JCM800 - JMP and other users, post your settings

[Kapo_Polenton]

As stated, I play with the mid around 6, Bass at 5 (noon), presence 6, treb 6... 500pf bright cap. Usually play with master on 2-3. I'm noticing as of late that i have a tad more high end on the high lead notes than I like. I'm already altering my picking style as i pick too close to the bridge on LP's and it results in a few too many pinched highs (with thicker picks) but it is finding that happy medium between my rythm settings (i like crunch) and lead settings (like it to be a bit smoother) that is tricky. I think the first step is making sure you play dead on to your speaker so that you know what the audience would be hearing. Step 2 is knowing your guitar and pups. Step 3 is settings at lower and higher volume.

GO!

 

[aw9190]

I clipped the bright cap, for low Volume playing they are:

P - 3
B - 3
M - 8
T - 5
G - 5

It is then boosted with an OCD with no dirt, and an od9 with no dirt. At more reasonable volumes they are:

P - 3
B - 3
M - 8
T - 5
G - 8

boosted with od9 with gain at noon level all the way up.

 

[Kapo_Polenton]

Interesting.. I do like the bright cap in but also remember liking it just fine with the cap snipped at lower levels. I always looked at the posted settings of some of the pros and wondered why the treb was set so low for example. Now I know why. The more I sit in front of my 4 x 12, the more it becomes apparent.

 

[reverymike]

Here's a cool trick to try with a JMP (probably works with the 800 too). Turn your treble all the way off. You get a cool mid bump and it really changes the character of the tone.

 

[Kapo_Polenton]

Here's a cool trick to try with a JMP (probably works with the 800 too). Turn your treble all the way off. You get a cool mid bump and it really changes the character of the tone.

I've seen guys running it this way on youtube and surprised it sounded pretty good with an OD. I remember seeing Angus AC DC settings and apparently he plays with the presence off or close to zero?? I think i might need to do some experimenting.. I might like some of my guitars and pups much more.

 

[charveldan]

78' Friedman KS JMP

Presence: 8
Bass: 7
Midz: 5
Treble: 6
Sweet spot on Master: 4 to 5
Pre: 8
Fat switch is usually on.

 

[reverymike]

Turning the Treble all the way off is strange -- it's not like the treble diminishes to the point where it's gone and the amp is bassy. As you turn it down, you notice it getting bassier, but then when it's all the way down, it's like some tone comes back and it has this unique tone to it. It's really cool, and a great trick when doubling parts in the studio.

 

[aw9190]

Interesting.. I do like the bright cap in but also remember liking it just fine with the cap snipped at lower levels. I always looked at the posted settings of some of the pros and wondered why the treb was set so low for example. Now I know why. The more I sit in front of my 4 x 12, the more it becomes apparent.

I received my amp with it snipped. I understand with it in it is brighter unless the pre is up on ten. Does it cut any bass with it in?

Here's a cool trick to try with a JMP (probably works with the 800 too). Turn your treble all the way off. You get a cool mid bump and it really changes the character of the tone.

I will certainly try this as i'll take all the mids i can get

 

[Kapo_Polenton]

Interesting.. I do like the bright cap in but also remember liking it just fine with the cap snipped at lower levels. I always looked at the posted settings of some of the pros and wondered why the treb was set so low for example. Now I know why. The more I sit in front of my 4 x 12, the more it becomes apparent.

I received my amp with it snipped. I understand with it in it is brighter unless the pre is up on ten. Does it cut any bass with it in?

Here's a cool trick to try with a JMP (probably works with the 800 too). Turn your treble all the way off. You get a cool mid bump and it really changes the character of the tone.

I will certainly try this as i'll take all the mids i can get

To my ears those Friedmans are concentrated more in the lower mids. A few people have mentioned they would have thought there would be more cut. Again this is just from what i have heard in clips and what has been written. Looking at your settings I think you might actually benefit from throwing a smaller bright cap in your amp. I know my Randall judge module (supposed to be based on BE) with the saturation switch on is almost like putting a blanket over the tone so the presence and treb have to go up. (as you've indicated as well) From what i understand of the BE mod to a Jet City amp that I had seen circulating, there are some differences in preamp values between the Friedman stuff and a standard JMP-2204 circuit so not sure it would affect the amp the same way ( I mean the turning the treb to 0). As for the bright cap, it will give you the feeling of more crunch and brittleness at lower volumes but that is the intended point of it. It allows you to get the crunch without fizz at lower gain settings.

