I play harp through a 1948 Masco ME27. I have a Palomino (Crate) extension cabinet and replaced the two 80W Celestions with the 12" speakers (Jensens?) that came with the Masco PA in 1948. I'm playing 50's-60's Chicago blues, so it's the right vintage, and people love the tone. Just the needed power to cut through guitars at a jam session. I "adopted" the PA and speakers from a lodge hall where it was forgotten in a storage closet, replaced by a shiny, new Radio Shack PA. Glad I took the time to clean out the closet for them - they were glad to also have me "haul away" an Elvis style mic, a 30 watt, 1950's Challenger amp and an Astatic JT30 mic. A week in the shop, and Skip Simmons of Skip Simmons Tube Amp Service handed me a brand new, 60-year old amp!
 

Good to hear Kevin. They are great amps. I use them for acoustic and electric guitar mostly and have now 3 Mascos. I just emailed Keith on the site with pix of this brand new, out of the box ME-18P. I'm trading for it with the owner of the oldest electronics shop in Denver and although I thought the turntable on top was funky, it's actually pretty cool primarily since this thing was delivered to their store from Masco on Nov. 1, 1957 and had never been out of the box. I just soldered in a 1/4" connector for the speaker out so I could test it and it was beautiful with my Seagull acoustic. It's 18watts and there was more volume available than I could do in my music room. I'm anxious to try it out with one of my 4x12 Marshall cabs and my PRS. Thanks for the post. If you want to see an orig, new M-18P, jump back to harpamps in a day or so and it should be there. take it easy and jam on bro! jerry
 

P.S. to last Kevin, I think mine has been retrofitted with that toggle switch for off/on. Possibly that part of the orig. switch went out. That switch is still in the amp however and is operational as I recall. Have fun, jerry