intentional speaker shorting?

[Etocynned]

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]

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

 

[sreten]

Hi,

Popularised by Tannoy and their 5th driver frame grounding terminal and
mentioned in : http://www.humblehomemadehifi.com/download/Humble Homemade Hifi_Solo-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]

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]

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]

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.

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

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

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]

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]

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]

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]

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 ?

 

[bear]

I think some one stated something backwards.

Most amps have the negative speaker post connected to the chassis ground and the other channel's ground.

Bridged amps do not.

Class D, no clue what they do these days... tried to not look.

_-_-bear

PS. connect the basket to ground? Can it pick up a charge from the motion of the VC??