If anyone has a Denon POA-1500 power amp and is having problems with there VU meter lights. There is a mod available. The amp had a known factory/design defect. Denon released a warranty kit consisting of a complete set of bulbs, two transistors and two resistors plus installation instructions. Unless you install the changed components, the bulbs will continue to burn out. So don't waste your time with the bulbs unless you fix the defect. If you contact Heff in the Klipsch community He can help you with this. I ordered my parts from him and my POA-1500 VU meters work now. Thanx Heff.