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The JBL LIBRA 250 Mixer Amplifier with USB. The Libra 250 is 250 Watts PA Amplifier with USB. The JBL Libra 250 amplifier is a professional tool with a sleek industrial look, designed and built for demanding commercial sound applications. The latest Drive Core technology from Crown is built in, which significantly reduces size and weight, and all amps are highly efficient, fan less, and simple to install and operate.

More Information

JBL Libra 250 Key Features:

  • Supports portable and desktop installation, for both outdoor and indoor use.
  • Multiple inputs for speeches, music, paging, etc.
  • Extendable with its preamp/line output
  • Easy to expand at large-scale venues – Scalability with the preamp/line output for Crown amplifiers for larger applications.
  • Portable Design
  • Overload & low voltage protection.
  • For various PA applications.
  • AC & DC Power Supply.
  • AC power supply to ensure the running of system when power is switched off, DC power supply for outdoor usage.

Technical Specification


Brand JBL
Model Libra 250
Type 250 Watt Amplifier
Power Supply (AC) 240V 50/60 Hz
Power Supply (DC) 24 V
Rated Power (at THD 10% 240 VAC,1kHz,4Ω) 250 W
DC Power Supply Output Power  ≥ 50% rated power
Tone Controls (Bass) ± 10 dB at 100 Hz
Tone Controls 2 x ( ≥ 16 AWG) Cables
Barrier Strip 4Ω/8Ω & 70/100V, (with touch proof cover)
Frequency Response 50-15,000 Hz ± 3dB
Output Regulation ≤ 3 dB,no load to full load at 1kHz
Signal to Noise ratio ≥ 70 dB
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