PJB HA-2 Bighead Pro Mobile Headphone Amp/Digital Interface




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The functionality and performance of the HA-2 is a highly recommended portable tool to have in your gig bag for musicians of any level.

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PJB HA-2 Bighead Pro Mobile Headphone Amp/Digital Interface

The HA-2, the second model in the Bighead series and an upgrade to the popular HA-1 Bighead, is a high resolution mobile USB audio interface that supports PCM playback with up to 384 KHz sample rate/24 bit resolution. On DSD playback, sample rates of 2.822MHz and 5.644 MHz are supported making it the ideal choice for musicians and engineers that desire high performance and the purest sound quality.

It has a rechargeable lithium ion dynamo that is ideal for use in practice or recording situations. It also functions as a headphone booster amp as well as a preamp to drive powered amplifiers. The HA-2 has both passive and active instrument inputs with a 2 band EQ that is ideal for guitar and bass, but versatile enough for use with other instruments.

The internal lithium-ion rechargeable battery is fed by a convenient USB jack, so any computer or appropriate cell phone charger can charge it in less than 3 hours - but it can play for up to 8 hours.

PJB HA-2 Bighead Pro Mobile Headphone Amp/Digital Interface Specifications:

  • Power Output : 300mW per channel
  • Frequency Response : 10Hz - 40KHz
  • Headphone Impedance: 16 - 64 Ohms
  • Controls : Master Volume, Input Gain, Treble/Bass (for instrument input signal), On/Off Switch
  • Inputs :  1/4” instrument input, 1/8”AUX Input, USB DC Input
  • Outputs : 1/8” Headphone out, 1/4” Line Out, Micro-USB Digital Interface
  • Power : Internal lithium-ion Rechargeable Battery or USB Power
  • Dimension (W x D x H) : 7.62cm x 15cm x 2.3cm | 3" x 5.9" x 0.9"
  • Weight : 290 g | 0.6lbs 
  • Extras : Soft Carry Bag, 1/8” to 1/8” Stereo Signal Cable, Micro-USB Cable