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cheap 4" drivers in Australia, how are these?
cheap 4" drivers in Australia, how are these?
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Old 17th March 2018, 08:24 AM   #1
tilroh is offline tilroh  Australia
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Location: Brisbane QLD
Default cheap 4" drivers in Australia, how are these?

Click the image to open in full size.

At $20/pair can, they be worth building enclosures for? I need speakers for my workshop. I might even sink to a bluetooth amp.

Here's the link.

Here's the specs:
Test Parameter Data (T/S, Thiele/Small):

Rated Impedance: 8
Power Handling: 15WRMS
Program Power (peak): 40W
Nominal Diameter: 4 Inch
Sensitivity (1m/1w/2.38v):86
Frequency Range: 85-10000Hz
Voice Coil Diameter: 25.4mm
Voice Coil Length: 8mm
Air Gap Height: 4mm
Winding Material: Cu
Magnet: 10 Oz
F0, Fs (Resonant Frequency): 88.4
Revc (D.C. Voice Coli Resistance): 8
Qms (Mechanical Quality Factor): 4.13
Qes (Electrical Quality Factor): 1.19
Qts (Total Quality Factor): 0.928
BL (Bl Factor): 4.02
Mms (Moving Mass): 6.243
Cms (Equivalent Air Volume to Cms): 519
Sd (Effective Surface Area): 7.543
Vas (Displacement Volume): 4.19
Levc (Voice Coil Inductance): 205.31
XMAX (Maximum Displacement): 2
η0 (Efficiency): 0.37%

Any advice greatly appreciated as usual.
Cheers, Mack

Last edited by tilroh; 17th March 2018 at 08:30 AM.
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Old 17th March 2018, 11:35 PM   #2
tilroh is offline tilroh  Australia
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My attempts at using online enclosure calculators for this speaker gives strange results like volume of -9.45 lts or 1.5" widths.
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Old 18th March 2018, 05:28 AM   #3
rabbitz is offline rabbitz  Australia
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Location: Newcastle, Australia
Download WinISD and have a play around. When entering driver data (new button), turn off auto calc.

It looks more like a PA mid driver as that's where they seem to specialise. Won't work in vented but will work as sealed with minimal bass.

Spend a few extra dollars for something like Vifa/Peerless TC9FD, TG9FD series if you want fullrange and there's plenty of comments and designs in this forum on those drivers.

For drivers in Oz look at:
Wagner Online Store | Wide range of products and accessories
Darcher

For a ready to use active speaker with BT for the workshop, this Edifier is good value (What Hi Fi have a review) and they have cheaper units.
R1700BT 2.0 Bluetooth Bookshelf Speaker - Edifier Australia
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Old 18th March 2018, 06:17 AM   #4
tilroh is offline tilroh  Australia
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Thanks Rabbitz. That's what I needed to know.
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Old 18th March 2018, 08:27 PM   #5
gfiandy is offline gfiandy  United Kingdom
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You can get these in AU from Newark for not much more they come with frequency response plots. http://www.farnell.com/datasheets/2364875.pdf


However if you can afford a step up I can recommend the TG9WD-10-08 from Peerless / Vifa. It is a 3 inch rather than 4 but it is extremely well designed and has a very smooth frequency response. Would make an ideal small speaker for a workshop. Looks like you might be able to get it here (but you need a login for a price) WES Components Catalogue 2017 NP
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Old 18th March 2018, 09:04 PM   #6
hollowboy is offline hollowboy  Australia
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If you want something easy and cheap for background listening, you can just pick up some wee speakers from a computer shop. Even a tiny pair of USB powered speakers will sound better than laptop or phone speakers.

This is an example only - you can probably shop locally for something similar.
Buy Logitech Z120 Stereo Speaker System | Speakers | Scorptec Computers

For drivers:

Wagner and WES are the same shop. WES is for trade, Wagner is for public.

Alternative Imports have a website, they aren't just on ebay - but it is all PA gear.

There are a few others (speakerbits, the loudspeaker kit), but the best value for you is probably Peerless @ Digikey. The TC9FD that rabbitz mentioned is available, $Aus 37 a pair.

1) Note that Digikey only stock a few models. If you search for others, tick the 'in stock' box. Non stocked gear requires a minimum order of X units + 12 weeks lead time.

2) Free delivery to Australia on orders of $60 AUD or more.
A delivery charge of $24 AUD will be billed on all orders less than $60 AUD.

...so it makes sense for you to spend another $24 on stuff, rather than spend $24 on postage.
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Old 18th March 2018, 11:42 PM   #7
Tromperie is offline Tromperie  Australia
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Check Gumtree for computer speakers and stereo systems. For less that $50 and sometimes a lot less, there are some quite reasonable speakers/systems you couldn't build at the price.
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Old 23rd March 2018, 12:18 PM   #8
tilroh is offline tilroh  Australia
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Thanks for the advice. I've ordered a Dayton SD215A-88-8 DVC woofer, and to avoid digikey shipping, I ordered 4 TC9FD18-08s.

Sources on the web suggest 5.5lt sealed boxes for the TC9FDs. I'd like to cross at 100hz if the TC9FDs will go that low. I don't know what I'll do with the other 2.

Can I simply double the volume of the single driver boxes and mount 2 drivers in each?
Would ported boxes be tolerable with a helper woofer.

I haven't started making sawdust yet so if anyone has an suggestion, let me know.
Cheers, Mack
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Old 24th March 2018, 10:43 AM   #9
tilroh is offline tilroh  Australia
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On second thought, since I've ordered 4TC9FDs, maybe I should use 2 per box.
I found a calculator.

Is there an advantage in having two identical drivers per box?
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Old 24th March 2018, 11:51 AM   #10
pandax is offline pandax  Belgium
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Maybe you should consider a 0.53x karlsonator with the 4 TC9 you just ordered ?
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