plexi 67 VS Jtm 45/100

marci84 · Post by **marci84** » Thu Jul 03, 2008 7:28 am

btw to get more into "confusing": i was watching the live at Paris from 1980 with Bon and i see that near Malcom there are 3 Marshall heads with red/black plastic power/standby switches..so i think that they are post '75-'76 right? and if they are superleads they have the split cathod and all the features of the metal panels i suppose..but if they are superbass than it's another story.
Also an a live from 1977 they have some marshall with the red/black switches on stage..

So which amp can reproduce that "fuzzy" sound of Angus in whole lotta rosie? then i will not buy it!! ahha!

Roe · Post by **Roe** » Thu Jul 03, 2008 7:56 am

by all accounts, the live amps in that period were standard master volume amps. I don't find this confusing at all

marci84 · Post by **marci84** » Thu Jul 03, 2008 8:00 am

Roe wrote:by all accounts, the live amps in that period were standard master volume amps. I don't find this confusing at all

ok thank you!

So it seems that i will end with a 67 plexi..

wdelaney72 · Post by **wdelaney72** » Thu Jul 03, 2008 1:00 pm

They'll both get you there and are great amps. I have a JTM 45/100 build and it works beautifully.

mrkrausman · Post by **mrkrausman** » Fri Jul 04, 2008 11:50 pm

Marci I'm in the same dilema...don't know which one to build. The 45/100 or the 67. I have the same tastes you have but which one gets us there? Right now I'm leaning toward the 67 but that could change tomorrow. My only experience is my 68 50 watt lead spec. I wish I could A/B both side by side but that is a luxury I won't have unless I build both. Let us know what you end up with.

marci84 · Post by **marci84** » Sat Jul 05, 2008 3:56 am

At the moment i'm deciding if it's cheaper to buy a Marshall 1959 reissue used (there is one on ebay pretty cheap) and install a new board plexi 67 style, new choke and OT and maybe new filter caps, or to buy a kit to build a 67 plexi (but i still haven't understand which kit i have to buy to build it and if it will include everything)

marci84 · Post by **marci84** » Sat Jul 05, 2008 12:06 pm

To build a 67 plexi replica which kit i should choose?

Roe · Post by **Roe** » Sat Jul 05, 2008 12:15 pm

the 67 is quite a bit louder than the 45/100. a 45/100 can be manageable in a band context but the later 100watters often get to loud if you want the amp to distort

marci84 · Post by **marci84** » Sat Jul 05, 2008 12:25 pm

i have a hotplate and i wanna also try a master vol post PI..

is this the kit to build a 67 plexi? http://store.metroamp.com/product_info. ... ucts_id=59

does it incluse also the filter caps of the right values?

Roe · Post by **Roe** » Sat Jul 05, 2008 2:33 pm

that's the 69 kit. there isn't a 67 yet

marci84 · Post by **marci84** » Sat Jul 05, 2008 3:02 pm

Roe wrote:that's the 69 kit. there isn't a 67 yet

doh!!
i wanna try to build a superbass more than a superlead (also if they are pretty simple to switch between)..so if i wanna a 67 what should i buy?

and i live in italy so it will be easier for me to have the european AC socket for the chassis not the hole for the AC straight-in cable

Roe · Post by **Roe** » Sat Jul 05, 2008 4:35 pm

the 69 superbass has the same circuit as the 67 but the filtering is higher and the ot is different. also, the chassis is different

Flames1950 · Post by **Flames1950** » Sat Jul 05, 2008 5:08 pm

Look at the barebones '67/'68 chassis kit, and there's an option in the drop-down menus in the description to choose a complete kit. But there are no step-by-step instructions for the '67/'68 kit.

bluze81 · Post by **bluze81** » Sat Jul 05, 2008 6:34 pm

The 67/68 amps are great iconic rock amps but the JTM45/100 KT66 amp design has something great going on with that tone, I love the one I built this year and as someone posted the volume on the 45/100 is managable with no attenuator. you cant go wrong with any of these builds for certain.

marci84 · Post by **marci84** » Sun Jul 06, 2008 4:38 am

i think that i'll go for a marshall reissue and modify it with new OT and choke, new ptp board, and maybe i will try first the 69 circuit superbass..i found a pretty cheap 1959RI on ebay