Filter
Top Products
EQ-231/Graphic Equalizer
EQ-231/Graphic Equalizer
2
The equalizer shall meet or exceed the fol-
lowing performance specifications: fre-
quency response at unity gain, …1 dB 20 -
20,000 Hz; total harmonic distortion less than
0.01%, 20 - 20,000 Hz at 0 dBu; a noise level
of less than -97 dBu; gain of ±6 dB or ±12
dB; balanced-input impedance of 44,000
ohms; output impedance of 120 ohms; a
maximum input level of +20 dBu at unity
gain; a maximum output level of 20 dBu into
loads greater than or equal to 600 ohms.
The equalizer shall operate on 120 V/240 V
ac, 50/60 Hz, and consume less than 18 watts.
The unit shall be operable over the tempera-
ture range as high as 50 degrees Centigrade
or 122 degrees Fahrenheit. The chassis shall
be steel with a gray front panel and black
top, bottom, sides and back with white no-
menclature. The chassis shall occupy one
rack space in a standard 19-inch rack (height:
3.46 inches; depth: 9.24 inches; width: 19
inches). The weight shall be 8.8 lb (4.0 kg).
The equalizer shall have a three-year parts
and labor warranty. The equalizer shall be
the Electro-Voice EQ-231.
Limited Warranty
Electro-Voice products are guaranteed
against malfunction due to defects in mate-
rials or workmanship for a specified period,
as noted in the individual product-line
statement(s) below, or in the individual prod-
uct data sheet or owner’s manual, beginning
with the date of original purchase. If such
malfunction occurs during the specified pe-
riod, the product will be repaired or replaced
(at our option) without charge. The product
will be returned to the customer prepaid. Ex-
clusions and Limitations: The Limited
Warranty does not apply to: (a) exterior fin-
ish or appearance; (b) certain specific items
described in the individual product-line
statement(s) below, or in the individual prod-
uct data sheet or owner’s manual; (c) mal-
function resulting from use or operation of
the product other than as specified in the
product data sheet or owner’s manual; (d)
malfunction resulting from misuse or abuse
of the product; or (e) malfunction occurring
at any time after repairs have been made to
the product by anyone other than Electro-
Voice Service or any of its authorized ser-
vice representatives. Obtaining Warranty
Service: To obtain warranty service, a cus-
tomer must deliver the product, prepaid, to
Electro-Voice Service or any of its autho-
rized service representatives together with
proof of purchase of the product in the form
of a bill of sale or receipted invoice. A list of
authorized service representatives is avail-
able from Electro-Voice Service at 600 Cecil
Street, Buchanan, MI 49107 (800/234-6831
or FAX 616/695-4743). Incidental and
Consequential Damages Excluded: Prod-
uct repair or replacement and return to the
customer are the only remedies provided to
the customer. Electro-Voice shall not be li-
able for any incidental or consequential dam-
ages including, without limitation, injury to
persons or property or loss of use. Some
states do not allow the exclusion or limita-
tion of incidental or consequential damages
so the above limitation or exclusion may not
apply to you. Other Rights: This warranty
gives you specific legal rights, and you may
also have other rights which vary from state
to state. Electro-Voice Electronics are guar-
anteed against malfunction due to defects in
materials or workmanship for a period of
three (3) years from the date of original pur-
chase. Additional details are included in the
Uniform Limited Warranty statement.
For warranty repair or service informa-
tion, contact the service repair department
at: 616/695-6831 or 800/685-2606.
For technical assistance, contact Technical
Support at 800/234-6831 or 616/695-6831,
M-F, 8:00 a.m. to 5:00 p.m. Eastern Stan-
dard Time.
Specifications subject to change without
notice.
FIGURE 1 — Filter Response at
Different Slider Positions Showing Q of
Filter Changing.
FIGURE 2 — Filter Response at ±12-dB
Slider Positions
OUTPUT IN dB
OUTPUT IN dB