audio-talk

This is what I mean by carbon fibre tow;

https://www.easycomposites.co.uk/#!/fab ... w-12k.html

In case anyone is thinking that it sounds like a bad idea to put a speaker cabinet into a vacuum bag and risk deforming, or even crushing, it - you don't. If you make the first layer flexi-mdf oversize by two or three inches you can just vacuum down the follow on layers against the first layer like ...

I believe that the Lii Audio pear-shaped speaker cabinet needs to be rigid, evidenced by its use of internal braces. The curved shape will help a lot too. If I were to build a pair I would start by using the front baffle like the keel of a boat and set up the braces like the ribs of a boat. A second...

I found a report... Wolfgang although of a similar shape these speakers are designed to be resonant, as suggested by the name 'cello'. They are open at the bottom. There's more information about the concept on Troels Gravesen's website, about halfway down this page; http://www.troelsgravesen.dk/gre...

I kind of wish I hadn't rediscovered the Fostex units as it's triggered my usual procrastination as I now seem to have several options... I'm fascinated by the pear-shaped Lii Audio design that I started a separate thread on and I now seem to have the possibility of building them and using the Foste...

Given the layout & physical vent positioning, it's a mite awkward. Is it the parallel top and bottom panels that give rise to this potential issue? If so could it be mitigated by making them non-parallel, say by 'doming' the top panel? In case it isn't obvious, I'm not a speaker theorist/design...

I hadn't seen that drawing, many thanks for the heads-up. Scott, if its of interest here's a link to the Lii Audio page with their designs for these drive units, including both sheets for this pear-section design. https://www.lii-audio.com/dt_gallery/plans-for-cabinets-crystal-10-fast-10/ Note the ...

Indeed Ray I tried two different construction techniques, bending 5mm bendy ply around a skeletal frame and translam built up CNC frames. The build thread of both with positives and negatives on both methods is here: http://www.audio-talk.co.uk/phpBB3/viewtopic.php?f=4&t=5729 Thanks Colin, I en...

I repacked the Lii units and have just had a short session with the Fostex FE167E drivers. The sound was significantly lighter in weight but then that is to be expected. First thing I noticed was that to get a 'similar' (i.e. not scientifically measured) volume I had to turn the volume up a bit. Ove...

Dave the bass wrote: ↑Wed Jan 01, 2020 6:49 pm I like their jumpers and trousers too, I wonder where they get them made? They look very well fitted.

They grow into them, just like you do with your own well-fitted garments...

That Bottlehead HPA is a bit pricey (and is only available for 120V mains users).

Scottmoose wrote: ↑Wed Jan 01, 2020 4:46 pm It was in reference to Wolfgang's comment in his post above.

Ah! I thought I had skimmed the previous content but obviously not very well!

Looks like a nice New Year walk Mark. Somerset was shrouded in a heavy 'mizzle' when I headed out on the bike earlier (30miles & >2000ft of elevation gain).

IslandPink wrote: ↑Wed Jan 01, 2020 4:31 pm I'm interested to hear if they sound good on vocals...

Very good in spite of the limitations of what's driving them.

I'm planning to hook up the Fostex 167's later and I'm expecting them to sound a lot 'lighter'.

ed wrote: ↑Wed Jan 01, 2020 1:31 pm I can dig out some photos if interested.

It's alway interesting to learn how people problem solve Ed so, yes do share...