Speakers have holes in their frames to attach to the cabinets. Thinking you put threaded bar through these holes with nuts on the ends and have the speakers back to back. Tightening the nuts brings the magnets together and increases the repulsive force. So the field strength is used up in trying to push the magnets apart and might not extend much past vicinity of the package.

Might work.

Many thanks all - on this last point actually I plan to strap them face-to-face to reduce the risk that the cones get damaged or misaligned.  In the end, if you buy a compete speaker unit (and I've bought far too many guitar / bass amps over the years!) they seem to get shipped with no problem. I do like the practical idea of boxing them up and then seeing if a British Standard paperclip will be attracted to it...

P.S. I did actually look up to see if there's a BS for paperclips, I'm amazed to find there isn't! There's usually one for everything... 

Let us know how you get on Andy. 

Andy Millar said:

P.S. I did actually look up to see if there's a BS for paperclips, I'm amazed to find there isn't! There's usually one for everything..

Quick, it looks like you've found a gap in the market! Submit your proposal.

oh no - please don't  - then we will have to fork out £100 or more for some hundred page tome  to read the tests needed to  see if our existing paperclips comply or not, in 5 years time only standards compliant paper clips with the right markings will be permitted,  and someone will be threatened with court action for using an old one because it could lead to a fatal accident. (I can't see how, but I'm sure someone will) We have more than enough standards as it is. Currently I have paper clips ranging from 12mm to 150mm between ends in various wire gauges in the desk beside me, and they all work just fine without any obvious signs of needing any sort of harmonisation or testing.

Mike.

oh no - please don't  - then we will have to fork out £100 or more for some hundred page tome  to read the tests needed to  see if our existing paperclips comply or not, in 5 years time only standards compliant paper clips with the right markings will be permitted,  and someone will be threatened with court action for using an old one because it could lead to a fatal accident. (I can't see how, but I'm sure someone will) We have more than enough standards as it is. Currently I have paper clips ranging from 12mm to 150mm between ends in various wire gauges in the desk beside me, and they all work just fine without any obvious signs of needing any sort of harmonisation or testing.

Mike.

Good point mapj1 ! Let's leave them well alone, unless it's to bend them to do odd little jobs they were never intended for...