Matched PAIR of VTG Sound Valves M40 Mono Tube Power Amplifiers Dynaco MK IV
Saturday, March 21st, 2026
PAIR of VTG Sound Valves M40 Mono Tube Power Amplifiers – Dynaco MK IV. The amplifiers are in near mint condition! There are some very minor imperfections. Both amps power up as they should and they work great. The tubes come with the amps. Note this is a matched set w/ consecutive serial numbers! Please be sure to check out my other listings as I will have many other vintage audio and radio-related items up for sale.