CONNECTING YOUR PREAMPLIFIER
Setting up your Mic EQ-500 COMBO is rather easy.
1. Please refer to page 12 for an illustration of the back of the preamplifier. The following
page shows some slightly more involved examples. On the left end of the back panel is
a standard IEC mains connector. This should be connected to a standard mains outlet
with the supplied cable. This unit has been hard-wired for the mains voltage in your
country
2. There are two main XLR male outputs. The MIC PRE OUT can be used to send the
amplified mic signal direct to tape (without EQ) or to feed compressors and gates. The
LINE OUT is normally the output to the tape machine The pin out for the XLR is as
follows:
PIN1 - ground
PIN2 - POSITIVE going phase (+)
PIN3 - NEGATIVE going phase (-).
3. There are two XLR female inputs. The first is the MIC INPUT. Connect the mic to this.
The second is a LINE INPUT. To use the EQ in a mix use the console INSERTs to feed
a line level signal into the LINE INPUT and return it from the LINE OUTPUT. The
LINE INPUT can also be used to insert a compressor and gate into the signal chain.
4. Power up the MIC EQ-500 COMBO with the gain controls initially set off or low and
with the EQ bypassed.
5. If a dynamic or ribbon mic, tube condensor mic or passive DI is used then PHANTOM
should be OFF. If a solid state (FET) condensor mic is used then the PHANTOM
switch may have to be turned on. This switch must be gently pulled before toggling.
This is a safety switch meant to protect your speakers, recordings, mics and input
transformer. If the 48 volt phantom power is fed into a unbalanced line or shorted mic
cable then you risk damaging the input transformer. Manley Labs uses the technique of
feeding the 48 volts into the center tap of the bifilar wound input transformer. While
this may occasionally damage the transformer or current limiting resistor in a mis-wired
situation, it allows certain mics to truly reach their potential sound-wise.
6. Select MIC or LINE on the toggle switch depending on the set-up, turn up the LINE
GAIN to 12:00 and slowly turn up the MIC GAIN until the meter reads just under the
red area or 0 VU.
7. If EQ is desired, switch from BYPASS to EQ IN and adjust the dB and FREQUENCY
and SHELF as needed.
8. Final adjustment of levels should be trimmed while looking at the tape recorders meters
or console meters and by ear. While the VU meter on the unit is of good quality and
calibrated, digital recording goes hand in hand with PEAK meters. VU meters while
standard for analog recording are not a guarantee that the recording will be clean.
Percussive sounds with lots of highs are very good candidates for a lower recording
level.
The following page has diagrams of typical set-ups.
(11 pages)
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