from $240
The HP12U 12-Channel Headphone Amplifier with USB from AKG features two stereo input and six stereo output channels, each with two 1/4" outputs. It can be used to easily monitor your analog or digital equipment – without rewiring your headphones – by switching between inputs A and B. Simply connect multiple units if you need more channels. In addition, the HP12U can also be used as an external sound card by connecting input A to your computer via USB. Housed in a sturdy chassis, the HP12U is an ideal headphone amplifier for any recording session.
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 $240.
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 AKG HP12U 12-Channel Headphone Amplifier with USB is available at bhphoto, starting at $240.
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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