Author Topic: Shocking surprise?????  (Read 3180 times)

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Offline rumblethump

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Shocking surprise?????
« on: March 30, 2000, 11:26:00 am »
I've been thinking about biamping.  The seller of my Sunn said I could daisy chain the signal by putting a chord from the bottom input and running it to another amp.  Can I do this?? My concerns are, the Sunn has a 2 prong cord which can be plugged in out of phase with the house circuit.  I usually check for proper grounding, by making sure the black wire is plugged into the large side of the outlet,and after setting up,I check to see which ground setting produces the least hum. If I daisy chain as advised, would this be a potential to do damage to either of the amps?  The other amp is a 3 prong SWR.  I was told that my sunn 2000s cant be wired for a 3 prong, is this correct?
TIA rumblethump
A World without music would be WRONG!

Offline Joe

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Shocking surprise?????
« Reply #1 on: March 30, 2000, 12:47:00 pm »
: I've been thinking about biamping.  The seller of my Sunn said I could daisy chain the signal by putting a chord from the bottom input and running it to another amp.  Can I do this?? My concerns are, the Sunn has a 2 prong cord which can be plugged in out of phase with the house circuit.  I usually check for proper grounding, by making sure the black wire is plugged into the large side of the outlet,and after setting up,I check to see which ground setting produces the least hum. If I daisy chain as advised, would this be a potential to do damage to either of the amps?  The other amp is a 3 prong SWR.  I was told that my sunn 2000s cant be wired for a 3 prong, is this correct?
: TIA rumblethump

Assuming you are using a cable with shielding grounded at both ends, you might get shocked trying to connect them.  After you connect them, both chassis would be at the same potential.  Your shock hazzard might then be from other equipment - amps, mikes, players.

Remember... the concept of daisy chaining inputs started when all amps had two prong plugs.  It will not hurt the amp, especially tube amps.

The safest approach is to get your 2000s wired for a 3 prong.  Someone is pulling your leg as it is not a major modification.  This is not for the sake of the amp, it is for your own safety.  

Depending upon the diameter of the new power cord compared to the old, the grommet hole might have to be enlarged.  A rattail file usually makes quick work of this.

The black and white wire attach internally in the same manner as the current two wire cord.  An unsolder and resolder operation.

The green center ground prong needs to be attached to the chassis.  If there isn't a handy screw or bolt to do this, a new hole might have to be drilled.  

A half-hour operation at the most.


Offline John

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Shocking surprise?????
« Reply #2 on: March 30, 2000, 02:33:00 pm »
: I've been thinking about biamping.  The seller of my Sunn said I could daisy chain the signal by putting a chord from the bottom input and running it to another amp.  Can I do this?? My concerns are, the Sunn has a 2 prong cord which can be plugged in out of phase with the house circuit.  I usually check for proper grounding, by making sure the black wire is plugged into the large side of the outlet,and after setting up,I check to see which ground setting produces the least hum. If I daisy chain as advised, would this be a potential to do damage to either of the amps?  The other amp is a 3 prong SWR.  I was told that my sunn 2000s cant be wired for a 3 prong, is this correct?
: TIA rumblethump

Everything that Joe said is true. But I'm wondering what kind of "biamping" you're talking about... The classic way to biamp something in to run one amp for the lows, and the other amp for the highs, with an active crossover between them. Some people call two amps slaved together "biamped," but it's not really the same. Does your SWR have a crossover in it? Perhaps just combining the tow different tonalities will be enough for you. But if you want it to have smoother response, and increased volume (or you're just curious), biamping might be the way to go. I ran my solarus in a quasi-biamp situation years ago just by using the tone controls as a crossover. It wasn't "hi-fi" accurate, but it sounded pretty good!


Offline rumblethump

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Shocking surprise?????
« Reply #3 on: March 30, 2000, 04:15:00 pm »
My plan, is to run from my wireless to the Sunn 2000s.  Then run a cord from the Sunn to the SWR.
The sunn would drive 1-15 with mostly low and low mids and the high and high mids equed down, the swr would drive a 2-10 for mids and highs with bottom eqed out.  Does this sound like it will work? Joe and John, thanks for your responses.  I WILL get the sunn wired for a 3 prong plug.  Kinda the best of both worlds, tube and SS?
A World without music would be WRONG!

Offline rumblethump

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Shocking surprise?????
« Reply #4 on: April 01, 2000, 09:41:00 am »
Again thanks Joe and John.  I tried the above mentioned setup yesterday and thought I would post my analysis.  It sound MUCH better just running both speakers with the SUNN 2000s. I tried every combination possible, and while the SWR has some advantages (weight, portability).  There really was no comparison in tone.  The SUNN just sounded great either with the 2-10,1-15, or both.  Consider me a complete tube convert.  I also would like to comment on tube watts compared to SS watts.  The SUNN 150 watts on about 5 volume,are louder than the SWR 300 watts wide open.  Just my observation. My amp setting are, volume 5, treble 5, bass 10, contrast 10, and deep switch off.  Anyone else care to share their settings??  Depending on which bass I'm playing, I sometimes run the contrast at 0.  Some of my basses dont need a mid boost. YMMV  


: : I've been thinking about biamping.  The seller of my Sunn said I could daisy chain the signal by putting a chord from the bottom input and running it to another amp.  Can I do this?? My concerns are, the Sunn has a 2 prong cord which can be plugged in out of phase with the house circuit.  I usually check for proper grounding, by making sure the black wire is plugged into the large side of the outlet,and after setting up,I check to see which ground setting produces the least hum. If I daisy chain as advised, would this be a potential to do damage to either of the amps?  The other amp is a 3 prong SWR.  I was told that my sunn 2000s cant be wired for a 3 prong, is this correct?
: : TIA rumblethump

: Assuming you are using a cable with shielding grounded at both ends, you might get shocked trying to connect them.  After you connect them, both chassis would be at the same potential.  Your shock hazzard might then be from other equipment - amps, mikes, players.

: Remember... the concept of daisy chaining inputs started when all amps had two prong plugs.  It will not hurt the amp, especially tube amps.

: The safest approach is to get your 2000s wired for a 3 prong.  Someone is pulling your leg as it is not a major modification.  This is not for the sake of the amp, it is for your own safety.  

: Depending upon the diameter of the new power cord compared to the old, the grommet hole might have to be enlarged.  A rattail file usually makes quick work of this.

: The black and white wire attach internally in the same manner as the current two wire cord.  An unsolder and resolder operation.

: The green center ground prong needs to be attached to the chassis.  If there isn't a handy screw or bolt to do this, a new hole might have to be drilled.  

: A half-hour operation at the most.

A World without music would be WRONG!