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HiVi M8a 8" Aluminum/Magnesium Woofer
Is this speaker shielded...?
Just checking to see if this speaker is shielded and if it isafe around electronics. If it is not shielded is there a practical way to shield a speaker?
This woofer is not shielded. There really isn't a practical way for an end user to shield speakers.Many speaker manufacturers are moving away from shielded speakers due to CRT TVs (older tube type) being replaced by plasma and LCD TVs that do not require an adjacent speaker to be shielded.
Date published: 2011-02-28
M8A vs. M8N ? Same performance / specs ?
What are the differences between the HIVI M8A & M8N other than the frame ? Similar performance ? The recommended HIVI vented box volume is almost half what your woofer selection guide suggests. Can I use 1 of these drivers in a 2 cu ft. vented enclosure in a 3 way system ? I don't have a sub and am using them in a 15 x 25 ft. room. Are they too small for a full sounding system in that size room ? I have the option of using a lower quality 12 instead, but like HIVI products.
I believe these HiVi drivers are so similar that you could use either one. I do believe these could be enough to replace a subwoofer (for music of course) when used with the following cabinet.Make a ported cabinet of 1.75 cubic feet (internally). The port diameter should be 2.5" and the length should be 8.5" (I've one below that will be fine). The cabinet tuning frequency is 28 Hz, and the F3 is 30 Hz.
Date published: 2011-02-28
Recommendations for two woofers in a 2.6 ft3 enclosure
Looking to use either these or the Hi-Vi F8's in tower speaker with dual woofer configuration. Exsisting enclosure has just under 2.6 Ft3. Not sure if this is too large of volume when compaired to the Vas. of driver. Also looking to use P.E. Dayton 2Khz. 2-way X-over part# 260-140. ave not yet made a decision on Tweeters to be used...Any recommendations would be helpful.
Using a pair of the HiVi M8a 8" Aluminum/Magnesium Woofers in a tower with 2.6 cu. ft. may be a little less than optimum for these speakers, however you could compensate by adding a tuned port.The mid upper frequency is at 3khz. Any mid - tweeter that has the sound characteristics you desire should work well. These woofers will be tight and not real deep however their transient responce will be very dynamic and pure.Good Luck
Date published: 2011-09-10
Very small sealed cabinet?
How would this woofer fare in a very small sealed cabinet (.25 cubic ft)? I plan to do a 5.1 speaker setup, building all the speakers into the wall so I no longer have towers infront, shelves for the rear, and a large cube sitting in the corner all taking up space. I would like to use a pair of these 8" woofers as my subs, but having them built into the wall seriously limits the size of the cabinet.I'm not an "audiophile", and the speakers this would be replacing is a decent Sony setup with a 12" 180 watt sub that sounds just fine to me, and I've never even really pushed it. So I'm not trying to rattle any windows or anything with them. I would just like them to fairly accurately reproduce low notes and make me feel some shaking when the Death Star blows up and such.As a final thought, the reason this woofer is tops on my list as a sub is because of how visually attractive it is. I would be using either the 4" or 5" version as my mids all around, so having a matching "sub" would make for an attractive setup even when not using it. But I just don't want to spend all this money and time building enclosures inside my walls, to end up with a beautiful looking system that has a low end of 60hz.Anyone have any thoughts on this?
Hi,That size box and type will not produce low end to your liking. The F3 is 74Hz in that size closed box. Even the optimum sealed enclosure isn't going to produce Subwoofer deep bass. This is a woofer designed for 2 or 3-way speaker systems, not subwoofer duty.So, I'd strongly suggest you look for something else for your application. To be honest, you're going to be hard pressed to find anything that is going to produce the type of low end you are desiring in that size enclosure in a typical living room.A lot of car audio subwoofers are designed for smaller enclosures, but even then, sealed designs that small are going to generally require small drivers. Also, they have the cabin gain of the typical car to make up for their lack of output or low end extension in those small boxes. The living room doesn't have the same advantageous transfer function.You might want to think about an infinite baffle setup and look for subwoofers designed for that application instead.Hope this helps.
Date published: 2014-03-09