CO8V, looks good! maybe in a MlTL? - diyAudio
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Old 12th May 2007, 10:36 AM   #1
Jacobus is offline Jacobus  Netherlands
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Default CO8V, looks good! maybe in a MlTL?

Hi guys,

I'm very tempted to buy a pair of the new 8inch co-ax drivers from hemp. They look interesting albeit not cheap!

Anyway, I was wondering what kind of enclosure would work for these drivers? I was hoping for a nice deep bass from a mltl? Is there anybody that can run a sim for these drivers in a mltl enclosure?

Is there anybody here that heard these drivers?

Cheers,

Jacob
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Old 12th May 2007, 04:07 PM   #2
GM is offline GM  United States
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Specs?
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Old 12th May 2007, 04:51 PM   #3
Jacobus is offline Jacobus  Netherlands
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Hi Greg,

here is the link to the pdf with specs

http://www.hempacoustics.com/CO8V_-_...heet_ready.pdf

How are things going?

Jacob
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Old 12th May 2007, 05:39 PM   #4
GM is offline GM  United States
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Greets!

All things considered, doing OK. How about you?

Impressive looking driver, though unless driven with a high output impedance won't go low in a MLTL with any authority unless corner loaded. A BIB pipe horn OTOH will take you down into the 20s........

BTW, woofer efficiency calcs to 89.36 dB/W/m, so forget the 'pie-in-the-sky' 97 dB spec, and based on the 9 g Mms spec, Sd is only ~118.5 cm^2, way too low based on its picture, so I have to wonder how accurate all these specs are.

So, which way you want to go assuming you're still interested?

GM
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Old 13th May 2007, 08:26 PM   #5
Jacobus is offline Jacobus  Netherlands
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Hi,

Well, 2006 was a very rough year but things are going pretty good now.

mmmm, I have some doubts about the driver I have to say. So I think I will skip this idea, I was just playing around to do something with a nice co-ax driver but maybe there are others available suitable for hi-fi that are better.

cheers,

Jacob
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Old 13th May 2007, 09:29 PM   #6
GM is offline GM  United States
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Greets!

Glad you got it turned around!

B&C gets many favorable references from folks who have a clue, then there's GPA's remake of the Altec 604-8H if you have the budget/space. Adire's HE12.1 kit was the only inexpensive co-ax I liked and it pounded pretty good in a MLTL, but it's gone now.

GM
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Old 14th May 2007, 07:16 AM   #7
Jacobus is offline Jacobus  Netherlands
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Thanks Greg,

I will look into B&C, any particulair model I should take a look at?

Cheers,

Jacob
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Old 14th May 2007, 09:04 PM   #8
Jacobus is offline Jacobus  Netherlands
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Hi,

These B&C drivers look pretty interesting;



http://www.bcspeakers.com/index.php?...32&prodotto=57



http://www.bcspeakers.com/index.php?...izione_prod=52

Jacob
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Old 14th May 2007, 09:52 PM   #9
Pano is offline Pano  United States
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My contact at Hemp Acoustics says that the Coax are his favorite and what he uses at home. Don't know what the alignment is, though. I'll try to remember to ask.
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Old 15th May 2007, 03:08 AM   #10
GM is offline GM  United States
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Greets!

You're welcome!

No, not really, just that whether pro-sound and HE HIFI types talk about compression drivers, co-axes, etc., they tend to recommend B&C for excellent bang/buck.

GM
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