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In the Forum: Horn-Loaded Speakers
In the Thread: SS Amplification for Compressions drivers? Sound?

Post Subject: CA10 Operator's ManualPosted by jessie.dazzle on: 11/8/2010

Romy wrote:
"... I can’t open PDF file..."

Here's the part of the Manual that covers design features and specs (no circuit diagram available):

Introduction
The CA10 is a 10 watts per channel Class-A stereo power amplifier capable of great musicality and
realism.The amplifier is able to reproduce the body and soul of music like some of the good vintage
designs, but also achieves fidelity characteristics of modern devices.
And in deed, parts of the CA10 circuitry are based on the classical topologies of the 60ies and 70ies
of the previous century. Other parts of the circuitry are typically modern style.
The mixture of modern and classical topologies in conjunction with carefully selected transistors and
their appropriate points of operation leads to a different sound pattern than usually found in solid
state amplifiers.

Design Features
Measured/Matched Semiconductors: All semiconductors used in the CA10 are measured to
certain criteria. This is very time consuming, but necessary to achieve the intended performance
of the amplifier.

Selection of Parts
The CA10 uses the best sounding and quality parts available regardless of
costs. All components have been auditioned for performance and consistency in endless listening
tests.

Low Noise Power Supply
The power supply of the amplifier is divided into two sections. The
first part is built from an encapsulated toroidal transformer followed by a 35 ampere bridge rectifier
and a large C-R-C filter. The second part of the power supply is an active regulated on-board
circuitry with excellent transient response and a deep ripple suppression (-120dB!).
Slow Turn On Sequence: The CA10 has no sound sophisticating relays in the outputs. To prevent
turn-on thumps the operating voltage is risen slowly (20sec.) by the power supply.
Connecting a delicate driver directly to the outputs should not present any hazard.
In case the source is still playing music while the amp has been switched off, you can still hear more
or less distorted music. That is normal and the price one has to pay for the absence of a relay.

Specifications
Voltage Gain: 24 dB
Input Sensitivity: 0.55 V
Output Power: 10 Watts/ch 8 Ohms; 8 Watts/ch 4 Ohms
Frequency Response: -3dB at 5 Hz, 150 kHz
Distortion: (1kHz) < 0.02% at 1 Watt, 8 Ohms (mainly 2. harmonics)
Input Impedance: 100 kOhms
Internal Resistance: < 200 mOhms
Output Noise: < 1 mV, unweighted, DC-100 kHz
DC Offset: < 5 mV
Power Consumption: 150 Watts continuous
Measurements: 17.7" W x 13.4" D x 5.5" H (450x340x140mm)
Weight: 32 lb (14.5kg)

jd*

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