- Pass X250.5 Owner's Manual

X250.5 Owners Manual

You can position this amplifier most anywhere you wish, but it re-

quires adequate ventilation. We do not recommend placing it in

enclosed cabinets or small closets without means for air to circulate

freely. Stacking these power amplifiers directly upon each other is not

recommended for the same reason. T his amplifier typically idles at

slightly less than 350 watts, most of which dissipates as heat across

the heatsinks. As a point of reference, these heatsinks should never

become too hot to touch for several seconds.

Let’s talk about AC power requirements. This amplifier draws about

3 amps (continuous r ms) at 120 volts out of the wall during nor mal

operation, and this power draw ref lects mostly the idle cur rent that

we r un through the output stag e. If you are driving a low impedance

load, you will draw more power than this, but this will not be typical.

The amplifier’s voltage and cur rent rating are indicated on the rear

panel. It will be 240 volts, 220 volts, 120 volts or 100 volts, all with

an appropriate rear mounted resetable circuit breaker. T he frequency

rating of the AC line source in all instances will be 50 to 60 Hz. Please

verify that the amplifiers indicated voltage requirements are consistent

with the line voltag e supplied at your location.

The Pass Laboratories™ X250.5 is provided with a conventional IEC

detachable AC line cord, which is rated at 15 amps. The safety ground

is attached to the chassis in the conventional approved manner. T he

AC power input to the amplifier r uns through a RF filter, which re-

moves high frequency noise coming into and g oing out of the ampli-

fier power supply.

Under no circumstances should you defeat the g round connection of

the power cord. For your safety, the chassis of the amplifier should be

earth g rounded. Signal g round is isolated from chassis, safety ground,

to reduce the incidence of g round loop noise. T he presence of a

safety g round will not deg rade the audio signal chain.

You may substitute an after market detachable IEC 320 style power cord

of your choosing; provided it is rated for at least 15 amps and it meets all

leg al requirements and has been approved by the local testing authority

for such things.

Looking at the rear panel you will see the IEC 320 AC power cord

receptacle, a ther mal magnetic breaker switch, two pairs of output con-

nectors, a pair of binding post connectors for remote turn-on, one RCA

input connector and one XLR balanced input connector.

Make sure that the breaker switch is off (down). Plug the AC cord into

Setup