Originally Posted by joebuddyguy
Cool, thanks, always wanted to try those ncore amps but they are pricey; always something for an upgrade though
Should I get the 3636 autotransformer? Looks like it has the most taps....otherwise it's the same as their newer transformer the 3654? I also need a big Cap for the compression driver for protection.....100uf big enough or too big? I'm having trouble finding information regarding the lowest crossover point the 2453H-SL can support on the 2384 horn; since the 2453H is beefier than the 2432, can it be crossed lower? Looks like JBL specs 630hz for the 4722N, but I think the actual dsp settings in the crown amps specify crossing somewhere in the 700s. Thanks for the help!
I have no experience with the JBL compression driver, but I can shed a bit of light on their suggested crossover points. Keep in mind their primary use is in the professional venue, so the crossover is typically higher, to get the most output out from the compression driver and keep out of the 'danger' zone when driven hard.
For the typical ( possibly atypical ) home user of said equipment, the x-over can be lowered if power is kept in check. If you want typical dance club levels at home, and like to crank it up to 11 with alcohol involved, you may want to keep a higher crossover point.
Every octave lower, diaphragm excursion will increase 4 x, for the same sound pressure level. 500-550 hz should be a safe bet, but you may want to do some testing with low level signals, slowly increasing the gain while watching for nasty behavior from the compression driver.
The 3636 autoformer would be my choice over a resistor pad for reducing the output of the compression driver.
Ask your doctor if DIY is right for you. Side effects of DIY may include anxiety, elevated blood pressure, lightheadedness, rapid heartbeat, skeletal muscle flaccidity, euphoria, psychological dependence, insomnia, confusion, blurred vision, implusivity, uncontrolled or repeated movements.