Pure Mojo - 1947 Masco tube PA dialed in for guitar use

Riffraff12571

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This is my strangest amp but also one of my favorites, a 1947 Masco MA25P converted tube PA.

I picked it up in all original condition from a local seller. He was an older guy who collected & restored antique radios. He picked this up at a swap meet somewhere and planned to work on it but just never got to it and was thinning the herd as we say. My timing was good that day and I ended up getting it $50.

Since I got such a great deal on it I decided to send it to vintage amp guru Skip Simmons in California to work his magic on it instead of doing the conversion myself. What came back was mind blowing.

I have a lot tube amps and love them all but this one is in a league of it's own.

Here's a sample of it's tone with 3 different guitars plugged straight in, no dirt pedals or boosts.

There are a few pics under the hood in this as well for you dudes that like amp porn.

 

Cali Dude

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Skip is the best. Great guy, and so talented with vintage tube amps. I used to have one of his Bogen conversions. Congrats! Very nice.
 

Riffraff12571

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What speakers are in your cab?
I've got ET65's in that cab and they sound great but I didn't use them in that recording.

I ran the amp into the Weber MASS100 set to fill attenuation and ran it's line out to my interface then used cab IR's in Two-Notes Torpedo Wall of Sound so I wasn't blasting my wife out of bed at 5 a.m. :lol:

The cabs IR's were a Greenback 412 and a V30 412 with SM57 mics. I use that a lot because I record between 4 & 6 a.m. in the morning and need to keep it quiet. It's the only time of day I have to myself.

My favorite actual cab is an old Peavey 412MS loaded with those ET65's up top and V30's on the bottom. That combination really works great together.
 
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Sea Devil

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Man, that sounds fantastic! I'm hearing some nice reverb on both the guitar and the drums, and a hint of delay on the guitar as well. I assume those are separate plug-ins and not the cab and mic sims. Very tasteful. The guitar sounds like something in-between Roy Buchanan and David Gilmour!
 

Riffraff12571

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Man, that sounds fantastic! I'm hearing some nice reverb on both the guitar and the drums, and a hint of delay on the guitar as well. I assume those are separate plug-ins and not the cab and mic sims. Very tasteful. The guitar sounds like something in-between Roy Buchanan and David Gilmour!
I'm not sure what Peter used for reverb on his drum track. He is in England so I've never seen what he is recording with. I do a lot of collaborative stuff on Wikiloops with the other members there and players rarely talk about the rigs they are using. It's all about the jams there. I used some tracks from one of the jams I did there as a backer for this.

The guitar reverb is from the Two-Notes cab IR's. It has a few different subtle room settings that really help the IR's sound more natural. I use them when I'm not using another plug-in for that. The delay is a plug-in, Valhalla Supermassive. It's a free download that has fantastic delay and reverb settings with a bunch of adjustable parameters and the ability to save your patches as presets. I use all the time for really drippy wet stuff on down to just a touch like in this and highly recommend it. Valhalla also has a modulation plug-in that's a free download with some really wild presets. That also has adjustable parameters and the ability to save your own presets. I don't use that one often but I have used the chorus, flange and detune in it on a few tunes. I also used a few of it's over the top presets for crazy intro on a Sci-Fi themed musical video. It was awesome for that.
 




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