SoundCraft 1620LE User Manual
1
IMPORTANT
Please read this manual carefully before using
your mixer for the first time.
© Harman International Industries Ltd. 2004
All rights reserved
Parts of the design of this product may be protected by worldwide patents.
Part No. ZM0315-01
Soundcraft is a trading division of Harman International Industries Ltd. Information in this manual
is subject to change without notice and does not represent a commitment on the part of the vendor.
Soundcraft shall not be liable for any loss or damage whatsoever arising from the use of information
or any error contained in this manual.
No part of this manual may be reproduced, stored in a retrieval system, or transmitted, in any form
or by any means, electronic, electrical, mechanical, optical, chemical, including photocopying and
recording, for any purpose without the express written permission of Soundcraft.
Harman International Industries Limited
Cranborne House
Cranborne Road
POTTERS BAR
Hertfordshire
EN6 3JN
UK
Tel: +44 (0)1707 665000
Fax: +44 (0)1707 660742
http://www.soundcraft.com
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SAFETY SYMBOL GUIDE 4
IMPORTANT SAFETY INSTRUCTIONS 5
INTRODUCTION 7
DESCRIPTION 7
TYPICAL SPECIFICATIONS 8
WARRANTY 11
INSTALLATION 13
GENERAL PRECAUTIONS 13
MAINS INSTALLATION 13
INITIAL WIRING CONSIDERATIONS 14
AUDIO WIRING 14
SHIELDING 14
POINTS TO REMEMBER 15
WORKING SAFELY WITH SOUND 15
INSPECTION AND INSTALLATION 16
BLOCK DIAGRAM 22
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Contents Contents
Contents
Contents Contents
OPERATING CONTROLS 23
INPUTS 23
HEADPHONE 24
HOUSE, BOOTH AND TONE CONTROLS 24
OPTIONAL CONFIGURATIONS 25
MICROPHONE GAIN ADJUSTMENT 25
PHONO INPUT ON AUX 1, 2 AND/OR 3 26
MICROPHONE INPUT ON AUX 1, 2 AND/OR 3 27
AUX 4 INPUT : BYPASSING MASTER GAIN CONTROLS 28
TONE CONTROL BYPASS 29
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For your own safety and to avoid invalidation of the
warranty please read this section carefully.
SAFETY SYMBOL GUIDE
For your own safety and to avoid invalidation of the warranty all text marked with these symbols
should be read carefully.
WARNINGS
The lightning flash with arrowhead symbol, isThe lightning flash with arrowhead symbol, is
The lightning flash with arrowhead symbol, is
The lightning flash with arrowhead symbol, isThe lightning flash with arrowhead symbol, is
intended to alert the user to the presence ofintended to alert the user to the presence of
intended to alert the user to the presence of
intended to alert the user to the presence ofintended to alert the user to the presence of
un-insulated “dangerous voltage” within theun-insulated “dangerous voltage” within the
un-insulated “dangerous voltage” within the
un-insulated “dangerous voltage” within theun-insulated “dangerous voltage” within the
product’s enclosure that may be of sufficientproduct’s enclosure that may be of sufficient
product’s enclosure that may be of sufficient
product’s enclosure that may be of sufficientproduct’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shockmagnitude to constitute a risk of electric shock
magnitude to constitute a risk of electric shock
magnitude to constitute a risk of electric shockmagnitude to constitute a risk of electric shock
to persons.to persons.
to persons.
to persons.to persons.
CAUTIONS
The exclamation point within an equilateralThe exclamation point within an equilateral
The exclamation point within an equilateral
The exclamation point within an equilateralThe exclamation point within an equilateral
triangle is intended to alert the user to thetriangle is intended to alert the user to the
triangle is intended to alert the user to the
triangle is intended to alert the user to thetriangle is intended to alert the user to the
presence of important operating andpresence of important operating and
presence of important operating and
presence of important operating andpresence of important operating and
maintenance (servicing) instructions in themaintenance (servicing) instructions in the
maintenance (servicing) instructions in the
maintenance (servicing) instructions in themaintenance (servicing) instructions in the
literature accompanying the appliance.literature accompanying the appliance.
literature accompanying the appliance.
literature accompanying the appliance.literature accompanying the appliance.
NOTES
Contain important information and useful tipsContain important information and useful tips
Contain important information and useful tips
Contain important information and useful tipsContain important information and useful tips
on the operation of your equipment.on the operation of your equipment.
on the operation of your equipment.
on the operation of your equipment.on the operation of your equipment.
