Orban 674A Equalizer
Fabricant:
Image 1 de 1
Si vous avez d'autres photos ou manuels pour les
Orban 674A vous pouvez télécharger les fichiers ici .
Modèle:
674A
Date:
1985
Catégorie:
Groupe:
Description:
Stereo Equalizer
Information
The Orban 674A is a dual-channel eight-band quasi-parametric
Equalizer of high professional quality, and is the stereo
version of Orban's popular 672A Equalizer. Because
optimizing the controls for convenient stereo operation
required placing corresponding "A" and "B" controls
physically close to each other, there is slight crosstalk
between the channels at very high frequencies (typically
better than -55dB at 20kHz, falling at 6dB/octave at lower
frequencies). A small amount of leakage from one channel to
the other may be heard if you attempt to use each 674A
channel to equalize entirely independent program material,
and we recommend that the 674A be used only with
stereophonic program material. If you require absolute
isolation between the two channels, we recommend use of a
pair of 672A equalizers instead.
The 674A is equipped with graphic-type EQ controls providing
up to l6dB of reciprocal boost or cut. The center frequency
and bandwidth of each band are continuously variable to
enable precise control of the audio spectrum. Wide-range
high- and low-pass filters (12dB/octave) follow each EQ
section for added versatility. When these filters are
overlapped (200-2000Hz), the 674A can be used as a combined
graphic/parametric Equalizer and tunable electronic
crossover. Separate lowpass and highpass outputs are
provided for this purpose.
Each channel of the 674A has an electronically-balanced
bridging input, and unbalanced outputs (which can be
balanced by the addition of optional output transformers).
Input, outputs, and power line connections all contain
effective RF filtering. l2dB of gain is available. AH
potential overload points in the Equalizer are monitored by
an extremely fast "peak-stretching" overload detector, so
that peak clipping can be detected and corrected before it
becomes audible.
The flexibility offered by the 674A makes it a particularly
powerful tool in nearly all areas of audio: sound
reinforcement, public address, recording studio,
broadcasting, motion picture sound, dance bars (discos),
theater.....
The 674A easily meets the quality, performance, and
reliability requirements of the demanding professional, and
is also well-suited for use in semi-pro or audiophile
applications.
The controls and features of the 674A are fully described in
this manual. It will familiarize you with the unit's
potential and enable you to imaginatively use the 674A for
your specific installation and application.
Type manuel:
Service et Manuel de l'utilisateur
Pages:
54
Taille:
4.84 Mbytes (5072145 Bytes)
Langue:
english
Révision:
Manuel-ID:
Date:
1985 01 01
Qualité:
Document scanné, tous les lisible.
Date de transfert:
2017 10 25
MD5:
8060063eed603e47782d7b433f33c21c
Téléchargements:
650
Information
Specifications Registration Card Warranty
i Part A: Installation and Operation
I Introduction
1 Performance Highlights
2 Front Panel Description
3 Rear Panel Description 3 Block Diagram
3 AC Power k Mechanical Installation
XLR Connector Installation
5 Balanced Output Tranformer Installation
6 Electrical Installation
Input
Output
Wiring With Two-Conductor Shielded Cable Grounding Diagram
7 Typical Input/Output Connection Rules
7 Wiring With Single-Conductor Shielded Cable
8 OPERATING INSTRUCTIONS
Using the EQ Section
Boost/Cut Curve Familes
Using the Highpass and Lowpass Filters
Using the 674A As An Electronic Crossover
Headroom
11 Part B: Specific Applications
11 Stereo
! I Sound Reinforcement House Tuning Notch Filtering Full
Electronic Crossover
Partial Electronic Crossover and Individual Driver
Equalizer
Stage Monitors
13 Dance Bars
14 Recording Studios
15 Motion Picture Sound
15 Broadcasting
16 Electronic Music
17 Part C: Maintenance
17 Introduction
17 Performance Evaluation General Power Supply
Signal Processing Circuitry 23 Maintenance and Service
Preventive Maintenance Access
Replacement of Components on Printed Circuit Boards
Troubleshooting 1C Opamps Factory Service Shipping
Instructions 26 Circuit Description General Input Buffer
Equalizer Sections EQ IN/OUT Switch Lowpass Filter
Highpass Filter; Output Buffer Overload Indicator Power Supply
31 Appendix: Interconnections And Grounding
31 Driving the Input From High-lmpedance And/Or High-Level
Sources
31 Grounding