Rupert Neve Portico 5024 - Quad Mic Amp - Manual (Page 9)

9
5024 is connected.
MIC GAIN
A 12-way precision rotary switch covering from Line (0) and Mic from 0 to 66 dB in 6 dB steps.
TRIM
A continuously variable pot provides +/- 6dB level adjustment on each channel
IN and THRU 1/4” JACKS
These 2 jacks on both CH1 & CH2 are used for DIRECT INJECTION (DI) or INSTRUMENT inputs, and
are simply paralleled and wired together. Inserting a plug into either jack breaks the normal MIC input
and the user has the full range of MIC GAIN and TRIM. These jacks have a 3 mega ohm input impedance
that will provide less loading (better highs) than most DI boxes. The sheer amount of clean gain that is
available makes these inputs extremely versatile.
M-S
For M-S, recording engineers typically use a cardioid pattern for the Mid channel and a Figure 8 pattern
aimed side to side for the Side channel. Generally the most predictable results happen when the two
mics are placed in very close proximity and are of similar design so usually mics that have switchable
patterns or swappable capsules are employed. You can either record the M & S signals directly and
later decode to Left and Right, in which case no not press the MS button, or you can decode to Left and
Right while recording by pressing the MS button. There may be some benefit of recording the M & S
signals directly and then decoding and tweaking the width in the mix, and the 5024 can be used for that
decoding, because it will accept line level signals into the mic XLR inputs if the GAIN switch is in the
zero position and phantom is turned off.
SILK
Much could be written about this feature, suffice to say, that it gives a subtle option to enhance sound
quality in the direction of vintage modules. The silk button reduces negative feedback and adjusts the
frequency spectrum to provide a very sweet and musical performance. We suggest you try it and make
your own judgment.
+48V
Front panel switch makes phantom power available on each microphone input.
POLARITY
Push button inverts the polarity of the signal path. The symbol “Ø” is often used to denote opposite
polarity.
HPF
The high pass filter is a valuable aid in any signal chain but particularly so in a microphone preamplifier.
Signals below the selected frequency (30Hz or 90Hz) can be attenuated at a rate of 12db / octave,
getting rid of building rumble, air handling motor hum etc.
Level Meters
8 Segment peak LED meters on the 5024 provide monitoring for signal level on each channel.