Instruction/ maintenance manual of the product Amplifier Pass Labs
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1 pass ® XA30.5 Owner’ s Man ual May 17, 2007.
2 XA30.5 Owner’ s Manual Nelson P ass has been designing audio electronics since about 1971, first with ESS (remember Heil transfor mers?), and then for ming a new company , Threshold in 1975. Threshold pioneered the design of high pow er Class A power amplifiers and later , high pow er amplifiers using only local feedback (the Stasis series).
3 XA30.5 Owner’ s Manual W e star t with simple FET circuits already ha ving low distortion and noise, and arrang e them in tw o symmetrical halves . T he tw o halves of the amplifier channel are closely matc hed, eliminating a larg e por tion of distortion and noise without feedback.
4 XA30.5 Owner’ s Manual All the usual perfor mance metrics - pow er, distortion, noise, input impedance, damping factor and bandwidth ha ve all been impro ved in this latest generation. T he po wer supplies are larger, with fast rectifiers gating to larg er capacitor banks .
5 XA30.5 Owner’ s Manual SET UP X amplifiers r un at about the same pow er as their output rating, and XA amplifier r un more than twice that. The heat sinks on the side of the amplifier r un hot to the touch – about 25 to 30 degrees C. abov e ambient, so you can expect 50 to 55 degrees C.
6 XA30.5 Owner’ s Manual The amplifier’ s voltage and cur rent rating are indicated on the rear panel. It will be either 230 v olts, 115 v olts or 100 volts . T he larger amplifiers have a circuit break er of the appropriate capacity . The smaller power amplifiers use a slo w-blow 3A G type fuse .
7 XA30.5 Owner’ s Manual So the amplifier is sitting there unconnected. Make sure that the rear panel po wer switch/break er is off (down). Plug the A C cord into the back of the amplifier , and then into the wall. Then tur n the po wer switc h/breaker on (up).
8 XA30.5 Owner’ s Manual XLR. If you re-install the jumper incorrectly or leav e it lying about, the amplifier will not w ork properly , and you will be able to tell. Choose either XLR or RCA inputs . If you r un both at once from different components , the sound is not likely to be optimal, but it shouldn ’ t cause damag e anywhere .
9 XA30.5 Owner’ s Manual should never occur in real life . This is a ver y rare occurrence, and w ould indicate a serious problem. Interconnects and Speaker Ca bles W e hav e a g eneral recommendation about interconnects , and speaker cables: They should cost less than the amplifier , and contain at least some conductiv e material.
10 XA30.5 Owner’ s Manual ther mal cycles , but we can sa y that we hav e had amplifiers operating in the field in ex cess of 20 years with no par ticular mortality , and we don ’ t hav e g ood infor mation beyond that. More to the point, you should not w or ry about it.
11 XA30.5 Owner’ s Manual XA30.5 SPECIFICA TIONS Obtained after 1 hour war m-up , with regulated 115 V A C pow er line. Gain 26 dB Freq. R esponse -3 dB at 1.5 Hz, -2 dB at 100 kHz P ow er Output P ow er Output P ow er Output 30 watts @ 8 ohms , 60 watts @ 4 ohms Distortion @ 1 KHz .
12 XA30.5 Owner’ s Manual W ar ranty Infor mation All P ass Laboratories products purchased new from an authorized P ass Laboratories dealer in Nor th America are co vered by a transferable, limited 3-year w ar ranty . This war ranty includes parts and labor charges incur red at the repair facility .
13 XA30.5 Owner’ s Manual W ater and moisture: Electrical devices should not be used near water ( as per example , near a bathtub , washbasin, kitc hen sink, laundr y tub , wet basement or swimming pool ).
An important point after buying a device Pass Labs Amplifier (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Pass Labs Amplifier yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Pass Labs Amplifier - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Pass Labs Amplifier you will learn all the available features of the product, as well as information on its operation. The information that you get Pass Labs Amplifier will certainly help you make a decision on the purchase.
If you already are a holder of Pass Labs Amplifier, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Pass Labs Amplifier.
However, one of the most important roles played by the user manual is to help in solving problems with Pass Labs Amplifier. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Pass Labs Amplifier along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
