With those drivers, there should still be some strips of wood between the drivers. Be mindful of the terminals when installing the, if you are surface mounting them. If you are back mounting, use a 1/4" roundover, or lightly sand so as to not make the strips too thin.
MissileCrisis wrote: What disadvantage would there be to spacing them out a little?
Bringing them closer reduces the comb filtering between drivers.
MissileCrisis wrote: Also, how can I calculate total power handling based on woofer and tweeter power handling? I'm pretty sure I won't be putting more than 20 watts total into it (for fear of loss of hearing) but I would like to hear an opinion as to what I could safely put into it and not run out of steam. Woofer rating is 20 W rms (assuming that they are talking about thermal limit) tweeter is 35 W rms.
This depends on wiring. When you wire speakers in series, it halves the voltage to each driver. Follow the wiring diagram in the plans. The drivers will complain if you over-do it, as will your ears.
MissileCrisis wrote: Woofer rating is 20 W rms (assuming that they are talking about thermal limit) tweeter is 35 W rms. That basically means I'm limited in the LF section right (9 tweeters to 6 woofers)? My mindset is put less than 80 watts per side into them and you won't have to worry or max around 120 watts with a HP of 100 Hz. I'm not expecting them to fill a huge room so I feel like I'll have more than adequate volume.
The woofer section requires more power to produce the lower frequencies. But, with 6 drivers handling the load, it should be no problem. Follow the plans, and you will be ecstatic with the results. SLA are smooth and effortless with little or no EQ.
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice