Lehmann Audio Black Cube Buffer

Lehmann Audio Black Cube Buffer

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The name Lehmannaudio has long become synonymous for producing cost effective state of the art audio electronics. The Black Cube Buffer is a high end cable driver that satisfies the highest demands and is the solution for practically all problems with long cables or different levels. Many music lovers have an affinity to puristic concepts like the so called passive preamps. Although there are certain qualities, these setups are facing problems with long cables. The sound is often too soft and weak. Highs lack transparency and bass impact is also dissatisfying. This is mainly caused by a high source impedance of the passive attenuators. Due to the low impedance output driver circuit realized as high current Class A design without global negative feedback the music flows unaltered, artefact free and with all its inherent energy to the next following input. Another application is the field of biamping where low efficiency woofers are combined with much higher efficiency midrange drivers and tweeters like for example horn systems. In many cases the gain reserve for the woofer is insufficient. Here the Black Cube Buffer can be effectively used for level optimization. Weak output stages of any line sources can greatly benefit from this unit. Especially variable outputs of CD-players are very often dimensioned inferior. This is mostly the reason why a seemingly puristic combination of CD-player, power amp and speakers is sounding dis-satisfactory in so many cases. With the Black Cube Buffer such setups can turn into highlights!

Input impedance: 47 KOhms
Maximum gain: 0dB, 10dB, 20dB
switchable underneath
the unit
Maximum input level: 9V at gain 0dB
900mV at gain 20dB
Maximum output level: 9V RMS
Frequency response: 10Hz (-0.3dB)
to 60 kHz (-1dB)
Signal to noise: 95dB at 0dB gain
THD: 0.001%
at 6mW/300 Ohms
Channel separation: 70dB/10kHz

Output impedance: 60 Ohms
Power dissipation: 5W, internal, regulated power supply
Dimensions: 280 x 110 x 44mm≥
(case only)
Connectors (audio): gold plated RCA connectors with Teflon isolation
Weight: app. 1.4 kg


Providing your item is in stock, the order is usually dispatched within 24 hours. Postage and packing is completely free for orders over £100*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.


Orders are sent via our couriers' DPD on a next-day-delivery service and usually, take between 1 and 3 days. 


Please use this link to find more detailed delivery information.


*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however, delivery to these locations will incur a charge and can only be sent via a 2-day service.

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