BillFitzmaurice.info

Spritz it too, cold air is dry air.

Room sim predictions may or may not be accurate. The sub crawl is accurate.

Post your email here, substitute 'dot' for ., that way spambots can't read it. After he has it delete the post just in case.

Kick bins are a relic of 1970s tech, rendered obsolete by the introduction of true subwoofers and high xmax drivers in mains. When subs and high output mains came along all users of kick bins should have retired them. But many added the subs and high output mains while keeping the kick bins, making ...

Now to the lower end, as the main purpose will be outdoors the final rig should be good to go with two towers. For the obvious benefits, the coupling of 4 bass bins per side... Only if they're at least 50 feet apart. https://billfitzmaurice.info/forum/viewtopic.php?t=398 In terms of efficency, i li...

Check Penn Elcom.

I’m trying to calculate power needs for the OT8’s. Does the compression driver post crossover alter the impedance load on the amp? Or is it going to be a flat 4 or 16 depending on wiring? I’m targeting feeding each OT8 400 watts to be split between the 8’s. There's no such thing as flat impedance w...

How much power goes to the compression driver? It gets the same voltage, but as frequencies rise, the impedance does too....meaning the wattage at the driver is much lower than the woofer sees. Not quite. What happens is that the voltage is the same but power density decreases by 3dB per octave wit...

jHands wrote: ↑Wed Nov 26, 2025 12:09 pm If I were to switch to a single, larger sub, that can lay on its side, does the vent mouth need to face the crowd?

Bill Fitzmaurice wrote: ↑Fri Nov 21, 2025 9:32 am

jHands wrote: ↑Fri Nov 21, 2025 12:16 am With regards to the T48, can it be used horizontally?

Like any and all subwoofers it can face in any direction, so long as the horn mouth isn't blocked.

Sure, provided you have the power to drive them with. If you're using a 12v battery or two you probably don't. An E-Bike probably doesn't have the power to pull two subs either.

Why you need two subs.

There's no need to do that, as the radiation pattern of subs is 360 degrees on both the vertical and horizontal, and content below 100 Hz is the same in both the left and right channels.

Don't give your work away. Also don't rent out anything that you don't mind having destroyed. Rent your services as a DJ or live sound engineer along with your gear. A website is a must, and they're not expensive.

I stopped gigging five years ago as my drummer is no longer able to play; we've been together since 1983. Still have all my gear, just in case.

jHands wrote: ↑Fri Nov 21, 2025 12:16 am With regards to the T48, can it be used horizontally?

Like any and all subwoofers it can face in any direction, so long as the horn mouth isn't blocked.