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HD130... What is this mod?

I bought this amp many years ago and never knew what this mod is for. There is an extra pot and 1/4" jack tied into the out put jacks and impedance selector.
Does anyone know what this would be used for?

Full Name
Bill Moore

Member for

10 years 9 months

bill_moore Sat, 08/22/2020 - 11:27

Or maybe adjustable line out?

Full Name
Chris Lawson
Music Man Equipment
HD-130

Member for

4 years 4 months

Clawson Sat, 08/22/2020 - 12:00

In reply to by bill_moore

I thought about a line out, but was always a little cautious about connecting anything to the 1/4" jack since it ties into the Output jacks and impedance selector... and of course that it is an obvious Mod that is not labeled haha..

Full Name
Mark Abbott
Music Man Equipment
HD-130

Member for

8 months 3 weeks

Mark Wed, 04/17/2024 - 04:22

The HD-130 have plenty of output, I can only wonder when someone thought they needed a line out to another amp.

Full Name
Mike Griffin
Music Man Equipment
MM 112-RD-65

Member for

10 years 9 months

mgriffin155 Thu, 04/18/2024 - 15:25

Like Bill Moore suggested, perhaps it's for use with studio recording equipment. -mgriffin