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Jack Plate - Marshall, Switchable Stereo / Mono
Switchable stereo/mono jack plate for back of cabinets.
Dimensions:
| Interior Length | 3.58 in. | |
| Interior Width | 2.90 in. | |
| Item Length | 4.75 in. | |
| Item Width | 3.50 in. | |
| Mounting Hole Center to Center A | 4.09 in. | |
| Mounting Hole Center to Center B | 2.90 in. |
| Packaging Dimensions | 4.8 in. × 3.6 in. × 2.6 in. | |
| Weight (Packaging) | 0.237 lbs. |
 Dimensions | All Models |
My Project Lists
Specifications, Files, and Documents
Questions and Answers
Click each question to see its answers.
1 answers
Ok so if I have a 4-12 marshall cabinet with all 16 ohm speakers and I use this plate and wiring harness what ohms would each side of the cabinet end up?
Asked by Anonymous on October 20th, 2015.
October 21st, 2015
Staff MemberTop Contributor
If your 4 x 12″ is fitted with four 16 Ohm speakers it can be wired for 16 Ohm mono, 4 Ohm mono or 8 Ohm stereo.
1 answers
Does this come with wiring instructions?
Asked by Anonymous on October 27th, 2015.
October 27th, 2015
Staff MemberTop Contributor
As this is designed as a drop in replacement for Marshall cabs, installation instructions are not included.
1 answers
do all measurements align w/marshall 1960a stereo/mono switchable plate?
is there a drop in replacement metal (mono) available?
Asked by Anonymous on December 5th, 2015.
December 9th, 2015
Staff MemberTop Contributor
This is the genuine Marshall product designed for use in their cabinets. I would suggest using the measurements provided on this page to compare them to your existing plate for compatibility.In terms of genuine Marshall products the standard Mono plate part number would be S-H801 though this is not metal.
1 answers
I have a Marshall AVT 412A speaker cab. Can I make this stereo?
Asked by Anonymous on January 27th, 2016.
January 27th, 2016
Staff MemberTop Contributor
Depending on your speaker impedance and wiring scheme the cab could definitely be run stereo. In terms of this jack plate's compatibility with the cab I wouldn't be sure.
1 answers
could I wire 2 x 4ohm speakers to stereo at a 4ohm load per speaker and then have the mono chanel have an 8ohm load wired in a series?
Asked by Anonymous on May 23rd, 2016.
May 24th, 2016
Staff MemberTop Contributor
This is more than likely possible since the jackplate doesn't have any active components but the markings on the plate itself won't have the correct impedance.
1 answers
Will this fit a 1936 2x12 cab?
Asked by Anonymous on November 30th, 2016.
Hi the best thing to do is measure your existing cab to insure a proper fit. This jack plate has a center-to-center width of 4.09" and a center-to-center length of 2.09".
1 answers
Using a 16-ohm cabinet rated at 100 watts, if I use this jack and wire it according to instructions provided (16-ohm Stereo), how is the power split between left and right channels with the original 16-ohm, 25-watt speakers?
Asked by Anonymous on December 16th, 2016.
Since this is a passive circuit, the power will be split in the same way your amp splits it. Typically this is split evenly.
1 answers
If I use this with a 2x12 cabinet with two 8 ohm speakers, I should end up with either 4 or 16 ohm mono or switched to 2 x 8ohm stereo, correct?
Asked by Anonymous on December 22nd, 2016.
Yes, this is correct.
1 answers
How would i wire a 6x12 to this?
Asked by Anonymous on April 14th, 2017.
This question would be best answered by Marshall. Please contact us directly and we can put you in contact with our rep.
1 answers
Used this with 2 8ohms speakers what is the mono ohmage?
Asked by Anonymous on April 15th, 2017.
You would have one speaker working in mono at 8ohms.
1 answers
Will this work on a JCM 900 Lead 1960?
Asked by Anonymous on December 10th, 2017.
Functionally it should work with any cab as long as it physically fits. You will want to compare the dimensions in the spec sheet above with your cab to insure a proper fit.
1 answers
Does this come with mounting screws?
Asked by Anonymous on April 28th, 2018.
This is just for the jack plate.
1 answers
Can I use this jack plate in my 4x12 1960av?
Asked by Anonymous on December 9th, 2018.
December 10th, 2018
Staff Member
Functionally it should work with any cab as long as it physically fits. You will want to compare the dimensions in the spec sheet above with your cab to insure a proper fit.
1 answers
Hey, I have a 4x12 orange crunch marshall slant face speaker box and broke the Jack plate. My original plate has 280/W rms. The replacement has 300/rms. Will this make a difference if I replace it with the 300 rms plate?
Asked by Anonymous on May 16th, 2020.
May 19th, 2020
Staff Member
This just connects to the speakers. Marshall 412 cabinets often use 75W speakers so the 4 add up to 300W. Your speakers must be 70W making it a total of 280W. As long as you are not exceeding the rating of your speakers then you should be good.
1 answers
Does this come with the cables or is this just the back plate?
Asked by paul64 on July 1st, 2020.
July 2nd, 2020
Staff Member
Speaker cables are not included with this plate.
0 answers
I got a Carvin cabinet with 4X12 Celestion Creamback 75watts 16 ohm .I want to adapt this Marshall jack plate to get in the stereo mode 8 ohm in the left jack and 8 ohm in right jack . I see the there two pairs of red wire and black .Do I have to connect one side of the red ( +) black ( - ) cables with a pair of my Celestion wrired in parralel and the same goes to the other side., to get the 8 ohm impedance in both channels.
Asked by Anonymous on February 26th, 2020.
No answers yet!
Product Reviews
Just wanted to replace this jack plate. Old one was all beat up. Glad i replaced it cabinet looks brand new now. Came in a timley manner and i would have no problem buying from amplified parts again. They carry all original marshall stuff. Hats off to you amplified parts.
The Marshall 1960A Cabinet I was using had a lot of miles on it. The Jack Plate was cracked at the edge. I plugged in my full stack and the bottom cabinet wasn't working. Without even testing it with a multi-meter, I bought the new Jack Plate from Amplified Parts, installed it the cabinet and VOILA!! It worked perfectly! Thank you Amplified Parts for a righteous product! Play ON!!