I just purchased some used Kustom KPC10M
speakers for casual use at our family BBQ's, get togethers, etc. They will be used in lieu of larger PA speakers I have for ease of setup (and back strain).
I am upgrading the original 60 watt drivers with these
from PE, now on order. Questions:
1. I noticed that all three PA speaker models I have had the pleasure of disassembling (these Kustom, Sonic 15" 3 way, Yamaha BR-15) all run the woofers full range. Is this typical in PA speakers? It seems the HF drivers are typically protected by a crossover but the LF drivers run unrestricted.
2. Do the same "rules of the road" apply for PA speakers as subs (e.g., box tuning, use an hpf at box tuning if ported, etc.)? Do I need to worry about the new drivers unloading and bottoming out? The cabinets are "ported".....two small ports (by memory) about 1.5"x3" deep. The old Kustom drivers looked to be very light duty compared to the PE drivers on order, and have a much higher Fs. Should I try to calculate the box tuning and adjust it to the new (lower) drivers' capabilities? If need be, I can convert them to sealed boxes, but would probably lose a lot of output. I know PA drivers are built for punishment to some degree........
3. The old HF horns seem to work fine, and they have a single order crossover (cap). If I find better hf horns to replace the existing ones as bolt-in, do I need to be critical about crossover frequency, or just protecting the driver? Can you mix/match drivers at will with good results?
These never will be for critical listening, and I know there is much more "forgiven" for PA systems, I just want to get the most I can out of the enclosures in hand, budget in mind.....I will be installing lining and stuffing as well.