Рет қаралды 11,367
Test the AIYIMA Upgraded 6K4 Tube Pre amplifier.
Purchased from Aliexpress.
First trying the pre amp with the 6K4 valve/tube measuring power used, power output, distortion levels and frequency response. Then swapping out to the GE-5654's and running the tests again.
What I bought..
www.aliexpress...
Comes with GE-5654 valves/tubes..
www.aliexpress...