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Related Manuals for Pass Laboratories X1000
Summary of Contents for Pass Laboratories X1000
- Page 1 Pass Laboratories Owner's Manual X1000 / X600 / X350 Page 1...
- Page 2 DC to beyond audibility. They are unconditionally stable into any loudspeaker. If you need even more power, X1000’s can be operated in series and parallel arrays. As a practical matter, we offer peak output levels to 64,000 watts.
- Page 3 20 amp, 120 volt AC line without problems in most cases. The X1000 is provided with a special standard 20 amp power cord that is not like most of the ones you are used to. It is heavier, and mates to a standard receptacle at the rear of the amplifier.
- Page 4 I have to say that we have not seen a failure yet, and are not expecting one. On the X1000 and X600 the two sets of output connectors on the rear panel are in parallel, for the convenience of those who wish to bi-wire their loudspeakers. The red terminal is connected directly to the other red terminal, and so with both black terminals.
- Page 5 The meter has been calibrated to reflect the 600 watts idle draw of the amplifier, which is about one-third full scale for the X1000 and X600, and one-half for the X350. The meter is intended as a general indicator of the status of the amplifier and has not been calibrated to reflect any particular values.
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Page 6: Speaker Interface
If you wish to maximize power or minimize distortion for loads rated below 4 ohms, we suggest that you parallel 2 or more X1000 channels, which will allow multiples of the 20 amp rating. For example, if you desire to achieve 16,000 watts peak into 1 ohm, you will want to use 4 amplifiers in parallel. - Page 7 and the energy reserve held in the capacitors will do its job. As a practical matter, it will not make a lot of difference. Just don’t call us up and complain that you only measured 1900 watts in your living room. If you do, we’ll want to know what speakers can take it. Interconnects and Speaker Cables We have a general recommendation about interconnects, which is that they should cost less than the amplifier.
- Page 8 If you have steel in your chassis, you definitely want to keep your analog wiring and output devices away from it. The X1000 has 8 computer grade (the old large style computer capacitor cans, not the new dinky ones) capacitor cans at 25,000 uF and 75 volts each. These are used to create the unregulated output stage rails at plus and minus 75 volts at 30 amps.
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Page 9: Warranty Information
boards in the amplifier are double sided, with plated through holes and double thickness of copper. So how long will this hardware last? It is my experience that, barring abuse or the odd failure of a component, the first things to go will be the power supply capacitors, and from experience, they will last 15 to 20 years. - Page 10 Supersymmetry: What it is, Where it came from, How it works, Why bother ( theory and philosophy you can skip ) Supersymmetry is the name given to a new type of amplifying circuit, which operates quite differently than the designs presently appearing in literature and the marketplace. I have been designing new amplifiers all my adult life, and patented eight of them, but I regard this particular idea as the most interesting and profound.
- Page 11 nature of the device. So I will state here and now that I consider “no feedback” to be where feedback does not extend further than a single gain device or stage, so that circuits having “local feedback” are still considered “no feedback”. Anybody disagreeing with this should send me a diagram of a “true no feedback”...
- Page 12 sink in it. Now I strive to be like Picasso, who could draw a woman with a single pencil stroke and create a masterpiece. Supersymmetry is not a single pencil stroke, but I am making progress. Its origin goes back to the late 1970’s when I was examining the virtues and faults of so-called “error correcting amplifiers”, an alternative to conventional feedback.
- Page 13 4 ohms. This is accomplished with only two gain stages and no feedback. You want more? We can do that, too. The X1000 can be operated in series and parallel arrays to present multiple values of voltage and current so as to create a huge power/performance envelope direct coupled into virtually any load.
- Page 14 It is similar only in that both terminals of the output to the speaker are “live”; neither of them is grounded. You could in fact “bridge” two X1000’s together to give you an 8 kilowatt peak into 8 ohms. Actually, when bridging two such amplifiers together, we would generally recommend also paralleling yet another pair to get 16 kW peak into 4 ohms, and yet four more for 32 kW peak into 2 ohms, and so on.
- Page 15 On this curve (B) we can clearly see that intrinsic symmetry due to the matching of the two halves reduces the distortion by a factor of 10. Supersymmetry (D) creates a more perfect match, and results in an additional reduction by a factor of 10. However there is essentially no difference in the distortion figures at the output (C) of each half of the circuit considered alone.
- Page 16 X1000 CURVES Page 16...
- Page 17 X600 CURVES Page 17...
- Page 18 X350 CURVES Page 18...
- Page 19 X1000 SPECIFICATIONS All figures obtained after 1 hour warmup, with regulated 120 VAC power line. See manual notes about AC power line regulation. Gain Freq. Response Power Output Distortion Maximum Output Voltage Maximum Output Current Input Impedance Damping factor Slew rate...
- Page 20 X600 SPECIFICATIONS All figures obtained after 1 hour warmup, with regulated 120 VAC power line. See manual notes about AC power line regulation. Gain Freq. Response Power Output Distortion Maximum Output Voltage Maximum Output Current Input Impedance Damping factor Slew rate Output Noise Random noise floor Dynamic range...
- Page 21 X350 SPECIFICATIONS All figures obtained after 1 hour warmup, with regulated 120 VAC power line. See manual notes about AC power line regulation. Gain Freq. Response Power Output Distortion Maximum Output Voltage Maximum Output Current Input Impedance Damping factor Slew rate Output Noise Random noise floor Dynamic range...
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