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MDR Series Mixers
AUX RET AUX SEND
MIC IN MIC IN
L
LEFT/MONO CR OUTPUT
R
RIGHT PHONES
LINE IN LINE IN
3/L 5/L L
30 30
GAIN GAIN LINE IN LINE IN MIX OUTPUT
6/R R
4/R
5 60 5 60
-26 +26 -26 +26
0 0 0 0
2T IN 2T OUT
HF HF HF HF
5 5 5 5 5 5 5 5
12K 12K 12K 12K
10 10 10 10 10 10 10 10 LEFT LEFT
15 15 15 15 15 15 15 15
0 0 0 0
MF MF MF MF
5 5 2.5K 5 5 2.5K 5 5 2.5K 5 5 2.5K RIGHT RIGHT
10 10 10 10 10 10 10 10
15 15 15 15 15 15 15 15
AUX RETURN
0 0 0 0 0 0 0 0 5
LF LF LF LF
5
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Safety Instructions/Consignes de sécurité/Sicherheitsvorkehrungen/Instrucciones de seguridad WARNING: To reduce the risk of fire or electric shock, do not expose this unit to ATTENTION: Pour éviter tout risque d’électrocution ou d’incendie, ne pas rain or moisture. To reduce the hazard of electrical shock, do not remove cover or exposer cet appareil à la pluie ou à l’humidité. Pour éviter tout risque d’électrocu- back. No user serviceable parts inside. Please refer all servicing to qualified per
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Table of Contents Introduction 2 MDR624 Features 3 Controls and Functions Front and Rear Panel Layout 4–5 Mono Input Channel Section 6–7 Master Section 8–9 MDR624 Input and Output Connections 10–11 Operating the MDR624 12–13 System Set-ups 14–15 MDR624 Wiring Guide 16 Specifications 17 Block Diagram 18 Notes 18-19 Copyright 2004, Samson Technologies Corp. Printed January, 2004 Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766
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Introduction Congratulations on your purchase of the Samson MDR624 mixer! The MDR624 is a six channel mixer, with two low noise microphone pre-amps. In addition to the two mono Mic/line inputs, there are two channels with left and right inputs to handle stereo signals. For added flexibility, you can change the tone quality of your microphones or other line inputs by using the three-band channel equalizers. Connecting external effects like a reverb or digital delay to the MDR624 is easy thanks to
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MDR624 Features MIC IN MIC IN AUX RET AUX SEND L LEFT/MONO CR OUTPUT R RIGHT PHONES LINE IN LINE IN L 3/L 5/L 30 30 GAIN GAIN LINE IN LINE IN MIX OUTPUT 4/R 6/R R 5 60 5 60 -26 +26 -26 +26 0 0 0 0 2T IN 2T OUT 5 5 HF 5 5 HF 5 5 HF 5 5 HF 12K 12K 12K 12K 10 10 10 10 10 10 10 10 LEFT LEFT 15 15 15 15 15 15 15 15 0 0 0 0 MF MF MF MF 5 5 5 5 5 5 5 5 RIGHT RIGHT 2.5K 2.5K 2.5K 2.5K 10 10 10 10 10 10 10 10 15 15 15 15 15 15 15 15 AUX RETURN 0 0 0 0 0 0 0 0 5 LF LF LF LF 5 5
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Controls and Functions Front and Rear Panel Layout 11 12 1 13 14 15 16 17 AUX RET AUX SEND 2 MIC IN MIC IN L LEFT/MONO CR OUTPUT 3 R RIGHT PHONES 18 LINE IN LINE IN 3/L 5/L L 30 30 GAIN GAIN LINE IN LINE IN MIX OUTPUT 19 4/R 6/R R 5 60 5 60 4 -26 +26 -26 +26 20 0 0 0 0 2T IN 2T OUT HF HF HF HF 5 5 5 5 5 5 5 5 12K 12K 12K 12K 5 21 10 10 10 10 10 10 10 10 LEFT LEFT 15 15 15 15 15 15 15 15 22 0 0 0 0 MF MF MF MF 5 5 5 5 5 5 5 5 RIGHT RIGHT 2.5K 2.5K 2.5K 2.5K 6 10 10 10 1
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Front and Rear Panel Layout Front and Rear Panel Layout FRONT PANEL 18 2 TRACK INPUTS – Connect the output from a DAT, 1 MIC – Input connector for Low-Noise Microphone pre- Cassette, Mini Disk or Hard Disk Recording system. amp. 19 2 TRACK OUTPUTS – Connect to the input of a DAT, 2 LINE –Input connector for Line level inputs. Cassette, Mini Disk or Hard Disk Recording system. 3 GAIN – Used to set the input level of the mic pre and line 20 AUX RETURN – Used to mix in level of the effects input
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Controls and Functions MONO INPUT CHANNEL SECTION The following section details each part of the MDR624’s input channels including the GAIN control, 3-BAND EQ, AUX send, PAN, BALANCE and LEVEL controls. The input channels One and Two on the MDR624 feature high quality, discrete transistor pre-amps providing transparency and extended dynamic range on standard XLR con- nectors. Channels 3/4 and 5/6 are stereo input channels that accept line level signals on standard 1/4" phone connectors for eith
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Controls and Functions MONO INPUT CHANNEL SECTION 4 BALANCE (Stereo Inputs Only) The MDR624’s BALANCE control is used to place or position a mono input into the stereo main Left and Right MIX bus. For a stereo input, 0 0 L BAL the balance control is used to center the sound between the Left and 4 Right Mix bus. You can create a stereo image by panning some input signals to the left and others to the right. L R PAN (Mono Inputs Only) 5 The MDR624’s PAN control is used to place or position the mon
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Controls and Functions MASTER SECTION The MDR624’s Master section includes the master level controls for the MAIN mix, AUX and CR (Control Room) / PHONES output, as well as, 2-track assign switches and LED metering for power and level. The following section details the function controls and switches in the Master section. 8 MAIN LEVEL The master MAIN control is the overall volume control for L the left and right mix bus. The MAIN LEVEL affects both CR OUTPUT the Control ROOM signal which is outp
