Audiolab 9000A

The Audiolab 9000A is a stereo amplifier capable of operating in three distinct modes: as an integrated amplifier for classic use, as a preamplifier to drive an external power amplifier, or as a simple power amplifier, for example connected to a home cinema processor. This versatility makes it a central component adaptable to very different configurations, whether or not they evolve over time.

The unit stands out with a dedicated phono input for moving magnet (MM) cartridges, with a gain of +53 dB, an input sensitivity of 4.4 mV and an input impedance of 47 kΩ // 100 pF. The signal-to-noise ratio of this phono stage exceeds 80 dB (A-weighted), a level that limits perceptible hiss when listening to vinyl. On output, the maximum voltage reaches 2.3 V with an output impedance of 120 Ω, for a frequency response covering 20 Hz to 20 kHz within ±0.1 dB. Total harmonic distortion remains below 0.0004% at 1 kHz at 2 V, a figure that reflects particularly clean signal reproduction.

This type of amplifier is aimed at a user who wishes to retain scope for evolution in their system: the possibility of starting with an integrated configuration then moving the system towards a separate preamp/power amp arrangement, or integrating the unit into an existing home cinema chain. The presence of a dedicated phono input also appeals to those who own a turntable fitted with an MM cartridge and wish to integrate it without a separate phono stage.

When buying this type of amplifier used, several points deserve particular attention. The volume potentiometer and source selection switches are the first elements to check, listening for any crackling or dropouts during use. The phono stage, which handles low signal levels, is sensitive to component ageing: a check of its correct operation with an MM cartridge is recommended. The input and output connectors, particularly those dedicated to use as a preamp or standalone power amp, should also be examined to ensure there is no oxidation or mechanical play.

• Dimensions: 444 x 89 x 342 mm
• Net weight: 9.4 kg

These dimensions and this weight should be taken into account when integrating the unit into a cabinet or hi-fi shelf, ensuring sufficient ventilation given the size of the unit.