Audio Engineering Associates RP48Q Operating Manual Download Page 9

higher.
• Output Gain control: continuously variable from +0 dB to +19 dB of additional output gain, follow-
ing the Curve-Shaper circuitry
• Switched LF Shelving filter: -3 dB break-frequency tunable from 18 Hz to 360 Hz; maximum reduc-
tion -20 dB
• Switched Curve-Shaper  and HF Boost: +3dB break-frequency tunable from 2.1 kHz to 26 kHz; HF 
gain adjustable from +0 dB to +18 dB; the slope of the HF filter varies interactively and directly with 
the Curve-Shaper and HF gain settings
• XLR output maximum level into 600

Ω

 load: +28 dBu, balanced; +22 dBu, unbalanced; 

0 dBu = 0.7746 V rms
• TRS output maximum level into 100 k

Ω

 load: +22 dBu, unbalanced; 0 dBu = 0.7746 V rms

• Recommended load for the unbalanced output: > 10 K

Ω

• XLR connectors polarity: pin-1 is ground, pin-2 is high, pin-3 is low
• TRS connector polarity: tip is high, ring is tied to ground, sleeve is ground
• LED signal level indicators: green snaps on at -5 dBu, red snaps on at +20 dBu, and yellow varies in 
brightness with level from 0 dBu to +20 dBu—all referenced to the unbalanced output.

Physical

• 1 RU steel and aluminum chassis: 17.25” w, 11” d, 1.7” h (44 cm x 28 cm x 4.3 cm)
• Weight: 6.75 pounds (3.1 Kg)
• Silkscreened front and back panel markings and top panel block-diagram
• Metallic blue and steel gray powder-coat finish
• Detachable rack-ears included
• All rotary potentiometers detented at 12:00 o’clock position
• Grayhill series 71 stepped gain switch
• Internal torroidal power transformer with linear regulators
• Male recessed IEC AC MAINS connector with integral fuse holder: 160 mA slow-blow for 120 VAC 
operation; 80 mA slow-blow for 240 VAC operation. Factory wired internally for input voltage.

Specifications and details subject to change without notice

.

WARRANTY

Audio Engineering Associates warrants the AEA RP

48

Q against defects in materials or workmanship 

for one (1) year from the date of purchase. For repairs to units exhibiting abnormal physical damage or 
that are out-of-warranty, AEA will provide a repair estimate and will not proceed with service without 
the customer’s authorization. Repairs will be performed at AEA’s headquarters in Pasadena, CA. Ship-
ping and insurance costs both ways are the responsibility of the customer. Please contact AEA prior to 
sending the unit in for repair.

No user serviceable or adjustable parts inside. Do not open the case.

Summary of Contents for RP48Q

Page 1: ...eed phantom power such as ribbon moving coil or self powered condenser microphones or AC coupling with switchable full spec P48 phantom power for phantom powered condenser or ribbon microphones Bypass...

Page 2: ...nserts the Curve Shaper circuitry 8 Curve Shaper Tuning control this continuously variable control adjusts the 3dB break frequen cy from 2 1 kHz to 26 kHz 9 HF Gain control this continuously variable...

Page 3: ...inputs with each channel at a time Note 2 Connector polarity XLR pin 1 is ground pin 2 is high and pin 3 is low TRS tip is high ring is tied to ground sleeve is ground Note 3 No user serviceable or ad...

Page 4: ...ge 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...

Page 5: ...ctly at the output of the RP48Q If your system requires telescoping the shield 3 it is recommended that the shield be disconnected at the output of the RP48Q and connected at the input to the next dev...

Page 6: ...the soundsource is at its loudest If the LED is illuminated too often or too long reduce the Input Gain control one step at a time until the Red LED illuminates only brie y at the loudest peaks Once...

Page 7: ...f ciently but the low frequency content of the program remains unaffected you have achieved your goal Using the Curve Shaper and HF Gain The RP48Q features a unique Curve Shaper circuit that enables y...

Page 8: ...lanced out Noise gure rms A weighted 2 dB Noise gure rms unweighted 3 dB 20 kHz LPF bandwidth EIN 128 dBu A weighted 150 W resistive source Frequency response 3dB 1Hz and 200 kHz THD 0 02 at 1 kHz Bal...

Page 9: ...chassis 17 25 w 11 d 1 7 h 44 cm x 28 cm x 4 3 cm Weight 6 75 pounds 3 1 Kg Silkscreened front and back panel markings and top panel block diagram Metallic blue and steel gray powder coat nish Detacha...

Page 10: ...ci cally designed for close micing and guitar Studio Microphone Stands and Booms Modular Microphone Positioners and Decca Trees Since 1983AEA has imported and serviced the Coles 4038 studio ribbon mic...

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