pass TM X250.5 Owner’s Manual May 17, 2006 Manual X250.
Introduction The Pass Laboratories ™ X250.5 stereo amplifier embodies the design technology and refinements of the “X” series amplifiers including extensions of the patented Supersymmetry™ circuit. Additionally selected refinements of the XA series amplifiers have been incorporated into the X250.5 to significantly improve this products sonic performance in comparison to it’s immediate predecessor, the Pass Laboratories™ X250. The Supersymmetry™ circuit topology was granted a U.S.
Previously these kinds of simple Class A circuits have been popular for their sound quality in low power amplifiers, but have not found application at high power levels due to excessive distortion and low efficiency. Supersymmetry™ overcomes this barrier, delivering the sweetness, staging, and detail of very simple circuitry up to kilowatt power levels and beyond. The X.
Setup You can position this amplifier most anywhere you wish, but it requires 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. This amplifier typically idles at slightly less than 350 watts, most of which dissipates as heat across the heatsinks.
the back of the amplifier, and then into the wall. Then turn the breaker switch on (up). The lights in your house will blink when the power supply charges the capacitors; this is normal. This magnetic breaker switch is not to be used as a safety disconnect during servicing and is not a substitute for unplugging the power cord. On the front panel, the “Standby” LED indicator should be glowing blue, indicating that the power is on. The “Power” LED should not be on.
You are ready to play music Do everybody a favor and try not to have shorted output cables. It happens accidentally all the time, and the amplifier is designed to survive, mostly. Of course it’s always possible that something could go wrong. If so, don’t get excited, just relax. It’s really aggravating when something like this doesn’t work, we understand, but it will get fixed. We go to a lot of trouble to make products reliable, and the failure rate of our amplifiers is very low.
Speaker Interface The Pass Laboratories™ X250.5 is optimized for loads nominally rated at 4 ohms and above. You can run the amplifiers into a lower nominal impedance without difficulty, and we are not aware of a speaker on the market that presents unusual difficulty with these amplifiers. The X.5 series amplifiers do not care particularly about the reactivity of the load.
tention be paid to cleanliness of contact surfaces and proper fit. Speaker cables should be firmly tightened down at the speaker output terminals, but do not use a wrench. These connectors will not withstand unrealistic foot-lbs of torque. Hand tightening without excessive force is plenty.
X250.5 Specifications All figures obtained after a 1 hour warmup, with regulated 120 VAC power line. See manual notes about AC power line regulation. Gain Freq.
Warranty Information Please check with the factory-authorized distributor in the country you are purchasing this product for specific warranty information. All Pass Laboratories products purchased from an authorized Pass Laboratories dealer in North America are covered by a transferable, limited 3-year warranty. This warrantee includes all parts and labor charges incurred at the repair facility in addition to return shipping to the domestic customer, exclusive of subsequent damages.
For your protection please read the following: Water and moisture: Electrical devices should not be used near water ( as per example, near a bathtub, washbasin, kitchen sink, laundry tub, wet basement or swimming pool ). Care should be taken such that objects do not have the opportunity to fall, and that liquid is never spilled onto or into the device enclosure through openings.