P O W E R - T E C H

S E R I E S

PT 2.1
ts hard to please every crowd. But youll have a better chance when you use a Crown Power-Tech.1 Series amplier. Musicians and DJs alike demand a lot from their systemsclean, punchy sound; reliability; ruggedness; smaller size; less weightall at a reasonable price. And Crown PT.1s bring these benets and much more to the table. Thats because at Crown, weve built our reputation around legendary sound and support. Power-Tech.1 Series ampliers are compact, professional stereo power ampliers engineered to meet the most demanding sound reinforcement needs. They compare very favorably to more expensive ampliers, providing uncolored sound and signal-to-noise ratios commonly associated with recording studios. Plus, every Power-Tech.1 amplier is backed by Crowns unequaled Three-Year, NoFault, fully-transferrable warranty that covers everything. With over ve decades of experience designing and building rock-solid products, Crown is the standard in amp technology. So check out the affordable, all-Crown Power-Tech.1. They are a powerful argument for quality and value! For more details about the Power-Tech.1 Series, contact the Crown Technical Support Group at 800-342-6939 or 219-294-8200. Also, visit the Crown Audio website at www.crownaudio.com.

Features

Rugged, professional power amplier built for the road. Quick-access front panel power switch and level controls. Turn-on delay for loudspeaker protection. Patented ODEP circuitry and Grounded Bridge design combine to provide performance and reliability that surpass traditional designs. Easy to read signal presence (SPI) and distortion (IOC ) indicator for each channel. High damping factor provides superior control over low-frequency drivers for a clean, accurate low end. Bridge-Mono and Parallel-Mono modes make it easy to optimize the amplifiers performance for a wide range of loads. Balanced phone jack inputs in parallel with XLR input connectors. Complete protection against shorted outputs, mismatched loads, overheating, input/output DC and high-frequency overload; full internal fault protection. Three-year, No-Fault, fully-transferrable warranty completely protects your investment and guarantees its specications.

Specications

The following applies to units in Stereo mode with 8-ohm loads and an input sensitivity of 26 dB unless otherwise specied. 120 VAC, 60 Hz Units: refers to ampliers with dedicated transformers for 120 VAC, 60 Hz power mains. International Units: refers to ampliers with special multi-tap transformers that make them congurable for several AC mains voltages and line frequencies.
Intermodulation Distortion (IMD): (60 Hz and 7 kHz 4:1) Less than 0.05% from less than 171 milliwatts to full bandwidth power. Damping Factor: Greater than 1,000 from 10 Hz to 400 Hz. Crosstalk: Greater than 90 dB below full bandwidth power from 50 Hz to 2 kHz, rising linearly to greater than 66 dB at 20 kHz. Controlled Slew Rate: Greater than 13 volts/ms. Voltage Gain: 66:1 6% or 36 dB 0.5 dB at 0.775-volt sensitivity; 36:1 6% or 31 dB 0.5 dB at 1.4-volt sensitivity; 20:1 6% or 26 dB 0.5 dB at the maximum level setting.

Output Power:

Load Impedance: Safe with all types of loads. Rated for 4 to 8 ohms in Stereo, 8 to 16 ohms in Bridge-Mono and 2 to 4 ohms in ParallelMono mode. Required AC Mains: Power requirements are provided on each units back panel. 120 VAC, 60 Hz and 100/120/220/240 VAC, 50 to 60 Hz (non-convertible) units are available. Rated AC mains voltages are 10%. Quiescent power draw is 90 watts or less. 100 and 120 VAC units draw up to 10 amps of current; 220 and 240 VAC units draw up to 5 amps. Low-Voltage Power Supply: A 24 VDC fanformer supply (fan motor winding) regulated to 15 VDC. AC Connector: An appropriate AC line cord and plug are provided. North American units have a standard 3-wire, 15-amp grounded connector (NEMA 5-15P).

