PCB size: 110x188mm (mono)
thickness: 2. 0MM, plate FR-4 epoxy glass
copper 35UM
with balanced and unbalanced option switch
Harga : Rp 150.000,- (2pcs boards/stereo)
contact : 08161371018
SPECIFICATIONS
Gain 15 dB bal in / bal out 15 dB unbal in / bal out
9 dB bal in / unbal out 9 dB unbal in / unbal out
Freq. Response -3 dB @ 5 Hz -3 dB at > 100 kHz
Distortion < .1 % THD typically .01% @ 2 volts @ 1KHZ
Maximum Output 15 volts rms. bal out 8 volts rms. unbal out
Output Impedance 0 - 1000 ohms unbalanced
0 - 2000 ohms balanced
Input Impedance 10 kOhm unbalanced 20 kOhm balanced
CMRR typical -80 Db, 20-20 KHz
Crosstalk typical -90 dB, 20-20 KHz
Output Noise Noise floor < -120 dBV, 20-20 KHz
Power Consumption 25 watts
Introduction
The Aleph P is a single ended Class A audio preamplifier, the first produced by Pass
Laboratories. It combines completely new design thought applied to a traditional topology
and the experience of twenty five years of amplifier design. This manual applies to the
second version of the Aleph P, which incorporated circuit improvements and remote control
operation.
This preamplifier flows from a commitment to create the best sounding product: a simple
circuit with the most natural characteristic. The Aleph P integrates power Mosfet devices
and single ended Class A operation in a simple topology in order to deliver the most natural
sound possible.
The circuitry of the Aleph P breaks new ground in simplicity and performance. Each gain
stage consists of a single Mosfet power transistor operated “common source” mode. One
such circuit amplifies each signal polarity of a balanced input signal, and their operation is
inter-coupled to allow optimal operation with both balanced and unbalanced input signals
while still providing balanced and unbalanced outputs. It retains the important simple singleended
characteristic while operating either single-ended or balanced.
It is unique in providing superior flexibility and performance with balanced and unbalanced
inputs and outputs, converting one to the other as desired without switches or adapters.
The Aleph P absolutely minimizes the number of components in the signal path, and yet
retains exemplary objective performance specifications. More importantly, it pushes the
edge of the art in exploring how much subjective quality is obtainable with a new but very
elementary gain stage.
A very few people are involved in the production of this product. I supervise all phases of
the construction, and I test and listen to each preamplifier myself. If you have questions,
comments, or problems, please feel free to contact me directly.
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