 

[aw9190]

Interesting.. I do like the bright cap in but also remember liking it just fine with the cap snipped at lower levels. I always looked at the posted settings of some of the pros and wondered why the treb was set so low for example. Now I know why. The more I sit in front of my 4 x 12, the more it becomes apparent.

I received my amp with it snipped. I understand with it in it is brighter unless the pre is up on ten. Does it cut any bass with it in?

Here's a cool trick to try with a JMP (probably works with the 800 too). Turn your treble all the way off. You get a cool mid bump and it really changes the character of the tone.

I will certainly try this as i'll take all the mids i can get

To my ears those Friedmans are concentrated more in the lower mids. A few people have mentioned they would have thought there would be more cut. Again this is just from what i have heard in clips and what has been written. Looking at your settings I think you might actually benefit from throwing a smaller bright cap in your amp. I know my Randall judge module (supposed to be based on BE) with the saturation switch on is almost like putting a blanket over the tone so the presence and treb have to go up. (as you've indicated as well) From what i understand of the BE mod to a Jet City amp that I had seen circulating, there are some differences in preamp values between the Friedman stuff and a standard JMP-2204 circuit so not sure it would affect the amp the same way ( I mean the turning the treb to 0). As for the bright cap, it will give you the feeling of more crunch and brittleness at lower volumes but that is the intended point of it. It allows you to get the crunch without fizz at lower gain settings.

Yes i would say the BE100 has more low mids. truthfully it has a plexi kind of feel to it. I run the treble, presence, and mids higher than the bass on that particular amp.

I was going to try the treble at zero trick on my JMP clone (different amp all together hahaha) this is the amp i was referring to with the bright cap removed. I had a 78 JMP which was completely stock but ran kt-88, man that thing was brittle and bright. I played it through g12t-75s and had a hard time getting sounds that were pleasing to me. When i was selling it i happened to randomly make a clip for the buyer of the amp and used another cab that was loaded with Celestion Relic 30's (pretty dark sounding speakers), and it sounded phenomenal! i had second thoughts about selling it, but ultimately traded it for another amp.

 

[Greazygeo]

The settings make any difference? Just put everything either at noon or everything except the bass at 3:00. Run the bass about 9:00. Running the treble low loses too much gain.

 

[guitarman967]

You def leave the bright cap or the lows become muddy and undefined.
The most important control besides Gain (which is maxed for me) is obviously the treble. It defines how much of the rest of the signal is sent down the line. Mids determine how hard or soft the feel is. Depending on the preamp tubes Ive found slightly under noon feels best for leads. This heads have plently of mids for defined chording.
Presence is always less than noon but it depends the guitar and room.
I always use V30's!!

 

[aw9190]

You def leave the bright cap or the lows become muddy and undefined.
The most important control besides Gain (which is maxed for me) is obviously the treble. It defines how much of the rest of the signal is sent down the line. Mids determine how hard or soft the feel is. Depending on the preamp tubes Ive found slightly under noon feels best for leads. This heads have plently of mids for defined chording.
Presence is always less than noon but it depends the guitar and room.
I always use V30's!!

I may try popping in a bright cap just to see for myself

 

[FourT6and2]

Mids dimed.
Treble around 12:00.
Presence less than 12:00.
Bass zero.
Channels jumped.
Bright gain: 2:30/3:00
Normal gain: 12:00

I think I still have a bright cap in there, but it's probably lower than the standard 500 value. I may have split the difference and gone with 250. Also I have the .68 cap in V2, .68 presence cap, 0.022 caps in all the V1/V2 gain stages, and 100k NFB on 4 ohm tap.

 

[Kapo_Polenton]

Mids dimed.
Treble around 12:00.
Presence less than 12:00.
Bass zero.
Channels jumped.
Bright gain: 2:30/3:00
Normal gain: 12:00

I think I still have a bright cap in there, but it's probably lower than the standard 500 value. I may have split the difference and gone with 250. Also I have the .68 cap in V2, .68 presence cap, 0.022 caps in all the V1/V2 gain stages, and 100k NFB on 4 ohm tap.

