Crown Audio PT 3.1 specifications Features, Specifications, Power, Controls, Performance

P O W E R - T E C H S E R I E S

PT 3.1

It’s hard to please every crowd. But you’ll have a better chance when you use a Crown Power-Tech .1 Series amplifier. Musicians

and DJs alike demand a lot from their sys- tems—clean, punchy sound; reliability; rug- gedness; smaller size; less weight—all at a reasonable price. And Crown PT .1s bring these benefits and much more to the table. That’s because at Crown, we’ve built our repu- tation around legendary sound and support.

Power-Tech .1 Series amplifiers are compact, professional stereo power amplifiers engi- neered to meet the most demanding sound reinforcement needs. They compare very favorably to more expensive amplifiers, pro- viding uncolored sound and signal-to-noise ratios commonly associated with recording studios. Plus, every Power-Tech .1 amplifier is backed by Crown’s unequaled Three-Year, No- Fault, fully-transferrable warranty that covers

Features

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

everything.

With over five 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.

Specifications

The following applies to units in Stereo mode with 8-ohm loads and an input sensitivity of 26 dB unless otherwise specified.

120 VAC, 60 Hz Units: refers to amplifiers with dedicated transformers for 120 VAC, 60 Hz power mains.

International Units: refers to amplifiers with special multi-tap transformers that make them configurable for several AC

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 band- width power from 50 Hz to 4 kHz, rising linearly to greater than 70 dB at 20 kHz.

Controlled Slew Rate: Greater than 13 volts/ms.

Voltage Gain: 84:1 ±6% or 38 dB ±0.5 dB at 0.775-volt sensitivity; 46:1 ±6% or 33 dB ±0.5 dB at 1.4-volt sensitivity; 20:1 ±6% or 26 dB ±0.5 dB at the maximum level setting.

Power

Output Power:

in Bridge-Mono and 2 to 4 ohms in Parallel- Mono mode.

Required AC Mains: Power requirements are provided on each unit’s 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 15 amps of current; 220 and 240 VAC units draw up to 7 amps.

Low-Voltage Power Supply: A ±24 VDC fan- former 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

mains voltages and line frequencies.

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.

Load Impedance: Safe with all types of loads. Rated for 4 to 8 ohms in Stereo, 8 to 16 ohms

Power: A front panel push button switch used to turn the amplifier on and off.

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.

Reset: A back panel push button switch used to reset the circuit braker that protects the power supplies.