Mystery Knob on Back of Ed's Amp Was FET ?!?!?

  • Thread starter Thread starter Ben Waylin
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harddriver said:
I have used a 16 ohm 400 watt purely resistive load to load down my variaced 68 Ed spec Metro build in the pics earlier in the thread, I then tapped the line out using a Suhr Iso Line out from the 68's other speaker jack which then fed the low input of my 1972 Marshall Super lead (set up exactly the way Robin L described) as the power amp, the 1972 Marshall then was driving two Marshall cabs with Scumback M75 Pre-rola coned speaker but these were 65 watt's a pieces( I should have just gotten the 25 watters, but oh well, I now prefer 55HZ 12H-30's and all my Sucmbacks have been sold. All effects were up front of the 68 Plexi including the delays which are coming from two Ibanez echomachines one set to 100ms one repeat and the other set to 300-400 ms one repeat I find these old do a great job emulating my old EP3 echoplex which I had for a long time and recently sold.

Maybe the 20ohm load is more ideal but I don't recall hearing the amp as over compressed at all but you be the judge.... here is what I got. This was recorded in the room 2011 with a Zoom recorder all live recording no studio added effects at all.


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Sounds pretty close to the secret sauce to my ears. That splattiness, compression, and gain.
 
PLX said:
I'm just going off my own experiences with building resistive, then reactive loads and playing thru them and recording them - going back and listening to clips and contrasting/comparing the two types of loads.

FRFR speakers are always going to be best.

ymmv. Offer void in Montana and Maui.
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I just never heard much of it live in front of the speakers, maybe I would hear more of it mic'd and recorded I dunno. The dampening compression you hear in the above video is the auto DB dampening taking effect by the Zoom recorder to not clip the mic but you can hear the basic tone nonetheless.
 
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harddriver said:
I just never heard much of it live in front of the speakers, maybe I would hear more of it mic'd and recorder I dunno. The dampening compression you hear in the above video is the auto DB dampening taking effect by the Zoom recorder to not clip the mic but you can hear the basic tone nonetheless.
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Dave Friedman has said Ed was running a purely resistive load with teh Bradshaw rig.

:cool:
 
Kapo_Polenton said:
Sounds pretty close to the secret sauce to my ears. That splattiness, compression, and gain.
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I didn't think it sucked and was very usable at least to my ears and quite plausible as Robin L laid out on the Metro forum all those years ago.

As stated maybe the 20 ohm's is more ideal? I was running the amp on 8 ohms into the 16 ohm load with Sylvania 6ca7's and all Sylvania 12ax7A's in the preamp.
 
harddriver said:
I didn't think it sucked and was very usable at least to my ears and quite plausible as Robin L laid out on the Metro forum all those years ago.

As stated maybe the 20 ohm's is more ideal? I was running the amp on 8 ohms into the 16 ohm load with Sylvania 6ca7's and all Sylvania 12ax7A's in the preamp.
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Everyone always says an upward mismatch is OK.

My reactive load measures 20Ω DC resistance at the input jack, for what that's worth. :dunno:

There's always this gem:
https://www.rig-talk.com/forum/thre...e-arredondo-load-box-video-went-viral.210658/
 
Ossie answer my question about where he's taking the signal off the amp..

 
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