WARWICK / Rockboard HA 4 4-Channel Headphone Amplifier

The RockBoard HA 4 is an extremely compact headphone amplifier that can distribute a stereo input signal to four independent headphones.

Each of the four output channels features an amplifier and volume control, delivering professional-quality audio to every pair of headphones. Its robust and compact design makes the HA4 ideal for studio and live use. Up to four people can listen to the main mix during recording sessions, and up to four musicians can listen to backing tracks at their preferred volume during practice sessions.

*Caution*
This headphone amplifier can generate high sound pressure levels. Continuous, unprotected exposure to such high sound pressure levels can cause permanent and irreversible hearing damage. If you experience hearing loss or tinnitus, consult a doctor.

■Specifications
• Compact headphone amplifier system for stage and studio use
• Four independent high-performance stereo amplifiers
• Independent volume control for each output
• Suitable for all types of headphones
• Superior sound quality at all volume levels
• High-quality components and robust metal housing
• 12V DC / 40 mA, 2.1 x 5.5 mm barrel plug, center negative, power adapter included
• Input: 1 x 6.35mm (1/4 inch) TRS jack
• Output: 4 x 6.35mm (1/4 inch) stereo (TRS) jacks
• SNR: 82 dB
• THD: 0.009%
• Frequency response: +1 dB / -2 dB @ 20 Hz - 22 kHz
• Gain: 20 dBu
• Dimensions (L x W x H), including knobs and feet: 102 x 58 x 45 mm / 4.02 inches x 2.28 inches x 1.77 inches
• Weight: 182 grams / 0.40 pounds