Hi there,
This will be my first attempt at building custom subwoofer and I do have 0 experience in building sub.
It will be used in a room of size ~25sq m, at small or medium listening levels. No block parties.
Would like to go for dual opposed drivers, as I do not like any external vibrations and I somehow think that 2 x 10 inch drivers will be more than enough for my needs.
Amp will be external or Hypex FA251, would like not to go for the most expensive in the lineup. In any case I will have full DSP control, external or Hypex.
Priority is a sealed one, but the woodworking is not a problem, can do the prototypes of any type: sealed, BR, slot or any other, and probably try more than one type before building final enclosure.
The approximate requirements:
-2 x 10 inch class subwoofer drivers, probably I need 2 x 2Ω or 2 x 8Ω to have final impedance of 4Ω or some other DVC combo. Affordable and available in EU, cast aluminum or plastic basket, no stamped steel - that is the only "hard" requirement.
-1 x 250W (4Ω) is a target power for both drivers, would like not to go for more.
-Reasonable all-around good driver, good price/performance ratio, probably more from home use/hifi use, no car or PA, if possible.
That is pretty much it.
Right now the go-to drivers for me are SB29SWNRX-S75-6, but they are little on the expensive side for 190EUR/driver, and have no idea if it will work with Hypex when connected in parallel on 3Ω load.
Another options:
105EUR Redcatt (BPA custom brand?) 101FHW- available in 8Ω, smaller VC, incomplete TS data
90EUR Reckhorn D-250, which I don't know if it is available in 8Ω, very scarce TS data
125EUR Ciare HS251, 2x8Ω voice coils 4x8Ω total, which makes impossible to connect it for 4Ω impedance
180EUR SBA SB29NRX75-8, which is more or less the same priced woofer-subwoofer variant of the subwoofer I selected, right?
Which drivers could you recommend including outside this list?
This will be my first attempt at building custom subwoofer and I do have 0 experience in building sub.
It will be used in a room of size ~25sq m, at small or medium listening levels. No block parties.
Would like to go for dual opposed drivers, as I do not like any external vibrations and I somehow think that 2 x 10 inch drivers will be more than enough for my needs.
Amp will be external or Hypex FA251, would like not to go for the most expensive in the lineup. In any case I will have full DSP control, external or Hypex.
Priority is a sealed one, but the woodworking is not a problem, can do the prototypes of any type: sealed, BR, slot or any other, and probably try more than one type before building final enclosure.
The approximate requirements:
-2 x 10 inch class subwoofer drivers, probably I need 2 x 2Ω or 2 x 8Ω to have final impedance of 4Ω or some other DVC combo. Affordable and available in EU, cast aluminum or plastic basket, no stamped steel - that is the only "hard" requirement.
-1 x 250W (4Ω) is a target power for both drivers, would like not to go for more.
-Reasonable all-around good driver, good price/performance ratio, probably more from home use/hifi use, no car or PA, if possible.
That is pretty much it.
Right now the go-to drivers for me are SB29SWNRX-S75-6, but they are little on the expensive side for 190EUR/driver, and have no idea if it will work with Hypex when connected in parallel on 3Ω load.
Another options:
105EUR Redcatt (BPA custom brand?) 101FHW- available in 8Ω, smaller VC, incomplete TS data
90EUR Reckhorn D-250, which I don't know if it is available in 8Ω, very scarce TS data
125EUR Ciare HS251, 2x8Ω voice coils 4x8Ω total, which makes impossible to connect it for 4Ω impedance
180EUR SBA SB29NRX75-8, which is more or less the same priced woofer-subwoofer variant of the subwoofer I selected, right?
Which drivers could you recommend including outside this list?
Last edited:
In a sealed cabinet, the impedance for a pair will be above 4Ω for most of the subwoofer range (~20-100Hz) that will demand the most power when equalized for flat response.
At only ~125 watts per driver, you'd want to use a sealed cabinet near the Vas (66L x2) to get the most low end with the least power.
No, it has a lighter cone and higher Fs, more sensitive.
Probably do better with low power than the SB29SWNRX-S75-6.
GRS 12SW-4HE will knock em out of the park for the price.
Typically back ordered for a reason.
Typically back ordered for a reason.
Yes, I would like NOT to buy FA501, and stay with FA251 range as it is much more expensive and I do not need that much power anyway. Need to think smth smart.
The drive behind this project is https://www.sigbergaudio.com/products/sigberg-audio-10d - It is from the looks powered by 26W/4558T00, which is in between SB29SWNRX and NRX. And looks closer to 20-25L internal volume. My goal is similar: not too much more in size... 66L x 2 is WAY too much 🙁
@MrKlinky , I am lost in translation: did you mean that Beyma is a good one for my project or is NOT good one?
Beyma - 44g mms, huge sensitivity, PA audio, not big linear xmax, 2"VC twice cheaper, than the others. Xlim still much smaller that of the others
26W - 100g mms, proven example with Sigberg 10D, 2"VC
SB29SWNRX -130g mms 3"VC, dedicated sub driver
NRX - 60g mms, so I would expect that it will be smth in between 26W and SB29SWNRX, 3"VC
Is my thinking of mms / Bl to give me some idea how it will perform?
