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Author Topic: One 4 Ohm cabinet but two 8 Ohm Jacks on old 1200s  (Read 2737 times)

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Offline bcomnes

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One 4 Ohm cabinet but two 8 Ohm Jacks on old 1200s
« on: September 10, 2001, 09:36:00 am »
Can I get anyone to comment on my old 1200S (the 4x6550 version)

There are two 8 ohm speaker jacks in the back and as far as I can figure, Jack one is 8 ohms and Jack 2 is for a second 8 Ohm cabinet and there is a switching jack that connects the 2 in parallel to the 4 ohm lead of the out put transformer.  Well I only have one 4 ohm cabinet, so my questions is can I put a dummy plug into Jack one and then my single 4 ohm cab into jack 2??  I really don't went to rewire the jacks.  Thanks!
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I enjoy old Sunn stuff, tube and solid state, I have a Concert Bass, Concert slave, 1200s (4X6550, dual rectifier) Concert PA, Studio PA, and an old Acoustic 360 2X15 cab but with Sunn Speakers)

Rock On!!

Offline George Snyder

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One 4 Ohm cabinet but two 8 Ohm Jacks on old 1200s
« Reply #1 on: September 10, 2001, 02:16:00 pm »
Your right about the switching jack connecting to the 4 ohm tap. To use a 4 ohm cab just plug into the second jack (marked external speaker) and your set. No dummy plug is needed in jack one.
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