Member
Post by fishheadsoup on Sept 19, 2021 17:57:22 GMT 12
i have to face the fact that this is a project i’m just
not going to finish!
i have two cg8’s and two tweeters that stare at
me every time i go into the workshop. they taunt me.
anyone in east auckland want to use them?
can’t post a pic from my
phone that can see. i can email or text you a photo if you are interested.
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Post by michaelw on Sept 20, 2021 13:05:56 GMT 12
Guidelines on For Sale posts.
Some basic information will help seller and potential buyers:
Give a clear description
Upload a photo/s
A price
Your location
And please, no 'expressions of interest' requests thanks.
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Member
Post by fishheadsoup on Sept 20, 2021 14:18:09 GMT 12
no price, free to anyone that wants them and can pick up from howick east auckland.
i can post
photos from my antique iphone so will texto
or email anyone thats keen.
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Post by RdM on Sept 23, 2021 0:10:04 GMT 12
I used to visit a cartoonist friend now deceased who at one time had a pair of RA CG8's in medium size bookshelf cabinets, with a paper cone tweeter, I think. They actually sounded quite good in the place at the time. Later, I accumulated CG12's in large cabinets, also two different versions of CG12, but eventually sold them on.   You could create an account at imgbox.com/ and use it to paste uploaded image links here, use - copy - the BB-Code on the far right tab result after uploading. You don't have to accept the defaults for a small 100x100 thumbnail, you can choose larger, and whether comments or not, and in a new gallery or an existing one. It will remember you and your preferences, for free. Or upload photos to TradeMe. You can transfer photos from even an ancient iPhone (mine is a 4S!) via USB to a PC, via iTunes or a 3rd party app, whether Windows Mac or Linux. Learn how.
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Pundit
Post by peter0c on Sept 23, 2021 12:56:49 GMT 12
The Thiele Small parameters for the CG8 (and the CG8T which I think has a whizzer cone) are Q.56, fs 50 hz and Vas 1.819 cub ft. The on-line DIY calculator suggests three possible cabinet designs. The first a sealed box of 3 cubic feet has a f3 of 63hz which is rather high for such a large cabinet so is not really sensible. A ported cabinet of 5.37 cubic feet (about Tannoy MG sized) has a nice low f3 of 31hz and this would be of interest to anyone who either has or can accommodate such a large cabinet. The best compromise I think is a Butterworth B4 alignment which has a cabinet of 3.28 cubic feet tuned by a 3 inch diameter port 2.22 inches long giving an f3 of 36hz.
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Member
Post by fishheadsoup on Sept 23, 2021 15:48:49 GMT 12
i have a pretty ancient iphone and just using it is a pain for me. my imac is down at the moment but ahould be back online in about 6 hours! will try to post photos then.
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Post by RdM on Sept 23, 2021 19:10:02 GMT 12
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Pundit
Post by peter0c on Sept 23, 2021 22:28:23 GMT 12
Yes DYIaudioandvideo which also has the Butterworth B4 alignment. Butterworth works well for low Q speakers like Tannoy. Otherwise they are all the same. I generally add 30% volume to the Thiele Small calculation and tune accordingly.
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Member
Post by fishheadsoup on Sept 24, 2021 15:43:46 GMT 12
www.trademe.co.nz/a/listing/3276276128ok getting my iMac back online was a mission. thank you peter and RdM for your input much appreciated. i have put in a link to a trademe ad above as it was the easiest way to get photos on!
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