Right now Beyma looks like exact candidate for lower power amp and NRX if I want proper hi-fi speaker with extra sensitivity.
Nope. I can make an excuse for PA driver, but not for stamped steel. Just not. Maybe my ears are above average, or maybe because I got some measurement mic's I am very disappointed in any parasitic resonances, and another source of it will make me wake up at night.
Only plastic and cast metal.
Last edited:
If you are OK with 20 Hz response -10dB from 100Hz (less than 1/4 as loud sounding), a small cabinet the size of the Sigberg Audio 10D (360x370x410mm, 54.6L gross) will work fine.
https://www.audioholics.com/subwoofer-reviews/sigberg-10d-sub
Art
All cheaper than the $202 SB Acoustics SB29SWNRX-S75 10" Subwoofer...with better specs.
All these drivers have cast baskets.
https://www.parts-express.com/Peerless-830452-10-XLS-Subwoofer-264-1108?quantity=1
https://www.parts-express.com/Dayto...C-Subwoofer-2-Ohm-Per-Coil-295-710?quantity=1
https://www.parts-express.com/Peerl...inum-Cone-Subwoofer-4-Ohm-264-1648?quantity=1
https://www.parts-express.com/Dayto...-Series-HF-Subwoofer-8-Ohm-295-442?quantity=1
I'd take 2 of these drivers before I'd get that $202 driver.
https://www.parts-express.com/Dayto...ofile-Subwoofer-Dual-4-Ohm-295-251?quantity=1
All these drivers have cast baskets.
https://www.parts-express.com/Peerless-830452-10-XLS-Subwoofer-264-1108?quantity=1
https://www.parts-express.com/Dayto...C-Subwoofer-2-Ohm-Per-Coil-295-710?quantity=1
https://www.parts-express.com/Peerl...inum-Cone-Subwoofer-4-Ohm-264-1648?quantity=1
https://www.parts-express.com/Dayto...-Series-HF-Subwoofer-8-Ohm-295-442?quantity=1
I'd take 2 of these drivers before I'd get that $202 driver.
https://www.parts-express.com/Dayto...ofile-Subwoofer-Dual-4-Ohm-295-251?quantity=1
Below is a subwoofer design consisting of 2x Peerless 830452 10" drivers connected in series in a 25-litre enclosure. If the amplifier can handle a low-impedance parallel connection, then using that instead of a series connection may be a viable option.
The simulation includes an 80Hz 4th-order Linkwitz-Riley low-pass filter and a 2nd-order high-pass peaking filter set to 22.0Hz with Q=2.0 (+6dB of boost). Here I have deliberately gone for a non-flat response in the passband to try and lower the –3dB point at the low-frequency end.
If we raise the frequency of the peaking filter from 22.0Hz to 28.5Hz, then we can expect the following low-frequency response. It is apparent that the peak SPL output level has been increased slightly, while the power demands have been reduced quite a lot. The peak excursion is also reduced a little bit.
The simulation includes an 80Hz 4th-order Linkwitz-Riley low-pass filter and a 2nd-order high-pass peaking filter set to 22.0Hz with Q=2.0 (+6dB of boost). Here I have deliberately gone for a non-flat response in the passband to try and lower the –3dB point at the low-frequency end.
If we raise the frequency of the peaking filter from 22.0Hz to 28.5Hz, then we can expect the following low-frequency response. It is apparent that the peak SPL output level has been increased slightly, while the power demands have been reduced quite a lot. The peak excursion is also reduced a little bit.
Just a note in case the OP isn't aware. The measurements above is outdoor measurements, so it will behave a bit different in a room. 🙂 This tuning actually matches room gain in small and medium rooms in a way that typically ends up pretty flat in-room.
This is dual 10Ds in a room of about 25m^2:
Yes, this is exactly what I want - my room is a little bigger, but such a performance is more than enough for me.
But I do not want blindly copy existing design: that is too expensive, too powerful and... not cool.
American friends forget time and time again, that we live in another market: there is no PE/Dayton in here (at reasonable prices). SBA and ScanSpeak are on-par or even cheaper than Daytons in EU.
Dayton Audio RSS265HF-8 - is 260EUR here. Perfect fit: 8/2 = 4Ohm.
That weird low profile thing is 170EUR...
@witwald Your simulations look pretty good, better than I expect from this project. My idea is to use Hypex FA251 plate amp of 1 x 250W @ 4Ohm, 1 x 130W @ 8Ohm. From your sim I see that 170Watt @~2Ohm, right? I do not see the info if those plate amps are ok at this impedance 🙁
And not sure if at 2 * 4Ohm @130W they will produce any meaningful sound before clipping. ~280W in your sim.
I am lost here. 🙁
And yes, that is a miracle! Peerless 830452 are available in EU from Digikey!!!
FA252 2 x 250W @ 4Ohm
FA251 1 x 250W @ 4Ohm
Price difference also substantial
It looks like with FA252 you can connect 2 Scan drivers to have them at 4Ohm impedance each, right?
@sigbergaudio Yes, but then I am limited to only 8Ohm drivers, right? You are using 2 x 4Ohm design in parallel or series?