Voxel - a mini-sub+

[PeterF]

Re: Voxel - a mini-sub+

Does anyone know other places where we can get this driver, maybe there are some Canadian or European shops which may have stock of this driver?

[craigk]

Re: Voxel - a mini-sub+

something to think about with these little drivers, which are absolutely amazing by the way, would be efficiency. these are some power hungry little monsters. I have 2 in an enclosure and have 240 watts going to them. I think they would like more. you need something that can truly drive them to get the best out of them. wimpy amps need not apply.

[mikec]

Re: Voxel - a mini-sub+

What would I have to change to use TB's W6-1139SI instead of the W5's you used?

Here's the numbers:
(paste into Excel and it should line up better)
TB W5-1138SMF TB W6-1139SI
Resonant Frequency (Fs) 45 Hz 38 Hz
DC Resistance (Re) 3.4 ohms 3.6 ohms
Mechanical Q (Qms) 3.56 2.65
Electromagnetic Q (Qes) 0.57 0.47
Total Q (Qts) 0.49 0.4
Compliance Equivalent Volume (Vas) 0.17 ft.³ 0.42 ft.³
Mechanical Compliance of Suspension (Cms) 0.37 mm/N 0.42 mm/N
BL Product (BL) 7.17 Tm 8.67 Tm
TmDiaphragm Mass Inc. Airload (Mms) 28.81g 39.91g
Maximum Linear Excursion (Xmax) 9.25 mm 13 mm
Surface Area of Cone (Sd) 94 cm² 140 cm²
Overall Outside Diameter 6.14" 6.95"
Baffle Cutout Diameter 4.74" 5.57"
Depth 3.67" 4.29"
OPTIMUM CABINET SIZE *
Sealed Volume 0.1 ft.³ 0.11 ft.³
86.4 cubic inches more
Sealed F3 73 Hz 81 Hz
Vented Volume 0.26 ft.³ 0.31 ft.³
Vented F3 35 Hz 46 Hz

[nrg74]

Re: Voxel - a mini-sub+

Please forgive my ignorance and short reasoning. Here it goes:
A neo magnet is much stronger and smaller than a ferrite magnet, this makes neo a better choice for drivers?

It seems that Paul has a preference for ferrite in his latest builds.... is it price/performance or something else?

[craigk]

Re: Voxel - a mini-sub+

stronger magnet should equal better speaker. I have both versions of this driver and can not tell any difference in sound quality. also the neo mag is about x2 more expensive.

[tyger23]

Re: Voxel - a mini-sub+

I thought I'd take a minute to post some pics of my finished Voxel. This is not-quite 1/2" birch ply finished with 3 coats of Enduro-Var.

I don't like unfinished edges and I wanted to also cover the nail holes, so I bought some 1/2" aluminum angle, mitered it to fit, and glued it on.

The finished product is quite nice. It's got a modern, "West Elm" kind of feel to it.

As for the sub, this thing is amazing for the bass it puts out considering the size. I wish it had a bit more sensitivity, though. 82db just isn't much, and it has a hard time keeping up with a pair of even moderately sensitive speakers.

Still a great design! Kudos, Paul!

[Paul Carmody]

Re: Voxel - a mini-sub+

Wow, angled aluminum. That's a first for me, and it looks GREAT!

What are you using to power it?

[tyger23]

Re: Voxel - a mini-sub+

Wow, angled aluminum. That's a first for me, and it looks GREAT!

What are you using to power it?

Paul, I'm using my DIY 2.1 amplifier that I designed and built (details here). It uses 2 of the TDA7492 amps, and it's got more than enough power (capable of a "real" 50W into 4-ohms in a mono load).

I reworked my amp to provide a +12dB gain difference between the stereo speakers and the sub this morning, and it's keeping up well now. I just wasn't expecting to need to provide that much gain difference in the first place (a 16x power difference). However - that's why sub amps need to have so much more power than normal stereo amps ;).

[swinginguitar]

Re: Voxel - a mini-sub+

i've come close to building one or two of these several times, but also wondered: is there a similar design/footprint that will dig just a smidge deeper?

or am i overthinking and F3 35Hz is plenty?

[Paul Carmody]

Re: Voxel - a mini-sub+

i've come close to building one or two of these several times, but also wondered: is there a similar design/footprint that will dig just a smidge deeper?

or am i overthinking and F3 35Hz is plenty?

If you can find another sub the size of a shoebox that can play below 35 Hz, build it!

[swinginguitar]

Re: Voxel - a mini-sub+

LOL point taken...

[Wolf]

Re: Voxel - a mini-sub+

LOL point taken...

Only one I know of is the W3-1876S model with 2 PR's I did a bit back. It will not take as much power or put out as much sound however. It will hit 30Hz.

Later,
Wolf

[jhollander]

Re: Voxel - a mini-sub+

New DCS160-8 and the Peerless 830946 model nice with a bit higher sensitivity.

[swinginguitar]

Re: Voxel - a mini-sub+

better question: are there any proven smallish designs out there that will play accurately (not thumpy) into the high 20s or low 30s?

[tyger23]

Re: Voxel - a mini-sub+

better question: are there any proven smallish designs out there that will play accurately (not thumpy) into the high 20s or low 30s?

Swinginguitar - I recommend that you start your question as a new thread - you're likely to get far more responses and perhaps a better solution that way. This thread is in respect to the Voxel sub, and I think it would be best to keep this thread's responses towards conversations about the Voxel.