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my '79 JMP 2203 project my '79 JMP 2203 project
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Unread 03-02-2012, 10:26 PM   #151 (permalink)
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Re: my '79 JMP 2203 project
Have you tried both Jensens in your 2x12?
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Unread 03-02-2012, 11:34 PM   #152 (permalink)
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Re: my '79 JMP 2203 project
Not the new jensens no... I thought about it though...
the tonker is 150 watt 16 ohm and the jet city was 70 watt 16 ohm...

the one 16 ohm jensen I have is also 70 watt, so I figured maybe they would match better
and sound better together... but they dont really...

Tonker sounds better, but not totally convinced that the jet city is toast...

the 4 new jensens are 8 ohm 25 watt, so I would have to wire them in series and have 50watt 2 x 12.
I'm sure It would be ok, but dont want to mess them up before I get them in the 4 x 12.... (which will be a while based on my progress so far)
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Unread 03-02-2012, 11:37 PM   #153 (permalink)
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Re: my '79 JMP 2203 project
Can you hear it ha ha... started rounding the top front, coming along pretty well...
going to take a while....



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Unread 03-03-2012, 02:41 AM   #154 (permalink)
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Re: my '79 JMP 2203 project
Sits on there just right.
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78' 2203 JMP/OR15/GR TMB on a full stack of GB's=Rock Nirvanah
Martimus Maximus Tonepacks in my amps. TOOBS!

GR amplifiers. I've been thumped!

Joey's bring'n sexy back!

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Originally Posted by Rockin_Lisa View Post

Where the hell is dirty ole Joe at?
Its "Boo-tique" fellas cause that price scares the tone out of my fingers...
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Unread 03-03-2012, 06:26 PM   #155 (permalink)
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Re: my '79 JMP 2203 project
allot of damn work...




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Unread 03-03-2012, 11:18 PM   #156 (permalink)
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Re: my '79 JMP 2203 project
sounding better with 2 braces and the back closed up... think it's as good as I can get with those 2 speakers... bracing does seem to make a noticeable difference... maybe because its 1/2" ply....
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Unread 03-04-2012, 06:29 PM   #157 (permalink)
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Re: my '79 JMP 2203 project
damn is this thing allot of work! starting to take shape now...
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Unread 03-04-2012, 06:37 PM   #158 (permalink)
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Re: my '79 JMP 2203 project
Looking good!
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Unread 03-04-2012, 10:37 PM   #159 (permalink)
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Re: my '79 JMP 2203 project
Yes indeed.
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__________________
78' 2203 JMP/OR15/GR TMB on a full stack of GB's=Rock Nirvanah
Martimus Maximus Tonepacks in my amps. TOOBS!

GR amplifiers. I've been thumped!

Joey's bring'n sexy back!

Quote:
Originally Posted by Rockin_Lisa View Post

Where the hell is dirty ole Joe at?
Its "Boo-tique" fellas cause that price scares the tone out of my fingers...
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Unread 03-05-2012, 05:55 AM   #160 (permalink)
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Re: my '79 JMP 2203 project
Really nice work man, I have been watching your progress so far! Two Questions:

1) Is the speaker mounting piece of wood supposed to be in two pieces?
2) Is this an all-glue construction or are you going to use screws? The speakers weigh a bit.

I have no idea about cabinet construction, so I'm just asking, not criticizing.
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Unread 03-05-2012, 07:04 AM   #161 (permalink)
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Re: my '79 JMP 2203 project
thanks, well I'm far from an expert but from my research it's 2 pieces of wood, almost has to be given the angle. There is a strip that goes across the back that holds the 2 pieces together (i'm still working on it see below). It will also have 1/2" strips across the front, framing the 2 pieces (my next step). the grill goes over the strips and floats above the baffle. I'm using screws and titebond II glue for all the braces. the rabbet joints between the top, bottom and sides are pl/premium glue only. I know a rabbet joint is not the strongest, but I'm not really setup to do finger joints. I did some testing and the wood rips apart before the glue joint does (both with pl/premium and titebond II in my tests). I may add a few extra braces from the inside if I can. they would have to be located so that I can get baffle in through the back... we'll see, I think it will be plenty strong. the 2 x 12 I did is all titebond II glue, no screws and it has held up well...
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Unread 03-05-2012, 10:01 AM   #162 (permalink)
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Re: my '79 JMP 2203 project
Really nice man, it should be alright. Can't wait to see this thing finished. Take your time though, make it right!
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Unread 03-05-2012, 10:18 AM   #163 (permalink)
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Re: my '79 JMP 2203 project
thanks! yeah, I'm going to take a break for a few days so I don't sloppy ...
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Unread 03-06-2012, 08:35 PM   #164 (permalink)
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Re: my '79 JMP 2203 project
So much for taking a break... finished the back brace yesterday...
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Unread 03-06-2012, 08:37 PM   #165 (permalink)
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Re: my '79 JMP 2203 project
finished the front brace today after work, screwed and glued with pl premium.


