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Related Manuals for Pass Laboratories Volksamp Aleph 30
Summary of Contents for Pass Laboratories Volksamp Aleph 30
- Page 1 Volksamp Pass Aleph 30 Owner's Manual...
- Page 2 Most amplifiers on the market have between five and seven gain stages in series between the input and the output. The Aleph 30 has but two, and enjoys a very direct path from input to output, further enhancing the purity of the circuit and the resulting sound.
- Page 3 One of the biggest differences in the Pass Aleph 30 is the type of chassis and heat sink used. The Aleph 3 was machined entirely from aluminum extrusions stock. While this resulted in a unique and very functional appearance, it had several drawbacks.
- Page 4 Setup The amplifier has four sets of connections and one switch: The first connection and switch is the AC line power system. The amplifier's voltage and current rating are indicated on the bottom. It will be either 240 volts, 120 volts, or 100 volts, all with a 3AG slow blow type fuse. The frequency rating of the AC line source is 50 to 60 Hz.
- Page 5 usage, you will begin to have semiconductor and other failures between 10 and 50 years after date of manufacture. Later, the sun will cool to a white dwarf, and after that the universe will experience heat death. Pass Product Philosophy and Design Theory When I started designing amplifiers 25 years ago, solid state amplifiers had just achieved a firm grasp on the market.
- Page 6 considered a part of the result. Everything that has been done to the signal is embedded in it, however subtly. Experience correlating what sounds good to knowledge of component design yields some general guidelines as to what will sound good and what will not: 1) Simplicity and a minimum number of components is a key element, and is well reflected in the quality of tube designs.
- Page 7 One of the most interesting characteristics of air is its single ended nature. Sound traveling through air is the result of the gas equation PV 1.4 = 1.26 X 10 4 where P is pressure and V is volume, and whose curve is illustrated in fig. 1. The small nonlinearity which is the result of air's characteristic is not generally judged to be significant at normal sound levels, and is comparable to the distortion numbers of fine amplifiers.
- Page 8 stages known as push-pull, where a "plus" side of an amplifier alternates operation with a "minus" side. Each side of a push-pull amplifier handles the audio signal alternately; the "plus" side supplying positive voltage and current to the loudspeaker, and the "minus" side supplying negative voltage and current.
- Page 9 As the Pass Aleph 30 idles at four times its rated output, I think we can safely think of it as “pure”. Designs that vary the bias against the musical signal will generally have bias currents at or below the signal level. This is certainly an improvement from the viewpoint of energy efficiency, but the sound reflects the lesser bias point.
- Page 10 Mosfets provide the widest bandwidth of solid state power devices, however they were not chosen for this reason. The design of the Aleph 30 does not seek to maximize the amplifier bandwidth as such. The capacitances of the Mosfets provide a natural rolloff in conjunction with the resistive impedances found in the circuit, and the simplicity of the circuit allows for what is largely a single pole rolloff characteristic.
- Page 11 The amplifier is stable into any load impedance or reactance including a direct. The Aleph 30 is impervious to electrostatic shock at the input and dead shorts at the output. You can safely plug and unplug inputs and outputs while the amplifier is running. (Do not try this with other products).The Aleph 30 is protected from overheating by a 75 degree C.
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Page 12: Specifications
SPECIFICATIONS Gain 20 dB balanced, 26 dB single ended Freq. Response - 0.5 dB @ 2 Hz, -1.5 dB @ 100 KHz Power Output 30 watts/ch @ 8 ohms, 40 watts @ 4 ohms Maximum Output 25 volts, 5 amps Distortion (1KHz) 0.2% @ 30 watts, 8 ohms...