Midas 502 User Manual

16 17Quick Start Guide500 SERIES MICROPHONE PREAMPLIFIER 502
(6)
Low pass  lter IN switch - The IN
switch next to the low pass control
knob inserts the low pass  lter into the
signal path, post input-gain and pre
output-trim control. The switch’s yellow
LED illuminates to show that the LP  lter
is active.
(7)
Phase reverse Ø switch - When this
switch is selected, the signal phase is
reversed by 180°. The switch’s green LED
illuminates to show that Ø reverse is on.
(8)
High pass  lter control - This knob
adjusts the high-pass  lter frequency in
the range 10 Hz to 400 Hz (-3 dB points).
Starting at 10 Hz, turn the control
gradually clockwise to remove any
unwanted low frequency content.
(9)
High pass  lter IN switch - The IN
switch next to the high-pass control
knob inserts the high pass  lter into the
signal path, post input-gain and pre
output-trim control. The switch’s yellow
LED illuminates to show that the HP  lter
is active.
(10)
TX switch - By default, the audio output
driver is the classic MIDAS electronically
balanced output as used on most MIDAS
mixing consoles. This gives a very
clean signal, even at very high signal
levels. When the TX switch is selected,
the electronically balanced output is
replaced with a discrete transistor-driven
transformer balanced output stage.
The transformer adds all the bene ts of
galvanic isolation and gives a vintage
sound. It has been selected so that if
driven hard, it can be saturated at lower
frequencies to add colour if desired. The
TX switch’s green LED illuminates to show
that the transformer output is enabled.
Note: The output levels of the electronic
and transformer outputs are matched to
allow true A-B comparisons.
(11)
Rotary output level meter - The
precision 11-segment peak-reading rotary
output meter has a range from -20 dBu to
+20 dBu in 4 dB steps. The meter reads the
output signal level to allow precise setting
of the output trim control.
(12)
Output trim control - This rotary
output trim potentiometer gives precise
control of the output signal level. It has
a range of +/- 20 dB with a 0 dB centre.
When used in conjunction with the input
gain control, the total maximum gain is
+80 dB, more than enough for low level
ribbon microphones etc. In addition,
the output trim control can be used to
control colouration, the mic input gain
can be increased to take advantage of
the overload tolerant MIDAS mic amp,
the output trim can be turned down to
prevent the output level running too high.
Alternatively the output trim control can
be set high to allow output transformer
saturation when the TX switch is selected.
Controls

Midas 502 Specifications

General

Brand	Midas
Model	502
Category	Amplifier
Language	English