HEADPHONES SAFETY WARNING
Contain important information and useful tipsContain important information and useful tips
Contain important information and useful tips
Contain important information and useful tipsContain important information and useful tips
on headphone outputs and monitoring levels.on headphone outputs and monitoring levels.
on headphone outputs and monitoring levels.
on headphone outputs and monitoring levels.on headphone outputs and monitoring levels.
Recommended Headphone Impedance >= 200 Ohms.Recommended Headphone Impedance >= 200 Ohms.
Recommended Headphone Impedance >= 200 Ohms.
Recommended Headphone Impedance >= 200 Ohms.Recommended Headphone Impedance >= 200 Ohms.
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IMPORTANT SAFETY INSTRUCTIONS
Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any ventilation openings. Ventilation should not be impeded by covering the ventilation openings with
items such as newspapers, table cloths, curtains etc. Install in accordance with the manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
Do not defeat the safety purpose of a polarised or grounding type plug. A polarised plug has two blades with one
wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the
third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet
Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles and the
point where they exit from the apparatus.
Only use attachments/accessories specified by the manufacturer.
Use only with the cart, stand, tripod, bracket or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
Unplug this apparatus during lightning storms or when unused for long periods of time.
Refer all servicing to qualified service personnel. It is recommended that all maintenance and service on the
product should be carried out by Soundcraft or its authorised agents. Soundcraft cannot accept any liability
whatsoever for any loss or damage caused by service, maintenance or repair by unauthorised personnel. Servicing
is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged,
liquid has been spilled or objects fallen into the apparatus, the apparatus has been exposed to rain or moisture,
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does not operate normally, or has been dropped.
No naked flame sources, such as lighted candles, should be placed on the apparatus.
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. Do not expose
the apparatus to dripping or splashing and do not place objects filled with liquids, such as vases, on the apparatus.
THIS APPARATUS MUST BE EARTHED. Under no circumstances should the safety earth be disconnected from the
mains lead.
The mains supply disconnect device is the mains plug. It must remain accessible so as to be readily operable when the
apparatus is in use.
If any part of the mains cord set is damaged, the complete cord set should be replaced. The following information is
for reference only.
The wires in the mains lead are coloured in accordance with the following code:
Earth (Ground): Green and Yellow (US - Green/Yellow)
Neutral: Blue (US - White)
Live (Hot): Brown (US - Black)
As the colours of the wires in the mains lead may not correspond with the coloured markings identifying the terminals
in your plug, proceed as follows:
The wire which is coloured Green and Yellow must be connected to the terminal in the plug which is
marked with the letter E or by the earth symbol.
The wire which is coloured Blue must be connected to the terminal in the plug which is marked with the
letter N
The wire which is coloured Brown must be connected to the terminal in the plug which is marked with the
letter L
Ensure that these colour codes are followed carefully in the event of the plug being changed
This unit is capable of operating over a range of mains voltages as marked on the rear panel. It is important to ensure
that the correct mains fuse is fitted before switching on the unit.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when
the equipmentis operated in a commercial environment. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
This Class A digital apparatus meets the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du
Canada.
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INTRINTR
INTR
INTRINTR
Becoming the owner of a new Urei by Soundcraft 1620LE means you own a piece of DJ history – using the most upto date
engineering technology Soundcraft deliver the Classic 1620 with the most awesome audio characteristics for today’s demanding DJ.
UREI is a classic pro audio name and has been a member of the Harman group since the early 80’s. The UREI 1620 DJ mixer, originally
produced in the 1970’s, reached cult status and played a major part in shaping today’s international club scene. Famed for its unique
sound it was regularly selected as the ‘mixer of choice’ by most of the top clubs and installers including the renowned Richard Long.
Richard Long was famous for designing and installing large nightclub systems in the 70’s including Paradise Garage, Xenon, Regines,
Hippopotamus, 12 West and Studio 54.
Until today opportunities to buy the UREI 1620 have been rare and when second-hand units do become available they change hands
for a premium as DJ aficionados seek to obtain their own piece of history and bathe in the mystique that the unique ‘1620 sound’ is
famous for. Such is the popularity of the UREI 1620 it’s become the influence for countless products from many manufacturers around
the world - it’s been copied but never truly reproduced – until now.
Soundcraft, the world-leading mixer specialist and part of the Harman Pro Group, has re-launched the UREI series led by the UREI
1620LE, a limited edition version of the classic 1620.
