Mark IV versions?

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virtu
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Mark IV versions?

Post by virtu » Mon Apr 11, 2011 5:15 pm

Hi mates.
I found a second hand mark iv to buy.
How i can check the version? From the serial number? I heard that the "IVb" is better(?).
is there any differences between the short and medium head versions?
thanks!

virtu
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Re: Mark IV versions?

Post by virtu » Tue Apr 12, 2011 7:20 am

Ok guys, sorry...i should read the sticky first...:)
But i didn't find any info about the differences between the short and medium head.
Anybody?
thanks

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Re: Mark IV versions?

Post by ANIMATED SUSPENSION » Tue Apr 12, 2011 1:29 pm

Sonically identical, the medium head has more switches on the front, the short has them on the back instead.
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virtu
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Re: Mark IV versions?

Post by virtu » Tue Apr 12, 2011 4:35 pm

Thanks mate!

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ryjan
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Re: Mark IV versions?

Post by ryjan » Tue Apr 12, 2011 4:51 pm

The A version will have an attached power cord, slightly less gain in rhythm 2, and slightly more raw lead channel.
Either one is a good choice. :D
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Re: Mark IV versions?

Post by K-Roll » Wed Apr 13, 2011 8:31 am

I second that! I have a mark4 early 90s version and it has just as described- less gain on rhy2, which still makes it a good crunch channel, when boosted with ts808 it gets even heavier and the lead channel is not as smooth and dark as on newer mark4Bs, it is rather rawer sounding with slightly more treble, I'd say a little more markIIIesque, on its own it may sound weird but in a band situation it plays like heaven :) at least mine does

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Re: Mark IV versions?

Post by Boogiebabies » Wed Apr 13, 2011 11:44 am

ryjan wrote:The A version will have an attached power cord, slightly less gain in rhythm 2, and slightly more raw lead channel.
Either one is a good choice. :D
Incorrect info. Around 6-700 MK IVB's from late 1993 to early 1994 have attached power cords.
For serial numbers, anything around 6000-6300 is a possible IVA anything over is a possible IVB.
As with anything Mesa, there may be some blurring between the models around 6200-6300 like the IVA/B
which could have the IVA circuit but stereo loops.

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Re: Mark IV versions?

Post by dodger916 » Thu Apr 14, 2011 8:52 am

Boogiebabies wrote:
ryjan wrote:The A version will have an attached power cord, slightly less gain in rhythm 2, and slightly more raw lead channel.
Either one is a good choice. :D
Incorrect info. Around 6-700 MK IVB's from late 1993 to early 1994 have attached power cords.
For serial numbers, anything around 6000-6300 is a possible IVA anything over is a possible IVB.
As with anything Mesa, there may be some blurring between the models around 6200-6300 like the IVA/B
which could have the IVA circuit but stereo loops.
+1. My IVB head has attached power cord and serial number just over 8100.

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Re: Mark IV versions?

Post by reilly » Thu Apr 14, 2011 1:10 pm

I have a late #59xx Mark IV B with an attached Power cable, reverb jack and B Style effects loop Dated 1993
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cho
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Re: Mark IV versions?

Post by cho » Fri Apr 15, 2011 8:10 pm

Boogiebabies wrote:
ryjan wrote:The A version will have an attached power cord, slightly less gain in rhythm 2, and slightly more raw lead channel.
Either one is a good choice. :D
Incorrect info. Around 6-700 MK IVB's from late 1993 to early 1994 have attached power cords.
For serial numbers, anything around 6000-6300 is a possible IVA anything over is a possible IVB.
As with anything Mesa, there may be some blurring between the models around 6200-6300 like the IVA/B
which could have the IVA circuit but stereo loops.

I am intrigued by these A/B versions with the A circuit, but with stereo loops. My Mark IV is S/N 614X, with the attached power cord, and the stereo loops. How can I tell which version circuit I have? Is there an indication on the ouside? Or, on the circuit boards inside?

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Re: Mark IV versions?

Post by littlephil » Sat Apr 16, 2011 7:43 am

^If it has 4 FX loop jacks its an A. Also an A would not have a reverb footswitch jack or Satellite send jack.

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Re: Mark IV versions?

Post by cho » Sun Apr 17, 2011 3:32 pm

littlephil wrote:^If it has 4 FX loop jacks its an A. Also an A would not have a reverb footswitch jack or Satellite send jack.
Apparently, there were some A circuit Mark IV's that were made with the stereo effects loop, satellite send, and rev. footswitch. (Someone please correct me if I am wrong....) Does anyone have one of these models?

I may have to pull the chassis, to see if there is any indication on the circuit boards which model I have....

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Re: Mark IV versions?

Post by dodger916 » Tue Apr 19, 2011 1:15 am

cho wrote:
littlephil wrote:^If it has 4 FX loop jacks its an A. Also an A would not have a reverb footswitch jack or Satellite send jack.
Apparently, there were some A circuit Mark IV's that were made with the stereo effects loop, satellite send, and rev. footswitch. (Someone please correct me if I am wrong....) Does anyone have one of these models?
I believe this is correct, and these might be referred to as "No A/ No B".

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