Amp upgrade to fill some time

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The Yamaha GA-10 amp that will be going to my niece along with the Japanese Sorrento starter guitar is getting a speaker upgrade today. The original speaker is listed as 12cm or 4.75inch, but that counts the metal speaker frame. It is actually 4.5inch of speaker. It will be replaced by a Jensen Mod 6-15 which is listed at 6inch with actual speaker width of 5.75inch. The pic makes the difference in size look huge. In order to fit the Jensen I needed to carve out a channel in the bottom of the cabinet so it would clear the amp cage. I used a Dremel with a small rotary cutter for that. Hacked out a bigger hole in the speaker mount plate with a scroll saw. Going to recover that plate with a Fender style mesh.

The parts on the left of the wood skewer are from my Crate VC-508 combo tube amp. I have a bunch of capacitors and resistors coming to upgrade it. I had bought a 4 ohm Celestion Eight-15 to upgrade the other Yamaha amp and tried it in the Crate. Oh, myyyyy. Sounded so much better that I ordered a 8 ohm version of the same speaker for the Crate.

Still trying to decide which guitar to start working on next. Either the Memphis P-bass copy or the Yamaha Strat are the choices for now.
 

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Well, the 6inch Jensen speaker shoehorned into this tiny amplifier just fine after I carved that channel in the bottom. Ended up with a 1/8th inch clearance on either side of the braces that mount the speaker face and also under the amp chassis. I knew it would make a difference in the sound but my goodness. It is a totally different amp now. Got some low end and the clarity is MUCH better. It matches up well with the Sorrento I put a P90 pickup in. I am using this as my test amp until I get done rebuilding my Crate VC-508 tube amp.
 

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