Peavey MiniMega Bass Amplifier: Effects Loop to XLR DI Issue скачать в хорошем качестве

Peavey MiniMega Bass Amplifier: Effects Loop to XLR DI Issue

#peavey #peaveyamps #amplifierrepair Hey everyone! I made this video for those that may run into this issue. This is my main gigging amplifier and I wanted to have this functionality. At the time of recording this video, I brought this issue to the attention of my engineer friend down at Peavey, and he is updating the schematic for future production runs of this amplifier so that this issue is not experienced. If you have this amplifier and are dealing with this problem the modification is about 45 minutes of bench time. I honestly don't think many people are going to watch this video because it's just an obscure thing that I don't think a lot of people use as far as this feature goes. However if you are a user of the 4CM, aka the four cable method when routing your bass effects in front of the amp and in the effects loop this issue will come up when you are connected to the FOH of a venue. ***I did not make mention in the video but there was also an update to the DI circuit around 2018 to correct a noise floor problem. In short, the load resistors at the op amp output or change from 47.5 k to 2.67 k adding more load to stabilize the op amp. There is also a metal plate installed in between the patch board and the power amp board to shield the patch board from radiated emissions coming from the switch mode transformer bleeding into the audio lines. This shield was done very early on before 2018. ****On the bleed resistors after the coupling capacitor there are 47.5 k resistors, while these are adequate, there is still a bit of thermal noise in the circuit. To correct this I installed 680 ohm resistors in place of the 47.5 k bleed resistors after the coupling capacitor and this completely fixed the DI noise floor. If you have any questions on this fix modification please let me know!