Audio Engineering Associates RP48Q Operating Manual - page 4
1
2
3
1
2
3
XLR Mic Inputs
(Use One Only)
DC
AC
Phantom
Capable
+48 V
Phantom
On / Off
7
11
15
20
24
28
32
36
40
45
50
55
+7 dB
+55
18
360
85
Hz
Low Cut
Filter
High
Boost
26
kHz
2.1
kHz
9
kHz
+18
+0
Peak
dB
Boost
+19
+0
+6 dB
1
2
3
Balanced XLR Out
(Pin 2 High)
Max Gain: +80 dB
600
Unbalanced
1/4” Jack Out
Max Gain: +74 dB
Level LEDs
Red snaps on at +20 dBu
Yellow brightens from 0 to +20 dBu
Green snaps on at -5 dBu
RP
48
Q
Single Line (one channel shown)
Ribbon Preamp
with
P48 and Curve Shaper
Minimum path, high gain and impedance, fast transient recovery JFET preamp
The DC mic input shuts down automatically if external phantom power is applied.
No
Phantom
Input Gain
Output Gain
+8 dB
Curve Shaper
Input Connections
Ribbon microphones, moving-coil dynamic microphones, and any other microphones that do not use
phantom power to operate normally should be connected to the DC-coupled inputs (ref. #16). Alterna-
tively, they may be connected to the AC-coupled inputs (ref. #17), but make certain that the Phantom
Power switch (ref. #1) is OUT/OFF before and while they are connected to prevent possible damage to
the microphones.
1
Condenser microphones or powered ribbon microphones that require P48 phantom power should be
connected to the AC-coupled inputs (ref. #17), and the Phantom Power switch (ref. #1) should be
IN/ON. Each input is capable of providing full-spec 10 mA current to the microphone under any load
condition.
Depending on the types of microphones being used, it is not necessary to use the same type of input
for each channel: choose the input that is best suited for each microphone. The low frequency response
of the DC-coupled input is -3 dB
impedance of both inputs is > 10 k
Ω. Polarity is: pin-1, ground; pin-2, high; pin-3, low.
Use only one input per channel. Do not use both inputs for any channel at the same time.
When using lower output microphones, such as ribbons, best performance will be achieved if the
cables between the mics and the preamp are as short as possible. This will minimize any noise pick-
up by the cables. Just place the preamplifier near the base of the microphone stands, and then run the
Figure 3: AEA RP
48
Q Single Line Diagram (one channel shown)
1
The DC-coupled inputs are protected from 48V phantom power. If phantom power is applied, the input circuit shuts down
until the phantom power is removed.