Speck EQF 810 Manuel utilisateur
speck electronics
EQF 810
Audio Equalizer
Reference Manual
Speck Electronics products are warranted to the original owner to be free of
defects in material or workmanship.
This warranty does not apply to any product subject to accident, misuse,
neglect, or failure to comply with normal maintenance procedures, or if the
serial number has been defaced, altered, or removed; nor will Speck
Electronics accept responsibility for damages resulting from improper
installation, alteration or unauthorized parts or repairs. If the product is
modified by the customer without permission, the customer agrees to pay for
parts and labor necessary to remove the modification before repair. The cause
of the defect is in the sole judgment of Speck Electronics.
Should a defect develop within one year of purchase from Speck Electronics
or an authorized dealer, Speck Electronics will supply the part or parts
necessary at no charge. Labor is covered in this warranty for a period of one
year. Outside service, repairs, or pickups are not covered under this warranty.
Any item returned for warranty repair should be sent, if possible, in the
original packing container, prepaid to Speck Electronics, 341 E. Alvarado
Street, Fallbrook, California, 92028. If, in our opinion, the packing container
is improper for return shipping, we reserve the right to supply a new container
at a minimal charge.
In the interest of improving Speck products, designs and specifications are
subject to change without notice. It should be mentioned that if a change is
necessary for any reason, we make every effort to document
that change and send an "update notice" to all customers at no charge.
Speck Electronics makes no warranty of any kind with regard to this material,
including, but not limited to, the implied warranties of merchantability and
fitness for a particular purpose. Speck Electronics shall not be liable for
errors contained herein or for incidental consequential damages in connection
with the furnishing, performance, or use of this material.
This document contains proprietary information which is protected by
copyright. All rights are reserved. No part of this document may be
photocopied, reproduced, or translated into another language without the prior
written consent of Speck Electronics.
The information contained in this document is subject to change without
notice.
All trademarks are the property of their respective owners.
Speck Electronic
341 East Alvarado Street
Fallbrook, California 92028
USA
1+760-723-4281
www.speck.com
Warranty
Notice
ii
General .....................................................................
Standard accessories ....................................................
Operator safety summary ...................................................
Power source .............................................................
Removing the cover ....................................................
Specifications ..................................................................
General .....................................................................
Unpacking and inspection ............................................
Environmental considerations .......................................
Grounding the product ..........................................................
Mechanical installation ................................................
Physical placement of adjacent equipment ......................
Cleaning .........................................................................
Repacking for shipment .....................................................
General .....................................................................
Basic Theory of Equalizers ...............................................
Low-pass filter.............................................................
High-pass filter ............................................................
Bandpass filter.............................................................
Default control setting........................................................
Front Panel Controls .......................................................
Output select ...............................................................
Variable filters.............................................................
L - Low band controls ..................................................
L/M - Low/Mid band controls........................................
M - Mid band controls..................................................
H - High band controls .................................................
Rear Panel .....................................................................
Input connectors ..........................................................
Output Cconnectors .....................................................
A.C. power inlet ..........................................................
Fuse ..........................................................................
Power switch ..............................................................
Main voltage selector switch .........................................
General .................................................................................
Audio cable ..........................................................................
Connectors ...........................................................................
AC Distribution and safety ......................................................
Proper AC grounding ...........................................................
Quality AC system ...............................................................
AC distribution .....................................................................
Clock noise and AC .............................................................
Safety earth connection ........................................................
Audio earth ...........................................................................
Proper Audio Grounding and Shielding .................................
EMI and RFI .............................................................................
Sources of EMI ....................................................................
Reducing EMI ......................................................................
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Contents
iii
Chapter 1 Introduction
Chapter 2 Installation
Chapter 3 Operation
Chapter 4 Wiring
and Other
Introduction
General
Thank you for purchasing our EQF 810 Equalizer. The EQF 810 has
operational features that are easy to understand and you should be up
and running in no time. If you have any questions regarding the
EQF 810 or any Speck product, do not hesitate to contact Speck
Electronics.
Speck Electronics
341 E. Alvarado Street
Fallbrook, CA 92028
Phone +760-723-4281
email [email protected]
The EQF 810 is a four band parametric equalizer and two variable
filters housed in a 1/2 rack space chassis that covers the audio spectrum
from a low 20Hz all the way up to 25kHz. It is well suited in audio
applications for professional recording, sound contracting, touring, or
any application where equalization is required.
Connect the EQF 810 to virtually any line level source: balanced,
unbalanced, or mixer inserts. The EQF 810 has high headroom that will
handle balanced signals up to +28dBu.
The EQF 810 design uses I.C. operational amplifiers for the active
electronics. All equalizer bands use state variable filter topologies and
the variable filters use a 2nd order Butterworth design. The line inputs
are active-balanced and the outputs are switchable between active-
balanced or Jensen Transformer-balanced.
The EQF 810 is available in 2 versions;
• The Model EQF 810-NA designed to operate with 100 and 120
VAC mains power.
• The Model EQF 810-EU that is designed to operate with 220, 230
or 240 VAC mains power.
Chapter 1 Introduction Section 1
The EQF 810 is supplied with the following list of accessories:
• Operations Manual
• Power cord (North American version only)
• (4) rubber bumpers - used for table top mounting or stacking
multiple units.
• (3) 6-32 x ½” machine screws - supplied to mount the EQF 810
to an optional rack shelf.
The EQF 810 is intended to operate from an AC power source that
does not apply more than 120 Volts RMS (Model EQF 810-NA) or
240 Volts RMS (Model EQF 810-EU) between the supply conductors.
Always make certain that the power cord matches the operating
voltage shown on the rear panel.
