from $99.99
The Samson QH4 4-Channel Headphone Amplifier is a compact and versatile amplifier designed to distribute audio to multiple headphones. It features two 1/4" TRS balanced inputs and one 1/8" / 3.5 mm TRS unbalanced stereo input, feeding four independent 1/4" TRS unbalanced outputs, each with its own volume control, plus an additional 1/8" / 3.5 mm TRS unbalanced output. With a frequency response of 17 Hz to 47 kHz (-3 dB) and a dynamic range of 22 dB, the QH4 delivers clear audio for monitoring and playback in home studios, practice spaces, or educational settings.
Match your amplifier's power output (Watts RMS) to your speakers' sensitivity and impedance (Ohms). Do not obsess over astronomical peak wattage claims; RMS is the true measure of sustained power. Available from $99.99.
Amplifiers have practically zero ongoing costs aside from electricity, which is highly variable based on usage volume and class type (Class A uses more power than Class D). Good amplifiers can last decades with proper care. Consumables are virtually non-existent unless using tube amps.
Common Failure Modes
Solid-state amplifiers are extremely reliable. Failures usually stem from blown capacitors, overheated output transistors, or physical wear on volume potentiometers. Proper ventilation prevents 90% of heat-related failures.
Match your amplifier's power output (Watts RMS) to your speakers' sensitivity and impedance (Ohms). Do not obsess over astronomical peak wattage claims; RMS is the true measure of sustained power. Class D amplifiers run cool and are compact, while Class A/B offer traditional warm sound at the expense of heat and size.
Solid-state amplifiers can last 20+ years. Capacitors may eventually dry out and need replacement.
The Samson QH4 4-Channel Headphone Amplifier is available at bhphoto, starting at $99.99.
Amplifiers have practically zero ongoing costs aside from electricity, which is highly variable based on usage volume and class type (Class A uses more power than Class D). Good amplifiers can last decades with proper care. Consumables are virtually non-existent unless using tube amps.
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