The new unit retains its legendary performance and has been brought bang up to date with modern manufacturing techniques,
components and materials.
Soundcraft has caringly followed the ethos of the original electronic design and used its 30 years design and engineering expertise
to deliver an even better sounding mixer that has to be heard to be believed. Trials at high-end nightclubs with some of the most
renowned masters of club sound have demonstrated that not only the extraordinary sound quality of the original 1620 has been retained
– it’s been improved.
ODUCTIONODUCTION
ODUCTION
ODUCTIONODUCTION
Now you can enjoy your own piece of DJ history, and help create the future.
DESCRIPTION
The UREI Model 1620LE Music Mixer is a multi-input stereo mixer which has been optimized for the heavy demands of fixed and mobile
sound installations. The outstanding features and reliability of the Model 1620LE make it useful where high quality is essential.
The Model 1620LE has six input positions, each with a level control and a balance control. In addition, the input positions labeled AUX
1 – AUX 4 have input source selector switches, allowing any of these four positions to control any of five auxiliary inputs (AUX A – E) or
the output of an optional internal preamplifier associated with that input position only. AUX 4 input is supplied with a microphone
preamplifier card, Part No. 1620-MC, and the selector switch position is labeled MIC. If no preamplifier card is installed in input positions
AUX 1, AUX 2 or AUX 3, the preamplifier input may be used with a line level source.
The output circuits of the Model 1620LE are quite versatile. Separate outputs for house and booth amplifiers are provided, each with
its own level control; the house output is transformer-isolated, so that remote amplifiers may be fed with minimum likelihood of grounding
problems or noise pickup in the interconnecting lines.
A separate headphone circuit has its own selector switch, allowing its source to come from any of the six input controls (pre-fader) or
from the program output; its level control feeds an internal headphone amplifier and front panel stereo 6.3mm (1/4 in) phone jack. For
convenience in attaching lighting controllers, an isolated mono (L + R) output is provided on a rear panel jack; this output is not affected
by any of the output level controls, so that lighting intensity will not be changed by overall level adjustments. Separate bass and treble
controls for left and right channels affect the house, booth, headphone and mono outputs. The inflection points of these controls have
been carefully selected for minimum midrange coloration and good adjustment range.
Additionally, two separate tape outputs are provided for making recordings, and an effects loop allows connection of equalizers, limiters,
expanders or other signal processing equipment.
To further customize the 1620LE Mixer for specific installations, you may select internal options to bypass the tone controls and/or
connect the standard mic input so that is does not appear on the tape outputs or effects loop and is not affected by the master gain or
tone controls.
The Model 1620LE has been designed for long life and reliability. All input and output level controls are quiet and smooth-acting.
Modular construction assures minimum down time for service – all preamplifiers, selector switches, level and balance controls are on
modular subassemblies which may be replaced in the field without soldering. Components have been selected to be over-rated to
assure reliability in continuous duty service. Additionally gold-plated connectors are used throughout. For audio signal accuracy and
good channel matching, tight-tolerance electronic and electro-mechanical parts have been specified.
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TYPICAL SPECIFICATIONS
INPUTS Six stereo inputs with individual balance and level Controls.
Phono 1 & 2 RIAA-equalized stereo phono, with two Part No. 1620-PC preamplifier cards supplied as
standard configuration.
Auxiliary 1-4 Switchable to any one of five line level sources or aPreamplified low level source.
Standard configuration: Aux 4 Input equipped with mono microphone preamplifier card, Part No. 1620-MC.
Optional configuration: Preamp source position accepts stereo phono preamplifier card, Part No. 1620-PC, or
mono microphone preamplifier card, Part No. 1620-MC; Phono inputs 1 & 2 alternately will accept mic preamp
card in place of standard phono preamp card.
Phono Inputs
Input Impedance 47k Ohms.
Gain 64 dB maximum @ 1 kHz (measured at House XLR).
Connector RCA-type phono jack.
Microphone Input
Input Impedance For 150 ohm microphone, electronically balanced.
Gain 60-84 dB, adjustable on card (measured at House XLR).
EIN < -126 dBu (22-22kHz).
Connector XLR-type three-pin female.
Auxiliary Inputs
Input Impedance 10k ohm nominal.
Gain 20 dB maximum
Connector RCA – type phono jack.
OUTPUTS
House Output:
i) Balanced Transformer isolated, symmetrical, floating balanced
Output Impedance < 50 Ohms.
