Advice on DIY Sub Components (1 Viewer)

[Anthony AC]

G'day people,

I am wanting to undertake a DIY sub project and have sourced the following main components. I would appreciate your thoughts on the amp and driver I have chosen. Please note that I am coming from a commercial 100W - 8" sub (so I would expect this to be a big step up), and have serious WAF to account for. This driver cost is roughly half the price for a Peerless XLS/12 or Adire Shiva here in Australia. Some modelling in WINISD shows, I think, pretty good expectations, but I am far from an expert.

Your thoughts on if this a worthwhile purchase (particularly for a non audiophile). Thanks.
(I also posted this in Speakers & Subwoofers, then thought this forum might be more applicable, hope this is ok)

 

[Bryan Michael]

that sub looks like a car sub to me. it might be worth to get a better amp/sub

 

[Anthony AC]

Thanks Bryan. I am curious as to why you say it "looks like a car sub"?

The T/S specs seem to model fairly well nevertheless.

Sensitivity - SPL - 1Watt @ 1 metre: 88.17
Voice Coil Resistance (Re): 3.5 Ohms
Resonant Frequency (Fs): 25.58Hz
Mechanical Q Factor (Qms): 3.843
Electrical Q Factor (Qes): 0.458
Total Q Factor (Qts): 0.409
Equivalent Volume (Vas): 93.42 Lt
Cone Area: 0.049 Sq m
Xmax: 10.5mm

And I appreciate the fact that you can buy better, but unfortunately for me that comes at a price.

 

[Ashley Carr]

Being an employee of Jaycar, I'd say you'd be better off getting the 12" 4 Ohm Carbon Fibre woofer. It's cheaper, is more efficient (93dB), and IMO sounds better. Depends on what sort of cabinet you're going to use though.

IIRC Whatmough used to make a sub called the Typhoon using the Carbon fibre driver and the amp you mentioned, in a vented cabinet. The review I read was very favourable. But looking at the website, that sub has been replaced by a newer model.

Edit: Just out of curiosity, who is the Oz distributor for the Peerless sub?

 

[Isaac C]

The C12 (CS2246) woofer might be more efficient, but it is severely limited by its Xmax. The 12XL (CS2272) can play ~6dB louder thanks to its higher Xmax. (An excursion/power-limited graph should verify this). A net enclosure volume of 0.1m^3 tuned to 22Hz should be fine for either subwoofer.

Save a bit more and purchase a higher rated amp. This way your upgrade options in the near future are cheaper as you'd only need to replace the XL12 (or C12) Jaycar sub with something better such as a Tempest.

Edit: Just out of curiosity, who is the Oz distributor for the Peerless sub?

WES Components is one of possibly more distributors.



Isaac

 

[Anthony AC]

Thanks for the responses guys. Isaac, so essentially you're indicating that it should work reasonably well (for the price).

I have modelled in WINISD with a 105L enclosure tuned to 23.5Hz, with 2 x 82mm vents (485mm long) giving -3db @ 23.0Hz. The port air velocity is less than 17m/s, but the excursion may be more than Xmax. How do you limit Xmax without compromising too much in other areas?

Ashley for Peerless drivers you could also try Peninsula Home Theatre or City South Electronics.

Thanks Again, Anthony