Search found 31 matches

by jHands
Wed Dec 03, 2025 9:59 pm
Forum: Omni Bass/Key/PA Speakers
Topic: Otop 8 Power Calculations
Replies: 6
Views: 413

Re: Otop 8 Power Calculations

Regardless of the amp you use, run it wide open and use the speaker processor (driverack) to balance the system by turning down the output of the processor. That way, no one can come up and spin up your amp and blow the speakers. Forgive my ignorance here, but the Driverack will be between the DJ e...
by jHands
Mon Dec 01, 2025 11:01 pm
Forum: Omni Bass/Key/PA Speakers
Topic: Otop 8 Power Calculations
Replies: 6
Views: 413

Re: Otop 8 Power Calculations

Regardless of the amp you use, run it wide open and use the speaker processor (driverack) to balance the system by turning down the output of the processor. That way, no one can come up and spin up your amp and blow the speakers. Forgive my ignorance here, but the Driverack will be between the DJ e...
by jHands
Mon Dec 01, 2025 8:12 pm
Forum: Omni Bass/Key/PA Speakers
Topic: Otop 8 Power Calculations
Replies: 6
Views: 413

Otop 8 Power Calculations

Greetings. I am going to be building a pair of Otop 8's in the near future, but I have some questions about delivering power to them before proceeding. I am aware of how to change the impedance to the amp with parallel vs series wiring the pair of 8's in the enclosure, but does the compression drive...
by jHands
Mon Dec 01, 2025 6:48 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

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.
by jHands
Thu Nov 27, 2025 2:30 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

T30W24D2010,T39W30D12,T48W24D3012,&width=650&height=250&dbmin=80&dbmax=115&fmin=20&fmax=200 I thought I would put this out there. Unfortunately, there is no chart to a 12" driver in the T30. T30 to be high passed at 35hz, T39, at 45hz, and T48 at 40hz. Thanks for postin...
by jHands
Wed Nov 26, 2025 12:09 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

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. Perhaps you can double check my math and logic here...A 300 ah 12v LIFEPO4 battery has 3840wh of capacity. Coupled to a 3...
by jHands
Wed Nov 26, 2025 3:18 am
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

Bill Fitzmaurice wrote: Tue Nov 25, 2025 9:59 pm Why you need two subs.
Would two subs in close proximity not achieve higher SPL than one?
by jHands
Wed Nov 26, 2025 3:14 am
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

jHands, I was wondering if you were planning on running on running one sub under each top...sort of a Left and Right. That's correct. T30's likely to have OT8's on top. I thought so. Have a read here..... https://billfitzmaurice.info/forum/viewtopic.php?t=398 Very informative post thank you for sha...
by jHands
Tue Nov 25, 2025 9:35 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

Bill Fitzmaurice wrote: Tue Nov 25, 2025 7:44 am 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.
Not sure what this is in response to, can you clarify?
by jHands
Mon Nov 24, 2025 11:32 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

A T48 is massive, and rules out future plans for deploying the tops and subs as a smaller standalone PA system for open deck nights, etc. jHands, I was wondering if you were planning on running on running one sub under each top...sort of a Left and Right. That's correct. T30's likely to have OT8's ...
by jHands
Mon Nov 24, 2025 11:03 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

If I decide to use car audio amplifiers to power this rig for efficiency reasons, can I still process that signal through a driverack PA2? I wouldn't see why not, but just making sure. I'm not a car audio guy, but everything I've ever seen in car amps is that they run on unbalanced signals (RCAs). ...
by jHands
Mon Nov 24, 2025 9:28 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

I just spent a few minutes looking up the miniDSP, but could find nothing at all about limiting. If that's not there, it's a no go...... Maybe I just couldn't find it. check out this little guy I found doing some digging. cheap and extremely highly regarded. https://manuals.plus/asin/B0CN1QH8YN
by jHands
Mon Nov 24, 2025 4:20 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

By the way, for anyone following, I've decided on T30's for subs. Still undecided on tops, but OT8 or OT12 seem to be the options im leaning towards, with a favor towards the 8 because of the footprint. If you can manage the size, T48 is a way better choice. Outdoors, yes, Tubas work. But, their tr...
by jHands
Mon Nov 24, 2025 4:19 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

If I decide to use car audio amplifiers to power this rig for efficiency reasons, can I still process that signal through a driverack PA2? I wouldn't see why not, but just making sure. I'm not a car audio guy, but everything I've ever seen in car amps is that they run on unbalanced signals (RCAs). ...
by jHands
Mon Nov 24, 2025 3:00 pm
Forum: Pro Sound Setup
Topic: Mobile Pro Sound Set Up
Replies: 62
Views: 4761

Re: Mobile Pro Sound Set Up

Anyone have any idea how much juice I will need to power a pair of T30s and OT8s/12s? Have you decided on drivers? Your location says PNW, is this in the USA? I am really torn between 12v vs 120v amplification. Being that this is a predominantly Offgrid project, I know that 12v is the way, minimizi...