Jtm45 vs 50watt kit

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Mpollard
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Jtm45 vs 50watt kit

Post by Mpollard » Sat Aug 18, 2018 3:21 pm

I’m in the process of purchasing one of the valvestorm kits and I’ve been reading through this forum and others trying make sure I purchase the right kit for my needs and tonal desires. I’ve been really focused on the JTM45, but then reading about and hearing sound clips of 50w. So, I have a couple of questions that I hope will help me make a choice between the two:

1) is the 50w equivalent to the 1987x modal?
2) while I rehearse and gig at close to full volume, it would be nice to have a master volume so that my wife doesn’t shoot me when I’m playing at home. I’ve read in several places that the JTM45 doesn’t play well with the mv, and several other places that say the 50w does. Any advice or opinions are greatly appreciated.
3) My gig venues are fairly small, so I use a 1x12 currently loaded with a v30, and soon to be loaded with g12m 65 creamback. Both are rated at 65w. Will I run out of safe operating room on this cab if I go with the 50w kit? I’m willing to leap into 2x12 territory, but again, I’m really limited on stage space and volume levels, and the 50w might be pushing it cranked with a 2x12.
4) how does the metro effects loop play with either kit?

Based on what I’ve heard for sound clips, I think I’d be happy with either kit, although I like the idea of having a bit more clean headroom with the 50w kit. I play my guitar volume knob almost exclusively to get my cleans.

FYI, my band plays two complete sets of Hendrix, and a third mix of Zeppelin, Trower, etc. I’m playing through a strat most of the time and then switch to a LP when I need to. My current amp is an Orange OR15, and I love that little guy, but for any kind of cleans it’s really hard to get to stage volume without getting unacceptable breakup. The mv is basically dimed in gigs to get to acceptable stage volume.

Thanks in advance for any advice.

danman
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Re: Jtm45 vs 50watt kit

Post by danman » Sat Aug 18, 2018 6:26 pm

A 50 watt kit with Valvestorm would be the 1987 circuit because I do not believe they offer the master volume (2204) circuit chassis. They do carry the items for the 100 watt MV amp though. WIth the 50 watt kit you could do a 1987 circuit (lead), 1986 circuit (bass) or a mix of the two. The circuits are very similar and only require a few different components. The bass circuit would be closer to the JTM 45 though.

Both the 1987 and 1986 circuits will be very loud amps and will need to be cranked to get good overdrive sounds. A ppmiv can be added to tame volume and allow some overdriven tone at lower volumes but it does has it's affect on the sound. Some love it and others do not. Another option is to use an attenuator or a mix of attenuator and ppmiv to bring the volume down. You may be better off building a 2204 style circuit if a MV and lower volume od tones are necessary. The 1987 will be a tighter more aggressive amp than the JTM 45 but the 45 can also get some great tones once the volume is brought up enough. All of the nmv circuits are very similar with just a few different components between them but the JTM 45 does use tube rectification which will have it's own effect in sound and feel versus the diode rectification in the other circuits.

harleytech
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Re: Jtm45 vs 50watt kit

Post by harleytech » Sun Aug 19, 2018 8:39 am

Build them both... That's what I did...
:thumbsup:

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neikeel
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Re: Jtm45 vs 50watt kit

Post by neikeel » Sun Aug 19, 2018 5:30 pm

viewtopic.php?t=39034

Do it from the outset, it will make sense when you plug it in.

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Rickey_Dee
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Re: Jtm45 vs 50watt kit

Post by Rickey_Dee » Mon Nov 05, 2018 5:33 am

I'm a lil late on this, havent been here for a couple years.

I've built the 50 watt kit, 1987 69 lead spec. The amp is loud without a master, no doubt. I've installed the LarMar PPIMV, which works great. What i also did, i got EL84 adapters from Tube Amp Doctor (TAD), and it is significatly lower in volume, while retaining the basic character of the amp. I use this combination when i play small venues, on bigger stages just the ppimv. This really works great, if you plan to build a 1987, i suggest to try this, i think you wont be disappointed.

Cheers
Rickey
Builds:

Metroamp 50W Lead Plexi
BYOC Tri-Boost

tbc...

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neikeel
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Re: Jtm45 vs 50watt kit

Post by neikeel » Tue Nov 06, 2018 4:20 pm

I tried the similar adaptors from THD using JJ EL84s

I found the sound relatively compressed with less dynamics, same with the Larmar turned down below half

Generally I use KT66s or EL34s and a good attenuator.
Neil

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