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Controls and Functions MASTER SECTION - continued 12 POWER LED The Power LED lights up to indicate that the main POWER switch (located on the rear panel) is on. - Phantom Power LED 13 This LED illuminates indicating that the 48 volt phantom power is applied to the microphone 2T IN 2T OUT HF 12K pre-amps enabling use with condenser micro- 10 LEFT LEFT phones. The +48V LED will light up when the Phantom Power switch (located on the rear panel) is switched to the ON position. MF RIGHT RIGHT 2.5K 1
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MDR624 Input and Output Connections CHANNEL 1 – 6 MIC and LINE INPUTS The MDR624’s channels 1 and 2 mono input channels each have a 1/4-inch connector for line level inputs and XLR connectors for the MIC inputs. Channels 3/4 and 5/6 stereo input channels each have 1/4-inch connectors for line level inputs. By using the GAIN control on channels 1 + 2, you can connect a variety of signal sources from microphones to line level devices such as synthesizers, and drum machines. All the LINE and MIC
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MDR624 Input and Output Connections MASTER SECTION INPUT AND OUTPUT JACKS The MDR624 features several output connectors allowing you to interface a variety of external devices. A stereo recording device, such as a cassette recorder, can be connected to the 2 Track jacks, and power amplifiers or powered monitors can be connected to the CONTROL ROOM and MAIN output jacks. 19 AUX Send The signal present at the AUX output is sent from the AUX bus, which is fed from the AUX send on the input chann
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SIGNAL FLOW SIGNAL FLOW SIGNAL FLOW SIGNAL FLOW 1 2 R N O S M A S Operating the MDR624 BASIC OPERATION The following section explains the basic operation of the MDR624. CONNECTING MICROPHONES AND INSTRUMENTS 1. Before connecting mics or instruments, Bass Guitar Lead Guitar make sure that the power of all your sys- tems components, including the MDR624, Vocal Direct Box are turned off. Also, make sure that the Signal Processor Stereo Signal Left and Right MIX faders are turned all the way down.
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Operating the MDR624 SENDING AN INDEPENDENT MIX TO THE MONITOR SPEAKERS The MDR624’s AUX send can be used to feed a separate set of amplifiers and loudspeakers for stage monitors. This lets you build one stereo mix for the amplifiers and speakers facing the audience and the other mono mix for the amplifiers and monitor speakers facing the musicians. 1. Raise the AUX controls for the channels that you wish to hear from the monitor speakers. NOTE: The AUX controls are "PRE-FADER SENDS" which mean
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MDR624 System Set-Ups MDR624 LIVE SOUND SET-UP 14 This system shows the MDR624 connected to a pair of powered speakers like the SAMSON Expedition XP200. The MONITOR OUT is con- nected to an external power amp, which is dri- ving 2 monitor speakers. For inputs, one micro- phone is connected to channel 1’s low-imped- ance input, and the out- put of the Bass Direct Box is also connected to the Low-Impedance input on Channel 2. The Keyboards, as well as the Lead Guitar’s signal processor's output
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MDR624 System Set-Ups MDR624 RECORDING SET UP 15 This system shows the MDR624 in a recording set up with the LEFT and RIGHT CONTROL ROOM outputs hooked up to powered studio monitors and the AUX SEND feeding a head- phone mix sent to a Samson S•phone headphone amp. For inputs, a microphone is con- nected to channel 1’s low- impedance input, and the out- put of the Bass Direct Box is also connected to the Low- Impedance input on channel 2. The Keyboards, as well as the Lead Guitar’s signal pro
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MDR624 Wiring Guide CONNECTING THE MDR624 The are several ways to interface the MDR624 to support a variety of applications. The MDR624 features bal- anced inputs and outputs, so connecting balanced and unbalanced signals is possible. Unbalanced 1/4” Connector Balanced TRS 1/4” Connector XLR Balanced Wiring Guide 16
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MDR624 Specifications Mono input channels Microphone input electronically balanced, discrete input configuration Frequency response 10Hz to 45kHz, +0/- 3dB Distortion (THD&N) 0.05% at +4dBu, 1kHz Gain range 5dB to 60dB(MIC) SNR (Signal to Noise Ratio) 110dB Line input electronically balanced Frequency response 10Hz to 45kHz, +0/ -3dB Distortion (THD&N) 0.05% at +4dBu, 1kHz Sensitivity range -40dBu to -10dBu Stereo input channels Line input balanced Frequency response 10Hz to 55kHz,+0/-3dB Distor
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Block Diagram 18
