Q66
Stereo Power Amplifier
• 380 watts per channel at 8 ohms; 600 watts per channel at 4 ohms; and 850 watts per channel at 2 ohms at 1 kHz
• 1,200 watts bridged at 8 ohms; 1,700 watts bridged into 4 ohms at 1 kHz
• State-of-the-art limiters driven by a sophisticated input/output comparator ensure freedom from amplifier clipping
• High-current Neutrik Speakon® output connectors for channels A, B and bridged operation for loss-free connections
• Active-balanced XLR-type input and paralleled XLR-type output connectors provide easy signal routing
• Rear-mounted dB-scaled detented level controls for easy control of gain
Description
The Electro-Voice Q66 amplifier is a very high-quality power amplifier designed to elicit excellent performance from any speaker system. Its low distortion and substantial headroom ensure that program material will be accurately amplified.
Each channel of the Q66 delivers more than 300-watts continuous average power into 8 ohms, 500 watts into 4 ohms and 650 watts into 2 ohms over the full audio frequency range. In the bridged mode, the amplifier can deliver more than 1,200 watts into 8 ohms and 1,700 watts into 4 ohms at less than 1% THD. The power supply with its large torodial transformer gives the amplifier impressive headroom and current output capability.
The Q66 contains 20 high-power output devices with 5,000 watts of dissipation capability. These devices are protected from overheating by two, three-speed temperature-sen- sitive fans. The fans are quiet enough to permit use of the Q66 in noise-sensitive applications such as recording studios and houses of worship.
The output devices are mounted to two large, extruded aluminum heat sinks that are engi-
neered to minimize thermal gradients and allow the amplifier to operate safely into lowimpedance loads. The output devices have a maximum junction temperature of 200o C (392o F), so high operational temperatures present no problems. The output devices are mounted directly to the heat sinks without mica insulators to ensure better dissipation of heat.
The Q66 has sophisticated protection circuits that guard it and the load from problems. Protection circuits guard against overload, over-temperature, shorted outputs, radio-fre- quency interference and dc faults. The output devices are protected against damage from the reverse feeding of electrical energy (back EMF) from the load and are switched on via relays to avoid transients which could damage speakers.
The Q66 has built-in limiters to protect speakers from the deleterious effects of amplifier clipping. The limiter’s action is controlled by very sophisticated input/output comparators which are designed to preserve the sonic integrity of the source.
The Q66 has electronically-balanced XLRtype input and signal output connectors that allow easy, problem-free connections and signal routing. The amplifier has an input
routing switch that allows selection of either normal dual-channel operation or parallel mono operation, which routes an input to both channels but still allows independent level control.
The Q66’s professional Neutrik Speakon ® output connectors provide sturdy, reliable connections and allow use of heavy wire for loss-free signal transmission. There are separate output connectors for channels, A and B, and for the bridge mode. The bridge mode connector is sealed with a plastic cover to prevent connection errors.
To prevent ground loops from occurring, the Q66 is equipped with a ground-lift switch. When the amplifier is operated in a rack with units of different ground potential, the switch may be adjusted to eliminate hum.
Separate potentiometers on the rear panel of the Q66 allow easy regulation of gain. There is easily readable nomenclature to ensure easily repeatable control settings.
The Electro-Voice Q66 is an excellent choice for high-quality professional sound system applications which require excellent sound quality, speaker protection and the highest level of construction quality and long-term reliability.
Q66 Stereo Power Amplifier
Q66 Stereo Power Amplifier
Architects’ and Engineers’
Specifications
The power amplifier shall be a dual-channel model of solid-state design employing highpower output devices in a true-complemen- tary-symmetry output circuit. It shall be capable of operating from a 120/220/240-V, 50/ 60 Hz ac line. The power amplifier shall meet various worldwide safety standards including Underwriter’s Laboratories UL-813 standard, 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 protection for the output transistors against overtemperature, excessive output voltage, shorted loads, excessive phase shift and back-EMF current. The load shall be similarly 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/stereo or parallel mono operation, a switch for selecting dual/stereo or bridged operation and a chassis groundlift switch. Rearmounted 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 connectors 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 signal present and limiter indicators for each channel. Front-panel controls shall include a power on switch.
The power amplifier shall meet the following 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 better than -80 dB at 1 kHz at rated output power; transient intermodulation distortion (DIM 30), shall be less than 0.03%. Dimensions 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 ElectroVoice Q66.
Limited Warranty
Electro-Voice products are guaranteed against malfunction due to defects in materials or workmanship for a specified period, as noted in the individual product-line statement(s) below, or in the individual product data sheet or owner’s manual, beginning with the date of original purchase. If such malfunction occurs during the specified period, the product will be repaired or replaced (at our option) without charge. The product will be returned to the customer prepaid. Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or appearance; (b) certain specific items described in the individual product-line statement(s) below, or in the individual product data sheet or owner’s manual; (c) malfunction 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 representatives. Obtaining Warranty Service:
To obtain warranty service, a customer must deliver the product, prepaid, to Electro-Voice Service or any of its authorized 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 available from ElectroVoice Service at 600 Cecil Street, Buchanan, MI 49107 (800/234-6831 or FAX 616/695-4743). Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer are the only remedies provided to the customer. Electro-Voice shall not be liable for any incidental or consequential damages including, without limitation, injury to persons or property or loss of use. Some states do not allow the exclusion or limitation 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 guaranteed against malfunction due to defects in materials or workmanship for a period of three
(3) years from the date of original purchase. Additional details are included in the Uniform Limited Warranty statement.
For warranty repair or service information, 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 Standard Time.
Specifications subject to change without notice.
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