An Eminence AlphaA sticker covers the small rear motor structure of the woofer which features a vented pole piece. Eminence recommends the AlphaA driver for professional audio and bass guitar applications as a woofer in a vented or sealed enclosure. I’m thinking i may try a H-frame on the two 15s in the next couple weeks. The 15″ woofer is built around a black pressed steel basket. You may need to measure it acoustically. The relative 2-dimentionalness of them keeps them ‘small’ in the room.
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Thanks Glen slpha-15a your nice detailed reply. Logged Guy 13 Restricted Posts: Anyway, I’m a newbie at any type of speaker building and am also interested in building a H frame sub using 15 inch driver s.
Hello, I’ve started to plan a new set-up that uses some of the comments above and a few ideas others are working with as well. I absoutely love the way your setup looks! The woofer connector alpna-15a are lightweight and do not seem well suited to repeated and heavy use with spade connectors.
Eminence – AlphaA – 15″ Driver
That would keep the front nice and clean. If you can emiennce an impulse response then you can find the delay of the impulse from each driver to the microphone, and figure out the difference. The 15″ woofer is built around a black pressed steel basket. I just caught this and wanted to compliment you on your speakers.
The pair of Eminence AlphaA woofers measured very close to one another. Eminenxe depends on the crossover frequency between the two drivers. That would make the front appear even cleaner to my eyes and help acoustically. If you did actually have to design a crossover for it, do you have a program that helps determine the values that are used in the crossover?
I went to this setup a year ago and never looked back! Rudolf Logged Print Pages: The weight of the small ferrite magnet is noted as g 25 oz. The Eminence AlphaA is a mm 15″ diameter paper cone woofer. Visaton B and 2x Eminence Alpha 15A.
Visaton B and 2x Eminence Alpha 15A
Going with the H-Frame allowed me to shrink the size of the baffle enough that the overall footprint of mine is only 16″X17″. Goldwood GW – 18″ Woofer.
I was running mine active. MJK has a few suggestions relating to the quarter-wave — i’ll probably just start by mocking up a few sidewalls on the baffle i have up in my living room now The speaker surrounds are an accordion style made from treated cloth Photograph 2.
May I also know what crossover you are using?
Eminence ALPHA15A 15 Inch 200w Woofer Speaker
Dont know quite where to go next, but do have four extra Bs on hand. Do you have any guidelines or measurements that you will use when building your H frame?
Eminence – Alpha-15A – 15″ Driver
Last eminemce 31 March The woofer basket also features both a front and back sealing gaskets Photographs 2 and 3 to facilitate front or rear mounting.
This style of speaker suspension can have a very long service life. The Eminence AlphaA woofer driver comes neatly packaged in a split moulded styrofoam shell and snuggly inside a sturdy cardboard box. Figure 2 shows the eimnence impedance response of the measured pair of Eminence AlphaA woofers. I’ve been running this set-up for a while now and have really been loving it — just thought I’d share some pictures. Rudolf Full Member Posts: Guy 13 Logged aquapiranha Jr.