The CLS-050 is an all-tube pre-amplifier featuring a pair of the 6V6 tube and Custom made (made in Japan) line output transformer. Rectification is handled by a 5AR4/GZ34. Audio level control is High resolution custom made attenuator by ELMA. The circuit topology is extremely simple and signal paths are short.
The CLS-050 has four sets of single-ended inputs and one of them can be switched
to balanced (XLR). Users can select the Pre output of balanced (XLR) or single-ended (RCA). As a bonus, it has a solid-state headphone amp which can drive a single-ended or balanced headphones.

－Specification－
Inputs: INPUT 1-3 Line Level Inputs (RCA), INPUT 4 Line Level Input (RCA, XLR swithed)
Input Impedance: 100kohm (RCA single-ended), 50Kohm (XLR balanced)
Pre Outputs: Balanced (XLR) x 1, Single-ended (RCA) x 2
Headphone Outputs: SE (1/4″ TRS) or BAL (XLR-4P)
Tube Complement: 6V6(MT8B)/6V6GT(T9)/CV511 x2 for Gain, 5AR4/GZ34 x1 for rectification.
Custom Order Option: 6V6G(ST14), 6SN7, 5692, WE310A, WE337A, 5U4/5R4, 274B. Please ask a dealer, if you have a good tube.
Gain: 6dB
Power Reqiremants: (100VAC / 50~60Hz), 110-120VAC / 60Hz, (220-230VAC / 50Hz), (240VAC / 50Hz)
Dimensions: 450mm (W) X 140mm (H) X 310mm (D)
Net Weight: 14Kg