On Tue, 04 Nov 2003 07:43:10 GMT, (Stewart
Pinkerton) wrote:

Note that they ran in parallel for some time through the '80s, ProAc
being the 'upmarket' end of the same product range, made in the same
factory in Thirsk Road, Borehamwood. Celefs were perhaps best known
for their resistive port loading, using lots of drinking straws
stuffed into the port to increase viscous drag. They used KEF and
Audax drivers.

I'm in front of a pair of ProAc Studio 2s which have the drinking
straw attachment. I must look for the right tweeters some day - I've
replaced both several times with whatever fitted the hole, from
Maplins :-) They still sound pretty good with the wrong hf units.