Originally Posted by Keith Ferguson
So at the current state of prices on drivers, what is the best bang for the buck? I will be doing a cantilever single mini platform for a 4 seat single row couch with an Inuke 3000dsp as an amp. what is the general consensus on best bang for the buck? I was leaning towards 4 12" JBLs but haven't seen them go on sale. please share your thoughts on 3 vs 4 drivers or 12" vs 15"
Hey Keith.....good question. Wal-mart on-line is selling the JBL's at $49.99 each right now. Even at that price it's hard to beat the shaker potential of 3 or 4 of these when comparing dollars per shaker potential to other drivers including the 15" and 18" BOSS drivers other members have tried.
What I mean by shaker potential, just take the moving mass of the driver (MMS) and multiply by the Xmax of the driver. That product is what I call the shaker potential for 1 driver. So, if you wanted to compared different shaker potentials of different drivers that will help.
Then, just divide the shaker potential by the price of the driver to get a shaker potential comparison per dollar spent.
Using the above comparison method, you can start to make informed decisions about your cantilever BOSS design and how much you want to spend for the added shaker potential. That shaker potential can be added through multiple JBL's, multiple 15's, multiple 18's, etc. The cost of each approach will be different depending on what kind of prices you can get for each of the driver types, but the end experience will be roughly the same if the shaker potential is the same.
For example, with a cantilever BOSS like yours, you have flexibility of using bigger drivers if desired. if the shaker potential of 4 JBL's is the same as the shaker potential of 2 15's, but the 2 15's cost 25% more than the 4 JBL's, I would go with the 4 JBL's. And, vice-versa...if the 2 15's are lower cost than the 4 JBL's, then I'd go with the 2 15's.
The other thing to consider is the power.....If someone didn't want to buy another amplifier but rather use a spare stereo amplifier on hand, I'd probably lean towards the Dayton 15's in a cantilever design since they only use 20-30 watts each compared to the JBL's 80-100 watts each. It wouldn't make sense to use the 4 JBL's and save $50 on the drivers when you have to buy an Behringer amp for $250 to power them. It would make more sense to spend a bit more on the 15 drivers and use the spare amplifier you have on hand.
Lots of different options and it really depends on your goals....if you want to have DSP capability and want to buy a Behringer anyway, then it's probably just a driver decision at that point and you don't have to worry about the power differences since you'll have power on tap for either driver decision.
Also, one disclaimer for all the above.....make sure your BOSS platform is rigid. If only using 1 layer of 3/4" plywood, then I wouldn't recommend more than 4 12" openings and no more than 3 15" openings in it. If you need more openings, then I'd recommend going with 2 layers of 3/4" plywood screwed and glued. Also, follow the special instructions for placement of the isolators in a cantilever design as prescribed in the hyperlink in Post 29.