Crown PSA-2 Self-Analyzing Amplifier *Customer Trade-In*

Crown has proven throughout the years to be a company that top sound professionals rely and stake their reputations on. The PSA-2, a high-technology stereo amplifer, is another example of Crown's dedication to providing pure sonic quality and indestructibility for professional sound reinforcement.

This premium Crown amplifier can deliver an unprecedented 915 watts in bridged mono mode into 8 ohms at 0.1% T HD. Stereo power is over 460 watts per channel into 4 ohms or 275 watts into 8 ohms. The PSA-2 delivers highly reliable, clean power to a demanding market.

Patented Crown circuitry allows extreme voltage swings without putting output transistors in series, thus lower distortion and greater reliability. The Output Device Emulator Protection circuit (ODEPTM ) simulates the output transistors, and detects and compensates for overheating and overload. The efficient heat sinking and forced-air cooling system prevent overheating to protect your investment.

A two-position switch selects stereo, or parallel mono modes.
Legendary Crown performance reaches to new peaks—the PSA-2.

Feature Summary

• Ultimate Protection: On-board analog computers compare the operating condition of the output transistors to their safe operating area (SOA) and limit the drive level to them if their SOA is exceeded.
  
• Distortion Indicator: Advanced IOC@ (Input/0utput Comparator) alerts the user in the unlikely event that distortion of any kind exceeds 0.05%.
  
• Exceptionally Low Distortion: Advanced Multimode?' AB+B design results in exceptionally low distortion.
  
• Bridge-Mono Mode: Bridge-Mono mode is provided for double output voltage.
  
• Efficient Cooling: Two-speed forced-air cooling with high-efficiency coolers prolong component life.
  
• No-Fault Warranty: A 3-year standard "No-Fault" warrantyl which may be extended for an additional three years. Includes round-trip shipping.
  
• Performance
  
• Note: The following performance measurements were made in Stereo mode with both channels driven into an 8 ohm load.
  
• Frequency Response: ±0.1 dB from 20 Hz to 20 kHz at 1 watt. +0, -1.5 dB from DC (0 Hz) to 80 kHz.
  
• Phase Response: +0 0 -15 0 from DC (0 Hz) to 20 kHz at 1 watt.
  
• Signal to Noise Ratio: 1 15 dB (A-weighted) at full output.
  
• Total Harmonic Distortion (THD): from 20 Hz to 1 kHz and increasing linearly to 0.05% at 20 kHz at 220 W.
  
• Intermodulation Distortion (IMD): <0.01 % from
  
• 0.25 W to 220 W.
  
• Slew Rate: >30 V per microsecond.
  
• Damping Factor: >700 from DC (0 Hz) to 400 Hz.
  

Power

• Output Power
  
• Note: Maximum average power at 1 kHz with
  
• 0.1% THD.
  
• Stereo: 700 W per channel into 2 ohms. 460 W into 4 ohms. 275 W into 8 ohms. Bridge-Mono: 915 W into 8 ohms.
  
• @crowno
  
• Load Impedance: Rated for 16, 8, 4, 2 ohm use.
  
• Safe with all types of loads, even reactive ones.
  
• Required AC Mains: 50-400 Hz AC with selectable transformer taps for 100, 120, 200, 220 and 240 V (±10%) operation.
  
• AC Line Connector: Standard three-wire grounded connector.
  

Controls

• Power: A two-position rotary switch, located on the front panel, turns the amplifier on and off. Level: A signal level control for each channel, located on the front panel.
  
• Stereo-Mono: A two-position switch, located on the back panel, selects between Stereo and Bridge-Mono modes of operation.
  
• Low Freq Protect: A two-position switch, located on the back panel, activates subsonic protection circuitry.
  
• Delay: A two-position switch, located on the back panel, activates a 4-second turn-on delay to protect loudspeakers from unwanted transients.
  
• Indicators
  
• On: An amber indicator which shows the unit has been turned on.
  
• Standby: Normally off, these yellow indicators turn on if a channel is placed in STANDBY mode.
  
• Signal: These green indicators flash synchronously with the input signal to show its presence.
  
• IOC: Normally off, these red indicators flash in the rare event the output waveform differs from that of the input by 0.05% or more.
  
• Input/Output
  
• Input Connector: Unbalanced lh-inch phone jack for each channel.
  
• Input Impedance: Nominally 25 K ohms.
  
• Input Sensitivity: 2.1 V for rated power into 8 ohms.
  
• Output Connector: Color coded binding posts (banana jacks).
  
• Output Impedance: <12 milliohms in series with <1 .2 microhenries.
  
• Chassis Ground: Two-terminal barrier block with shorting strap.
  
• Accessory: Rear internal plug accepts optional input modules.