trinityamps.com

what the differance in tone, i love my 18 plexi by far the best sounding 18 ive built was thinking about the next build trying s111 i havent side by side viewed the amps layouts. altought the 18 plexi is somewhat dark i love it and it gets the most playing time its got a great chruch its very inspiring, with great controlled feedback overtones, just looking for some input thanks mark

The sIII is a little cleaner and not quite as agresive. Subtle. You want chnage - go to the TMB or cascade the Normal into the TMB channel.

The sIII is a medium gain amp and is voiced to do the early plexi/JTM45 sound very nicely. The range of tone is from spanky clean to Marshall grind. You can get a great Clapton Bluesbreaker sound and Hendrix as well. This amp can handle Blues-Rock, Country & Reggae. The Second channel (Normal Channel) is same configuration as the Tremolo channel from the original 18 watt design but without Tremolo.

The Plexi is voiced to sound period correct for a Marshall Plexi Lead. Screaming guitar lead tones at a much lower volume. The amp can thump and grind with less compressed tone than the other 18 watt variants. The Second Channel (Normal Channel) provides way more overdrive than most 18 watt normal channels while the Plexi channel is capable of the best clean sound we have ever heard come out of an 18 watter. With a pair of greenbacks, you'll be shocked how period correct it sounds. Crank up the gain and you are in crunch tone heaven. The clean boost just adds another dimension, it nails all those old AC-DC tones dead on and has way more gain on tap if needed.

The TMB amp is a high gain amp that does the 80s sound very nicely. It is intended for musicians who want plenty of grind. It does ZZTop very nicely. It is both responsive and aggressive. The second channel is the Normal channel from the original 18 watt design. This amp does classic rock crunch to metal.

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

thank you, thats a perfect descrition i do like the boost its a very nice touch its my fav 18 watt desigh by far do you sell faceplates for this amp? id be interested, i built this amp using some old transformer i had laying around, and cheap caps but am planning a new build with better iron and sozos faceplates, like i said im addicted to this amp since i built it ive played that amp way more than the other and i really dig it mark

Mark are you talking about a Trinity Plexi or a Richard Johnson (rjgtr) 18W Plexi? Those are two quite different amps.

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Great tones come in small glass jars!

Im talking about the trinity 18 watt plexi, its my current fav, ive done rj also and enjoyed it also, but the trinity really shinned for me, i used the musicalpowers output and a old old pt and the thing just rips im gonna do anouther using 18 watt iron and sozos or mustards with faceplates and put it in a cab any idea where to score faceplates trinity doesnt list them? mark

Just ping Stephen @ Trinity for faceplates. Although they're not on the price list, he might have a spare set around he could sell you.

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Great tones come in small glass jars!

I also learned quite a few interesting things after the above discussion. Good topic.
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I have test Post PI MV but it did not work too good but possibly I should have tried to tune feedback circuit? Anyhow I decided to skip PPIMV before I study it more whicn there are many in internet..

The main difference in tone between the two amps could be related to slither io their circuit design, components used, and even the speaker. The 18 Plexi is known for its classic rock tone, with a slight midrange boost and a bright high-end. On the other hand, the S111 may have a more modern tone, with a flatter frequency response and a tighter low-end.

My experience with testing Post PI MV has not been encouraging; perhaps I should have experimented with adjusting the feedback circuit. Despite the abundance of resources on the internet, I've decided to forego PPIMV. geometry dash

The speaker expresses their affection for the 18 Plexi guitar amplifier, which they personally built and consider the best among their creations. They admire its warm and rich vintage Marshall tone, describing it as somewhat dark but full of inspiration. The amp delivers excellent church (crunch) and controlled feedback overtones, enhancing the overall playing experience. Check it here https://www.emulatorpc.com/fate-grand-order-english/.

While content with the 18 Plexi's sound, they remain curious about the S111 amp and its potential differences in tone and layout. Seeking input from others, they contemplate the idea of exploring new possibilities with the S111 for their next build. The message showcases a passion for guitar amplifiers and the pursuit of discovering diverse and inspiring tones.


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The speaker shows how much they love the 18 Plexi guitar amplifier, which they personally created and think is the best thing they have ever made. They praise its deep, warm, classic Marshall tone, calling it "somewhat dark but bursting with inspiration." The amp improves the overall playing experience by producing superb controlled feedback overtones and church (crunch) tones.
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The tone in the provided text is informal and conversational. The speaker expresses their personal preference for the 18 plexi amplifier, describing it as the best sounding 18 they've built. They mention considering the next build using the S111, indicating a comparison between the two amplifiers' layouts. Despite acknowledging the 18 plexi's somewhat dark tone, the speaker expresses love for it and notes its inspiring quality and controlled feedback overtones. The language used is casual and subjective, focusing on the speaker's personal experience and preference.

I see you love your 18 Plexi amp. That's great! The dark, feedback-rich sound from this amp sounds like a great fit for your guitar playing style. If you're looking for another amp to try, I think comparing the sound of the S111 with the current Plexi 18 amp would be a good idea. Each type of amp offers different tones and characteristics, so you can explore which one suits and inspires you the most. Wishing you success with your next amp project! rice purity test

I started with the plexi kit. Great amp but I found the TMB channel to be a bit on the woofy side when pushed with humbuckers. I started doing some mods to try and remove a bit of the flubby feel on the lower registers. I didn't realize it at the time but the mods I implemented put the amp back to an sIII .. well almost. My opinion on this amp is that it can benefit from 0.01 uF coupling caps between the the PI and power amp. Almost all variants over at 18Watt.com have these coupling caps and I think for good reason. Another area to play around is with the bias resistor in the PI. The sIII is biased a bit cooler there and I think that does a good job of taking some harshness away. I still have the coupling cap on the first stage at 0.022 uF ... so almost an sIII. Will reduce that next to see how that changes things.

As far as the normal channel goes ... again if you are using humbuckers, the bypass cap on the first stage needs to be reduced to tighten things up. The 220uF on original schematics is way over the top. I ended up with 2uF there and I think its much better suited for humbucker style guitars. Could put a switch there for options if necessary.

Anyway, regardless of which kit you go for, there are very few changes needed to go between plexi and sIII ...will not affect the layout.