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  1. O

    Dual rect Multi-watt strange hum

    Thank you both for your replies. The noise is not passing on the speakers. It is noticeable (and does not change in volume or anything) even when the amp is in idle state. Indeed in the mark the sound of fan is covering everything. You made me think to unplug the fan on the mark and check if...
  2. O

    Dual rect Multi-watt strange hum

    After a lot of back and forth I finally got my hands on a near mint Dual Rect multi-watt. The deal also included a set of new Mesa Boogie tubes as well as amp cover. The amp sounds excellent except a hum coming (maybe) from the right back side of the amp. This hum is constant and does not change...
  3. O

    Slaving a mark iv to jcm 800 with a loadbox (IR) captor x or suhr ir?

    Thank you all for your replies!!!! Yesterday a friend gave me to test torpedo captor x. Also, I had couple of metal power resistors 200w 8 ohm and some 4 ohms so I did some soldering to a neutrik ts 1/4 and used it as dummy load on the mark iv. I did both tests (slave out and fx send) and I...
  4. O

    Slaving a mark iv to jcm 800 with a loadbox (IR) captor x or suhr ir?

    You are absolutely right. I am trying so hard to find a way to do it with one box and I missed the obvious... :) The ir box should be connected to the amp that suppose to have the cab connected - replacing the cab itself. The dummy load box will be connected to the slaved amp. So: boogie...
  5. O

    Slaving a mark iv to jcm 800 with a loadbox (IR) captor x or suhr ir?

    Good idea with the resistor on the output of the powerbrake! I will get into it. It should be difficult to diy one. Regarding the use of one load ir box for both amps, in the manual of suhr, page 9: https://media.suhr.com/wp-content/uploads/2020/10/13163126/Reactive-Load-IR-100220.pdf show that...
  6. O

    Slaving a mark iv to jcm 800 with a loadbox (IR) captor x or suhr ir?

    Thank you very much for your reply! My goal is actually to use captor x (or suhr ir or…) for the ir and headphones so it should be connected to the speaker output of the power amp. This means that I have to use a load box just for the load on the mark iv. This is why I asked to the power brake...
  7. O

    Slaving a mark iv to jcm 800 with a loadbox (IR) captor x or suhr ir?

    This is my first post in the forum although I have been reading forums since the beginning of internet... :) I am going straight to the question for which I have not yet found a straight solution. I have a mark iv bough new in 1991 and a moded marshal jcm 800 1981 vertical with (currently) a...
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