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Kraken Range Navigation

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Alchemist Kraken APD7 Pre Amplifier
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Alchemist Kraken APD7A MkII Pre Amplifier
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Specifications | Images | Downloads | Design | Servicing | 2nd Hand Market

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S    P    E    C    I    F    I    C    A    T    I    O    N    S

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Frequency Response @ 0.8V Output (0dB):   Flat 20Hz - 55kHz (-3dB @ 105kHz)
Channel Separation:   >90dB
Distortion: 1kHz @ 1V o/p:   <0.1% THD
Distortion: 20kHz @ 1V o/p:   <0.3% THD
Residual Noise:   <2mV
Power Consumption:   15 Watts
Dimensions (W x H x D):   320mm x 85mm x 250mm
Weight (Packed):   8.5kg

(Based on Kraken APD7a MkII)

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Downloads:
Kraken mk1 brochure (6.13MB) | Kraken mk2 brochure (3.97MB) | APD7/8 review (What Hi*Fi?, Mar 93) (2.29MB) | Instructions
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Design:
The Kraken Pre amp MkII has four line level inputs and two tape loops. The MkI had only five inputs in total (four line and one loop). The additional input gave greater flexibility and, in both designs, one of these could be upgraded with a plug in MM phono stage.

Other changes between Mk1 and 2 include the use of a fashionable blue power LED and a thicker, contemporarily styled, aluminium front panel, along with the inclusion of the distinctive heat-sync fins which, whilst unneccessary for the pre-amp design, created a superior style match with the Kraken Power Amplifier and other Kraken series components.

The pre amp was designed to be used alongside the Kraken Power Amplifier.

Tonally the original Kraken amplifiers has a "softer" sound - the high frequency roll-off was set to come in earlier - compared with the later model.

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Servicing:
DO NOT ATTEMPT ANY WORK YOURSELF UNLESS YOU ARE COMFORTABLE WITH ELECTRONICS AND KNOW WHAT YOU ARE DOING

Popular tweaks seen on the Internet:

  • Change the Philips O/P amps for Burr Brown OPA 132P types
  • Improve the internal cabling from the volume control
  • Upgrade the eight Philips capacitors with polypropylene metalised types
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2nd Hand Market:
Original selling price: 499.95 - 549.95
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