Description
The Cambridge Audio ALVA SOLO is a phono preamplifier intended to be inserted between a turntable and an amplifier. Its function is to raise the level of the signal from the cartridge, which is too weak to be used directly by a conventional amplifier, before passing it on to the next amplification stage.
According to the manufacturer, the unit has been designed using carefully selected components and materials, with the aim of preserving the subtlety of the vinyl signal rather than altering it as it passes through. The stated intention is to retain the sonic detail present in the groove, without smoothing it out during the amplification stage.
This type of phono preamplifier is aimed at vinyl enthusiasts who wish to connect their turntable to an amplifier without a dedicated phono input, or who are looking to improve on the reproduction obtained with a more basic built-in phono stage. It suits a hi-fi setup where the vinyl source plays a central role.
What to check before buying used
On a phono preamplifier, the RCA inputs and outputs deserve careful checking: oxidised contacts or worn shielding can quickly result in hum or unwanted noise. Also check the gain and impedance selector where the unit has one, as these infrequently used switches can become crackly over time. The associated external power supply should also be tested, as a faulty cable or mains adapter is enough to cut the signal.
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