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I heard about such a tweak a few years ago. The archives don't really mention an experience with such a tweak.Anyone have any experience with that tweak. Also, what did you ground it to?
Follow Ups:
JMR allows grounding of the bass driver basket. The main benefit, from what I've read, is to allow release of built-up static that can occur with temp and humidity changes.
New Offrandes don't have them. I think the fact is, some speakers need it (JMR said the earlier Offie woofers built up a static charge), some don't (new ones).
Yep, I have the previous Offie's, the model before the sigs. They were a demo pair at a shop in Brussels, I came across last autumn. The shop owner said much the same thing when I asked about the grounding posts.Btw, I fell in love with them at first listen. They replaced a pair of tweaked maggie 2.5R's I had for 18 years, with no regrets.
You would have copper ground rods driven right through your living room floors as close to your stuff as possible.
You would then use as wide and as short a copper braid as possible to connect it.This is what us Ham's sometimes do ....
Dont forget, it must cost more than your car, or it's not "audiophile". :P
Everything would be on a DC batteryNot real world yet
Copper? I used bronze grounding rods for my old ham shack and copper strapping for the connection. Copper braid has a nasty habit of burning up with a strong current when used for grounding (I've seen examples in a couple of failed installs first hand where it looked like it exploded) so its only good, wide strapping for me.This is a good topic, I've been curious just what the sonic effects are of grounding a driver basket.
........use 6 nines single crystal copper GND rods, cryogenically treated and then driven into the ground by 2 lustfull oriental virgins with a 10lb. sledge that has been blessed by Himalayan monks of which are virgins themselves.The ground of which the rod is driven is 100% virgin islands sand that has a 20% mixture of peat moss and 10% goats blood.
)
WHERE should the basket be grounded to?Kenster said tot he system ground, but I am not sure where that is. I have 4 dedicated runs from the AC box.
Matt says to the - on the crossover, but I am triamping.
"Kenster said tot he system ground, but I am not sure where that is. I have 4 dedicated runs from the AC box."I am refering to your dwellings electrical system Earth GND. That would be the round connection on the outlet beneath the 2 vertical slots.
U could also attach the basket GND to any component chassis that utilizes a 3 prong power cord.
Cheers,
I had planned to ground it on the amp chassis, but wasn't that sure.
Just because a component, such as an amp, uses a 3-prong power cord does not automatically mean the chassis is connected to ground. For instance, I have a B&K power amp, and although it uses a 3-prong detachable cord, the Earth grond wire is not connected to anything. This may be a rare exception, but it's never a bad idea to understand how your stuff is wired.
Thanks. My old carver was that way.My Pass' manual make a big deal about lifitng the ground, but I'll check just to make sure.
U R correct and a quick check with a DMM will be all that is needed although it is rare that the chassis is not connected when a 3 prong plug is utilized.
I have several components to my system grounded that aren't normal (like a TT) & in each case the result is similar & beneficial.I just purchased Hawthorne SI OB drivers. I've taken a single strand of CAT5 and taped it to the stamped basket & ran the other bare end into the Neg post of the X-over's speaker binding posts.
Do this!!!!!! its incredible. I've read small drivers may not benefit...i'd try them all though. Sub owners must try this!!!
I have 2 Lovan racks that are also grounded. My TV sits on one & the gear sits on the other. In between the 2 is my amp sitting on a board on the carpet. I have NO clue why this works, but grounding the TV rack brings about an audible loss in background noise. Its GRND wire is attached to an outlet on a difft circuit. My gear's rack wire is attached to the phono preamp grnd lug.
I've also grounded the 2 transformers inside my TVC preamp & those run to the phono grnd as well.
the effect is almost like when you damp something properly - the bass gets better, the rest of the presentation 'falls in line' so to speak.
Hi Matt,"I just purchased Hawthorne SI OB drivers. I've taken a single strand of CAT5 and taped it to the stamped basket & ran the other bare end into the Neg post of the X-over's speaker binding posts.