Controls Performance

Frequency Response: 0.1 dB from 20 Hz to 20 kHz at 1 watt. Phase Response: 10 degrees from 10 Hz to 20 kHz at 1 watt. Signal-to-Noise: A-weighted, better than 105 dB below full bandwidth power. Better than 100 dB below full bandwidth power from 20 Hz to 20 kHz. Total Harmonic Distortion (THD): Less than 0.05% at full bandwidth power from 20 Hz to 1 kHz increasing linearly to 0.1% at 20 kHz. Power: A front panel push button switch used to turn the amplier on and off. It is also a circuit breaker for the power supply. Level: A front panel rotary potentiometer for each channel used to control the output level. Stereo/Mono: A three-position back panel switch used to select Stereo, Bridge-Mono or Parallel-Mono mode. Sensitivity: A three-position switch behind the input module used to select the input sensitivity for both channels: 0.775 volts or 1.4 volts for standard 1 kHz power, or 26 dB voltage gain.

Indicators

Enable: This red indicator shows the on/off status of the low voltage power supply. Signal/IOC: Each channel has a two color indicator that ashes green to show signal presence and yellow if the amplier causes distortion of 0.05% or more.

Protection

Power-Tech.1 Series ampliers are protected against shorted, open or mismatched loads; overloaded power supplies; excessive temperature; chain destruction phenomena; input overload and high-frequency blowups. They also protect loudspeakers from input and output DC, as well as providing protection from turn-on/ turn-off transients. If operating conditions are unreasonable, the patented ODEP circuitry proportionally limits the drive level to protect the output transistors, particularly in the case of elevated temperature. A thermal switch imbedded in the transformer protects the power supplies from overload. In the rare event that a transformer overheats, the thermal switch removes power, waits until the unit has cooled to a safe temperature and then resets itself. Turn On: Four-second delay with no dangerous transients. Contact us if you need to change the delay.

Construction

Durable black nish on steel chassis with special ow-through ventilation from front to side panels. Cooling: Internal heat sinks with forced-air cooling for rapid, uniform heat dissipation. Dimensions: Standard 19-inch (48.3-cm) rack mount width (EIA RS-310-B), 3.5-inch (8.9-cm) height and 16-inch (40.6-cm) depth behind the mounting surface. Approximate Weight: Center of gravity is 6 inches (15.2 cm) behind front mounting surface. 120 VAC, 60 Hz Units: 33 pounds (15.0 kg) net; 37 pounds (16.8 kg) shipping weight. International Units: 35 pounds, 12 ounces (16.9 kg) net; 38 pounds, 13 ounces (17.6 kg) shipping weight.

Input/Output

Input Connector: Balanced 1/4-inch phone jacks and XLR connectors in parallel. Input Impedance: Nominally 20 K ohms, balanced; 10 K ohms, unbalanced. Output Connector: Two sets of color-coded binding posts. Output Impedance: Less than 10 milliohms in series with less than 2 microhenries. DC Output Offset: Less than 10 millivolts.

Output Signal

Stereo: Unbalanced, two-channel. Bridge-Mono: Balanced, single-channel. Channel 1 controls are active; Channel 2 controls should be turned down and not used. Parallel-Mono: Unbalanced, single-channel. Channel 1 controls are active; Channel 2 controls should be turned down and not used.
Crowns Three-Year, No-Fault, Fully Transferable Warranty
Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown amplieran unsurpassed industry standard. With this unprecedented No-Fault protection, your new Crown amplier is warranted to meet or exceed original specications for the rst three years of ownership. During this time, if your amplier fails, or does not perform to original specications, it will be repaired or replaced at our expense. About the only things not covered by this warranty are those losses normally covered by insurance and those caused by intentional abuse. And the coverage is transferable, should you sell your amplier. See your authorized Crown dealer for full warranty disclosure and details. For customers outside of the USA, please contact your authorized Crown distributor for warranty information or call 219-294-8200.

Crown International P Box 1000.O. Elkhart, IN 46515-1000 TEL: 219-294-8200 FAX: 219-294-8FAX www.crownaudio.com
Specications subject to change without prior notice. Latest information available at www.crownaudio.com. Crown, IOC, ODEP and Grounded Bridge are registered trademarks of Crown International. Other trademarks are the property of their respective owners. Printed in U.S.A. 2001 Crown Audio, Inc.

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