I love the dark fret board on that gold top. Probably ebony. Oh wow that’s the old style ABR1 bridge ? I know this guy has good ears just by seeing that.
Your playing is just fine. Both amps sound great. The JTM45 w/KT66's (?) has more sag and is more hollow sounding, as you've said, because it's a bass circuit with a tube rectifier. The JMP50 w/EL34's is more immediate sounding and has more midrange because it's a lead circuit with a SS rectifier. A JTM50 is a nice compromise between the 2 while adding some extra good stuff and then flip a coin on rectifier type.
JTM 45 will always have less midrange because if the KT66's in comparison to the 50 with EL34's. 34's have that midrange time and KT66's are in the 6L6 family so have less mids. I love the JTM 45 though. I need one.
Definitely agree that each rectifier be it tube or solid state has its place no doubt it. I personally like solid state rectifiers. If I could only have one amp and I had to gig with it and record with it would have the diode rec. However I’ve been blessed enough to be able to acquire many amps over the years starting about age 8 with a a little hand me down Fender Princeton (don’t get me wrong when I say little I mean the size not the volume or tone). I’m getting ready to turn 39 in a few weeks and I still have that amp along with the many other amps I’ve gotten over the years. I’ve never gotten rid of any except one and I regretted it fully with in 6 months. In my teens through my 20’s I was very busy with music. Writing, gigging, recording and touring. Sometimes up to three bands at once. I played hardcore, Crust/D-beat, grindcore, Metal, and doom/sludge/stoner metal! So I found when playing in really loud bands be it fast hardcore or slow doom metal that a solid state rectifier had so so so much more clarity especially anything over 5, it just kept a tightness, so I always giggled with a Marshall Superbass Plexi fullstack, or a Marshall JCM800 100watt full stack. I dimes everything except presence and reverb. However for recording, and rehearsal I used my boogie Dual Rectifier, and my boogie DC-5 (which yes that’s is a solid rect.). The dual sounded super warm and clear on recordings. We never practiced dimed, we kept it around 4-6 so we could hear mistakes and correct them. If we played a smaller 400 person club I would run the DC-5 as my stack head. Because it was always loud with a to of distortion so it’s not like I needed the hard room plus everything would be mic’d anyway. So of corse I dimed it!!! Ultimately I got a sold state plug in for for my rectifier and it was super easy! Pull out the rec. tube(s) and plug in the ss rect. But I still continued to use my Marshall’s and hiwatt stacks to gig. If I was the only guitarist in a band I’d use a stack on each side and so would the bassist! It was devastating LOL!!!!!! So yeah without going into extreme detail that’s how I feel about rectifiers. Cool video thanks for posting!!!
Wow, I'm glad you posted this, I'm wanting to build a kit at some point, and this is a real help. I think I like the JMP better for what I am wanting to do. The JTM seems sharper, but I'm really liking the bass sound of the JMP. In 1980 I would have picked the JTM for the biting compressed highs.
Thanx! The JTM is being used in my band and its design is one of rocks best sound. The JMP in this video (I think) is a 1968 Vintage 50 watt...Not my build but a real Marshall dream Machine. However both kits are available. I say just grab up some parts and go for it....I did a 1959 Plexi too, and that's a great Mod Machine...I can Mod it all day long and it wont loose value like a real Marshall...I get my parts from Valvestorm ...happy building!
I have a JTM45 from 1989. All stock. Sounds killer. Cabs do make a difference. Have a 1960TV, PPC212 closedback, and a Carvin 212E openback with Greenbacks and a Peavey JSX 412 bottom. Depending on the venue and style/group determine the cab needed. Nice amp comparison. You should compare your cabs against your JTM and JMP.
@@fdgdfgvvdfvred6305 if play straight dirty rock, the 1960TV. It has the original greenbacks in it. If doing something cleaner then the carvin 212 openback with the G12H-75's. That TV gets that old school vibe in spades.
Vai loves loose bottom ends, which his Legacy amps have. Listen to "Frank" by Vai, it really shows how beautiful "loose" can be. The JTM45 wins here. And be good to that kitten.
SS rectification doesnt sterilize anything, in a good amp: case in point - I ve got a Ladner Amps (great guys..) replica of 1971 metal panel JMP50.. handwired on ceramic strips you can switch from tube rectif. to SS on the fly... sounds tighter with SS, maybe ? - maybe I wouldnt recognize at all
Hi, Thanks for making this video. It's immensely helpful to hear those amps before making a decision on which one to buy! Does the 45 have KT66 or EL34? Are they both the same kind of speakers? Which brand/model?
the JTM 45 in this video has Kt-66 tubes and its tube rectified, the 50 watt has the EL-34's ....the problem with this comparison is I didn't use the same cabinet (I should have) because both cabs are very different....I am pretty sure the JTM is through the Marshall 4x12 cab with 25 watt green backs (Slant cab) ...Its was a very new cabinet at the time....Its stiff and tight in this video.....However the amp sounds as good today as it did then....The 50 watt through a unknown name cab....its a 4x12 straight cab, I got it empty. It has 2 green back 25 watt speakers and 2 Celestion 75 watt speakers, its a very loose cab and it projects a low of low end...(I think is was originally a bass cab) Depending on your music choice .....I like the both amp but the JTM 45 is more versatile, less power....but cleans up nice, the 50 watt seems to be a strictly rock amp....it stays dirty all the time....hope that helps
50 sounds better to me than 45, ummm.... depends cab what ever, i got the JMP50, but been dreaming about JTM45 now confused demos good, maybe need more organise.......thankyou anyway
Hey thanks, I get what you mean...I don't make video's too often and the way my music area is set up, is not like a studio. Kinda difficult to do perfect comparisons. But thanks for the comment.
But to aid you in choices the JTM 45 is very close to the JMP 50 .....The biggest difference is the The JTM45 is close to the the 1986 (Bass Model) as far as the circuit is concerned . That and the power tubes ....are the main differences, thats what makes the JMP 50 more brighter and have less headroom....they are both excellent amps. An good rule of thumb is the JMP 50 is a rock amp and the JTM45 is blues or country/blues.....More head room slightly more bass in the voicing.
GuitarHack123 i’m sure everybody’s already corrected you about a jtm 45 being only 30w. But we know Marshall wattage. Get it up to 10% THD and it’s suddenly 175% of the rating.
Yes but you need to be aware of the ohm rating, are they 4ohms, 8ohms or 16 ohms...then you need to know what they will sum to after wiring them up and set the amp the that rating. Jtm45's have a setting on the back of 4, or 8 or 16 ohms. Research speaker wiring on google to get the correct formula...measure with a meter to check your work THEN set the switch to the right setting. You could damage the amp doing it wrong...but its easy, don't let it scare you
It would only be safe providing you don't play it cranked all the time. The 35w amp would already be exceeding the speaker rating at 30w and the JTM at full volume would probably be kicking out more than 35w therefore running a risk of blowing the speakers.
I have not compared it to the Germino amps, but I hear those are an excellent amplifier....I would venture to guess that they are updated with various mods to the original Marshall Circuits, The JTM45 is build to the exact specs it was in 1965, and the JMP is from 1968....I would love to see what's under the hood of a Germino!
thats not all just SS vs Tube rectifier ...thats gotta be alot due to the tone shaping (circuit) diiferences, THE JMP sounds a little nasaly but i dont dislike it for hard rock rythyms. the 45 better clean/semi clean and more bluesy for leads. Im considering a JTM 50 from Ceriatone or similar - those seems to have best of both , COOL DEMO :)
Thanx, I agree the JTM45 is a cleaner amp. (I use it in band for the stones tunes) The JTM 45 is a lot like the Fender Bassman infact the JTM45 is more like a 1986 (superbass) the JMP is a master volume 1959 thanx for watching
JTM sounds pure. Far prefer it. Early AC/DC was sometimes cranked JTM's. Don't be harsh on your playing. Self deprecation didn't alter the tone but neither does it encourage confidence. Yes cab will make a difference, but there is sufficient core truth here. If being out of tune brings out fucking Godamnit, you're not band ready. That would bring the same response from me Goddamnit I ain't got time for his fucking shit....or cat whining. If that's outside your comfort zone that sucks more than the simplicity of moving out of a comfy chair. Being in a band might change the playing, but being organised with basics, choosing and tuning the right guitar or not practising when you have other commitments is a basic to not piss other band members off. Would you rather have an organised, committed and reliable player than an unreliable out of tune half arsed gun?
The 50 watt sounds way better then the 45.But the best Marshall i ever heard is a 1971 50 watt bass head model 1986 amazing sounding amp.I like the bass Marshalls the best because they work better with pedals then the normal super leads.Just listen to Gary Moore"Corridors of power"and "Victim of the future"thats the best guitar sound ever recorded on an album and thats a 100 watt Marshall bass from 71 handwired with a Boss DS1 amazing!
GuitarHack123 I've used his parts many times. Very good. Your amps sound fantastic. Welcome to the sickness of building amps. It all started with a 18 watt for me and now I can't stop.
Say what? Diode rectifying sterilizes the music? I am so sorry but you do not have no idea about you are talking about. Thank you for sharing wrong ideas and knowledges.
its a subjective opinion...it means nothing...but I'm sticking to it...tube rectification is warmer...diode rectification is very efficient and therefore less prone to variation...therefore my opinion is "correct" besides it the power supply and it affects "tone" only slightly.
Hello, I can understand this is a subjective opinion, but please, sometime that kind of thinkings make the people go wrong or being believing in "magical" things with regard thinks like old NOS tubes, carbon resistors, resistors, capacitors, etc. The diode rectification is much efficient than tube rectification and it regards the nature of the component. Consider this: The tube is the worst and the most unstable part in the amp. The tube rectification makes that the signal being more compressed due the plate voltage is less than the diode rectification method. So you will get a more compressed sound (and this means less harmonics). The diode rectification provides a bit higher plate voltage so it makes a bit warmer sounding and a more "open sound" due your power tubes being warmer. If you switch from tube to diode you probably get a "bigger amp" with a bit more headroom and a more "live" signal. But not a sterilized signal or a sterilized sound. Sometimes much of us think about "all-tube" means "the perfect amp and sounding" but this is not 100% true.
Hmmmmm….ok I'll go with that...you know how NOS tubes got started? It was their ability to last much longer and put up with more abuse. Somehow that translates to "better" tone... I'm not expressing an opinion regarding Caps. But that's all about how their values drift over time. no cap is going to be an exact measure and those differences in their values can lend to some interesting results.
Hello, The NOS acronym means New Old Stock and it means that those parts (tubes, caps, resistors) were made but never used until now. So a general idea with regard "best tone on NOS parts" is about , more or less, many years ago there wasn't silicon transistors (silicon made) so that tubes were our current transistors. Those tubes were made to build anything: Radios, computers, signal processors, military stuff, etc, so those tubes must had to be durable over the time (and trust me, the tube is the most unstable part in an amp). So those tubes were a pretty well made tubes. I am not saying that the NOS tubes are the holy grail of tone or the current tubes are rubbish, you know. There are a lot of parts to improve into an amp, before the tubes, to improve the final sound: like the speaker, the output transformer, the filtering capacitors, good and isolated wiring ... and then probably the tubes. With regard the caps ... the old caps probably being dried and it means a unproper/poor signal filtering. But this is bad for our ears? As an instance, what' happening with the vinyl music? It is a low quality? Well, compared against the CD the vinyl, technically, is worst ... but not to our ears (sometimes). Sometimes all of that regard NOS components, vintage parts and blababla is all about our perception and our autosuggestion .
I love the dark fret board on that gold top. Probably ebony. Oh wow that’s the old style ABR1 bridge ? I know this guy has good ears just by seeing that.
Your playing is just fine. Both amps sound great. The JTM45 w/KT66's (?) has more sag and is more hollow sounding, as you've said, because it's a bass circuit with a tube rectifier. The JMP50 w/EL34's is more immediate sounding and has more midrange because it's a lead circuit with a SS rectifier. A JTM50 is a nice compromise between the 2 while adding some extra good stuff and then flip a coin on rectifier type.
Very nice, thanks for posting. I, too, would've preferred the comparison using the same cabinet.
JTM 45 will always have less midrange because if the KT66's in comparison to the 50 with EL34's. 34's have that midrange time and KT66's are in the 6L6 family so have less mids. I love the JTM 45 though. I need one.
Great segment, thank you for doing this. Great tones.
