Directly Heated Tube (DHT) Preamplifier​​ Permalloy Input Transformer​​ Nanocrystalline Output BAL Balanced Input & Output​​
The CLP03 is our first directly heated tube amplifier developed over many years—a transformer-input, transformer-output preamplifier.
Utilizes American directly heated tubes, hermetically sealed in brass enclosures.
Features a large permalloy input transformer, nanocrystalline output transformer, copper-foil oil-immersed coupling capacitors, 66-step attenuator, and oxygen-free signal paths for high-end performance.
[Reference: http://bbs.hifi168.com/bbs/showtopic-257405.aspx]

I/O Configuration:

3 inputs: 2× RCA, 1× XLR (balanced)
2 outputs: 1× RCA and 1× XLR (selectable via rear toggle switch; only one output active at a time)
Specifications:

Frequency response: 20Hz–20kHz (±0.3dB)
Noise level: –100dB
THD: ≤0.05% (1V, 1kHz)
Dimensions: 425×330×110mm (W×D×H)
Net weight: 10.5kg
Operation Notes:

Power-on sequence: Red LED lights up initially; switches to green after ~20 seconds (output enabled).
Output selection: Only RCA or XLR can be used at a time (toggle via rear switch).
Volume control: 66-step attenuator with:
11 coarse steps (6dB/step) + 6 fine steps (1dB/step).
Dual-knob design for seamless adjustment from –66dB to 0dB.

Included Accessories:
4 ebony footers for vibration isolation.
Recommended placement: Triangular configuration (1 front + 2 rear) under normal use.
For heavy loads atop the preamp, use all 4 footers (one at each corner).