CO8V, looks good! maybe in a MlTL?

Jacobus · 12th May 2007, 09:36 AM

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

GM · 12th May 2007, 03:07 PM

Specs?

Jacobus · 12th May 2007, 03:51 PM

Hi Greg,

here is the link to the pdf with specs

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

How are things going?

Jacob

GM · 12th May 2007, 04:39 PM

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

Jacobus · 13th May 2007, 07:26 PM

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

GM · 13th May 2007, 08:29 PM

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

Jacobus · 14th May 2007, 06:16 AM

Thanks Greg,

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

Cheers,

Jacob

Jacobus · 14th May 2007, 08:04 PM

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

Pano · 14th May 2007, 08:52 PM

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.

GM · 15th May 2007, 02:08 AM

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

12th May 2007, 09:36 AM	#1
Jacobus diyAudio Member Join Date: Feb 2005 Location: Maastricht, the Netherlands	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

12th May 2007, 03:07 PM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Specs? __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

12th May 2007, 04:39 PM	#4
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	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 __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

13th May 2007, 08:29 PM	#6
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	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 __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

14th May 2007, 08:52 PM	#9
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	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. __________________ Take the Speaker Voltage Test!


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12th May 2007, 03:51 PM	#3
Jacobus diyAudio Member Join Date: Feb 2005 Location: Maastricht, the Netherlands	Hi Greg, here is the link to the pdf with specs http://www.hempacoustics.com/CO8V_-_...heet_ready.pdf How are things going? Jacob

13th May 2007, 07:26 PM	#5
Jacobus diyAudio Member Join Date: Feb 2005 Location: Maastricht, the Netherlands	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

14th May 2007, 06:16 AM	#7
Jacobus diyAudio Member Join Date: Feb 2005 Location: Maastricht, the Netherlands	Thanks Greg, I will look into B&C, any particulair model I should take a look at? Cheers, Jacob

14th May 2007, 08:04 PM	#8
Jacobus diyAudio Member Join Date: Feb 2005 Location: Maastricht, the Netherlands	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

15th May 2007, 02:08 AM	#10
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	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 __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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