Definitely agree that each rectifier be it tube or solid state has its place no doubt it. I personally like solid state rectifiers. If I could only have one amp and I had to gig with it and record with it would have the diode rec. However I’ve been blessed enough to be able to acquire many amps over the years starting about age 8 with a a little hand me down Fender Princeton (don’t get me wrong when I say little I mean the size not the volume or tone). I’m getting ready to turn 39 in a few weeks and I still have that amp along with the many other amps I’ve gotten over the years. I’ve never gotten rid of any except one and I regretted it fully with in 6 months. In my teens through my 20’s I was very busy with music. Writing, gigging, recording and touring. Sometimes up to three bands at once. I played hardcore, Crust/D-beat, grindcore, Metal, and doom/sludge/stoner metal! So I found when playing in really loud bands be it fast hardcore or slow doom metal that a solid state rectifier had so so so much more clarity especially anything over 5, it just kept a tightness, so I always giggled with a Marshall Superbass Plexi fullstack, or a Marshall JCM800 100watt full stack. I dimes everything except presence and reverb. However for recording, and rehearsal I used my boogie Dual Rectifier, and my boogie DC-5 (which yes that’s is a solid rect.). The dual sounded super warm and clear on recordings. We never practiced dimed, we kept it around 4-6 so we could hear mistakes and correct them. If we played a smaller 400 person club I would run the DC-5 as my stack head. Because it was always loud with a to of distortion so it’s not like I needed the hard room plus everything would be mic’d anyway. So of corse I dimed it!!! Ultimately I got a sold state plug in for for my rectifier and it was super easy! Pull out the rec. tube(s) and plug in the ss rect. But I still continued to use my Marshall’s and hiwatt stacks to gig. If I was the only guitarist in a band I’d use a stack on each side and so would the bassist! It was devastating LOL!!!!!! So yeah without going into extreme detail that’s how I feel about rectifiers. Cool video thanks for posting!!!
should do this comparison with the different heads running through same cab
seems to be the consensus I'll do one soon
came for the tones...stayed for the swearing LOL
Are these original vintage amps?
The JMP 50 watt is a vintage 1969
45 - higher fidelity.... Jimmy Page would be proud of that tone...
Wow, I'm glad you posted this, I'm wanting to build a kit at some point, and this is a real help. I think I like the JMP better for what I am wanting to do. The JTM seems sharper, but I'm really liking the bass sound of the JMP. In 1980 I would have picked the JTM for the biting compressed highs.
Thanx! The JTM is being used in my band and its design is one of rocks best sound. The JMP in this video (I think) is a 1968 Vintage 50 watt...Not my build but a real Marshall dream Machine. However both kits are available. I say just grab up some parts and go for it....I did a 1959 Plexi too, and that's a great Mod Machine...I can Mod it all day long and it wont loose value like a real Marshall...I get my parts from Valvestorm ...happy building!
I have a JTM45 from 1989. All stock. Sounds killer. Cabs do make a difference. Have a 1960TV, PPC212 closedback, and a Carvin 212E openback with Greenbacks and a Peavey JSX 412 bottom. Depending on the venue and style/group determine the cab needed. Nice amp comparison. You should compare your cabs against your JTM and JMP.
What cab do you like best with your jtm45? Do you use g12m 75hz speakers? I've been wanting to try g12h 55hz with my jtm45 though
@@fdgdfgvvdfvred6305 if play straight dirty rock, the 1960TV. It has the original greenbacks in it. If doing something cleaner then the carvin 212 openback with the G12H-75's. That TV gets that old school vibe in spades.
Cabs make allllllllllllll the difference! So true!
The biggest difference is the cabs. Give us the same cab on both heads so we can really hear differences.
I guess I'l have to...but this guitar (amazing as it was) is gone....the previous owner begged and pleaded to sell it back to him....
@@emergencynurse02 That thing is amazing man
the 45 doesn't have a chance with that cab. play it thru the TV cab, then you'd have a proper demo. just sayin...
Vai loves loose bottom ends, which his Legacy amps have. Listen to "Frank" by Vai, it really shows how beautiful "loose" can be. The JTM45 wins here. And be good to that kitten.
SS rectification doesnt sterilize anything, in a good amp:
case in point - I ve got a Ladner Amps (great guys..)
replica of 1971 metal panel JMP50.. handwired on ceramic strips
you can switch from tube rectif. to SS on the fly...
sounds tighter with SS, maybe ? - maybe I wouldnt recognize at all
Your JMP sounds Huge !!!Very chunky and woody sounding .
