from $219
The Bellari HA540 MK2 is a tube-powered headphone amplifier designed to enhance your listening experience. Featuring a single 12AX7/ECC83 tube, it delivers a warm, detailed sound with a frequency response of 6 Hz to 51 kHz ±3 dB and a low THD of 0.04%. With multiple input options including stereo RCA and 3.5mm, and both 1/4" and 3.5mm TRS stereo outputs, this compact amplifier (6 x 5.4 x 2.5") is ideal for driving headphones with impedances ranging from 8 to 2000 Ohms, providing up to 332 mW per side into 30 Ohms.
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 $219.
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 Bellari HA540 MK2 Tube-Powered Headphone Amp is available at bhphoto, starting at $219.
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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