Rolls MP13 User Manual

INTRODUCTION

Thank you for purchasing the ROLLS MP13 MINI-MIC Microphone
Preamp. The MP13 uses a servo balanced instrumentation amplifi­er for studio grade performance in a small package. This equates to
a 40db better common mode rejection ratio (CMRR) than transistor
inputs used by most companies on mic inputs. It also means much
lower distortion. The clearer sound with more “air” puts the MP13 in

a class with much higher priced units.

your favorite dynamic or condenser microphone

... anywhere you need a clean preamplifier for

- Broadcast

- Studio

- Home

WARRANTY
For compete information on the Rolls 1 Year Warranty, and to regis­ter this product, see our website at www.rolls.com.

FEATURES

- XLR and 1/8” Mic Inputs

- XLR and 1/4” Outputs

- Gain Control

- Clip LED indicator

- 1/4” Output Drives Stereo Headphones

- +21 Volt Phantom Power - available for 1/8” microphones

DESCRIPTION

INPUT: 1/8” (3.5mm) and female XLR jack for signal input.
OUTPUT: 1/4” and male XLR jack for signal output. May be
connected to stereo headphones for personal monitoring.
POWER: Sleeve positive barrel jack for connection to the AC
power adapter.

GAIN: Controls the amount of signal increase to the MP13.
CLIP: LED for indicating circuit clipping. Indicates distortion
is possible.
PHANTOM POWER: When pressed in, applies +36 volts of
phantom powering to the XLR input.
PWR: LED for indicating power is applied to the MP13.

SCHEMATIC

MP13 MINI-MIC PREAMP

MICROPHONE PREAMP

- XLR and 1/8” Inputs

- XLR and 1/4” Outputs

- Gain Control

- Clip LED indicator

- +21 Volt Phantom Power

MP13 Mini mic Preamp

MP13 Mic Preamp

MP13 Mic Preamp

MP13 Mic Preamp

The MP13 is designed to provide simple, inexpensive microphone
preamplification for a variety of applications. The unit has both XLR
and 1/4” inputs and outputs, a single Gain control with a Clip LED
indicator, and Phantom powering is included for use with a con­denser microphone. The 1/4” output is specially designed for use
as either a mono unbalanced output, or a stereo headphone output.

SPECIFICATIONS

Connectors: Inputs; XLR, 1/8” (3.5mm) TRS balanced Mic In
Outputs: XLR balanced, 1/4” unbal. Aux/Hdphn
Input Impedance: 10K Ohms bal, unbal.
Max Input Level: +4 dBV XLR bal, +10 dBV unbal.
Max Gain: 60 dB/XLR, 54 dB 1/4”
Phase Shift: <10 deg. 20 Hz - 20 kHz
EIN: -108 dB max.
THD: <.01%
IMD (SMPTE) <.01%
CMRR: > 80dB
Phantom Power: +21 Volts, 6 mA
Power: 12 VDC adapter
Weight: 1 lbs (.45Kg)
Size: 3.4” x 4.2” x1.4”

Rolls Corporation
Salt Lake City, UT
2/02