NAD: EVH 5150III 6L6

Ugh... The seeds of doubt are forming and rather quickly. I'm starting to fall out of love with this amp. Chances of keeping it are below 50% now. The only things really keeping me from sending it back today are that I don't want to abuse the MF return policy and because it does ONE thing very well.

I spend all my time doing Paul Gilbert and Andy James style playing. So the most important thing is the pick attack and the sound of the solo notes. The problem with the 5150III, is that the individual notes oscillate to the n'th degree. Everyone who plays distorted lead guitar knows what this is (and I can probably look it up on google and with 30 minutes of research pretend to be an expert on the topic -- it is probably intermodulation distortion). But the 5153, maybe more specifically *this* amp (maybe they vary?), does it to a distracting degree. You hang an individual note and it pulses and oscillates in way to distract from the fundamental tone, almost demanding and forcing me to play vibrato to hide it. And of course every note does it to a different degree and speed. This is with the red channel with gain on half.

I have thought it might be poorly intonated guitar but I'm cycling through all the guitars within reaching distance and they all do it to the same degree.

The other thing, and probably related, is that the pick attack is not as clear and definite. It seems to take up more volume, but also it is not well defined. Its more of a thud than it is a click. I like that the notes are more saturated, but they also have a ton of jank in them.

Also, going back and forth between the Ironheart and the 5153, its clear that the 5153 has one tonal signature. The ONE thing the 5153 does well is saturated metal POWER CHORDS, no one can deny. But there is a mid "honk" that gives it this ability. Its always there, even when you scoop the mids. So its great when you are chugging power chords, but it is ALWAYS THERE when soloing or playing anything.

I can get the Ironheart to do the 5153 thing with an SD1 and right EQ settings on the lead channel, but its not built in like it is with the 5153. I can also loosen up the Ironheart and I can't do that with the 5153.

And then also, the amp is just lacking creature comforts. Its a 2/3rds size amp that needs concentric pots, has tiny channel selectors that interfere with the channel volumes, doesn't have a master volume, the resonance is on the back. It has midi but that doesn't make up for all the compromises. Its 1/2 the price of most current amps because it is half an amp.

It may be that this particular amp is suffering more than normal from the oscillations. The fundamental problem for me is that the solo notes sound janky and that makes it difficult to put up with the compromises. The Laney shows its possible to have clear and defined high gain lead notes.

I feel like an asshole for wanting to return this, but I also wasn't expecting it to have so much jank built into the notes. I don't remember this shit from the JSX. I don't think its an unavoidable feature of high gain amps with layered distortion. The reason I sold the JSX was because it lacked versatility, not because the solo notes were lacking.
 
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Ugh... The seeds of doubt are forming and rather quickly. I'm starting to fall out of love with this amp. Chances of keeping it are below 50% now. The only things really keeping me from sending it back today are that I don't want to abuse the MF return policy and because it does ONE thing very well.

I spend all my time doing Paul Gilbert and Andy James style playing. So the most important thing is the pick attack and the sound of the solo notes. The problem with the 5150III, is that the individual notes oscillate to the n'th degree. Everyone who plays distorted lead guitar knows what this is (and I can probably look it up on google and with 30 minutes of research pretend to be an expert on the topic -- it is probably intermodulation distortion). But the 5153, maybe more specifically *this* amp (maybe they vary?), does it to a distracting degree. You hang an individual note and it pulses and oscillates in way to distract from the fundamental tone, almost demanding and forcing me to play vibrato to hide it. And of course every note does it to a different degree and speed. This is with the red channel with gain on half.

I have thought it might be poorly intonated guitar but I'm cycling through all the guitars within reaching distance and they all do it to the same degree.

The other thing, and probably related, is that the pick attack is not as clear and definite. It seems to take up more volume, but also it is not well defined. Its more of a thud than it is a click. I like that the notes are more saturated, but they also have a ton of jank in them.

Also, going back and forth between the Ironheart and the 5153, its clear that the 5153 has one tonal signature. The ONE thing the 5153 does well is saturated metal POWER CHORDS, no one can deny. But there is a mid "honk" that gives it this ability. Its always there, even when you scoop the mids. So its great when you are chugging power chords, but it is ALWAYS THERE when soloing or playing anything.