Do this!!!!!! its incredible. I've read small drivers may not benefit...i'd try them all though. Sub owners must try this!!!"
Could U report as to what differences U heard when this was implemented?
I know about the component rack GND'ing as I tired it on your recommendation awhile back and it does work....subtle but it does lower the noise floor!
Cheers,
No matter what I ground, be it the 15" woofer baskets, either of my 2 racks, or the 2 transofmers in my TVC the result is identical and audible each time...lowered noise floor. at least that's what i'd call it, no clue what's really going on.the 'background' noise disappears further into the abyss, the bass becomes louder, sharper and more fun while the rest of the presentation takes a big sign of relief & lets the music leap forth.
again, i have NO idea why this works, but it does.
I have been attaching some of the GRND wires directly to the Neutral plug-in on unused outlets, not the ground plug, rather than loading all of them onto the lug on my phono pramp.
In terms of the Hawthorne driver grounding, i learned of this on their forum. attaching the bare end to the Neg speaker binding post on the x-over is the right way to do it there.... i keep the other bare end in place on the frame with a piece of funky japanese duct tape.
NOW, i must dish since we're on the subject. A while back when i 1st grounded my Lovan racks I also attached to a wire to my window frames - my L/R has 19' feet of floor-to-ceiling glass & the frames are aluminum store front types. With the GRND wire going directly into an unused outlet on the same circuit as my gear, a high pitched tone overcame the sound. My system is real warm so its easy to know when this happens. Did this mean i was putting too much garbage into the circuit?? dunno. but i won't try grounding 100' linear feet of aluminum again. I had visions of a massive farraday cage!!!
"The internal wiring and crossover are shielded, it turns out, and you can connect a ground wire to the speaker to drain off electrostatic charges from the woofer cones."-UHF #74
That reminds me of the antistatic rubber tape some people have attached to their cars in Europe. The rubber tape is mounted to the chassis of the car and suppose touch the street and so lead static away from the car. If you believe in it - it may help.But rubber can not pass on electricity nor coud the pavement take up the electricity or static.
Same goes with your idea of grounding the speaker basket.
shock the crap out of me when i exited the car.i grabbed a piece of speaker wire and screwed it to the chassis and bared the other end so that it would drag on the pavement and from the day i did that i never again recieved a shock from that car.
must have had cloth seats.When you drag your butt on the seat to exit the vehicle (which is virtually the only way to exit), you can build up quite a charge. Since the metal chassis/body of the car is not well connected to ground, you'd get a shock when you touch it after building up a charge. As you discovered, you can eliminate this shock by connecting the car's chassis to ground. You could also have eliminated it by making contact with a metal portion of the car while you exited (when you are making contact during your exit, the connection point to ground is thru your shoes, and thus a high impedance path, and no shock - the skin of your hand to the metal presents much lower impedance and therefore zap!).
I suspect the rubber straps mentioned above are somehow metalicised or otherwise conductive - that would make them effective. I see these used in the States as well.
Try a search in the Tweak Asylum as there has been talk of it over there in the past.I know Tannoy has a feature on their upper end/top of the line coaxial speakers that one can run a seperate GND wire to the coaxial driver basket and some report a subtle change in what can be described as a "lowering of the noise floor".
I have toyed with this idea for sometime but wonder just how effective it would be on a woofer basket.
My speakers are 3 ways with a seperate bass bin and I am apprehensive to drill holes in my cabinets, add a seperate binding post, run a seperate wire to the woofer basket only to find it didn't make a bit of difference. Seems that Coaxial drivers would benefit the most since the tweeter is integral to the woofer.
The basket GND would be connected to the Earth GND of your electrical system.
Cheers,
Tannoys Prestige range has got this feature. They recommend the use of shielded speaker cable (or to run a seperate drain wire) with the shielding connected to the ground post on the speaker side and the amp enclosure or gnd post at the other end. It is supposed to increase midrange clarity by blocking out rf interference.
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