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Old 7th November 2002, 12:26 PM   #1
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Default Challenge: To build the best subwoofer for around AUD$500

Id like to add a subwoofer to my home theatre set up and I was wondering if anyone could help me deciding what to buy in terms of a driver and amplifier.
Now I am new to the speaker design game but I have quite a bit of experience working with MDF.
Some points to add:
-My lounge room is 4m x 5m
-I am not particularly fussed about the size of the box
-I live in South Australia
-My budget is AUD$500-$600.

Ive got my heart set on a 12 inch driver but I am open to suggestions.

Any help will be greatly appreciated
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Old 7th November 2002, 01:00 PM   #2
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Well, as far as which sub to use...that depends on your taste. Go and listen to some in your price range. But don't worry, a less than great driver can be made to sound good if tuned to the room/style of music and power you have. It just takes some time finding out all of your wants. But for the most part, look for a driver (if it fits in your price range) with a lower Fs...maybe around 29Hz or lower. Also look for one with a cast basket, just stronger, less resonation and makes for a stonger medium for speaker component connections (ie. magnets/cones/surrounds etc,). Make sure that the cone is made of fairly strong material (less cone distortion during movement), decent surround (something that will allow the cone to move freely while still controling it etc.). As well, look at how the driver is put together...spider glue/cone glue and tinsel leeds are good and strong (not going to short against the basket).

Now for the enclosure...for me a good Vented does the trick. But if you feel "randie" build a Transmission Line...oh ya, now that's the stuff!

Please feel free to add any other coments people...I may have missed a few in driver selection.

Rino Odorico
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Old 7th November 2002, 01:21 PM   #3
BrianGT is offline BrianGT  United States
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Default Re: Challenge: To build the best subwoofer for around AUD$500

Quote:
Originally posted by viper073
Id like to add a subwoofer to my home theatre set up and I was wondering if anyone could help me deciding what to buy in terms of a driver and amplifier.
In terms of the driver, Acoustic Concepts carries the Adire Audio Tempest driver. This is the driver that I used for my sub. Here is their webpage:

http://www.acousticconcepts.com.au/Page2.htm

It is a relatively inexpensive 15" subwoofer. Here is the adire audio website with the tempest page:
http://www.adireaudio.com/diy/Drivers/Adire/tempest.htm

They also make a 12" shiva, that Acoustic Concepts might carry.

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Brian
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Old 8th November 2002, 08:48 AM   #4
Andy G is offline Andy G  Australia
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Default I assume this cost includes the sub amp !!

Jaycar carry a range of sub amps. up to 500w rms into 4ohms
WES Components go up to 200W, I think
I can't comment on quality, cos the only one I have used is the Jaycar 150w, which did a pretty good job !!

but the one I think I would really like to try is the Redgum sub amp carried by Acoustic Concepts. I don't know the cost etc but I suspect it will be "a cut above" the Jaycar and WES in both performance and cost

There is a mob in WA that carries the Hypex range.

there may also be other suppliers too.

Good Hunting, and please let us know if you find anything that's really good at a "nice" price !!!
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Old 9th November 2002, 01:40 PM   #5
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Hey thanks guys!
After reading your advice I think im leaning towards a shiva 12inch from acoustic concepts. They also do Redgum amplifiers there too (thanks Andy!) so I'll look into it.
I rang Wagner in melbourne about a 12inch peerless driver and 150 Watt amplifier, and it came in around $580 (within my budget! )
So I'll be interested to see how the Shiva will stack up in terms of price. I'll be ringing Monday so i'll let you know how i go!

Thanks again guys
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Old 9th November 2002, 02:05 PM   #6
f4ier is offline f4ier  Australia
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If memory serves me well, that particular Redgum plate amp in AC's site was AU$420 a year ago. I got my Shiva for AU$282, but it'll surely be a little more expensive now. The Shiva models better, it is louder and it plays more sub bass than the XLS, which is why I picked it
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Old 9th November 2002, 07:26 PM   #7
Andy G is offline Andy G  Australia
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Default Direct from Acoustic Concepts

Shiva $272.50 plus GST
Tempest $385.00 Plust GST
Maelstrom $765.00 plus GST
Brahma 10" $780.00 plus GST
Brahma 12" $850.00 Plus GST
Brahma 15" $995.00 plus GST
PR-15 $235.oo plus GST
AV-8 $186.00 plus GST

Redgum Amp all prices include GST.
RGSW-1 $395.00 , RGSW-2 $465.00
High Current conversion, $75.00
Freight costs Eastern States $17.00 per speaker/Redgum amp, WA and NT $24.00



Gees, hope they don't mind me posting this !!........

Just in case !!! You didn't get these prices from me, OK !!!
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Old 10th November 2002, 04:19 AM   #8
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Default Re: Direct from Acoustic Concepts

Joe Rasmussen's Critical Q Subwoofer (Vacuum State Electronics) designed in Australia uses the Jaycar Amp & the XLS woofer. To make it a bit cheaper you could get a smaller amp.

dave
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Old 11th November 2002, 11:39 AM   #9
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Wow those redgum amps were expensive!
So I think ive got my heart set on a shiva 12inch. Itll cost about $315 to get it to my door.
Now I gotta choose an amp.
Wagner (the guys who sell peerless speakers) have a 150watt amp for $289, and a 100 watt for $249.
Jaycar have a 150 watt for $289 (trade discount which I can get through work ) or a 240 watt for $335 (starting to blow the budget!)
So really this is the only decision I have left (in terms of components). Im just hoping that the amp will be powerful enough to driver the shiva. Does anyone know if the shiva is power hungry??
Any further recommendations before I take the plunge??

Thanks for your info so far.

PS once ive got the stuff, im gonna pick your brains about box designs!!
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Old 11th November 2002, 04:27 PM   #10
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Quote:
Originally posted by viper073
Im just hoping that the amp will be powerful enough to driver the shiva. Does anyone know if the shiva is power hungry??
It can certainly handle alot of power. I have used up to 2 x100 W on mine. For the last while i have been using 2 x20 W. Have yet to see if that is enuff now that i've moved the HT into a larger room.

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