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DLM-821
Stereo
Ducking Line/Microphone
Mixer
Operating Manual
ASHLY AUDIO INC.
847 Holt Road Webster, NY 14580-9103 Phone: (585) 872-0010
Toll-Free: (800) 828-6308 Fax: (585) 872-0739
www.ashly.com
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer Table Of Contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 AC POWER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 SECURITY COVERS . . . . . . . . . . . . . .
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 1. INTRODUCTION 2. UNPACKING Congratulations on your purchase of an Ashly As a part of our system of quality control, every DLM-821 stereo ducking line level mixer. Features include Ashly product is carefully inspected before leaving the eight balanced stereo inputs for line level sources, the first factory to ensure flawless appearance. After unpacking, four inputs with switchable 30dB gain for low impedance please inspect for an
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 5. CONTROLS 5.5 Output Meters 5.1 Ducking Enable A pair of peak detecting 6-segment LED meters are used to indicate output level. Green LED's are used Pressing this switch enables a signal present on below 0 VU, yellow above 0 VU, and red LED's indicate inputs 1 or 2 to duck (attenuate) the signals on inputs 3 clipping. This meter pair monitors the main stereo out- through 8. See sections 5.14 through 5
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 5.9 Power Switch Internal PCB Jumper Options: The DLM-821 power switch is on the back panel. 5.13 Ch. 2 Detect Enable * When it is pressed in the front panel power LED will be- come lit. Internal jumper J1 allows enabling or disabling the ducker detector for ch. 2. (factory default is enabled) 5.10 Mono Output Mic/Line Switch 5.14 Ducking Level * This switch selects between a 0dBu (out posi- tion) line
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer Ashly Audio Inc. Fig. 5.2 - DLM-821 Internal Jumper Locations 6. CONNECTIONS AND CABLES G 6.1 Inputs - + The DLM-821 stereo inputs use two 20k ohm balanced (10k ohm unbalanced) Euroblock connectors per channel. Wire the (+) signal to the (+) terminal, the (-) signal G - + to the (-) terminal, and the shield to G. If an unbalanced (two conductor) input signal is Unbalanced used, connect the shield to both (-) a
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 7. TYPICAL APPLICATIONS 7.1 Small Sound Reinforcement System In the setup shown here, the DLM-821 is used to mix typical sound sources that might be found in a small club, school theater or similar environment. INPUT channels 1 & 2 are used for microphones for live vocal or instru- mental pickup. INPUT channels 3-8 are used for the output of electronic music devices such as keyboards, MIDI sound modules, drum machines, etc. The p
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 7.3 Restaurant/Sports Bar System: In this application, a variety of line level audio signals (tape, CD, satellite background music and TV) are fed into line inputs five through eight. Talent mics are fed into inputs three and four. A host paging mic is fed into input 2 which will duck (attenuate) three through eight. An emergency paging mic is fed into input one and channel one priority is internally selected. An emergency page
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 633 9. DIMENSIONS 233 4 5337 76426 !"# $ % & '+ 10. SPECIFICATIONS CROSSTALK adjacent inputs or input to output at 1KHz . . . . <-80dB DISTORTION adjacent inputs or input to output at 20KHz . . <-60dB THD at +20 dBu, 20Hz-20KHz . . . . . . . . . . . . . <0.05% VU METERS HUM & NOISE (20Hz-20KHz) Two 5-segment LED meters. . . . . . . . . .
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 11. WARRANTY INFORMATION Thank you for your expression of confidence in Ashly products. The unit you have just purchased is pro- tected by a five-year warranty. To establish the warranty, be sure to fill out and mail the warranty card attached to your product. Fill out the information below for your records. Model Number _________________________________ Serial Number __________________________________ Dealer _____________________
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 11 12. DLM-821 SCHEMATIC DIAGRAMS 1 2 3 4 5 6 7 8 Channels 1-2 10S8210-2.sch RPeakBus Right Output Mute LPeakBus (Shown Out) RBus 7 LBus R17 Right Output 8 +18 SW2C E 9 E 100 Channels 3-6 C35 10S8210-3.sch .1U RPeakBus C11 LPeakBus C36 10pf RBus C29 27p .1U LBus R9 VR1A C13 RSum C6 RMeter -18 R10 68k 10pf R32 C100K R12 CH 7 & 8 + Power Supply 1.5U -18 C15 R30 10S8210-4.sch none 22k 4.7k R52 R40 68k -18 100k RMeter
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 12 1 2 3 4 5 6 7 8 C1 D103 D203 Phantom Pwr +18 Mic/Line +18 Mic/Line +18 Phantom Pwr +18SW1 RPeak RPeak Channel 1 Channel 2 12 12 In-Mic In-Mic 1N4148 1N4148 R78 SW103A 3 6 11 None C107 11 C2 J7 C207 +18SW1 Right/Mono/Mic R108 Right/Mono/Mic R208 2 5 10 10 .1U 33K .1U SW102D R119 SW202D 4 1 1.15k 1.15k C104 27p C204 27p SW DPDT R202 None C7 390K C108 C208 R101 R102 R201 3.3K CH2 Detect Enable
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 13 1 2 3 4 5 6 7 8 Phantom Pwr Mic/Line Mic/Line +18 12 In-Mic +18 12 In-Mic +18SW2 Channel 3 Channel 4 11 11 +18 Phantom Pwr R308 R408 SW303A 3 6 10 C307 10 SW302D SW402D Right/Mono/Mic Right/Mono/Mic 5 2 C407 1.15k .1U 1.15k +18SW2 C304 27p C404 27p 4 1 .1U SW DPDT C308 R307 R407 R301 R401 C408 .1U E 3.3K R302 3.3K R402 E 39.2K 39.2K .1U 3.3K -18 3.3K -18 R303 R403 C301 D303 C401 -18 1.15K 1.15K D403 2 2 -18 RPea
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 14 1 2 3 4 5 6 7 8 E E C704 27p C804 27p Four-Ganged Pot Channel 7 Channel 8 R707 R807 D 10.0k 10.0k C -18 -18 R703 Right R803 B Right 10.0k 10.0k D703 D803 2 2 A 1 1 U701A RPeak U801A RPeak 3 3 1N4148 1N4148 4560 4560 CW R704 R804 C803 10.0k 10.0k R706 +18 R806 27p +18 C703 J701 27p 10.0k C709 Channel 7 Mute 10.0k C809 Channel 8 Mute 6 J801 47U 47U In = Channel On In = Channel On 5 6 SW701B SW801B 4 6 5 6 In In 3
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer 15 1 2 3 4 5 6 7 8 Clip Clip +18 +18 +18 +18 R R D909 D959 R901 R951 R903 R902 R953 R952 Left Meter Card Right Meter Card 10k 300k 10k 300k 4.7K 1N4148 4.7K 1N4148 D906 D956 E R904 R954 E From 10P3801 Motherboard From 10P3801 Motherboard 12k 12k +18 -18 +18 -18 J901 J951 1 1 2 5 2 5 3 7 3 7 U902B U952B R905 R955 4 6 4 6 5 4560 5 4560 3.3K 3.3K R906 R956 C901 C951 10M 10m D905 D955 .01U .01U H9 Y +6VU Y +6VU BRACKET
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Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (585) 872-0010 Fax: (585) 872-0739 Toll Free (800) 828-6308 www.ashly.com © 2004 by Ashly Audio Corporation. All rights reserved worldwide. Printed in USA 3-04 DLM-00
