ive got one of these new direct drive, 3 RCA headunits and was wondering if it'd be any good putting a sub in the size of the stock one on the parcel shelf.

just need to know
-yay or nay
-what size
-power output

Cheers

depends what your after really....u can go an 8" free air sub like the stock one....again comes down to ya budget and what you are expecting to get out of this....obviously since your considering a small parcel shelf mounted sub crazy big bass isnt your aim.....a good 8" tho will produce a very nice clear variety of tight punchy bass notes that will suit a good budget semi SQ aimed setup.

So you can do this if u want....does save quite a bit of money since your not having to get a sub box (unless u went enclosed 8" woofer and had a small custom fibreglass enclosure made for it...could even up to a 10" woofer then but yeh)

Aside from that you need to consider how u intend to power it....the costs involved with lengths of cab,ling since u werent running a boot mounted battery - I remeber you were looking at budget Jaycar 4 channel amps etc....depending what you choose and if all 4 speakers were going to be connected then you will need a seperate amp for the sub etc.....unless you havent already purchased the 4 channel and should look at a better 5 channel (5th channel on most 5 ch amplifiers is used as a dedicated subwoofer channel - normally has a much larger peak n nominal output to the other 4 channels)

Few points to ponder over anyway mate

yeah, im not really crazy on throwing money at a sound system a hole lot. as much as i like noise i cant justify the cost.

besides kev, your hung like a horse compaired to anything i'd even dream of

lol ok mate ... um hehe well what r u after then just a nice budget free-air 8" sub.... what were your thoughts on amping it ? ... if u hadnt already purcahsed that 4 ch...u may wanna look at either a 5 ch or cheaper mono block amplifier

Find a wrecked Ghia and pull the amp and sub out

And put some sort of spacer in cause the sub rattles the parcel shelf like a b**ch

*cough* extreme dynamat speaker dampening maybe with some felt underlay

Tell me more!

Well not sure on Australian pricing....im trying to see thru a contact how much I can source Dynamat product for but US pricing goes as follows for this purpose.

Dynamat Original Speaker Kit
Part Number: # 10115
Contents: (2) 10"x10" (254mm x 254mm) pieces of Dynamat Original
Price: $19.00 US Retail

Dynamat Xtreme Speaker Kit
Part Number: # 10415
Contents: (2) 10"x10" (254mm x 254mm) pieces of Dynamat Xtreme
Price: $25.00 US Retail

Each kit contains two 10" x 10" pieces of Dynamat Xtreme to be used when mounting your speaker to a metal baffle like a car door or rear shelf.

For pics see here

http://www.dynamat.com/products_car_audio_speaker_kit.html