from $136.99
The PreSonus HP2 is a personal stereo headphone amplifier designed for musicians and audio professionals. This compact unit provides a single headphone channel with a 1/8" TRS output, delivering 50 mW per side into 20 Ohms, and features a frequency response of 30 Hz to 20 kHz. Powered by a single 9V battery or an optional AC adapter, the HP2 includes a breakout cable with two XLR 3-pin mic inputs, making it ideal for on-stage monitoring or studio applications where precise, personal audio control is essential.
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 $136.99.
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 PreSonus HP2 Personal Stereo Headphone Amplifier is available at bhphoto, starting at $136.99.
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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