INFRA-QSOURCES Qam and QamB

Measurement power amplifier

High accuracy measurement amplifier, suitable for the powering of a range of different sound sources and shakers. This digital amplifier is build to be robust and portable, for efficient and reliable field measurements.

An internal signal module provides low crest pink- and white- noise signals for Qohm sources, or an external signal can be used. And a RF remote control is provide which allows to do remote activation of the amplifier.

Features:

  • Compact and portable housing for efficient field work
  • Hight voltage output, and continuous 750 Watt RMS output ability
  • High efficiency at high power levels.
  • Sturdy and well protected against thermal, electrical and mechanical overloads
  • Safe and signal protected RF remote.

Specifications of the Qam*:

Frequency range on an external signal: 20-40000 Hz +0/-3 dB
 Frequency range white and pink noise:  80-16000 Hz third octaves
 Amplification setting accuracy:  +/- 0.5 dB
 Voltage gain:   48 dB
 Distortion lower then:  0,04 % (below 90% of maximum output voltage)
 Maximum external input/output signal:  1 Volt pk-pk
 Maximum peak voltage output:  150 Volt pk-pk
 Maximum peak current output:  56 Ampere pk-pk
 Maximum power output  750 Watt RMS**
 Minimum load impedance:  2 Ohm
 Remote range and carrier frequency:  up to 100 m***, AM 433 MHz
 Weight:  2.3 kg
 Dimension:   24 * 20 * 10 cm
 Maximum mains power requirement:   900 Watt

 

 

 

 

 

 

 

 

 

 

 

 

* These specifications may be adapted if necessary to improve the quality of the product.
**When used with low crest-factor random white/pink noise signals during 2 minutes.
*** Range in free sight. The range can be influenced by metal structures.

Applications:

  • Field and laboratory measurements
  • Powering Qohm or QohmB mid frequency sources
  • Combining a Qam with a QamS slave amplifier for Qohm30 or Qohl6 sources
  • Powering any medium impedance electrodynamic shaker or speaker/sound source.

Versions:

  • Qam, high output voltage and high acuracy amplifier for mains operation (2.3 Kg)
  • QamB high effeciency battery and mains driven amplifier for off-grid work (2.6 kg inclding cabling)
  • QamS slave power amplifier without signal and remote controle for mains operation, to be combined with Qam (2.2 Kg)