I can get the Ironheart to do the 5153 thing with an SD1 and right EQ settings on the lead channel, but its not built in like it is with the 5153. I can also loosen up the Ironheart and I can't do that with the 5153.

And then also, the amp is just lacking creature comforts. Its a 2/3rds size amp that needs concentric pots, has tiny channel selectors that interfere with the channel volumes, doesn't have a master volume, the resonance is on the back. It has midi but that doesn't make up for all the compromises. Its 1/2 the price of most current amps because it is half an amp.

It may be that this particular amp is suffering more than normal from the oscillations. The fundamental problem for me is that the solo notes sound janky and that makes it difficult to put up with the compromises. The Laney shows its possible to have clear and defined high gain lead notes.

I feel like an asshole for wanting to return this, but I also wasn't expecting it to have so much jank built into the notes. I don't remember this shit from the JSX. I don't think its an unavoidable feature of high gain amps with layered distortion. The reason I sold the JSX was because it lacked versatility, not because the solo notes were lacking.
You shouldn't need to put the gain on a 5153 red channel to half.

You probably already mentioned, but are you playing at regular volume?

Never have I ever needed more than 4 on gain for a 5150 amp playing at 1/2 or more volume naturally, nor had oscillation issues.

-I do play some Mr Big with the amp-

I can say this: if your power sources / electricity suck - a 5150 will tell you in all sorts of ways you never knew were a thing.
 
I can say this: if your power sources / electricity suck - a 5150 will tell you in all sorts of ways you never knew were a thing.
I have a Tripp Lite isolation transformer that I play my amps through. I'm not getting background noise, the 5150 is actually really quiet. I'll try other outlets?

I use light gauge strings with a light touch to get singing lead, I use a little more gain. Red on 1/2 seems to be the sweet spot for lead guitar.

You can't hear the note pulse/ oscillate? When you play distorted notes above 12th fret, it doesn't pulse at all? It could be the intonation on all my guitars is off? Other amps do this a little bit, but the 5150 does it alot.
 
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I've never had oscillation issues with any 5150.

(5150 ii, 5150 iii 6L6 50watt, 5150 ii LBX ii, 5150 OG @ a studio & a 5150 iii 100watt @ a studio)

I do have an outlet tester because 5150's do not like ungrounded, or out of phase outlets at all.

If you run pedals or anything through the amp that also is running through subpar electric those amps will let you know.

I play on 9's and have a moderate touch? (guessing on touch)

Never had issue with anything above a 12th fret. (25 1/2 inch scale fret boards though passive humbuckers and a locking trem)

I usually do tell players, there is no where to hide on those amps; they catch everything in your hands.

You might want to try without the transformer, check the outlet (or any pedals?), pull the gain back a bit, or see if it acts the same way in another environment entirely : you might have gotten one with some kind of issue.

PS - what kind of cab are you using?
 
All amps do it to a certain degree. Do you know what I am referring to? Its just very pronounced with this amp.
Might be your pickups are too high, too close to the strings. This can cause weird artifacts like you describe because the magnet is affecting the vibration of the string.
 
Might be your pickups are too high, too close to the strings. This can cause weird artifacts like you describe because the magnet is affecting the vibration of the string.
All of my guitars do it a little different, so I'm hoping its the intonation is off, or maybe interference from neck pickup.

When I run the SD1 in front, its not noticeable, its just when I play direct to the amp that it is most noticeable. So the SD1 scrambles or hides whatever the issue is.

There is something going on. Bad tube? Cold bias? Guitar intonation?
 
You can't hear the note pulse/ oscillate? When you play distorted notes above 12th fret, it doesn't pulse at all? It could be the intonation on all my guitars is off? Other amps do this a little bit, but the 5150 does it alot.
When I see the word oscillation, I think of an unintentional, solid, prolonged, pitched tone accompanying whatever sound you are intentionally making? Are you sure its not ghosting (weird intervaled tones that move with your notes) or perhaps abnormally pronounced intermodulation distortion where you might hear notes "beating"? The later two COULD be tube or bias related.

Oscillation is pretty unusual but I suppose could be a factor at the gain levels you are using.
 
I'm pretty sure what I'm hearing has to do with the harmonics of the note being amplified, probably because intonation is off on these guitars. I don't know why using the SD1 hides it. But anyway...

