DRAWMER MX50 DUAL DE-ESSER OPERATORS MANUAL CONTENTS SAFETY CONSIDERATIONS page 1 INTRODUCTION page 2 INSTALLATION • Audio Connections • Power Connection page 3 page 3 page 5 CONTROL DESCRIPTIONS and OPERATION • Linking page 6 page 7 IF A FAULT DEVELOPS page 8 CONTACTING DRAWMER page 8 TECHNICAL SPECIFICATION page 9 BLOCK DIAGRAM page 10 SESSION RECALL page 11 i
COPYRIGHT This manual is copyrighted © 2011 by Drawmer Electronics, Ltd. With all rights reserved. Under copyright laws, this manual may not be duplicated in whole or in part without the written consent of Drawmer. ONE YEAR LIMITED WARRANTY Drawmer Electronics Ltd., warrants the Drawmer MX50 audio processor to conform substantially to the specifications of this manual for a period of one year from the original date of purchase when used in accordance with the specifications detailed in this manual.
MX50 OPERATORS’ MANUAL 1 DRAWMER MX50 Dual De-Esser SAFETY CONSIDERATIONS CAUTION - MAINS FUSE TO REDUCE THE RISK OF FIRE REPLACE THE MAINS FUSE ONLY WITH THE SAME TYPE, WHICH MUST BE A CLASS 3, 230 VOLT, TIME DELAY TYPE, RATED AT 63mA WHERE THE MAINS INPUT VOLTAGE SWITCH IS SET TO 230 VOLTS AC. AND 125mA WHERE THE MAINS INPUT VOLTAGE IS 115 VOLTS AC. ALL FUSES MUST COMPLY WITH IEC 127-2. THE FUSE BODY SIZE IS 20mm x 5mm.
2 MX50 OPERATORS’ MANUAL INTRODUCTION The MX50 is a flexible, simple to set up dual De-Esser designed to fulfil the needs of professional studio, theatre and live sound applications. It may be used in balanced systems at +4dBu operating levels using the XLR connectors, or unbalanced at -10dBu using the TRS stereo jacks.
MX50 OPERATORS’ MANUAL 3 INSTALLATION The MX50 is designed for standard 19" rack mounting and occupies 1U of rack space. Avoid mounting the unit directly above power amplifiers or power supplies that radiate significant amounts of heat. Always connect the mains earth to the unit. Use fibre or plastic washers to prevent the front panel becoming marked by the mounting bolts. AUDIO CONNECTIONS Input and Output connections are provided for use at +4dBu via balanced XLRs or at -10dBu via unbalanced jacks.
4 MX50 OPERATORS’ MANUAL AUDIO CONNECTION DIAGRAM
MX50 OPERATORS’ MANUAL 5 POWER CONNECTION If, for some reason, the unit is to be operated at a mains input voltage which is different to that as supplied, the following procedure must be carried out by a qualified technical engineer. 1: Disconnect the unit from the mains. 2: Using a number 1 size pozidrive screwdriver, remove the seven self-tapping screws that retain the top cover. Removing seven screws to access internal fuse 3. Set the voltage rating and replace the fuse. 4. Replace the cover.
6 MX50 OPERATORS’ MANUAL CONTROL DESCRIPTION AND OPERATION Both channels of the MX50 are identical and may be used completely independently or linked for stereo operation. In the linked mode, the left and right channel control settings are averaged, though the channel bypass switches remain independent. In linked mode, both de-essers of the two channels track together to avoid the inevitable image shifting that would occur if the stereo signal were treated independently.
MX50 OPERATORS’ MANUAL 7 De-Ess Band Full Reduces the total signal level in response to signals in the selected frequency band. This mode of operation produces less phase shifting of broadband material and single vocals but is more noticeable then Split band processing. Applying excessive gain reduction in this mode can lead to the vocal sound taking on a lisping quality.
8 MX50 OPERATORS’ MANUAL IF A FAULT DEVELOPS For warranty service please call Drawmer Electronics Ltd. Or their nearest authorised service facility, giving full details of the difficulty. On receipt of this information, service or shipping instructions will be forwarded to you. No equipment should be returned under the warranty without prior consent from Drawmer or their authorised representative. For service claims under the warranty agreement a service Returns Authorisation (RA) number will be given.
MX50 OPERATORS’ MANUAL 9 TECHNICAL SPECIFICATIONS (Measurements taken using +4dBu balanced XLR input where applicable) INPUT IMPEDANCE 20KS (bal), 20KS (unbal) MAXIMUM INPUT LEVEL +21dBu INPUT CMR >!40dB OUTPUT BALANCE >!46dB OUTPUT IMPEDANCE 50 S (bal), 100 S (unbal) MAXIMUM OUTPUT LEVEL +21dBu BANDWIDTH 12Hz to 51KHz -1dB CROSSTALK @ 35KHz !88dB @ 1KHz Below Noise Level NOISE Wideband 22Hz - 22KHz ref +4dBu (worst case) AV !89dB !95dB DISTORTION Typical Input 100Hz 1KHz 10
10 MX50 OPERATORS’ MANUAL BLOCK DIAGRAM
MX50 OPERATORS’ MANUAL 11
