Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email email@example.com
for a prompt reply.
HiWave BMR12 Compact 2" Full-Range Square Speaker 12W 8 Ohm
I would like to make a dipole speaker to see how they will sound. I will have 2 face forward and 2 face rear with a 45 degree null between them. I need them to be an 8 ohm load, but I am unsure how to wire them so the 2 rear facing speakers are out of phase from the front 2 (which will be in phase with the front channel speakers). Thank you for the help. I will be posting pictures of my setup when complete.
You will have to wire each pair in series and wire both pairs together in parallel with reversed polarity.
Date published: 2014-01-05
box volume and caps for 2 in parrallel
i would like to build a portable music player using 4 of these and a lepai amp running them at 4ohmwhat box volume and cap size would be best suited for this application?it will just be these without a sub so would like to go as low as they can. I presume it will be over 80hz i guess
For a pair of these I would recommend 1.6 liters or .06 cubic feet. A 1" diameter port that is 2" long will tune the enclosure to about 110 Hz.
Date published: 2014-01-31
"back wave absorbed in unit"
When these speakers were listed previously at a higher price there was a review that stated "One of the Major Benefits of this driver is that the back wave is already damped and absorbed within the unit itself. Therefore ... no cabinet is needed!" I see postings/questions about Vas and a ported cabinet so my question is weather or not the statement about the back wave by the previous reviewer is at all accurate? If it is accurate would there be any point in building a ported cabinet? Important distinctions for use in a line array.
I cannot say what they meant by that although these would work fine without a cabinet. Whether in an enclosure or not I would not expect to get much below about 200 Hz out of these.
Date published: 2014-01-30
Bipolar configuration and enclosure volume
It will affect the sound if I put these two speakers back to back and almost touching between the back of speakers (distance between back of speakers only 1.2 mm)?how much minimum enclosure volume if i will use this speakers for bipolar configuration?and how wide sound dispersion angle for each speakers?thanks
Mounting these back to back will not affect anything. Since these are only really useful above 200 Hz the enclosure size does not make any difference. Unfortunately the manufacture does not give us dispersion for these drivers although flat piston drivers are usually around 100 degrees or better.
Date published: 2013-07-25
What tuning/box size/crossover?
What would be the proper size enclosure and port size for 4 of these? All four will be in the same enclosure. Also, would it be helpful to add a 6db crossover in the form of a capacitor to limit the lows, and if so whats a cheap option for that?
I would recommend 0.1 cubic feet total which is roughly 12"x4"x6" external using 1/2" material. The port would need to be 1-1/2" in diameter and 4" long for a tuning frequency of about 100 Hz. I would recommend a 200 uF cap in series for protection.
Date published: 2013-09-29
What would be the recommended size for a sealed enclusure for 1 driver?
Whats the recommended size for a sealed enclosure for 1 driver? What is the a suggested high pass filter for these? Am keen on using two of these as L/R for a 2.1 project.
BassBox tells me 0.016 cubic feet per driver which yields and F3 of over 230 Hz.
Date published: 2013-09-05
would this setup be okay?
4 x http://www.parts-express.com/pe/showdetl.cfm?partnumber=299-2081 x http://www.parts-express.com/pe/showdetl.cfm?partnumber=299-1351 x http://www.parts-express.com/pe/showdetl.cfm?partnumber=310-308i was wondering if i should get some mid ranges instead of full range but not too sure. also the amp says 2x40W Mini Amplifier + 1x68W Sub Output. im not to sure what they mean. would it be ok is i ran the 4 speakers to one set of + and - and the sub to the other set of + and-? thanks for your time!
It's usually best to wire multiple speakers in series parallel to avoid too heavy of a load on the driving amplifier. I suggest looking up PE's on line section abut building loudspeakers and crossover components. There, you will find information about how this stuff works. Good info source.
Date published: 2014-01-05
Is an enclosure even necessary for sound quality with a speaker of this design?
This depends on how you intend to use the speaker. An enclosure may give you a bit more reach down low although I wouldn't expect much below about 200 Hz from this driver. It can reach naturally to around 150 Hz although it will only do so at lower volume levels. An enclosure may help bring those frequencies up in volume a bit.
Date published: 2013-11-22
What would happen if I used this speaker, with no filter, as the back speakers in a surround system? The amp is rated at 100 watts, but I never turn it up very loud at all.
Generally the surrounds will not produce much bass. If you are playing them full range you may have a problem with some movie passages, especially since these are so small and inefficient meaning they will have to be turned up quite a bit to hear them. i would recommend a high pass filter on the receiver set no lower than 100 Hz.
Date published: 2014-01-13
Can I wire 5 of these in series/parallel to maintain 8ohm impedance?
Unfortunately no, the only way to maintain an 8 ohm impedance is to use four. You would have to wire them all in series in order to use 5 which will yield a 40 ohm load.
Date published: 2014-01-17
I am building 2 bookshelf speakers w/ 4 of these in each, wired series/parallel. I have 200uf non-polarized capacitors to add to each driver. Where do I add them?
With the drivers wired in series/parallel, the easiest way to do this is simply to put one capacitor in line with all four, series to the positive input.
Date published: 2013-12-30