Fantastic playing and fantastic video! Nice amps
thanx!
Hi, Thanks for making this video. It's immensely helpful to hear those amps before making a decision on which one to buy! Does the 45 have KT66 or EL34? Are they both the same kind of speakers? Which brand/model?
the JTM 45 in this video has Kt-66 tubes and its tube rectified, the 50 watt has the EL-34's ....the problem with this comparison is I didn't use the same cabinet (I should have) because both cabs are very different....I am pretty sure the JTM is through the Marshall 4x12 cab with 25 watt green backs (Slant cab) ...Its was a very new cabinet at the time....Its stiff and tight in this video.....However the amp sounds as good today as it did then....The 50 watt through a unknown name cab....its a 4x12 straight cab, I got it empty. It has 2 green back 25 watt speakers and 2 Celestion 75 watt speakers, its a very loose cab and it projects a low of low end...(I think is was originally a bass cab)
Depending on your music choice .....I like the both amp but the JTM 45 is more versatile, less power....but cleans up nice, the 50 watt seems to be a strictly rock amp....it stays dirty all the time....hope that helps
Yes, both are cool. But I liked the 45 better. By the way, this was a great demo, thank you
50 sounds better to me than 45, ummm.... depends cab what ever, i got the JMP50, but been dreaming about JTM45 now confused demos good, maybe need more organise.......thankyou anyway
Hey thanks, I get what you mean...I don't make video's too often and the way my music area is set up, is not like a studio. Kinda difficult to do perfect comparisons. But thanks for the comment.
But to aid you in choices the JTM 45 is very close to the JMP 50 .....The biggest difference is the The JTM45 is close to the the 1986 (Bass Model) as far as the circuit is concerned . That and the power tubes ....are the main differences, thats what makes the JMP 50 more brighter and have less headroom....they are both excellent amps. An good rule of thumb is the JMP 50 is a rock amp and the JTM45 is blues or country/blues.....More head room slightly more bass in the voicing.
So why didn't you demo them through the same cab to get a real comparison? Yes speakers/cab is a huge difference on tone.
Kitten ok?
She is fine....all grown up ....still a big scardy cat, afraid of her own shadow...but lovable and cute
GuitarHack123 i’m sure everybody’s already corrected you about a jtm 45 being only 30w. But we know Marshall wattage. Get it up to 10% THD and it’s suddenly 175% of the rating.
Just wondered if you could tell me, is it safe to use two Celestion alnico blue speakers with a JTM 45 at 35watts
Yes but you need to be aware of the ohm rating, are they 4ohms, 8ohms or 16 ohms...then you need to know what they will sum to after wiring them up and set the amp the that rating. Jtm45's have a setting on the back of 4, or 8 or 16 ohms. Research speaker wiring on google to get the correct formula...measure with a meter to check your work THEN set the switch to the right setting. You could damage the amp doing it wrong...but its easy, don't let it scare you
It would only be safe providing you don't play it cranked all the time. The 35w amp would already be exceeding the speaker rating at 30w and the JTM at full volume would probably be kicking out more than 35w therefore running a risk of blowing the speakers.
Have you played a Germino Club 40? If so, how does it compare to these?
I have not compared it to the Germino amps, but I hear those are an excellent amplifier....I would venture to guess that they are updated with various mods to the original Marshall Circuits, The JTM45 is build to the exact specs it was in 1965, and the JMP is from 1968....I would love to see what's under the hood of a Germino!
thats not all just SS vs Tube rectifier ...thats gotta be alot due to the tone shaping (circuit) diiferences, THE JMP sounds a little nasaly but i dont dislike it for hard rock rythyms. the 45 better clean/semi clean and more bluesy for leads. Im considering a JTM 50 from Ceriatone or similar - those seems to have best of both , COOL DEMO :)
Thanx, I agree the JTM45 is a cleaner amp. (I use it in band for the stones tunes) The JTM 45 is a lot like the Fender Bassman infact the JTM45 is more like a 1986 (superbass) the JMP is a master volume 1959 thanx for watching
Not a fair comparison unless the same cab is used for both
JTM sounds pure. Far prefer it. Early AC/DC was sometimes cranked JTM's. Don't be harsh on your playing. Self deprecation didn't alter the tone but neither does it encourage confidence. Yes cab will make a difference, but there is sufficient core truth here. If being out of tune brings out fucking Godamnit, you're not band ready. That would bring the same response from me Goddamnit I ain't got time for his fucking shit....or cat whining. If that's outside your comfort zone that sucks more than the simplicity of moving out of a comfy chair. Being in a band might change the playing, but being organised with basics, choosing and tuning the right guitar or not practising when you have other commitments is a basic to not piss other band members off. Would you rather have an organised, committed and reliable player than an unreliable out of tune half arsed gun?
Both are cool....
JTM45 all the way
Test them with a Strat, thanks..
If I had a start that could accommodate Humbuckers ....you bet your sweet bippy I would!
oh...I thought you meant the pickups!! Duh!!!
OK I'll run the Strat through the amps soon and do a similar video...! Thanx for watching !
The 50 watt sounds way better then the 45.But the best Marshall i ever heard is a 1971 50 watt bass head model 1986 amazing sounding amp.I like the bass Marshalls the best because they work better with pedals then the normal super leads.Just listen to Gary Moore"Corridors of power"and "Victim of the future"thats the best guitar sound ever recorded on an album and thats a 100 watt Marshall bass from 71 handwired with a Boss DS1 amazing!
Do
You build Roberts kits?
yes
GuitarHack123 I've used his parts many times. Very good.
Your amps sound fantastic. Welcome to the sickness of building amps. It all started with a 18 watt for me and now I can't stop.
Say what? Diode rectifying sterilizes the music? I am so sorry but you do not have no idea about you are talking about. Thank you for sharing wrong ideas and knowledges.
its a subjective opinion...it means nothing...but I'm sticking to it...tube rectification is warmer...diode rectification is very efficient and therefore less prone to variation...therefore my opinion is "correct" besides it the power supply and it affects "tone" only slightly.
Hello,
I can understand this is a subjective opinion, but please, sometime that kind of thinkings make the people go wrong or being believing in "magical" things with regard thinks like old NOS tubes, carbon resistors, resistors, capacitors, etc.
The diode rectification is much efficient than tube rectification and it regards the nature of the component. Consider this: The tube is the worst and the most unstable part in the amp. The tube rectification makes that the signal being more compressed due the plate voltage is less than the diode rectification method. So you will get a more compressed sound (and this means less harmonics). The diode rectification provides a bit higher plate voltage so it makes a bit warmer sounding and a more "open sound" due your power tubes being warmer. If you switch from tube to diode you probably get a "bigger amp" with a bit more headroom and a more "live" signal. But not a sterilized signal or a sterilized sound.
Sometimes much of us think about "all-tube" means "the perfect amp and sounding" but this is not 100% true.
Hmmmmm….ok I'll go with that...you know how NOS tubes got started? It was their ability to last much longer and put up with more abuse. Somehow that translates to "better" tone... I'm not expressing an opinion regarding Caps. But that's all about how their values drift over time. no cap is going to be an exact measure and those differences in their values can lend to some interesting results.
Hello,
The NOS acronym means New Old Stock and it means that those parts (tubes, caps, resistors) were made but never used until now. So a general idea with regard "best tone on NOS parts" is about , more or less, many years ago there wasn't silicon transistors (silicon made) so that tubes were our current transistors.
Those tubes were made to build anything: Radios, computers, signal processors, military stuff, etc, so those tubes must had to be durable over the time (and trust me, the tube is the most unstable part in an amp).
So those tubes were a pretty well made tubes. I am not saying that the NOS tubes are the holy grail of tone or the current tubes are rubbish, you know. There are a lot of parts to improve into an amp, before the tubes, to improve the final sound: like the speaker, the output transformer, the filtering capacitors, good and isolated wiring ... and then probably the tubes.
With regard the caps ... the old caps probably being dried and it means a unproper/poor signal filtering. But this is bad for our ears? As an instance, what' happening with the vinyl music? It is a low quality? Well, compared against the CD the vinyl, technically, is worst ... but not to our ears (sometimes).
Sometimes all of that regard NOS components, vintage parts and blababla is all about our perception and our autosuggestion .
the 45 doesn't have a chance with that cab. play it thru the TV cab, then you'd have a proper demo. just sayin...