3.Connect the loudspeakers to the Channel 1 and Channel 2 SPEAKER OUTPUTS (5,7). THE TOTAL SPEAKER LOAD MUST BE AT LEAST 4 OHMS PER CHANNEL. If you try to operate at a lower impedance, the amplifier will go into protection mode and stop operation until you correct the load conditions.
4.With the LEVEL CONTROLS (12,15) of both channels set to zero (fully counterclockwise), turn the POWER SWITCH (9) on. Apply a signal to the input of the amplifier. The level of the input signal should be as high as you will ever need it to be. This way, it will be as high above the amplifier’s noise floor as possible, ensuring an excellent performance and signal to noise ratio. Adjust the LEVEL CONTROLS (12,15) for each channel to achieve the desired maximum listening level. Note, when the CLIP LED (14) light, there is distortion present in the amplifier’s output section. If a CLIP LED (14) remains on or flashes repeatedly, reduce the signal level by lowering the input level control for the channel that is clipping or reduce the level at the source.
PARALLEL MONO OPERATION:
Follow these instructions for Parallel Mono Operation using a single input cable, and you will have the same monophonic signal on both the Channel 1 and the Channel 2 outputs. Each channel’s output is controlled independently by that channel’s level control.
1.With the power off, set the OPERATION MODE SWITCH (3) to the Parallel Mono position.
2.With the power off, connect your input cables to the Channel 1 input only using the 1/ 4" INPUT JACK (1) of Channel 1.
3.Connect the loudspeakers to the Channel 1 and Channel 2 SPEAKER OUTPUTS (5, 7). THE TOTAL SPEAKER LOAD MUST BE AT LEAST 4 OHMS PER CHANNEL. If you try to operate at less than 4 Ohms per channel, the amplifier will go into the protection mode and stop operation until you correct the load conditions.
4.With the LEVEL CONTROLS (12,15) set to zero (fully counterclockwise), switch the POWER (9) on. Apply a signal to the input. The level of the input signal should be as high as you will ever need it to be. This way, it will be as high above the amplifier’s noise floor as possible, ensuring an excellent performance and signal to noise ratio. Adjust the LEVEL CONTROLS (12,15) for each channel to achieve the desired maximum listening level. Note, when the CLIP LED (14) light, there is distortion present in the amplifier’s output section. If a CLIP LED (14) remains on or flashes repeatedly, reduce the signal level by lowering the input level control for the channel that is clipping or reduce the level at the source.
MONO BRIDGE OPERATION:
Follow these instructions to bridge the unit’s output. Bridging the amplifier converts the unit to a monophonic or single channel amplifier . The amplifier can be used with 8 Ohm or higher loads only in Mono Bridge mode. This mode is used to provide a higher voltage with greater headroom to your speaker. Before setting your amplifier for Mono Bridge operation, make sure that your speaker can handle the high power level provided by the amplifier in Mono Bridge mode.
CAUTION: VOLTAGE OVER 100 VOLTS MAY BE PRODUCED AT THE BRIDGE OUTPUT TERMINALS IN THIS MODE.
1.With the power off, set the OPERATION MODE SWITCH (3) to the BRIDGE position.
2.With the power off, connect your input cables to Channel 1 input only using the 1/4" INPUT JACK (1) of channel 1.
3.Connect the loudspeaker to the BRIDGE SPEAKER OUTPUT (6) only. Be sure the polarity of your connection is correct. The total speaker load must be at least 8 Ohms or above. If you try to operate at less than 8 Ohms in the Mono Bridge mode, the amplifier will go into the protection mode and stop operation until you correct the load conditions.