To avoid personal injury, do not remove the top cover of the EQF 810
and never operate without the cover panel properly installed. If it
becomes necessary to remove the cover panel for service or to change
the mains operating voltage, always disconnect the power cable
before proceeding.
The EQF 810, with its internal power supply, contains voltages that
can cause serious injury or death. Refer all repairs to a qualified
service technician, or directly to Speck Electronics.
Operator Safety
Summary
Do not remove
covers or panels
Standard accessories
Power source
Chapter 1 Introduction Section 2
Frequency Response
Input Level
Normal
+4 dBu
Maximum
+28dbu
Output Distortion(THD+n)
22Hz to 22KHz @ +4dBu
.0016%
Test Conditions:
AP balanced +4dBu signal connected to input.
All Boost/Cut controls set to “0”
LP and HP filters enable switches set “out”
4 Band EQ enable switch set “in”
AP analyzer connected at output
Residual Noise Measurement
Test Conditions:
AP balanced signal connected to input.
AP Generator set “Off”
All Boost/Cut controls set to “0”
AP analyzer connected at output
Power requirements 9 Watts
Dimensions HxWxD = 8.6" x 1.75" x 11"
(218mm x 44mm x 280mm)
Shipping weight Approximately 7 lbs (3.2Kg)
ALL MEASUREMENTS WERE PERFORMED WITH AN AUDIO PRECISION TEST SET .
Output Level:
(Active Balanced)
(Transformer Balanced)
Normal
+4 dBu
+4 dBu
Maximum
+28dbu
+24dBu
Input Impedance 30K Ohms
Output Impedance
(Active Balanced)
(Transformer Balanced)
60 Ohms
600 Ohms
Measured at active balanced output
Measured at transformer output
5Hz(-0.25dB) to 68kHz(-0.5dB)
2Hz(-.25dB) to 149kHz(-3dB)
10Hz(-0.25dB) to 68kHz(-0.5dB)
10Hz(-.25dB) to 148kHz(-3dB)
Residual Noise Measurement
(10Hz-80kHz)
-89 dBu
Specifications
(Active Balanced)
(Transformer Balanced) .0025%
Shelf switches set “out”
LP filter, HP filters, and Equalizer enable switches set “in”
Shelf switches set “out”
Transformer - Active output switch set “out”
Chapter 1 Introduction Section 3
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Chapter 1 Introduction Section 4
Installation
The following information should give you the basics on how to install
the EQF 810. The proper installation of the EQF 810 as part of a larger
system requires a clear understanding of audio wiring, AC distribution,
grounding, and shielding techniques.
When the EQF 810 is being installed into a larger system, it may be
necessary to retain the services of someone experienced in these
matters.
The EQF 810 is delivered in a special, protective shipping container
and was carefully inspected both mechanically and electrically before
shipment. It should be physically free of mars and scratches and in
perfect electrical order upon receipt. To confirm this, the product
should be inspected for physical damage that may have occurred in
transit. Any damage should be reported to your dealer or delivery
company as soon as possible.
If installed in an equipment rack that also contains heat producing
equipment, adequate ventilation should be provided. This will prolong
component life and maximize operational stability.
To insure adequate airflow around the unit and to prevent overheating,
do not obstruct the air vents on the side and top.
While the internal circuitry of the EQF 810 is fully shielded by the steel
chassis, installation should nevertheless be planned to avoid locating it
immediately adjacent to power amplifiers, power supplies, or any
source of low frequency electromagnetic emissions.
General
Unpacking and inspection
Environmental considerations
Chapter 2 Installation Section 5
The ground pin of the power cord and power inlet are internally
connected to the chassis. To avoid electrical shock, plug the EQF 810
into a properly wired AC receptacle. For safety reasons, do not lift the
ground on the power plug by using a ground lift adapter.
Upon loss of a protective ground connection, all accessible conductive
parts, including knobs and controls that may appear to be insulating,
can render an electric shock.
The location of the EQF 810 should be such that the operator has a
clear, unobstructed view of the front panel from his/her normal
operating position. The unit should also be within easy reach of the
operators normal position in order to facilitate the use of the front panel
controls
The ½ rack form factor of the EQF 810 allows a single unit to be
mounted on a table top with the (4) rubber bumpers (supplied), multiple
units stacked, or two units mounted side-by-side on a 1U rack shelf.
1 rack space (1U) rack shelves are manufactured by:
• Middle Atlantic Products, Model UTR1
• Raxxess, Model UNS1.
When attaching the EQF 810 to the rack shelf, it should be secured with
(3) 6-32 x ½” machine screws (supplied). Do not use screws that are
longer than ½” in length as they could damage the internal circuit
board. When a single or multiple EQF 810’s are mounted to the rack
shelf, they may be installed into any 19" wide equipment rack that uses
standard E.I.A. universal spacing.
Any device that emits a high EMI (Electro Magnetic Interference) or
RFI (Radio Frequency Interference) energy field should be treated with
suspicion. EMI is considered any unwanted signal which adversely
affects the operation of the EQF 810 or the audio system. This subject
is discussed in Chapter 4.
Electronic equipment such as power amplifiers, power supplies, video
monitors, computers, certain synths, and samplers should be located
away from the EQF 810 and its associated audio cables. It may be
necessary to alter the positions of certain equipment that you feel would
cause buzzes or hums in the audio system.
Mechanical installation
Physical placement of
adjacent equipment
Grounding the product
Chapter 2 Installation Section 6
Table des matières
Autres manuels Speck Égaliseur stéréo
