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Description
The HA420 4-Channel Stereo Headphones Amplifier by SKP
The SKP HA420 is a compact and practical 4‑channel stereo headphone amplifier designed to distribute a single stereo audio signal to up to four separate headphones, each with its own independent volume control for flexible personal monitoring. It’s ideal for home studios, rehearsal spaces, language labs, or small broadcast setups where multiple listeners need control over their own headphone levels. The unit accepts a single ¼″ stereo input and provides four 6.35 mm (¼″) stereo outputs, allowing easy connection of professional‑style headphones. With high signal‑to‑noise ratio and decent gain, it keeps audio clean when multiple users are connected simultaneously. Each output channel has low output impedance to help drive a range of headphone types without undesirable loading effects. Its lightweight, desktop form factor and simple controls make it straightforward to integrate into existing rigs without fuss. The HA420 runs from a DC power source (12–18 V) and is built as a dependable listening companion in group monitoring situations. Overall, it’s a budget‑friendly solution for expanding headphone monitoring without needing multiple individual amps.
Specs:
• Type: 4‑channel stereo headphone amplifier
• Channels: 4 independent stereo outputs with individual volume controls
• Input Connector: ¼″ (6.35 mm) TRS stereo
• Input Impedance: 1000 kΩ
• Maximum Output Level: +22 dB per channel
• Maximum Gain: ~20 dB per channel
• Output Connector: Four 6.35 mm (¼″) stereo headphone jacks
• Output Impedance: Minimum 10 Ω per channel
• Signal‑to‑Noise Ratio (S/N): > 98 dB
• Power Supply: DC ~12–18 V (adapter included)
• Form Factor: Compact desktop unit
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