Masco MA-25P Speaker jacks

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ampdan
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Joined: Tue Feb 06, 2007 5:14 pm
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Masco MA-25P Speaker jacks

Post by ampdan »

This is a recent find, way before my time. I would like to keep the stock appearance if possible. It came with the speaker cabinets also, but the plugs are cut off (original wire is standard zip cord). I have a source for the 6 pin plugs, I have no idea how to wire them up. Here are some pictures. Any help would be greatly appreciated.

[IMG:640:480]http://i1.tinypic.com/8c3ipza.jpg[/img]

[IMG:640:480]http://i19.tinypic.com/80ob5ma.jpg[/img]
Johnhenry
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Re: Masco MA-25P Speaker jacks

Post by Johnhenry »

The wire between the outlet plug select's what ohmage the speaker will be played on, look on the backside of the speaker plug, that will be the hot, speaker out, the other is ground to the speaker, if your speaker's are not marked + & - you can do a battery test to find which wire is + on the speaker for proper phase.
looking at your pic, there are 2 bare wire's that jumper from plug to plug, the top wire is + out, the bottom wire is for the common, the other wire's are part of the Neg. feedback circuit,
Johnhenry
ampdan
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Location: SE Wisconsin

Re: Masco MA-25P Speaker jacks

Post by ampdan »

Thanks Johnhenry. That was my first impression. So I can wire the 6 pin plug with just 2 wires and ignore the rest? I guess I will have to mark the plug and socket so they are plugged in the right way.
Dan
Johnhenry
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Re: Masco MA-25P Speaker jacks

Post by Johnhenry »

if I remember correctly the pin's are offset to where it will only plug in one way.
yes on only the 2 wire's should get you in bizz, but, you need to know what ohmage your speaker's are, if they are both 8 ohm's you would leave the wire on the terminal strip on 4 ohm's, but you can test then decide what ohmage you need,
John
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Noel Grassy
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Re: Masco MA-25P Speaker jacks

Post by Noel Grassy »

By the way ampdan, what are we looking at? Is this an old Hi-Fi set up or something from the theatres? I'm just a curious foo' when it comes to the Flintstonian tube gear that paved the foundation for what we aspire to make our own. All the best, NG 8)
All excellent things are as difficult as they are rare__B Spinoza
ampdan
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Location: SE Wisconsin

Re: Masco MA-25P Speaker jacks

Post by ampdan »

Noel Grassy wrote:By the way ampdan, what are we looking at? Is this an old Hi-Fi set up or something from the theatres? I'm just a curious foo' when it comes to the Flintstonian tube gear that paved the foundation for what we aspire to make our own. All the best, NG 8)
Hey NG, It is actually a PA system. Rumor has it "Little Walter" used one of these for "Harp" it has 7B4,7N7,6L6GA,5U4G tubes. This thing is built like a tank!
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sportster4eva
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Re: Masco MA-25P Speaker jacks

Post by sportster4eva »

Old Masco stuff is sweet! I have stumbled across a website somewhere that shows Little Walter with a Masco (ME-27 I think) next to him. I have a couple stashed away to convert to harp or guitar amps one of these days.
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