They well may have used a 60w or even higher rated speaker, depending on the voice coil . Your now entering into the "twilight zone" of tweeking mass produced electronic equipment...Make a successfull product, then cheapen the part's to gain profit..as production cost's rise. It happens all to often with most thing we buy an take for granted.
There's quite a few units to try out there , make sure you match the impeadence , and stick to your budget . They may well have used a driver that only cost peanuts to them , bulk purchasing has it's benefits . But you'll be amazed at the audiable difference a better driver..ooops speaker will do to an amp. It will then have your " signiture sound "
Try a hifi speaker very breifly and note the difference...

Hope this helps.

Id kind of guessed there suitability for instrument amps , and yeh agree with you on the sound quality of them. But they dont scare my main system kit built power amps...thats a another story on a different forum . My guitar sounded excellent through the main system, via the effect's box. Only problem with that is , the whole street get's to hear all the duff finger work .... :lmao:

I'll start building an amp when time permitts..maybe after xmas..Buddy at work has an old 50w guitar amp that need's tidying up..new front grill cloth etc...might have most of the hardware required for this build... :tu:

Hi all ,

New to this forum ,but not to diy electronics.
Been thinking about a chip amp based practice amp , as iv'e just started learning to play the guitar at a ripe old age of Thirty....Nine.
Got a couple of left over Lm3875 chips from a previous project, and want to build a decent practice amp...been given a little amp called a Gorillla..but i use the headphone output from the digitech effects pedal that came with the guitar. I find it pleases everyone at present...but it would be nice to build a decent amp...
Going from past chip built hifi amps . Does a chip guitar amp require a bass and treble circuit adding?.got there in the end..sorry to ramble on.