The ultra-compact HM-4 4-Way Headphone Amplifier features a 1/4” stereo input and four 1/4" headphone outputs with individual level controls. Perfect for studios or even at home when up to four people want to listen together.

The go anywhere Headphone Amp delivers a musical quality and attitude that defines the spirit of Electro-Harmonix. As uniquely musical as it is portable, the ultra-light Headphone Amp let’s you practice as loud or funky as you want without waking up your old lady.

The 19” rackmount HM-400 4-Channel Headphone Amplifier offers an incredible amount of versatility and excellent sound quality in a single rack space. Perfect for professional applications including studios, Houses of Worship, practice spaces, and more. The HM-400 features a main input with level control plus stereo outs, aux inputs and EQ per channel with 12 total headphone outputs.

The 19” rackmount HM-800 8-Channel Headphone Amplifier offers up to 10 available mixes with a total of 16 headphone outputs. Perfect for professional applications including studios, Houses of Worship, practice spaces, and more. Featuring 2 discrete main inputs with level control plus stereo outs, aux inputs per channel.