from $185.56
The RDL ST-SH2 is a compact, stick-on series stereo headphone amplifier designed to provide high-fidelity audio output for a single pair of headphones. It features balanced or unbalanced line inputs via screw terminals and delivers up to 250 mW into 8 Ohms, accommodating headphones with impedances from 8 to 5000 Ohms. With an impressive dynamic range of over 115 dB, a frequency response of 20 Hz to 40 kHz (±0.25 dB), and exceptionally low THD+N (typically < 0.0015% at 1 kHz), the ST-SH2 ensures clear, accurate sound reproduction for professional audio monitoring or personal listening applications.
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 $185.56.
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 RDL ST-SH2 Stick-On Series Stereo Headphone Amplifier is available at bhphoto, starting at $185.56.
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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