Refer to Krell KSA50 class A power amplifier finished machine. Support balanced input class A, single-ended 35W*2, balance 70W*1

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Special Note: When this machine is used as a single-ended, it is a normal two-channel mode. When it is used in a balanced mode, each machine is one channel. If two channels are required, two local machines are required.
Features:
1. Support single-ended input and balanced signal input
2. Optional A/AB working mode
3. Two gear gain options
Output power: Single-ended input mode: Class A 35W+35W
Maximum undistorted power 110W+110W
Balance mode: Class A 70W, maximum undistorted output power 320W
Size: 480*500*200 (width, depth and height, the panel size is 480*200, and the depth is the depth of the back panel handle)
Weight: 40kg (net weight, about 45-50kg including packaging and wooden frame)
I have been working on the KSA50 for several years, and I have always liked the unrestrained and unreserved sound characteristics of the Krell amplifier. Although its thrust is also very strong, its performance when dealing with the low-sensitivity speakers of Dashi is still a little more than enough. , so I always wanted to make a fully balanced KSA50 power amplifier. When I designed the PLM-1 fully balanced preamp in 2015, I used two KSA50 post-stage boards to amplify the balanced signal output by the PLM-1 respectively during the test machine, and found that the sound was in the power, dynamics, scene and control of the speakers. The performance of the force is much enhanced than that of the single-ended method! When playing large dynamic music, the overwhelming momentum was not felt on the single end before. The balanced working method reduces the loss of signal transmission, the power is enhanced, the speakers can be controlled well, and the music sounds more comfortable. . Similarly, this unit still retains the class A/AB switching function. In view of the phenomenon that the overall gain of the original KSA50