Nothing In Particular

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Mike H
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#9946 Re: Nothing In Particular

Post by Mike H »

Ray P wrote: Thu Nov 08, 2018 5:48 pm Talking of the weekend, the next few days are going to be difficult as we have Judy's mum's funeral on Monday - emotions are running high.
Hope it goes off OK.
 
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
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Ray P
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#9947 Re: Nothing In Particular

Post by Ray P »

Cheers Mike
Sorry, I couldn't resist!
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#9948 Re: Nothing In Particular

Post by Ant »

Made some really nice progress with the big fane sealed cabs today, added a set of 4 internal braces that sit around the driver at 12 o'clock, 3, 6, and 9 o'clock.
I didn't make them holey braces as I was only going to lose about 3 litres so they are solid in order to provide other reflective surfaces to disrupt any standing waves in the box
They 120mm x 18mm x 325mm with the front edge cut at a steep angle towards the back to clear the driver and give an odd shape to try and randomise reflections in there.

I did it this way so that they would disrupt the standing waves inside the box and try to break the driver rear wave up when it reflects off the back panel. the panel resonances are also altered, making the cab more dead. Which was the original reason to do it until I thought about how to do it and what they could also do

I also changed the stuffing in the box from 200g of dacron type stuffing in the bottom of the box to 250g of wool stuffing. Just to compensate for the slight reduction of cab volume. I got another lenco on Tuesday and the box was filled with a kilo of wool fibre stuffing to protect it...... Brilliant stuff to get for nowt!

I also finally put the binding posts on instead of having a wire hanging out the back.

It has made a big difference, they are much more natural now, and oddly, the shouty tendency seems to have gone too...... Honestly I don't know why, unless the panel resonances and the reflected waves were coming back through the cone and exacerbating the rising treble response.

So I'm sat here now listening to zakhir hussein making music via Nigel g99, karmadon arm and dynavector dv20xx2, not quite believing it. I shall be a broken man when he takes it away :cry: :mrgreen: (but at least it's mine in some small way)

Didn't know they had it in them....
Also starring Rex Hamilton as Abraham Lincoln

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ed
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#9949 Re: Nothing In Particular

Post by ed »

pictures?

has this wandered from the speaker thread?

not sure from the description whether it's anywhere near the original ideas being bandied around in June?, remember this?

http://www.audio-talk.co.uk/phpBB3/view ... 2&start=60

I'm still ruminating on it, but the boss says I need to lose some stuff before I think about any more....these wimmins, they do make life trixy sometimes
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Ray P
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#9950 Re: Nothing In Particular

Post by Ray P »

Families! Grrrrrrr
Sorry, I couldn't resist!
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#9951 Re: Nothing In Particular

Post by Ant »

not that ed, did this.

ImageBloody great big speaker scribble by anthony cresswell, on Flickr

nothing special, but it had a big effect. i think its scattering the rear wave off the bracing that has had the effect, the wool fill is only about 30g more than there was before, too much and the bass goes completely to pot, and the carpet on the rear wall was already there. the cab is less resonant than it was before so theres that to factor in, but its not less resonant by much. the panels are pretty big and the sides are relatively thin at 15mm (they were chucked together out of crap i had lying around) so they were always going to be pretty resonant even with bracing
Also starring Rex Hamilton as Abraham Lincoln

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Mike H
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#9952 Re: Nothing In Particular

Post by Mike H »

Ray P wrote: Sat Nov 10, 2018 9:57 pm Families! Grrrrrrr
Oops. :(



Bloke on the Renault forums says he got a b0110cking from SWMBO 'cause he wanted to put the turbo off his car into the freezer, as an aid to bearings removal.

:lol:
 
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#9953 Re: Nothing In Particular

Post by IslandPink »

ed wrote: Sat Nov 10, 2018 9:00 pm these wimmins, they do make life trixy sometimes
Is the wife or the outside womens ? - cos you can't watch em both ....
"Once you find out ... the Circumstances ; then you can go out"
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jack
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#9954 Re: Nothing In Particular

Post by jack »

Oh! No!

Vivitur ingenio, caetera mortis erunt
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Nick
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#9955 Re: Nothing In Particular

Post by Nick »

jack wrote: Mon Nov 12, 2018 10:52 am Oh! No!

Why "Oh! No!" ?

I thought the new definition made a lot of sense and was reproducible instead of one lump of metal being "it".
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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#9956 Re: Nothing In Particular

Post by jack »

Nick wrote: Mon Nov 12, 2018 11:16 am
jack wrote: Mon Nov 12, 2018 10:52 am Oh! No!

Why "Oh! No!" ?

I thought the new definition made a lot of sense and was reproducible instead of one lump of metal being "it".
You're not American are you? It was... Irony!
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ed
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#9957 Re: Nothing In Particular

Post by ed »

maybe now we'll know the true weight of irony
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#9958 Re: Nothing In Particular

Post by jack »

Useless factoid of the day...

...within better than an 0.5% error, in a year there are 10,000,000 * pi seconds.

There. Isn't that pleasing to know.

Oh, and the corollary is that a nano-Century is very close to pi seconds...
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pre65
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#9959 Re: Nothing In Particular

Post by pre65 »

jack wrote: Tue Nov 13, 2018 6:35 am Useless factoid of the day...

...within better than an 0.5% error, in a year there are 10,000,000 pi seconds.

There. Isn't that pleasing to know.
And there is no truth in the rumour that a gentleman from Dirtford ate 25% of that total. :lol: :lol:
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#9960 Re: Nothing In Particular

Post by jack »

Can't be. Assuming you live to 94 and have 3 meals a day, that's only about 103,000 opportunities to have seconds. And if those seconds are all pi, then that's reduced again to pretty much exactly 2^15 pi-sized chunks.
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