Nina is a tube tape head preamp using the excellent 6922/E88CC family triode and is designed for use with most reel to reel tape decks, consumer or pro.
The preamp circuit is a ground up design by our partner, the renowned tube circuit guru Ray Waters. His brilliant circuit has been mated with our in-house designed regulated solid state power supply.
The result is a fantastic sounding tape head preamp that is able to work with a wide range of playback head impedances.
The VU meters areion calibrated to +3dB @ 0dB VU. This can also be calibrated to +6dB @ 0dB VU on request.
To eliminate hum and other unwanted background noise, the preamp has a gain of 38dB. We use a pair of Lundahl LL1926 SUT at the inputs to increase the input signal level, so that Nina's gain is 55dB.
Input impedance can be varied between 30K and 92K, via a trimmer, depending on the tape head. We set it to 47K unless otherwise requested.
Another unique feature of this design is that Nina can be switched between NAB (7.5 & 15 IPS), IEC 7.5IPS and IEC 15IPS. Or, Nina can be built for IEC only, 7.5, 15 & 30IPS, NO NAB.
The standard version uses unbalanced RCA in and outputs.
As an option, Nina can also be built with Balanced XLR in and outputs using either ultra low noise Audio Differential Line Receivers IC's or the superb Lundahl LL1544A audio transformers. These versions will have no RCA sockets.
An all black anodized chassis is also available.
Nina is built to order and will take around 4-6 weeks to complete and ship.
Nina is a tape head preamp, so it must be connected directly to the decks playback head, NOT the tape deck audio output!
Nina is housed in a custom anodized aluminum 2U rack mounting chassis available in silver or black.