Benchmark MPA1 Bedienerhandbuch

Benchmark MPA1 Instruction Manual 2-Channel Microphone Preamplifier

MPA1 Instruction Manual Page 10 LED Output Level Meters Each preamp channel is equipped with a four-segment LED output level meter. The LED’s are dr

MPA1 Instruction Manual Page 11 HPA2™ Headphone Output The output of each channel’s preamp is directed to the headphone amplifier, Benchmark’s signa

MPA1 Instruction Manual Page 12 Rack Mounting There are multiple solutions for rack-mounting the MPA1. An optional Rack-Mount Coupler allows the mou

MPA1 Instruction Manual Page 13 Performance Graphs Frequency Response Audio Precision02/19/07 11:33:00PRE420 - Frequency ResponseColorSweep Trace Li

MPA1 Instruction Manual Page 14 High-Pass Filter - Frequency Response Audio Precision02/19/07 11:33:00PRE420 - Frequency ResponseColorSweep Trace L

MPA1 Instruction Manual Page 15 Inter-Channel Phase Response Audio Precision02/19/07 11:35:37PRE420 - Inter-Channel Phase Response-1+1-0.9-0.8-0.7-0.

MPA1 Instruction Manual Page 16 THD+N vs. Frequency Measurement Bandwidth = 10Hz to 80 kHz, Gain = 30 to 60 dB, Output Level = +4 dBu Audio Precision

MPA1 Instruction Manual Page 17 Wideband THD+N vs. Frequency Measurement Bandwidth = 10 Hz to 500 kHz, Gain = 30 to 60 dB, Output Level = +4 dBu Audi

MPA1 Instruction Manual Page 18 Equivalent Input Noise vs. Gain The above plot shows the Equivalent Input Noise (EIN) of the MPA1 as a function of g

MPA1 Instruction Manual Page 19 Noise Spectrum 32k B-H FFT, Gain = 60 dB, 0 dBr = 0 dBu at input Audio Precision02/19/07 11:27:19Noise Spectrum, Gain

Safety Information Voltage Selection CAUTION: THE FUSE DRAWER INCLUDES A VOLTAGE SELECTION SWITCH WITH TWO SETTINGS: “110” AND “220”. CHECK TO SEE THA

MPA1 Instruction Manual Page 20 THD Spectrum at 1 KHz Audio Precision02/21/07 09:43:491 kHz FFT at 60 dB Gain, Output Level = +24 dBu, 0 dBr = +24 dB

MPA1 Instruction Manual Page 21 THD Spectrum at 10 KHz Audio Precision02/19/07 11:09:3010 kHz FFT at 60 dB Gain, Output Level = +24 dBu, 0 dBr = +24

MPA1 Instruction Manual Page 22 Specifications Microphone Preamps Number of Preamps 2 Connectors Gold-Pin Neutrik™ female XLR with direct ground f

MPA1 Instruction Manual Page 23 Direct Outputs Number of Outputs 2 Connectors Gold-Pin Neutrik™ male XLR with direct ground feature Output Impedan

MPA1 Instruction Manual Page 24 LED Output Meters and Gain Indicators Output Meters 4-LED Meter (per channel) Output Level Indicators +28 dBu (red

MPA1 Instruction Manual Page 25 Dimensions Form Factor ½ Rack Wide, 1 RU High Depth behind front panel 8.5” (216 mm) Overall depth including knobs

MPA1 Instruction Manual Page 26 Regulatory Compliance FCC Notice (U.S. Only) RoHS Compliant Information NOTICE: This equipment has be

MPA1 Instruction Manual Page 27 CE Certificate of Conformity

MPA1 Instruction Manual Page 28 Warranty Information The Benchmark 1 Year Warranty Benchmark Media Systems, Inc. warran

MPA1 Instruction Manual Page 29 Benchmark Extended Warranty The Benchmark Extended 5* Year Warranty Benchmark Media Systems, Inc. optiona

ContentsSafety Information 2 Voltage Selection 2 Repairs 2 Fuses 2 Modifications 2 Contents 3 Overview 4 Features 5 Connections 6 Microphone

MPA1 Instruction Manual Page 30 Calibration CAUTION: ROUTINE CALIBRATION SHOULD NOT BE REQUIRED. THE FOLLOWING PROCEDURE SHOULD ONLY BE USED BY A QU

MPA1 Instruction Manual Page 4 Overview The MPA1 is a 2-channel microphone preamplifier that is designed to achieve the highest performance availab

MPA1 Instruction Manual Page 5 Features • Two Transformerless Microphone Inputs • Two Balanced Direct Outputs (XLR) • Monolithic Low-Noise Transi

MPA1 Instruction Manual Page 6 Connections Microphone Inputs (L and R) The balanced transformerless microphone inputs use locking Neutrik™ gold-pin

MPA1 Instruction Manual Page 7 Output Signal Levels The maximum output level on the balanced outputs is +27.5 dBu. Each channel’s output can be monit

MPA1 Instruction Manual Page 8 Preamp Section Preamp Overview Each preamp channel includes switches for phantom power, polarity, and 40 Hz high-pass

MPA1 Instruction Manual Page 9 Phantom Power Switches Up = Phantom On Down = Phantom Off CAUTION: ALWAYS TURN OFF PHANTOM POWER AND WAIT SEVERAL SECO