Rockboard HA 4 | Compact 4-Channel Headphone Amplifier

The RockBoard® HA 4 delivers professional-grade audio distribution for studios and live venues. This compact four-channel headphone amplifier lets up to four musicians or listeners enjoy independent volume control and pristine sound quality simultaneously. Perfect for recording sessions where multiple band members need to monitor the mix, or rehearsals where each performer requires a personalized backing track level. Built tough for demanding environments, the HA 4 combines robust construction with intuitive operation—making it the go-to solution for anyone serious about shared audio monitoring.

• compact headphone amplifier system for stage and studio applications
• four separate high performance stereo amplifiers
• separate volume control for each output
• suitable for all types of headphones
• top sound quality at all volume levels
• high-quality components and robust construction with metal enclosure
• 12V DC / 40 mA, 2.1 x 5.5 mm barrel plug, center negative, power supply included
• input : 1 x 6.35 mm (1/4") TRS jack
• output: 4 x 6.35 mm (1/4") stereo (TRS) jack
• 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) incl. knobs and feet: 102 x 58 x 45 mm / 4.02” x 2.28” x 1.77”
• weight: 182 gr / 0.40 lbs