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Unread 03-07-2012, 09:19 PM   #166 (permalink)
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Re: my '79 JMP 2203 project
Got the top and bottom of the frame done, last 4 pieces cut and ready...
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Unread 03-08-2012, 09:56 PM   #167 (permalink)
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Re: my '79 JMP 2203 project


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Unread 03-09-2012, 12:33 AM   #168 (permalink)
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Re: my '79 JMP 2203 project
Where do the last 4 pieces go, smashed?
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Unread 03-09-2012, 06:32 AM   #169 (permalink)
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Re: my '79 JMP 2203 project
they were the last 4 pieces of the outside baffle frame (left and right sides), here is a pic before I painted it.
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Unread 03-09-2012, 06:53 AM   #170 (permalink)
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Re: my '79 JMP 2203 project
Oh right, they weren't easy to spot in the previous picture.

You're getting close aren't you?
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Unread 03-09-2012, 07:39 AM   #171 (permalink)
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Re: my '79 JMP 2203 project
yeah, cant really see them in the painted pic. close to having the construction done, just have the name plate, back and the frame to hold the back.... day job kicking my ass and I have a few 7 day weeks coming up so will be slow going... sold my Ibanez artist so I have the bucks to buy the tolex and grill material....
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Unread 03-13-2012, 08:37 PM   #172 (permalink)
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Re: my '79 JMP 2203 project
The 2 x 12 as braced in the pic (with the back put on), no effects just marshall MV around 2 and gain 7 or so.... (sorry for the playing i went where the guitar took me...)

cab sounds better huh?

Marshall JMP 2203 after repairs and after bracing 2x12 cab - YouTube
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Unread 03-15-2012, 06:56 PM   #173 (permalink)
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Re: my '79 JMP 2203 project
Got the back cut and the board for the "smashed" logo....
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Unread 03-15-2012, 07:03 PM   #174 (permalink)
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Re: my '79 JMP 2203 project
Still watch'n!LOL

Looking good.
__________________
78' 2203 JMP/OR15/GR TMB on a full stack of GB's=Rock Nirvanah
Martimus Maximus Tonepacks in my amps. TOOBS!

GR amplifiers. I've been thumped!

Joey's bring'n sexy back!

Quote:
Originally Posted by Rockin_Lisa View Post

Where the hell is dirty ole Joe at?
Its "Boo-tique" fellas cause that price scares the tone out of my fingers...
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Unread 03-15-2012, 07:38 PM   #175 (permalink)
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Re: my '79 JMP 2203 project
thanks... some day it's going to sound great lol

very bad 212 w/tube screamer...
http://www.youtube.com/watch?v=uc8ZX...ature=youtu.be
Last edited by smashedguitars; 03-15-2012 at 09:34 PM.
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Unread 03-16-2012, 06:22 PM   #176 (permalink)
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Re: my '79 JMP 2203 project
Cabinet is looking great! Can't wait to hear it with the new speakers in it!
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Unread 03-16-2012, 06:36 PM   #177 (permalink)
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Re: my '79 JMP 2203 project
thanks, plan to do some more work on it this weekend... still have allot to do on it but I can see the light at the end of the tunnel
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Unread 03-19-2012, 07:28 PM   #178 (permalink)
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Re: my '79 JMP 2203 project
...slow and steady... more slow than steady...
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Unread 03-20-2012, 08:06 PM   #179 (permalink)
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Re: my '79 JMP 2203 project






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Unread 03-21-2012, 08:35 PM   #180 (permalink)
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