My understanding is that the .68 presence cap is supposed to help with the highs. Is this correct? Wasn't it known as the Lynch mod back in the day? I love my cut, just always trying to control that rip your head off treble.

 

[reverymike]

Mids dimed.
Treble around 12:00.
Presence less than 12:00.
Bass zero.
Channels jumped.
Bright gain: 2:30/3:00
Normal gain: 12:00

I think I still have a bright cap in there, but it's probably lower than the standard 500 value. I may have split the difference and gone with 250. Also I have the .68 cap in V2, .68 presence cap, 0.022 caps in all the V1/V2 gain stages, and 100k NFB on 4 ohm tap.

Can you jump channels on a 2204???

 

[Kapo_Polenton]

Nope, no channel mixing, The mixer values are already pre set.. you can dick around with them a bit to change the voicing but you don't have two seperate channels. Instead you have a cleaner channel.

 

[FourT6and2]

Mids dimed.
Treble around 12:00.
Presence less than 12:00.
Bass zero.
Channels jumped.
Bright gain: 2:30/3:00
Normal gain: 12:00

I think I still have a bright cap in there, but it's probably lower than the standard 500 value. I may have split the difference and gone with 250. Also I have the .68 cap in V2, .68 presence cap, 0.022 caps in all the V1/V2 gain stages, and 100k NFB on 4 ohm tap.

My understanding is that the .68 presence cap is supposed to help with the highs. Is this correct? Wasn't it known as the Lynch mod back in the day? I love my cut, just always trying to control that rip your head off treble.

I don't know about a JCM800, but in a 4-hole JMP, the .68 presence cap adds gain in the midrange and drops the fizz in the high-end a bit.

Mids dimed.
Treble around 12:00.
Presence less than 12:00.
Bass zero.
Channels jumped.
Bright gain: 2:30/3:00
Normal gain: 12:00

I think I still have a bright cap in there, but it's probably lower than the standard 500 value. I may have split the difference and gone with 250. Also I have the .68 cap in V2, .68 presence cap, 0.022 caps in all the V1/V2 gain stages, and 100k NFB on 4 ohm tap.

Can you jump channels on a 2204???

I'm talking about a JMP (4-hole). Title of thread says "JCM800 - JMP and other..." It's a little unclear if the OP meant just JCM800 or what. But late 70's Super Lead/Bass circuits are also JMPs.

 

[Norton666]

Bass and mids at 1 o clock , treble at 9 o clock , presence off . I feel like the high end on JMP/JCMs will cut your head off in a hurry , so Im surprised at how many people run the treble and presence past noon .

 

[reverymike]

Mids dimed.
Treble around 12:00.
Presence less than 12:00.
Bass zero.
Channels jumped.
Bright gain: 2:30/3:00
Normal gain: 12:00

I think I still have a bright cap in there, but it's probably lower than the standard 500 value. I may have split the difference and gone with 250. Also I have the .68 cap in V2, .68 presence cap, 0.022 caps in all the V1/V2 gain stages, and 100k NFB on 4 ohm tap.

My understanding is that the .68 presence cap is supposed to help with the highs. Is this correct? Wasn't it known as the Lynch mod back in the day? I love my cut, just always trying to control that rip your head off treble.

I don't know about a JCM800, but in a 4-hole JMP, the .68 presence cap adds gain in the midrange and drops the fizz in the high-end a bit.

Mids dimed.
Treble around 12:00.
Presence less than 12:00.
Bass zero.
Channels jumped.
Bright gain: 2:30/3:00
Normal gain: 12:00

I think I still have a bright cap in there, but it's probably lower than the standard 500 value. I may have split the difference and gone with 250. Also I have the .68 cap in V2, .68 presence cap, 0.022 caps in all the V1/V2 gain stages, and 100k NFB on 4 ohm tap.

Can you jump channels on a 2204???

I'm talking about a JMP (4-hole). Title of thread says "JCM800 - JMP and other..." It's a little unclear if the OP meant just JCM800 or what. But late 70's Super Lead/Bass circuits are also JMPs.

My bad. I got my thread titles mixed up (there's another thread about overdrives for a 2204.