Captain Bob’s Electronic Emporium is NOT an authorized distributor or dealer for parts or services of Mesa Boogie and our products have NOT been endorsed or certified by the amplifier manufacturer. While many customers have had excellent results using our Premium Tube Sets and other products, use of the products sold in this auction may void or modify your amplifier manufacturer’s warranty. We provide sets of tubes from various tube manufacturers (other than Mesa Boogie, the amplifier manufacturer) that will work in amps described in this auction. If you need genuine parts or tubes from Mesa Boogie, check for authorized dealers and distributors via the amplifier manufacturer’s website.