DACS Audio MicAmp - Manual (Page 2)

Instructions for use and installation
Welcome
At DACS we are very pleased that you have chosen to purchase one of our
products. We take pride in our work and are sure that this MicAmp will give you
years of exemplary service. If you have any suggestions or comments about this
product please call, fax, write or e-mail us with your thoughts. Thank you.
Introduction
The MicAmp is an ultra low noise microphone amplifier. It uses three super
matched pairs of transistors for the main gain stage, giving low noise performance
and very fine detail, even at very low input levels. The frequency response is flat
down to below 1Hz at the bottom (DC for non phantom powered microphones)
and does not start its tailored high frequency roll-off until above 45kHz. The
CMRR is hand trimmed at mid and high frequencies to very high tolerances.
Each channel has an eight position self cleaning rotary switch to set gain in 6dB
steps from 20dB to 62dBd. There is then a gain trim from 0dB to +10dB, and a
three position bass roll off filter giving a flat response and two cut-off points at a
nominal 80Hz and 30Hz. The cut-off point and slope of the filters have been
chosen to give a smooth response while removing very low rumble (30Hz) and
more mains type noise (80Hz). In addition they have no effect above their cut-off
frequency. The balanced output is a fully floating servo type output, with hand
trimmed balance set to +/-1% accuracy delivering up to +22dB into 600R.
Working with the MicAmp is straightforward. Settings are easily repeatable due to
the stepped gain and detailed scaling on the trim control. There is ultra fast
protection on the input so that any fault condition immediately triggers the
protection circuitry preventing damage to the amplifier circuitry.
icAmp M
DACS LTD, Stonehills, Shields Road, PELAW, Gateshead, Tyne and Wear NE10 OHW
Tel:+44 (0) 191 4382500 | Fax: +44 (0) 191 4382511 | www.dacs-audio.com | [email protected]