cooling fan

Lab series L4. The cooling fan is mounted to the case and you have to pull the hardware out to set bias. That being said there is no air flow on the heat sink during the bias setting. I set the bias to specs and it held for 10 minutes like it’s supposed to. Just out of curiosity I put a small...

Just picked up an SWR Studio 220, very happy with the amp so far. Was just contacted by some former band mates, they want to gig again, and that is potentially a very good thing. However: I bought the 220 thinking it would be a nice home practice head, and with the preamp out - add a...

When an outdoor gig is coming up I often dust off the lead sled and practice with it at low volume. To help refamiliarize myself with the amp. This may seem pointless but it does help and I like to check the amp after periods of not being used. The thing is for low level practice I switch of the...