Recommended Load >= 600 Ohms.
Frequency Response + 0/-1 dB, 20 Hz – 20 kHz.
THD +N < 0.1% 30 Hz – 20 kHz @ +20 dBu, 10k Ohms.
Maximum Output +25 dBu into 600 Ohms.
Connectors XLR-type three pin male.
ii) Unbalanced Single-ended, electronic
Output Impedance 75 Ohms.
Recommended Load >= 600 Ohms.
Frequency Response + 0/-1 dB, 20 Hz – 20 kHz.
THD +N < 0.05% 20 Hz – 20 kHz @ +20 dBu, 10k Ohms.
Maximum Output +20 dBu into 600 Ohms.
Connectors RCA-type phono jack.
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Booth Output: same signal as House Output, separate front panel level control.
i) Balanced Single-ended, impedance balanced, electronic
Output Impedance 75 Ohms.
Recommended Load >= 10k Ohms.
Frequency Response + 0/-1 dB, 20 Hz – 20 kHz.
THD +N < 0.05% 20 Hz – 20 kHz @ +20 dBu, 10k Ohms.
Maximum Output +22 dBu into 10k Ohms.
Connectors XLR-type three pin male.
ii) Unbalanced Single ended, electronic
Output Impedance 75 Ohms.
Recommended Load >= 10k Ohms.
Frequency Response + 0/-1 dB, 20 Hz – 20 kHz.
THD +N < 0.05% 20 Hz – 20 kHz @ +20 dBu, 10k Ohms.
Maximum Output +22 dBu into 10k Ohms.
Connectors RCA-type phono jack.
Headphone Output:Switchable to any input control (pre-fader) or to Program output.
Output Impedance < 50 Ohms.
Recommended Load >= 200 Ohms.
Frequency Response ±1.5 dB, 20 Hz – 20 kHz.
THD +N < 0.3%, 20 Hz – 20 kHz, +20dBu(into 200 ohm load).
Maximum Output +20 dBu into 200 Ohms.
Connector 6.3mm (1/4 in) stereo jack on front panel.
Mono Output: Summed left and right program signals, not affected by master gain, intended for
lighting controllers or zone control.
Output Impedance 5k Ohms.
Recommended Load >= 5k Ohms.
Frequency Response +0/-1 dB, 20 Hz – 20 kHz.
Maximum Output +14 dBu into 5k Ohms.
Connector 6.3mm (1/4 in.) stereo jack
(tip = signal, ring & sleeve=ground).
Tape Outputs x 2
Output Impedance 75 Ohms.
Recommended Load >= 10k Ohms.
Frequency Response +0/-1 dB, 20 Hz – 20 khz.
THD +N <0.05%, 20 Hz – 20 kHz, +20dBu, 10k Ohms.
Maximum Output +22 dBu into 10k Ohms.
Connector RCA – type phono jack.
Effects Loop Ouptut: Same specifications as Tape Outputs.
Effects Loop Input
Input Impedance 10k Ohms.
Maximum Input Level + 22 dBu.
Connector RCA – type phono jack.
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TONE CONTROLS: Affect program material from House, Booth, Headphone and Mono outputs; Separate controls for
left and right channels.
Treble ± 12 dB @ 10 kHz.
Bass ± 10 dB @ 50 Hz.
POWER REQUIREMENTS 100-125/200-250 V AC, 50/60 Hz, Selectable on rear panel.
Consumption 20 W maximum.
Indicator LED, front panel via cue switch.
Fuse Type 20mm, Slow Blow, T1AL, 250 V
(for either 120 or 240V setting).
Power Connector IEC with cable retainer
ENVIRONMENT
Operating: 0 C to + 50 C (+32F to +122 F).
Storage: -20C to +60C (-4F to +140F).
PHYSICAL SPECIFICATIONS
Dimensions
Front Panel 133 x 483mm (5-1/4in x 19 in.) EIA Rack mount.
Depth Behind Panel 203 mm (8 in.)
Finish
Panel is 3.2mm (1/8 in.) black anodized, Chassis is anodized
aluminium.
Weights
Net Weight 6.0 kg (13.3 lb).
ACCESSORIES
Part No. 1620-MC Microphone Preamplifier.
Part No. 1620-PC Phono Preamplifier.
(Note: 1 each 1620-MC and 2 each 1620-PC are supplied in the 1620LE Mixer; up to 3 additional preamplifiers
may be installed).
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