Input Stage: Balanced Tranformerless
Input Impedance: 1500 Ohm Balanced
Output type: Balanced Solid state
CCMR: better than 80dB
Frequency range: 1Hz to 700KHz
Maximum system level: +30dB
Min gain: +9dB
Max gain: +93dB
Output Impedance: less than 30 Ohm
High pass filter type: 12 dB /Oct
Frequencies: 20 - 800 Hz
Mechanical: Hot swappable VPR series.
General: mechanical specification
as provided by API.
Power requirement: +/- 16 to 18V (VPR series only)
Current consumption: 35mA
where it is
Gilberto Gil, Rio de Janeiro, Brazil
Black Diamond Concert Hall, Copenhagen
mx20vpr - 500 series danfield sonic heaven
We made history
In 2008 we were honored to be one of the first companies to be accepted as a member of the VPR Alliance - a design co-operation created by API, so that other companies can build modules that electronically conform to the popular range of API 500 series rack systems.
It was also the very first transformerless microphone pre-amplifier to be approved within the VPR Alliance and the first from a European approved manufacturer.
The design of the mx20vpr is based upon our famous mx20 transformerless rack system, originally designed for classical tracking applications.
Danfield Audio has respected the impeccable design credentials of the API brand - and so has kept the aesthetics of the system low key, so that it fits seamlessly and immaculately into an existing 500 series system. Danfield Audio has also taken great care in choosing a design philosophy based upon low power consumption.
It is designed for the engineer who wants absolute signal transparency when multi-tracking with quality studio microphones. The front layout is like all Danfield Audio products - very simple and user friendly.
The mx20vpr module is fully hot-swappable during operation. This is very useful in live recordings, where downtime is unwanted.
The technical performance of the design is impressive. The headroom and slew rate are in the premier league of world class pre-amplification. The frequency range is an astounding 3 Hz to 700 KHz and is
designed to offer extremely wide signal capture. These figures are very flat within +/- 1 dB. The Gain pot is an ultra high performance 24 stage calibrated switch. Overload is illuminated with a red LED. The High pass filter is variable from 20 to 800 Hz for very accurate and wide range 12dB/oct filtering. Check it out!