Related Manuals for Ashly DPX-200
Summary of Contents for Ashly DPX-200
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Page 1: Parametric Equalizer
DPX-200 Parametric Equalizer Compressor/Limiter 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 Internet: www.ashly.com... -
Page 2: Table Of Contents
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter INTRODUCTION ............3 UNPACKING . -
Page 3: Introduction
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter 1. INTRODUCTION The Ashly DPX-200 combines a four band para- metric equalizer and full function peak compressor/lim- iter in a single rack space product. Both equalizer and compressor/limiter can be used as stand-alone processors, or can be automatically chained together with a back panel switch. -
Page 4: Mechanical Installation
The line level input is used for normal signal processing, while the discrete mic input provides more gain for those applications where the DPX-200 is used as a comprehensive mic preamp. Press the input select switch in for line input, and out for mic input 5.2 Gain... -
Page 5: Parametric Filters
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter 5.5 Parametric Filters Two 20Hz-20KHz parametric filters allow cus- tom tailoring of EQ points, most useful for feedback con- trol, resonance compensation, or other types of frequency specific voicing. Each parametric filter consists of three main controls, frequency, bandwidth, and level. -
Page 6: Attack Time
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter be noted that an infinite ratio setting is likely to cause noticeable side effects in the sound, and may not be us- able on programs where subtle control is desired. 6.4 Attack Time... -
Page 7: Connections And Cables
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter The input meter takes its signal just after the gain con- trol, and will indicate input signal level regardless of out- put levels or limiter settings. The output meter display takes its signal from the actual output of the unit, so ev- ery control that affects the output will also have an effect on output meters. -
Page 8: Typical Applications
In most cases, the DPX-200 should be the last device before the power amp or crossover, or right before a recording device or trans- mitter. -
Page 9: Compressor/Limiter Applications
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter a channel that’s being used for something important and use it to tailor the sound of this channel exactly the way you want. Large Room Equalization Large rooms tend to suffer from multiple reflec- tions with long time delays, long reverberation times, and “ring-modes”, all of which lead to reduced intelligibility... -
Page 10: Special Effects
The Ashly DPX-200 can turn this procedure into a fast, painless job, eliminating loud feedback levels and the possibility of speaker or ear damage. -
Page 11: Design Theory
The solution is frequency-dependent limiting, which is easily accomplished with the DPX-200. By in- serting an equalizer into the Detector Patch point and boosting the equalizer at high frequencies in the vicinity of the sibilant, the limiter’s detector circuit becomes more... - Page 12 Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter unexpected, transient volume peaks in the music. This safety margin is known as headroom, and may range from 10 to 25 dB. Lowering our standard operating level to leave ourselves some headroom helps prevent distortion, but at...
- Page 13 Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter FET will only act as a pure resistor with very small sig- nals applied so it is necessary to attenuate an input signal before the gain control FET and then amplify it again.
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Page 14: Block Diagram
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter 10. BLOCK DIAGRAM DPX-200 Block Diagram INPUT EQ Master In/Out LINE GAIN 4 BAND INPUT PARAMETRIC EQ Line Individual EQ Band In/Out CHAIN LIMITER INPUT INPUT/OUTPUT METERS GAIN GAIN REDUCTION DISPLAY RATIO... -
Page 15: Warranty Information
Hum is often caused by a “ground loop” between components. Try using the suggested balanced input and output hookups if the other pieces of equipment used in conjunction with the DPX-200 have balanced inputs and outputs. Noise can also be caused by insufficient drive levels. Make sure you are sending a nominal 0 dBV line level signal to the unit. -
Page 16: Dimensions And Schematics
Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter SPECIFICATIONS (continued): Compressor/Limiter Gain: ....±15dB Ratio: ....2:1 Attack Time: . - Page 17 3.3K SW10B S W-DPDT F4 OUT Phone: Drawn By Size Sheet # James B Franks A->B @ 133% S:\Engineering\CLIENT98\5751\10s5751c-1.sch DPX-200 Parametric + COMPRESSOR/LIMITER APPROVED: $VKO \ $XGLR• ,QF• 847 Holt Road Webster, NY 14580-9103 (716) 872-0010 Fax: (716) 872-0739 14:26:01 Rev.
- Page 18 $VKO\ $XGLR ,QF R109 847 Holt Road Webster, NY 14580-9103 Phone: (716) 872-0010 Fax: Drawn By Size Print Date Sheet # James B Franks A->B @ 157% 10-Sep-2002 S:\Engineering\CLIENT98\5751\10s5751c-2.SCH DPX-200 Parametric + COMPRESSOR/LIMITER APPROVED: Dwg # 10S5751 (716) 872-0739 14:27:46 Rev.
- Page 19 (716) 872-0010 Fax: (716) 872-0739 THRES Drawn By Size Sheet # Print Date James B Franks A->B @ 157% 10-Sep-2002 S:\Engineering\CLIENT98\5751\10s5751c-3.SCH GAIN METER DPX-200 Parametric + COMPRESSOR/LIMITER INPUT METER OUTPUT METER APPROVED: Dwg # 10S5751 +6(Y) CLIP(R) +19 dBu 14:27:05 Rev.
- Page 20 Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (585) 872-0010 Fax: (585) 872-0739 Toll Free (800) 828-6308 Internet: www.ashly.com 2002 by Ashly Audio Corporation. All rights reserved worldwide. Printed in USA 0902...