I just saw this new Dayton driver and it looks like it has an interesting set of specs. Looks useful in MLTL, Karlsonators, and WAW/FAST use in general. At $18 not a bad price. There are also 2.5in and 4in variants.
https://www.parts-express.com/pedocs/specs/295-589--dayton-audio-dma90-8-specification-sheet.pdf
Does anyone have any experience or listening impressions?
https://www.parts-express.com/pedocs/specs/295-589--dayton-audio-dma90-8-specification-sheet.pdf
Does anyone have any experience or listening impressions?
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Yes, the driver caught my attention too. Unfortunately, I’ve packed up all my drivers and baffles after moving to another apartment. A cute little HomePod provides music for me now - and I wish I could alter its bassy character but enjoy it just the same.
If my H-frame was still setup I’d build a baffle for this new Dayton and give a listen. Instead, I hope to hear positive reviews for this relatively inexpensive driver. Will it be a giant killer or simply provide another good option to the other budget full rangers from TB, Fostex, Dayton, Vifa, etc...
If my H-frame was still setup I’d build a baffle for this new Dayton and give a listen. Instead, I hope to hear positive reviews for this relatively inexpensive driver. Will it be a giant killer or simply provide another good option to the other budget full rangers from TB, Fostex, Dayton, Vifa, etc...
And it would be interesting to see how it fares against the new SBA 3" wideband driver... obviously not in the same enclosures though.
SB Acoustics :: 3” SB10PGC21-4<br><font color="#C70039">SHIPPING</font>
SB Acoustics :: 3” SB10PGC21-4<br><font color="#C70039">SHIPPING</font>
The new SB 3”has my attention as well. The upper midrange slump of the Daytons is less than encouraging.
I'm thinking maybe even a flower petal OB like what Jeshi and Mattes did in this thread might be fun to try - have a removable center plate that allows swapping and testing various 2.5in to 3.5in drivers.
EVA foam for performance speaker enclosures
The reduction in baffle diffraction effects might be interesting to hear.
EVA foam for performance speaker enclosures
The reduction in baffle diffraction effects might be interesting to hear.
I received the drivers the other day. They are well made but note that the basket is plastic and not cast aluminum as it sort of appears that way. It has a large suspension with good support. The diaphragm and dustcap are both aluminum. I am not crazy about how large the square plastic bezel appears though - the lack of the 4 corner bevels seems to really make the driver look bigger than 3.5in compared to how small a TC9FD is. OTOH, mounting them flush in a line array simply requires a long trench rebate vs 25 beveled corners per side. A snap to assemble for a line-array as they would stack touching each other and leave no gap on the corners like a TC9FD would.
Still need to listen to it though.
Still need to listen to it though.
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Hello. As this thread was closed I have published my questions in Multiway.
I apologize and bring it up again here.
I am planning to build home theater speakers using the Dayton Audio DMA90-4 and DMA90-8.
My idea is to put two DMA90-8 in parallel for the center channel and for the front and rear channels to use single DMA90-4.
I was thinking of adding a HIVI T20 tweeter to each channel.
My question is what volume would each box have, how wide would the front baffle be and if it is convenient to put the HIVI tweeter on it.
Greetings and thank you for your help.
I apologize and bring it up again here.
I am planning to build home theater speakers using the Dayton Audio DMA90-4 and DMA90-8.
My idea is to put two DMA90-8 in parallel for the center channel and for the front and rear channels to use single DMA90-4.
I was thinking of adding a HIVI T20 tweeter to each channel.
My question is what volume would each box have, how wide would the front baffle be and if it is convenient to put the HIVI tweeter on it.
Greetings and thank you for your help.
Nobody?. I see specifications on the Part Express page, where it suggests that for a ventilated box it would take 0.01ft3 (2.8 liters).
Would that net internal volume be okay?
Would that net internal volume be okay?
Product Details | |
|---|---|
| Brand | Dayton Audio |
| Model | DMA90-8 |
| Part Number | 295-589 |
| UPC | 848791005275 |
| Unit of Measure | Each |
| Weight | 0.45 |
Product Specifications | |
|---|---|
| Nominal Diameter | 3-1/2" |
| Bolt Circle Diameter | 4.29 |
| Power Handling (RMS) | 30 Watts |
| Power Handling (MAX) | 60 Watts |
| Impedance | 8Ω |
| Frequency Response | 90 to 20,000Hz |
| Sensitivity | 85.3dB 2.83V/1m |
| Voice Coil Diameter | 1" |
Thiele-Small Parameters | |
|---|---|
| Resonant Frequency (Fs) | 94.2Hz |
| DC Resistance (Re) | 7.3Ω |
| Voice Coil Inductance (Le) | 0.54mH |
| Mechanical Q (Qms) | 2.65 |
| Electromagnetic Q (Qes) | 0.73 |
| Total Q (Qts) | 0.57 |
| Compliance Equivalent Volume (Vas) | 0.05ft³ |
| Mechanical Compliance of Suspension (Cms) | 0.77mm/N |
| BL Product (BL) | 4.7T·m |
| Diaphragm Mass Inc. Airload (Mms) | 3.7g |
| Maximum Linear Excursion (Xmax) | 2.5mm |
| Surface Area of Cone (Sd) | 38.5cm² |
Materials of Construction | |
|---|---|
| Cone Material | Aluminum |
| Surround Material | Rubber |
| Voice Coil Wire Material | Copper |
| Voice Coil Former | Aluminum |
| Basket / Frame Material | Polymer |
| Magnet Material | Neodymium |
Mounting Information | |
|---|---|
| Overall Outside Diameter | 3.54" x 3.54" |
| Baffle Cutout Diameter | 3.28" |
| Depth | 1.63" |
| # Mounting Holes | 4 |
Parts Express Staff Recommended Enclosure Volume | |
|---|---|
| Sealed Volume | 0.05ft³ |
| Sealed F3 | 132Hz |
| Vented Volume | 0.1ft³ |
| Vented F3 | 65Hz |
Purely based on the published driver data & what you state you want, I'd probably say 'neither' 
Quickly going through your questions from 3 posts ago (and again, assuming the published driver data):
Quickly going through your questions from 3 posts ago (and again, assuming the published driver data):
- No reason why you can't use a pair of the 8ohm units with the HiVi tweeter for the centre once you factor a modicum of losses into the equation (acoustic & some electrical for wire & connection resistance). However, a lateral MTM is rarely a great configuration -it's popular because of the appearance & convenience but especially with higher crossover frequencies it's not ideal on the polars. As far as alignments go, & incorporating about 1/2ohm series R for typical wire loop & connection losses, you'd probably be looking at about 10 litres tuned to about 68Hz for a relatively flat vented with modest losses & damping. Since it's a centre channel & not expected to handle LF frequencies though (that's what the mains are for) I'd be more inclined to run it sealed (same Vb for a Butterworth alignment).
- For the single 4ohm, assuming vented, the published data & same wire, connection losses as above, I'd look at roughly 3.5 litres with an Fb of ~74Hz, with modest box losses & damping, giving a fairly practical, lightly damped alignment. Sealed would be a net of about 2 litres, with the same assumptions made.
- Baffle width = 'whatever you want it to be, assuming there's physical room for all you want'