fan noise

Just got an used MarkBass combo for my double Bass. Markacoustic AC121. As soon has I power the amp, the Fan goes Ping Pong between slow fan speed and High noisy speed! I let the amp roll for a long time, now the the problem is somehow tame. The fan doesn't fluctuate as much... pretty much stay...

Hi guys, I recently bought the Aguilar Tone Hammer 500 v2 and while I absolutely love its sound, I a bit concerned about the amount of noise I get from the fan. I read that it's normal that the fan starts itself after some time, however mine does from the moment I power up the amp and it takes...

I love the sound of this amp and it absolutely KILLS, but the fan noise is so loud that it might be a deal breaker for me. I can't understand how they could allow such loud fans on these amps. I reached out to Aguilar just in case this is an anomaly (I don't think it is unfortunately) so we...

Hi, So I just picked up this DB750 and it sounds great. The fan noise (IMHO) is another story. I can see this being no big deal when playing live with a band - and indeed that seems to be the consensus on here. Unfortunately, I'm usually playing in the living room semi-quietly these days...

Hi all how are ye doing? I very recently picked up an Ashdown RM-500 EVO I. Bought it brand new from Kytary.ie Guess it was on their shelves for a while as Ashdown haven't sold the EVO I for a while. Plugged it in for the first time yesterday and am a bit surprised by the fan noise. Now I...

Hello all -- I picked up an Ampeg svt 3 that was barely producing sound and followed @ejschultz fantastic instructions for biasing the amp in this thread; Mine was reading less than 1mv and I successfully biased it up to spec around 25mv. Amp sounds great but there is an issue with the tube...

cooling fan inside SWR working pro 400 head has been very,REALLy really loud, and I've been wondering if it needs to be replaced any info/help would be appreciated thank you