Lehmann Audio Silver Cube
Phono preamplifier from the German brand Lehmann Audio, designed for vinyl enthusiasts seeking a refined sound reproduction.
Description
The Silver Cube is a phono preamplifier designed by Lehmann Audio, a German manufacturer specialising in high-end audio electronics. This device sits between a turntable and an amplifier: it amplifies and corrects the signal from the cartridge according to the RIAA equalisation curve, an essential step in correctly reproducing music engraved on a vinyl record.
The source data sheet does not provide any specific technical specifications for this model: no gain, input impedance, input type (MM or MC), connectivity, or dimensions are specified. This is therefore a general presentation of the product, with no verifiable technical data to report.
This type of phono preamplifier is aimed at turntable owners who wish to separate the phono stage from their amplifier, or who use an amplifier or headphone amplifier without a built-in phono input. It suits a setup where one seeks to isolate this function in order to improve its quality compared with an entry-level built-in phono stage.
What to check before buying used
An unusual hum or hiss from the cartridge often points to a tired phono stage or an ageing power supply capacitor, worth checking with the cartridge normally used. Also check the gain and loading selector, if present, whose contacts can oxidise over time and cause crackling. Finally, inspect the input and output RCA connectors as well as the casing shielding, which ensure a signal free from unwanted hum.
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