TEYUN PH-4 Headphone Amplifier — 4 Channels, 8 Outputs (Up to 8 Listeners)

Four independent headphone channels, each with its own volume — so the whole band can monitor at their own level instead of arguing over one output. Each channel has both a 6.35mm and a 3.5mm socket, so eight people can listen at once without adapters.

Highlights

• Eight headphone outputs — 4 × 6.35mm plus 4 × 3.5mm, so no adapters needed
• Four independent volume controls, no crosstalk between channels
• Stereo / Mono switching for single-ear or mono sources
• Peak and Signal LEDs per channel so you can see before you hear
• Link socket for chaining a second unit
• All-metal case built for studio and rehearsal use

Specifications

• Model: TEYUN PH-4
• Type: 4-channel headphone amplifier / splitter
• Outputs: 4 × 6.35mm (1/4") + 4 × 3.5mm, gold-plated — 8 total
• Inputs: RCA L / R, plus Link socket
• Controls: Level 1–4 (independent)
• Switch: Stereo / Mono
• Metering: Peak and Signal LED per channel
• Power: AC 12V, 300mA
• Housing: All-metal compact case

Specifications taken from the manufacturer's product documentation. Note this unit runs on 12V AC — not the 9V DC used by guitar pedals.