Why HM-4

When you need more monitoring capacity fast, HM-4 delivers clean, simple distribution for up to four listeners from a single stereo feed—no mixer or interface upgrade required. Rugged “Built-Like-A-Tank” construction keeps it reliable session after session. 

Key features

• Share one stereo source to four headphones with independent volume per output.

• 1× 1/4″ TRS stereo input → 4× 1/4″ TRS headphone outs. 

• 12V power supply included (plug-in and go). 

• Rugged metal chassis (“Built-Like-A-Tank”). 

What’s in the box

• HM-4 headphone amplifier

• 12V power supply 

• Owner’s manual (PDF available online). 

Tech specs (highlights)

• Inputs/Outputs: 1 × 1/4″ TRS stereo input; 4 × 1/4″ TRS headphone outputs. 

• Power: 12V power supply (included).

• Size/Weight: approx. 4.3″ W × 2.0″ H × 2.3″ D, 0.5 lb. 

Note: Use a stereo 1/4″ TRS cable for the input. The HM-4 does not include the input cable.

SKU / identifiers

• MPN: 2058854-00 

• UPC / GTIN: 663961054057 Distributor SKU: HM-4