No specs yet (I know this sounds silly, but when you have no way to listen to, the only the way that makes sense is the specs), might be a high power gear, btw, the design guy uses Liquid Gold for years, so H20 gotta be some LG sound-alike, just assuming.
From Aliexpress:
Gordon GUSTARD H20 amp; pre-class full-balanced class A headphone amplifier;
Song Shide H20 technical characteristics:
• The post-stage amplifier circuit uses its own application for many years to separate the sub-line, each channel 2 pairs of power tube, a total of 8 pairs of power tube;
• Each channel uses two independent amplifying units to form a symmetrical output line, which outputs both single-ended and balanced;
• The front class consists of a separate 4-way amplifier circuit, using two LM49720 dual op amp;
• Have a separate pre-stage output, can be connected to active speakers or pure after the class;
• The use of matrix relay volume, effective to ensure that 4-way volume unanimous;
• Native full-balanced architecture, from input to volume control to before and after zoom, without any conversion, complete four-way architecture;
• Equipped with third gear gain (high middle low), amp and line (XLR) at the same time;
• There are three inputs: RCA * 1, XLR * 2 \
• The left and right channels each adopt a custom 50W audio ring transformer, completely independent of each other without interference;
• All aluminum chassis, full silver and all black colors available;
• Machine size: width 330 * deep 260 * high 65MM (without protruding parts);
• Packaging size: length 420 * wide 360 * high 175MM;
• Package weight: 6.5KG;
• International voltage AC100V-240V (manual adjustment);
• XLR interface definition: US standard (1, 2 hot, 3 cold).
H20 Parameters:
• Analog input:
RCA standard input group, input sensitivity typical value: 2Vrms; input impedance 47kΩ
XLR balanced input two groups, input sensitivity typical: 6Vrms; input impedance 2.4kΩ
• Front analog output (XLR):
Output impedance 200Ω
Frequency response: 20-80kHz /-0.1dB
Signal to noise ratio:> 122dB
Channel crosstalk: -130dB @ 1kHz
THD + N: <0.0004%
IMD: <0.0004%
• amp output:
Frequency response: 20-80kHz /-0.1dB
Signal to noise ratio:> 120dB
Channel crosstalk: -120dB @ 1kHz
THD + N: <0.0005% @ 6000mW into 32Ω LOAD
IMD: <0.0005% @ 6000mW into 32Ω LOAD
Maximum distortion output power 6000mW into 32Ω LOAD
Maximum output power
12000mW @ 32Ω (when THD = 1%)
• Load power:
64Ω 5360mW
150Ω 2680mW
300Ω 1340mW
600Ω 670mW
