Amp Head for DIY-Head

[Track Rat]

I was trying to use the original stock speakers that were in the record player (two 6" and one 3" all wired in series = 12 ohms) and was getting a kind of motor boating sound on decaying notes. I tried it into a Celestion 10" 8 ohm and that problem went AWAY.

 

[Dr ZEE]

... motor boating sound on decaying notes..

I've employed my entire remaining stack of imagination and failed trying to virtually creat it in my mind.
The good thing is that (what ever it sounded like (which you didn't like)) you have found the way to get rid of
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rant about speaker experimenting:
The "concept" here is: amp and speaker is ONE (the system) (not two separate parts with no relationship during the operation). So various speakers means various "guitar amps", or say - various instruments to play. The "problem" here is - practicality. By that I mean: when experimenting (looking for a sound) you need to be able to switch and compare while playing in a convenient way (similar the way you'd switch pickups on the guitar). This brought me to the point of building guitar speaker cabs with few different speakers in it and switchable combination of active speakers. Having a stack of various cabs with a speaker switch center would be another way. I'm thinking about this. Maybe building some custom guitar "floor-control block". It's time to make something like that.