HeadRoom Ultra Micro

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The headphone amplifier electronics inside the Micro Amp is a Class-A biased, emitter follower design based on the famous Walt Jung Diamond Buffer. It's a DC-coupled amp (no caps in the signal path), and the left & right channels are completely separate back to the power supply and separately decoupled too. The already excellent Texas Instruments OPA134 op amp of the standard Micro Amp is replaced throughout by the astronomically expensive OPA627, and all resistors and caps are of extraordinary reference-grade quality.

Specifications
Frequency Response: 10-50k, ±0.3
Dimensions: 4.5"(11.5cm)x 3.5"(9 cm) x 1.5"(3.8cm)
Weight: 8.8oz (250 grams)
Amplifier Group: The Micro Line
THD at 1V output: <.002
Input Impedance at 1kHz (ohms): 70k




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