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-   -   intentional speaker shorting? (http://www.diyaudio.com/forums/full-range/205775-intentional-speaker-shorting.html)

Etocynned 1st February 2012 10:39 PM

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?

Etocynned 1st February 2012 10:40 PM

To be specific he shorted the negative terminal to the driver frame by soldering.

sreten 1st February 2012 11:01 PM

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.

Juergen Knoop 1st February 2012 11:20 PM

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.

nicoch58 3rd February 2012 11:41 PM

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 :)

planet10 4th February 2012 01:17 AM

Quote:

Originally Posted by sreten (Post 2887803)
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

sreten 4th February 2012 01:54 PM

Quote:

Originally Posted by planet10 (Post 2890914)
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.

planet10 4th February 2012 10:42 PM

Quote:

Originally Posted by sreten (Post 2891557)
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

Etocynned 5th February 2012 04:32 AM

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.

nicoch58 5th February 2012 05:29 PM

Quote:

Originally Posted by Etocynned (Post 2892406)
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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