Help to build two enclosures/No parameters

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meganitro24

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Joined 2023
#1
Hello,I recently bought two speakers for a project, and now I'm trying to figure out what volume of air they need for the enclosure and what dimensions the enclosure should have, I've never made enclosures before, but I have some understanding of the parameters.Where did I buy the speakers, the manufacturer did not publish the parameters of the speakers because they were not available, so to begin with I do not have their parameters and I have to figure out how many liters of air the speakers will need.
Speaker size: 6.5 Inch
Rated Power/Peak Power: 20W RMS/120W
Box opening: 145 - 165mm
I would be grateful if you could help me determine in the first place what volume of air they need
 
#2
Greets!

Without T/S specs, your guess is as good as mine, so strongly suggest you measure them or have a local DIYer or audio repair business do it. At the very least you need Fs and I can scale off pre T/S box charts, which only go down to 8" or give you the 8" box size once I know Fs and you can experiment with using scrap wood/whatever to reduce it by ear.
 
#3
Pictures of the drivers would help tho.
If big magnets they might need smaller boxes and ViceVersa.
But that said somewhere between 12 and 30 litres might do it, but that is just guessing based on a few drivers I have played with in the past
 
#7
humm... the first speaker you asked about appears to be a closed back midrange(but when you scroll through the pictures on the site that changes so buyer beware) so the answer there is, no enclosure is required...other than a means to mount the driver.
the second driver you asked about is a car sub, so go with the largest sealed volume you can tolerate and equalize to taste.

other than that as others have already mentioned measurements are required even as simple as determining Fs would at least get you somewhere...

and if your going to use both drivers then you have to go down the x-over rabbit hole too...
 
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#10
however, I don't know what is the correct method to determine what volume of air is needed for a bass speaker, for example, or does it not necessarily have a necessary volume and is adjusted according to the frequency at which the cabinet is tuned?
I want to say if there is a certain volume by which I have to be guided to build the enclosure and if so how should I find it, or do I find it depending on the frequency that the cabinet is tuned? what would be the correct method to calculate the ideal volume of an enclosure?
 
#12
I am a beginner in this kind of thing, and I would like to know what is the best method to calculate an enclosure, depending on any volume given by the manufacturer or depending on the volume of the speaker? I'm waiting for more details about how I should proceed if you're kind
 
#14
meganitro24 said:
AIYIMA 1Pcs 6.5 Inch Midrange Bass Speaker 4 Ohm 8 Ohm 150W
Click to expand...
150 Watts in a six-inch could start a fire.

Exaggeration aside- 'most' speakers will work fine if you multiply the advertised diameter by about 1.2, cube it, that's your volume goal. Find stock shelving boards and cuts which will give that volume +/-25%.

Since the speaker is quoted in inches and I use inches, I'll example in inches. Convert all to cm and liters if you like.

6.5 * 1.2 = 7.8
7.8 ^3 = 475 cubic inches
An "eight inch" shelf board may be 7.25 actual inches. 475ci/7.25" = 65 square inches, or 8"x8", but you want off-square to avoid sounding like a cube. 7.25x8x9 may be OK. Figure your lap joints!

This works on an assumption about efficiency (also adv dia versus effective diameter). If the particular speakers are lower efficiency you get a bass boom; if higher you get taut falling bass; neither is a serious defect. If you wish, this box is good for suggesting a more/less volume for a next try, or for actually measuring the T/S parameters (I did that for a year when the Small papers came out and IMHO, life is too short).
 
#15
I think i will use that Ayima Speakers just for Midrange,i still have to think carefully how to determine a correct size of enclosure for them, anyway I have some more serious plans for the subwoofer speaker mentioned above.
I still planning to use the midrange speakers with the subwoofer speaker in the same box.Do i have to separate their spaces,to build the midrange a cabinet to separe them between bass and midrange speakers?
 
#16
meganitro24 said:
I still planning to use the midrange speakers with the subwoofer speaker in the same box.Do i have to separate their spaces,to build the midrange a cabinet to separe them between bass and midrange speakers?
Click to expand...

If the Aiyima mid/bass drivers have openings in the rear of the frame as shown in the customer photo below, then they need to be within their own smaller enclosures within the larger woofer enclosure.

1677622155082.png
 
#17
The 8 ohm version of the mid/bass driver appears to have an open-back, while the 4 ohm version appears to have a closed back. I come to that conclusion by clicking on the small images beneath the word "color" in the AliExpress blurb. The closed back version would not require a separate enclosure within the woofer enclosure.

For ease of reference, here are the parameters of the Aiyima 6.5" Woofer:

Impedance: 4 Ohm
Rated power: 50W
Frequency: 46Hz-3.2Khz
Sensitivity: 89db±3db
Voice coil diameter: 30mm
Vas: 12L
Qts: 0.4
BL: 5.4

Perhaps an accommodating expert will suggest a suitable woofer enclosure? 😉

​

 
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