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PA640
Six-Channel Power Amplifier

There are times when the demands of a customer for independent remote control of signal sources and volume level in individual rooms tells the installer this user needs a zone system. At the same time cost constraints and physical room for all the additional components make a normal zone system unacceptable ... until now. The answer is the Xantech flat pack design 6-channel 240-watt power amplifier.

 

Specifications
  • Number of Channels: 6
  • Rated Continuous Power, Each Channel: 8 Ohms 40 Watts (All 6 channels simultaneously driven, 20 Hz to 20 kHz, at rated THD, 8 Ohms)
  • Short Term Continuous Power, Each Channel: 8 Ohms > 50 Watts (2 channels driven, 1 kHz, at rated THD) 4 Ohms > 70 Watts
  • Bridged Power Output: 8 Ohms > 140 Watts (Short Term Continuous, one pair driven, 1 kHz, at rated THD)
  • Rated THD: < 0.08 %
  • S/N Ratio, A Weighted (ref. to rated power): > 96 dB
  • Frequency Response (@ 1 Watt, ± 3 dB): 8 Hz to 100 kHz
  • Input Sensitivity, Input Gain Position: Max. 0.2 V, Mid. 1.0 V, Min. 3.3 V
  • Power Supply: 120 VAC, 60 Hz
  • International version available.
  • Remote ON/OFF trigger voltage: +4 to +30 VDC
  • Dimensions: 12.25" x 13.5" x 3.6" (312mm x 343mm x 92mm)
  • Weight: 14.3 lbs.

 

Features
  • Cost/Size Efficiency. The PA640 features six 40-watt amplifiers. This gives the installer a 3-zone system with a stereo 40- watt amplifier for each zone. The low profile design, plus multiple amplifiers in a single package, delivers high quality at a reasonable price.
  • Input Level Flexibility. The input levels are individually adjustable from a low of 0.2 volts up to 3.3 volts. This gives the installer the ability to adjust the overall gain of the system or zone. For instance, there may be a need to adjust the amplifier to deliver a controlled, maximum sound level into a zone when the volume control on the preamp is set to maximum. This would act as a volume limiter for any particular zone.
  • 6-5-4-3 Output Flexibility. Each pair of amplifiers can be bridged to allow several channel and power output capabilities. It can be configured into four power packages as follows:
    • Six 40-watt amplifiers
    • One 100 and four 40-watt amplifiers
    • Two 100 and two 40-watt amplifiers
    • Three 100-watt amplifiers
    This gives the PA640 added use in many other applications, such as driving surround sound speaker systems.
  • Low Impedance Capability. Each amplifier is 2-Ohm safe under music conditions in stereo mode and 4-Ohm safe when bridged. This means you can drive two pairs of 8- ohm speakers in stereo mode in each zone with ease.
  • Discrete Output Devices. All output and driver transistors are separate devices connected in a full-complimentary Darlington configuration. This provides highest reliability in concert with highly linear dynamic performance free of T.I.M. and slew induced distortions.
  • Auto Protection Circuit. Protects the PA640 if a short or very low impedance is detected at the speaker terminals. Each amplifier pair is protected separately, with an LED indicator showing which pair is in protection. Normal operation is restored automatically within 3 to 4 seconds after the short is removed.
  • Remote ON/OFF Jack. This jack allows the PA640 to be powered on and off by a positive DC control voltage ranging between 4 and 30 volts. Specifically, it permits the 12 volt CO output from the ZPR68 to switch PA640's on and off automatically with zone power commands.