Pass Labs X2.2 owner manual

Setup

X2.2 Owner’s Manual

The preamplifier has four sets of input connections, both single- ended and balanced output connections, and a separate tape loop.

The preamplifier’s voltage and current rating are indicated by affixed tag on the bottom of the preamplifier. It will indicate either 240 volts, 220 volts, 120 volts, or 100 volts. A 0.5 amp 3AG slow blow fuse is provided with 100-120 volt units, and a 0.25 amp slow blow fuse is provided with 220-240 volt units. The frequency rating of the power supply is 50 to 60 Hz in all cases. The preamplifier typically draws less than 30 watts during operation. Please verify that the indicated voltage requirement of this preamplifier is consistent with the voltage at your location.

We have provided a standard IEC AC power cord that fits into the IEC line receptacle at the rear of the preamplifier chassis. The preamplifier is equipped for operation with an earth ground provided by the user’s AC outlet. Do not defeat this ground. The circuit ground of the preamplifier is connected to earth and power ground through a power thermistor, which gives a ground connection for safety but helps avoid ground loops.

There are a total of four inputs and a separate tape loop. Two of the four inputs can be used single-ended or balanced. The other two inputs are single-ended only. The tape loop has both single-ended and balanced inputs and outputs. Balanced inputs and outputs are via XLR connectors. Single-ended inputs and outputs are via RCA connectors. On the XLR connectors, pin 1 is grounded, pin 2 is the positive signal, and pin 3 is the negative signal. Left channel RCA connectors are marked with “L” from below. Right channel RCA connectors are marked with “R” from below. Balanced XLR inputs and outputs are marked with “L” for left and “R” for right channel.

If your signal source is unbalanced, input will occur through the RCA input connector, which is in parallel with the XLR connections 1 and 2. When single-ended inputs are used on input 1 and input 2, a shorting plug is provided between pins 1 and 3 of the XLR connection, shorting the negative input to ground, and providing optimal performance.

The unbalanced input impedance of the preamplifier is 33 kOhms. In balanced mode, the input impedance is higher, with a differential impedance of at least 66k Ohms.

Next to the inputs on the rear panel, the preamplifier offers tape inputs through both XLR and RCA connectors. This output is a direct connection to inputs 1, 2, 3, and 4 when they are selected from

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