What I've found when going for an articulate lead guitar sound using the red channel, is that the interplay between the mid and presence knob is most important. Adding treble is just a frequency I don't like that much. The articulate and open lead guitar sounds comes from boosting mid and presence, and the ratio of mid and presence. Cant add too much treble or the whole things gets beamy and harsh. Have to add just enough bass so that it is full but doesn't get muddy.

So the eq seems pretty versatile and there are a couple different ways to dial it in:

1) You can either go forward on bass and treble, and scoop the mids and presence.
2) Or you can go forward with the mids and presence, and duck out the bass and treble.

Now that I found the 2) way of dialing it in that sounds more open and articulate, I'm enjoying it more. The blue channel is easy to dial in no matter how I have the presence set. I find my lead guitar sound on the red channel, then dial in a rhytym tone with blue.

I think that ultimately if I gel with this, that is how I will dial it.

1) Lead guitar sound on red w/ SD1
2) Blue rhythm1 sound boosted w/ SD1
3) Blue rhythm2 w/o boost
4) Clean

I need to reintonate all my guitars.

I will need to rig up some kind of master volume, maybe a volume pedal or EQ pedal.
 
I'm pretty sure what I'm hearing has to do with the harmonics of the note being amplified, probably because intonation is off on these guitars. I don't know why using the SD1 hides it. But anyway...

What I've found when going for an articulate lead guitar sound using the red channel, is that the interplay between the mid and presence knob is most important. Adding treble is just a frequency I don't like that much. The articulate and open lead guitar sounds comes from boosting mid and presence, and the ratio of mid and presence. Cant add too much treble or the whole things gets beamy and harsh. Have to add just enough bass so that it is full but doesn't get muddy.

So the eq seems pretty versatile and there are a couple different ways to dial it in:

1) You can either go forward on bass and treble, and scoop the mids and presence.
2) Or you can go forward with the mids and presence, and duck out the bass and treble.

Now that I found the 2) way of dialing it in that sounds more open and articulate, I'm enjoying it more. The blue channel is easy to dial in no matter how I have the presence set. I find my lead guitar sound on the red channel, then dial in a rhytym tone with blue.

I think that ultimately if I gel with this, that is how I will dial it.

1) Lead guitar sound on red w/ SD1
2) Blue rhythm1 sound boosted w/ SD1
3) Blue rhythm2 w/o boost
4) Clean

I need to reintonate all my guitars.

I will need to rig up some kind of master volume, maybe a volume pedal or EQ pedal.
Just put something like this in the loop….


BTW, no oscillations here. Others may feel differently but I’d look at swapping some preamp tubes. I’d start with V4-V6 and then, less likely V1.
IMG_0382.jpeg
 
I need to figure this out.

When tuning two notes to the same note, when they are slightly off, you get what is called "beating". We all know what this is.

With the 5150, i get this beating when playing just one note. each note above 12 does it at different speed and intensity.

I had convinced myself it was an intonation issue, but what if different parts of the distortion circuit are causing some kind of minor pitch shift? Or phasing which is causing parts of the note to oscillate out?

There is something bad going on. Either guitar intonation or the amp has a problem. The sd1 completely hides the issue. But the amp overall sounds veiled and less clear when its happening.
 
Again:

1) what cab are you using?

B) Have you tried using the amp in a different situation (room, outlet w/o your power conditioner)

1.5) Based on how you talk about sounds aurally, I highly doubt its your intonation.

A) You might have a defect, or a wonky tube.

2 cents) The only tone controls on any 5150 I've ever used that goes past 1/2 is the bass & resonance (Which I match them at about 1 o'clock)


Decent 5150 tone controls: Pre Gain : between 9 and 11 o'clock, bass: 1 o'clock, mids: 9 o'clock, treble: 11 o'clock, post: between 11 o'clock and high noon, resonance: 1 o'clock, presence: 11 o'clock.
 
Yeah I don't know. I never had any oscillation issues with the EVHs.
Has to be tubes or the guitar setup.

It would be easier to diagnose it if you posted a clip of the issue.
Here is the problem. You can hear that the notes aren't clear and that they seem to oscillate or waver. The individual notes don't sound good. This is plugged direct to red channel.

Does it with all my guitars. When I put an SD1 in front, it completely masks it or stops it from happening. I'm stumped.

The Ironheart notes are clear and true. Only happens with this new amp.

 
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