MK III vs Music Hall ph25.2
The ph25.2's power @ 8ω is 0.65W against the MK III's 0.35W, its thd 0.250% against 0.150%, its output voltage 0.7V RMS against 10.0V RMS, and its weight 3.63 kg (8 lbs) against 3 kg (7 lbs).
AI-generated product photo — not official manufacturer imagery.
MK III
Little DotAmplifiersTube AmplifiersHeadphone Amplifiers
Estimated price (community-sourced)
$270
Around — community and catalog average, updates slowly
About the MK III
The Little Dot MK III is a Class-A SEPP (single-ended push-pull), OTL tube headphone amplifier with preamplifier functionality. Its standard tube complement comprises two GE 5654 input/driver tubes and two Russian 6H6PI output tubes. It offers selectable voltage gain of 3×, 4×, 5×, or 10× and is intended for headphones from 32 to 600 ohms. Rated output is 350 mW at 300/600 ohms, 300 mW at 120 ohms, and 100 mW at 32 ohms. The published frequency response is 12 Hz–100 kHz (−1 dB), with 0.15% THD+N at 80 mW into 300 ohms. The amplifier has a 50 kΩ input impedance, a 600-ohm preamplifier output impedance, and RCA preamp outputs. It uses a solid aluminum chassis measuring approximately 270 × 175 × 123 mm and consumes about 30 W. The MK III is available in region-specific mains-voltage versions.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 0.35W @ 8Ω
- Amplifier Class
- A
- Input Impedance
- 50000Ω
Analog Output
Analog signal output specifications
- THD
- 0.150%
- Output Voltage
- 10.0V RMS
- Output Impedance
- 600Ω
Connectivity
Input and output connections
- Analog Inputs
- RCA
- Analog Outputs
- RCA
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 175 × 123 × 270 mm (W × H × D)
- Weight
- 3 kg (7 lbs)
Key Specifications
Power: 0.35W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions