NAD Marshall Vertical Input JCM800 4010

jcm800gridlock

Well-Known Member
Joined
May 16, 2010
Messages
2,202
Reaction score
3,727
Location
Tampa, Fl. USA
A 1984 Vertical Input 50 watt 1x12 JCM800 4010 Combo.

It appears to be all original with a dreaded G12M70 speaker inside. The amp will be going to my tech tomorrow for a checkup. I’m assuming that it will need new tubes and filter caps.

The amp is in a decent 9 out of 10 condition .

As for the G12M70, I have a Celestion Creamback and a C90 boxed and stored away to try with the amp. If those don’t work, I’ll look for a late ‘70s G12-65 or a Scumback to swap in.

Store phone photo for now.

FYI, I actually joined this forum after another Marshall forum shut down and my form name came from my first JCM800. That amp was an ‘83 4104 (same 50 watt circuit but with 2x12’s. There were no bad tones from that amp at band volumes, so this new JCM800 instills some old sentimental value.

A877EAAA-AC8E-4923-A549-BFDD33D4F6DE.jpeg
 
Last edited:

Gene Ballzz

Well-Known Member
Joined
Feb 19, 2013
Messages
4,142
Reaction score
5,296
Location
Las Vegas, NV
A 1984 Vertical Input 50 watt 1x12 JCM800 4010 Combo.

It appears to be all original with a dreaded G12M70 speaker inside. The amp will be going to my tech tomorrow for a checkup. I’m assuming that it will need new tubes and filter caps.

The amp is in a decent 9 out of 10 condition (I noticed a spot where a speaker screw may be protruding into the grill cloth in my, “back of the car photo”, but it really wasn’t noticeable before seeing the photo.

As for the G12M70, I have a Celestion Creamback and a C90 boxed and stored away to try with the amp. If those don’t work, I’ll look for a late ‘70s G12-65 or a Scumback to swap in.

Store phone photo and a “back of the car and on the way home” photo. More photos once home.

FYI, I actually joined this forum after another Marshall forum shut down and my form name came from my first JCM800. That amp was an ‘83 4104 (same 50 watt circuit but with 2x12’s. There were no bad tones from that amp at band volumes, so this new JCM800 instills some old sentimental value.

View attachment 119860 View attachment 119861

You're such a "gear whore!" And I mean that as the sincerest compliment!
:h5:

HNAD, Again!
Gene
 

Trelwheen

Made With Real Bacon
Double Platinum Supporting Member
Joined
Nov 18, 2017
Messages
3,315
Reaction score
8,427
Location
Texas
One of Marshalls greatest combos!

Supercongrats :cheers:

Mine is an '80 model, an old barroom soldier I think. A little beat--up and a large stain running down one side, won't come out....but it still roars
 

Maggot Brain

Well-Known Member
Joined
Dec 13, 2011
Messages
2,918
Reaction score
7,323
Location
Seattle, Washington
HNAD!!!

What a score! One of the best amps I've ever heard was an early 80s vertical input 2204 I used to own... One of my biggest life regrets!

Let us know what speaker you decide on in your new baby, I don't know what Marshall was thinking using G12M70s. I recently bought a 1x12 cab that had one inside and I experimented with it... It's ok for clean but soon as some gain and distortion is involved it falls on it's face.
 

jcm800gridlock

Well-Known Member
Joined
May 16, 2010
Messages
2,202
Reaction score
3,727
Location
Tampa, Fl. USA
M
HNAD!!!

What a score! One of the best amps I've ever heard was an early 80s vertical input 2204 I used to own... One of my biggest life regrets!

Let us know what speaker you decide on in your new baby, I don't know what Marshall was thinking using G12M70s. I recently bought a 1x12 cab that had one inside and I experimented with it... It's ok for clean but soon as some gain and distortion is involved it falls on it's face.
My tech recommended putting a 16 ohm speaker in it, he said Marshall’s sound best with a 16 ohm speaker. I believe both my C90 and my Creamback are 8 ohms. He recommended a Gold since I like my amps with plenty of bass.

I’ll definitely try the Creamback first.

By the way my tech called me after retubing it, he told me to never sell this amp, and if I do, call him first. Guess that it sounds pretty good with all new tubes. He had to order filter caps, so I’ll pick it up next weekend.
 

blues

Active Member
Joined
Oct 7, 2009
Messages
217
Reaction score
220
Great amp. Nice score

Don't listen to your tech and find an original 8 ohm G12-65


I had one of these amps.They sound great with the original G12-65

I had a medical issue come up and I had to sell it. One of my biggest regrets was letting that amp go.
 

jcm800gridlock

Well-Known Member
Joined
May 16, 2010
Messages
2,202
Reaction score
3,727
Location
Tampa, Fl. USA
Great amp. Nice score

Don't listen to your tech and find an original 8 ohm G12-65


I had one of these amps.They sound great with the original G12-65

I had a medical issue come up and I had to sell it. One of my biggest regrets was letting that amp go.
I had G12-65’s in my early ‘80s JCM800 4104 and they were made for that amp. I’ll definitely be on the lookout for a deal on a vintage G12-65.
 
Last edited:


Top