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Old 1st February 2012, 10:39 PM   #1
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Default intentional speaker shorting?

Was reading about this on a design pdf from here, Humble Homemade Hifi.


anyone tried this?

im tempted to try it with my B&W DM302's.

Any idea why it would make a difference or perhaps damage an amp?
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Old 1st February 2012, 10:40 PM   #2
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To be specific he shorted the negative terminal to the driver frame by soldering.
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Old 1st February 2012, 11:01 PM   #3
sreten is offline sreten  United Kingdom
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Hi,

Popularised by Tannoy and their 5th driver frame grounding terminal and
mentioned in : http://www.humblehomemadehifi.com/do...o-206_copy.pdf

Nothing to do with driver / speaker shorting as usually understood.

For Tannoy its just a marketing ploy, easily done inside the speaker,
and if going for an extra earthing terminal you need two, if bi-amping.

YMMV, rgds, sreten.
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Last edited by sreten; 1st February 2012 at 11:08 PM.
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Old 1st February 2012, 11:20 PM   #4
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well, since speaker baskets are usually touchable and not every amplifiers negative terminal provides ground or may be safe to touch, the whole thing isn't advisible.

Last edited by Juergen Knoop; 1st February 2012 at 11:27 PM.
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Old 3rd February 2012, 11:41 PM   #5
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try is free....fast test, just rub a bit the varnish in the hole of one front screw (woofer?) put the wire and the screw on , connect the wire in negative of the amp....

for me work not so much but is better ,as is free is a lot better
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Old 4th February 2012, 01:17 AM   #6
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Quote:
Originally Posted by sreten View Post
Popularised by Tannoy and their 5th driver frame grounding terminal
The idea predates the Tannoy 5 terminal thing, you find a lot of vintage drivers (Philips in particular) with a solder tage on the basket.

Quote:
Nothing to do with driver / speaker shorting as usually understood.
I have a feeling that it is related to groundside electron pools.

Quote:
For Tannoy its just a marketing ploy, easily done inside the speaker,
and if going for an extra earthing terminal you need two, if bi-amping.
Unless you have a typical Class D amp or any other that is a bridged balanced design, the negative terminal on the amp is not grounded.

dave
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Old 4th February 2012, 01:54 PM   #7
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by planet10 View Post
The idea predates the Tannoy 5 terminal thing, you find a lot of vintage drivers (Philips in particular) with a solder tage on the basket.



I have a feeling that it is related to groundside electron pools.



Unless you have a typical Class D amp or any other that is a bridged balanced design, the negative terminal on the amp is not grounded.

dave
Hi,

a) Is probably more do do with safety than anything else.
Probably a very good idea in old valve stuff to ground the
driver chassis, especially in lethal old valve televisions.

b) No comment. I'm not one for pseudotecnobabble.

c) I presume you connect the speakers extra ground
to the amplifiers casework if you are so inclined.

rgds, sreten.
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Old 4th February 2012, 10:42 PM   #8
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Quote:
Originally Posted by sreten View Post
c) I presume you connect the speakers extra ground
to the amplifiers casework if you are so inclined.
Which requires a dedicated terminal on the speaker.

dave
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Old 5th February 2012, 04:32 AM   #9
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The pic shows a 2" length of wire soldered from the - speaker terminal to the basket.

perhaps some second hand store electronics experimenting is in order, $20 worth of amp and speakers can be put to good use here.
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Old 5th February 2012, 05:29 PM   #10
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Quote:
Originally Posted by Etocynned View Post
The pic shows a 2" length of wire soldered from the - speaker terminal to the basket.
yes but how you thinks to fix the copper on Alu basket ?
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