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MUSICMAN HD 130 Head and cabinet


Posted on Sunday, April 17, 2005 - 07:15 pm:   

Hi there!
I'm posting from Portugal...(am I the only portuguese around here?)

This guy I met told me he had a Musicman HD 130 Head and a 2x12 Musicman cabinet lying around his basement... he hasn't played it in a while, he says the amp got serviced by an incompetent guy 5 o 6 years ago...the guy also stole his other 2x12.
He asked me to check on prices for retubing, and maybe a professional checkup.
He also said he might sell it to me for a low price, because he's not using it...but he doesnt have a clue on how much to ask.
He sent me the following info:

Serial Number : C005960
Chassis Number : 2475-130 EX
Speaker Number : A12 G HD 67-7842

Model 212 HD One Thirty.

So, any idea on the date? Is it the one with the tube phase inverter?

And, how much do I offer the guy? I will see the amp for myself of course...but for now I can only guess
Posted on Monday, April 18, 2005 - 07:32 am:   

The speaker's manufacture date is
the 42nd week of 1978 (-7842). Music Man amps
can't be accurately dated using the serial#.
The phase inverter is the 'small 12AX7 tube'.

If the amp is in perferct working and cosmetic condition, a guess of its worth at around $500US. Not working/poor cosmetic condition lowers the value considerably. (Check the transformers for visible rust.) Some folks find non-working amps in the garbage.

You'll need to see the amp to determine condition, and the $ amount for needed repairs, then make your decision.

Download a copy of the appropriate schematic
from this site to present to a tech in the event that you go forward with this purchase.
Also down load a copy of the biasing instructions on this site, as these amps do not bias like Fenders or Marshalls.
Any competant tech who services Fenders or Marshalls should not have a problem with MMan,
especially with the correct schematics and bias instructions.

Amp Check-up: Approx 1 hour service charge;
Re-tube: approx $100US (tubes and bias)
Re-Cap: approx $120US
De-Mod back to spec - Anybody's guess...
Bad (export) transformer(s): stay away!
Posted on Monday, April 18, 2005 - 12:15 pm:   

Thanks man...When I see the amp, i'll try to take some pics of the inside and outside, and I'll post them here

michael kaus
Posted on Monday, April 18, 2005 - 04:14 pm:   

The fact that it has a late 78 speaker(if it's original) tells me it probably doesn't have a 12ax7 PI tube. Of course, I HAVE been wrong(It was a long time ago).
Posted on Monday, April 18, 2005 - 05:42 pm:   

I saw something about the "One Thirty" ones having the PI Tube, and the "130" not having them...
He said on the message that it had written HD One Thirty...

HD One Thirty head questions

Dear all,

I have recently purchased a MM Music Man HD One Thirty head in an auction.The 1st question is would someone be kind enough to help me identify any information relating to the amps origin? The serial number is as follows: A001769

2nd question. As I assume this is a bass amp could I use it primarily for guitar, as opposed to bass. Equally so could could it be used for both guitar and bass?

As I new to this I would gratefully welcome any advice as to how about using the amps settings.

Kind regards to all MM lovers!


Sure why not?

The 2100 amp is fine for guitar but lacks the reverb and tremolo. Today these effects can be added easily so the amp should be just fine for guitar. The 'bass' channel has a slightly different voicing of the tone stack, but the other channel is identical in voicing to the guitar (reverb) version of the same amp. You can read more about the history of these amps and download lots of information from musicmanamps.com

Lars Verholt

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