thanks.. its look nice that speaker...
but im most interested in the 8" drives from hivi... i have the small fullrange from hivi and it just sound very nice...
but im most interested in the 8" drives from hivi... i have the small fullrange from hivi and it just sound very nice...
An externally hosted image should be here but it was not working when we last tested it.
but im most interested in the 8" drives from hivi...
Those are the M8a. Browse around that forum and you will find several projects using them - WT and WTW in ported boxes as well as the big dipole where they are used as mids. Good drivers but they need to be crossed pretty low because of a resonance at about 2500 Hz. Jon crosses to the tweeter with a quasi-8th order Cauer elliptic filter at about 1250 Hz.
I built the large ported M8n's here:
http://www.htguide.com/forum/showthread.php4?t=3606&highlight=ported+designs
The M8n is extremely similar to the M8a, but the basket is stamped not cast.
Paul
http://www.htguide.com/forum/showthread.php4?t=3606&highlight=ported+designs
The M8n is extremely similar to the M8a, but the basket is stamped not cast.
Paul
paulhfx said:I built the large ported M8n's here:
http://www.htguide.com/forum/showthread.php4?t=3606&highlight=ported+designs
The M8n is extremely similar to the M8a, but the basket is stamped not cast.
Paul



Im Using the M4N along with the Tang 2" with phase plug in a .75 ft^3 ported cabnit and i am shocked at the bass extention of the little 4" driver. Im shockes that it has somthing you can almost
call punch down to 45 hz. I am a big fan of hivi now, for the price there better than vifa imho.
All the projects using the M8a detailed on HT-Guide and the links in my signature started from an article in the Sept/Oct/Nov issues of AudioXpress. The M8a-MKIV. That design is ported. And several people have built other ported versions.
We've also used the M8a drivers in several dipole designs. They are VERY good drivers for the money
Below is the original posted TM design that was detailed in AudioXpress
Below is copy made into a floorstander
Below is the M8a-MKIII it has a Focal TC120 tweeter
Below is a variant, it's ported and is using a Hales tweeter
The speakers shown below are ported
Avro Par't design dipole
An 'extreme' version of the Arvo dipole
Click on the link to see another ported MTM design.
There are 1/2 dozen or so more designs we've created using the M8a driver. But I think this is enough of a sample to see that we think it's a good driver in many applications
We've also used the M8a drivers in several dipole designs. They are VERY good drivers for the money
Below is the original posted TM design that was detailed in AudioXpress

Below is copy made into a floorstander
An externally hosted image should be here but it was not working when we last tested it.
Below is the M8a-MKIII it has a Focal TC120 tweeter
An externally hosted image should be here but it was not working when we last tested it.
Below is a variant, it's ported and is using a Hales tweeter

The speakers shown below are ported
An externally hosted image should be here but it was not working when we last tested it.
Avro Par't design dipole
An externally hosted image should be here but it was not working when we last tested it.
An 'extreme' version of the Arvo dipole
An externally hosted image should be here but it was not working when we last tested it.
Click on the link to see another ported MTM design.
There are 1/2 dozen or so more designs we've created using the M8a driver. But I think this is enough of a sample to see that we think it's a good driver in many applications
Here's a link to the important files that relate to the M8a-MKIV version Vifa XT-25 tweeter (there are other tweeters that will just drop into this design, one is the SS9800).
If you use a sub a sealed box is fine. If you're not using a sub, I recommend going ported to lower the excursion of the driver.
http://pwp.t-3.cc/ttriff/M8aArticle/
If you want all the R&D info related to the design, buy or borrow the back issues of AudioXpress.
If you use a sub a sealed box is fine. If you're not using a sub, I recommend going ported to lower the excursion of the driver.
http://pwp.t-3.cc/ttriff/M8aArticle/
If you want all the R&D info related to the design, buy or borrow the back issues of AudioXpress.
I found and uploaded a rough draft of the text only of the AudioXpress article. You can download it at THIS link.
Although incomplete since it's a rough draft and is lacking the supporting graphics, it will give you some idea of the rather exhaustive research that went into the M8a- MKIV design
Although incomplete since it's a rough draft and is lacking the supporting graphics, it will give you some idea of the rather exhaustive research that went into the M8a- MKIV design
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