KT88 Push-Pull Stereo Power Amplifier

KT88 Stereo Power Amplifier, handmade in our workshop.
Circuit configuration: SRPP circuit using ECC803 for the first stage, Mullard-type ECC82 for the phase inverter stage.
Output: KT88PP fixed bias, operating at 60mA plate current.
UL connection and NFB applied to the cathode of the output tubes via dedicated NFB windings on the secondary of the output transformer (NFB amount: 5dB).
NFB from the secondary of the output transformer to the first stage is 10dB, for a total NFB of 15dB.
Enjoy powerful, damped low frequencies, clear and delicate mid-high frequencies with excellent resolution, and the comfortable, fatigue-free sound characteristic of vacuum tubes, even during long listening sessions.
All parts used are brand new.
Chassis is handmade aluminum with dimensions (W) 455mm x (D) 255mm x (H) 65mm. Top plate thickness is 4mm, front panel, rear panel, and side panels are 3mm thick, and the bottom plate is 2mm thick.
Transformers are original, designed and manufactured in our workshop for KT88PP.
The power transformer and smoothing choke coil feature large cores for a stable design with ample power supply capacity. High-quality film capacitors are used for smoothing.
The output transformer uses high-quality orient core and a unique push-pull winding structure with split multi-layer winding, achieving stable frequency characteristics from low to mid-high frequencies for a high-performance finish.
Includes power cord, circuit diagram, and frequency measurement chart.

Dimensions: (W) 455mm x (D) 300mm (including knobs and terminals) x (H) 205mm
Weight: 23.5Kg
Output Impedance: 6Ω, 8Ω (2 systems)
Output: 25W x 2 (50W)
Damping Factor: 6.0 (on/off method)
Residual Noise: 0.4mV
Frequency Response (8Ω load, 1V): 10Hz - 50KHz -1.5dB

Shipping method will be Sagawa Express or Kuroneko Yamato Takkyubin.
For the first 6 months after product receipt, we will repair any failures during normal use free of charge, with shipping costs covered.
For failures within the following 2 years, repairs and adjustments will be made with the buyer covering parts and shipping costs.
Please note that damage from impact or drops, or any modifications or repairs to the internal components of the unit will void the warranty.
Subsequent maintenance will be provided on a paid basis for repairs and adjustments.
No claims or returns, please.