker outputs. Do NOT even attempt to short the two negative (return) terminals together. The amplifier CAN NOT be bridged for higher power.
Input Connections
Use a pair of high-quality interconnects to hook up the output of your preamplifier to the input of the GR-Amp. The balanced-input GR-Amp is a fully balanced, differential amplifier, and hence, a true-balanced source is crucial for top performance. The balanced input of the GR-Amp uses the standard configuration for the XLR input of pin 2 “hot”. Pin 1 is signal ground, and pin 3 is the signal “return”.