4.With the Channel 1 LEVEL CONTROL (15) set to zero (fully counterclockwise), switch the power on. Apply a signal to the input. The level of the input signal should be as high as you will ever need it to be. This way, it will be as high above the amplifier’s noise floor as possible, ensuring an excellent performance and signal to noise ratio. Adjust the LEVEL CONTROL (15) for Channel 1 to achieve the desired maximum listening level. Note, when the CLIP LED (14) light, there is distortion present in the amplifier’s output section. If a CLIP LED (14) remains on or flashes repeatedly, reduce the signal level by lowering the input level control for Channel 1 or reduce the level at the source. During Mono Bridge operation, the Channel 2 level is inactive, however, both channels’ LED will flash simultaneously and show output conditions.
USING THE GROUND LIFT SWITCH:
Depending on your system configuration, sometimes applying the ground will create a quieter signal path. Sometimes lifting the ground can eliminate ground loops and hum to create a quieter signal path.
1.With the power amp on, listen to the system in idle mode (no signal present) with the ground applied (the GROUND LIFT SWITCH (4) in the left position).
2.Turn the power off before moving the GROUND LIFT SWITCH (4). Lift the ground by moving the GROUND LIFT SWITCH (4) to the right, turn the power back on and listen to determine which position will provide a signal free of background noise and hum. Keep the GROUND LIFT SWITCH (4) in the ground position if the noise level remains the same in either position.
CAUTION: DO NOT TERMINATE THE AC GROUND ON THE POWER AMPLIFIER IN ANY WAY. TERMINATION OF THE AC GROUND CAN BE HAZARDOUS.
SPECIFICATIONS:
| X1 |
| X2 | X3 | X4 |
Output Power EIA: |
|
| 1kHz @ 1% THD, Wrms | ||
Both Channels Driven 8Ω | 85 |
| 140 | 200 | 200 |
Both Channels Driven 4Ω | 110 |
| 200 | 300 | 300 |
Mono Bridge 8Ω | 220 |
| 400 | 600 | 600 |
Dynamic Headroom, dB: |
|
|
|
|
|
At8Ω | 1.4 |
| 1.5 | 1.6 | 1.6 |
At4Ω | 1.9 |
| 2.0 | 2.2 | 2.2 |
Frequency Response |
|
|
| 30 Hz - 50 kHz | |
Total Harmonic Distortion | Iess than 0.05%, typical 0.02% @ 1 kHz | ||||
Signal to Noise ratio |
| 100 dB below rated power @ 8Ω | |||
Damping factor |
|
| greater than 200 @ 8Ω | ||
Slew rate |
|
|
| 20 V/µS | |
Voltage gain, dB | 28 |
| 30 | 32 | 32 |
Input Sensitivity (for rated power at 8Ω ) | 1 Vrms | ||||
Input Impedance Unbalanced |
|
| 10 kΩ | ||
Input Impedance Balanced |
|
| 20 kΩ | ||
Power consumption, W | 500 |
| 800 | 1200 | 1200 |
(at rated power at 4Ω , both channels driven) |
|
| |||
AC Power Requirements | |||||
Indicators: |
|
|
| 1 Power LED | |
............................................................................................... |
|
|
| 1 Protect LED | |
.................................................. | 1 Signal LED per Channel (for X1, X2, X3) | ||||
................................................................. |
| ||||
Cooling |
| Fan, | |||
Protection: |
| Short Circuit, DC, Thermal | |||
............................................................... |
| Sub/Ultrasonic Frequency Filters, | |||
Connectors: |
|
|
|
|
|
Balanced/Unbalanced lnputs |
|
| 1/4" Jack | ||
Speaker Outputs |
|
| |||
Dimensions: |
|
|
|
|
|
X1, X2, X3 | 19"W x 10.75"D x 3.5"H (483 x 273 x 89 mm) | ||||
X4 | 19"W x 10.75"D x 5.25"H (483 x 273 x 133 mm) | ||||
Weight | 16.3 Ibs | 17.8 Ibs | 20.2 Ibs | 21.6 Ibs | |
| 7.4 kg | 8.1 kg | 9.2 kg | 9.8 kg | |
SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE WITHOUT NOTICE FOR PURPOSE
OF IMPROVEMENT
(4)
