Here is a custom 500 series Preamp module. Hairball 500 series mic pre platform with Yamaha PM2000 components and Jensen output transformer. Sounds awesome, killer mic pre. 

These are brand new, built to order. I'm also making Trident 80 series microphone preamps in 500 series modules. 

Please contact me directly if you have any issues with your purchase and I will do my best to help resolve them. 

   Feel free to ask me any questions