Q66 Stereo P
ower Amplifier
Q66 Stereo Power Amplifier
2
Architects’ and Engineers’
Specifications
The power amplifier shall be a dual-channel
model of solid-state design employing high-
power output devices in a true-complemen-
tary-symmetry output circuit. It shall be ca-
pable of operating from a 120/220/240-V, 50/
60 Hz ac line. The power amplifier shall meet
various worldwide safety standards includ-
ing Underwriter’s Laboratories UL-813 stan-
dard, Canadian Standards and CE standards.
The power amplifier shall contain a limiter
circuit driven by a high-quality input/output
comparator to protect the load from damage
by amplifier clipping. The amplifier shall
contain sensing circuitry to provide protec-
tion for the output transistors against
overtemperature, excessive output voltage,
shorted loads, excessive phase shift and
back-EMF current. The load shall be simi-
larly protected against start-up/shutdown
transients, low ac line voltage and dc.
Rear-mounted controls shall include detented
level potentiometers for each channel, an
input routing switch for selecting dual/ste-
reo or parallel mono operation, a switch for
selecting dual/stereo or bridged operation
and a chassis groundlift switch. Rear-
mounted input connectors shall include a 3-
pin female XLR-type connector wired in
parallel with a male 3-pin XLR-type output
connector for signal routing. Output connec-
tors shall be Neutrik Speakon NL4MP’s for
channels A and B, and another for bridged
operation.
Front-panel indicators shall include power
on, a protection indicator and separate sig-
nal present and limiter indicators for each
channel. Front-panel controls shall include
a power on switch.
The power amplifier shall meet the follow-
ing performance specifications: rated output
power from 20-20,000 Hz at less than 0.2%
THD, each channel 300 watts into 8 ohms,
500 watts into 4 ohms and 650 watts into
2 ohms. In bridged mode at 1 kHz, the
amplifier shall deliver 1,200 watts into
8 ohms and 1,700 watts into 4 ohms. Hum
and noise shall be at least 103 dB
(A weighted) below rated output power;
damping factor shall be greater than 300
at any frequency up to 1 kHz in any mode
with an 8-ohm load; THD (total harmonic
distortion) shall be less than 0.05% at 1 kHz
at rated output power; crosstalk shall be bet-
ter than -80 dB at 1 kHz at rated output
power; transient intermodulation distortion
(DIM 30), shall be less than 0.03%. Dimen-
sions shall be 132.5 mm (5.25 in) high x 483
mm (19.0 in) width x 385.5 mm (15.7 in)
deep. Net weight shall be 16 kg (35.2 lb).
Color shall be light gray.
The power amplifier shall be the Electro-
Voice Q66.
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 service repre-
sentatives. Obtaining Warranty Service:
To obtain warranty service, a customer must
deliver the product, prepaid, to Electro-Voice
Service or any of its authorized service rep-
resentatives together with proof of purchase
of the product in the form of a bill of sale or
receipted invoice. A list of authorized ser-
vice representatives is available from Electro-
Voice Service at 600 Cecil Street, Buchanan,
MI 49107 (800/234-6831 or FAX
616/695-4743). Incidental and Conse-
quential Damages Excluded: Product re-
pair or replacement and return to the customer
are the only remedies provided to the cus-
tomer. Electro-Voice shall not be liable for
any incidental or consequential damages in-
cluding, without limitation, injury to persons
or property or loss of use. Some states do not
allow the exclusion or limitation of inciden-
tal or consequential damages so the above
limitation or exclusion may not apply to you.
Other Rights: This warranty gives you spe-
cific legal rights, and you may also have other
rights which vary from state to state.
Electro-Voice Electronics are guaranteed
against malfunction due to defects in mate-
rials or workmanship for a period of three
(3) years from the date of original purchase.
Additional details are included in the Uni-
form 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.