OTop 12 And T30's SPL

[y2kindyz]

Hey guys, running a pair OTops with a XTi1002 and a pair of T30's with a EP2500 what kind of SPL should I be achieving?

I usually play in our church gym the size of a full basketball court with no bleachers.
I usually feel the tops are fine, but some times I wish I had more bottom end. Bass sounds good on half the court where the subs are but it starts to fade around beyond half court.

Are 2 T30's enough for a venue that size? I have the T30's limited to 35V. The T30's are loaded with the Delta 12lfa. Can I raise the V limit?

Thanks in advance,

Oscar

[Tom Smit]

No, the voltage limit is exactly where you have it.
Are you v-plating?

[y2kindyz]

Thanks for the reply Tom. No not v plated. I usually corner load them. How much will v-plating add?

[Grant Bunter]

Hey guys, running a pair OTops with a XTi1002 and a pair of T30's with a EP2500 what kind of SPL should I be achieving?

I usually play in our church gym the size of a full basketball court with no bleachers.
I usually feel the tops are fine, but some times I wish I had more bottom end. Bass sounds good on half the court where the subs are but it starts to fade around beyond half court.

Are 2 T30's enough for a venue that size? I have the T30's limited to 35V. The T30's are loaded with the Delta 12lfa. Can I raise the V limit?

Thanks in advance,

Oscar

Go to the T30's on the sales page. If your T30's are 29" wide, then you can expect +20dB at max volume of 35V, over the SPL chart at the top on that page.
Should you run them that hard in a gym? No.
Can you raise the voltage. No

V plating will add +3dB

[y2kindyz]

Thanks Grant.

The T30's are 24" wide. I will add a v-plate for the youth valentines day dance this Friday and see how much bass improves. 3db's will be nice

One more question: is there a way with the to boost bass at low volume with the DBX PA? I have heard direct radiator systems that I can feel the punch of bass at low volumes. Of course when they turn it up it sounds like crap and the bass is over powering.

Thank again

[BrentEvans]

Hey guys, running a pair OTops with a XTi1002 and a pair of T30's with a EP2500 what kind of SPL should I be achieving?

Stoopid loud.

I usually play in our church gym the size of a full basketball court with no bleachers.
I usually feel the tops are fine, but some times I wish I had more bottom end. Bass sounds good on half the court where the subs are but it starts to fade around beyond half court.

Welcome to physics. You are experiencing the inverse square law. To overcome it you need an unbroken line of 50 feet or so of subs. With T30s, that would be about 20 of them. Or... you set up delay stacks. Or you just add more subs a the front and make it CRAZEE STOOPID at the front and just STOOPID in the back.

Are 2 T30's enough for a venue that size? I have the T30's limited to 35V. The T30's are loaded with the Delta 12lfa. Can I raise the V limit?

Thanks in advance,

Oscar

2 D12 T30s aren't enough in most cases. Upgrade them to 3012s and add another pair and you'll probably be quite happy.

[commander_dan]

2 D12 T30s aren't enough in most cases. Upgrade them to 3012s and add another pair and you'll probably be quite happy.

+1 to that.

[y2kindyz]

If I build another pair of T30's will all 4 need to be loaded with the same speaker, or will 2 of a kind play well with 2 of another kind of speaker? I may want to upgrade drivers first. Then build pair later and load with D12's.

Thanks

[Bill Fitzmaurice]

will 2 of a kind play well with 2 of another kind of speaker?

Only if separately amplified and limited, and then the lesser drivers will be the weak link in the chain.

[y2kindyz]

Thank you Bill.

Going with the 3012LF I would be able to bump up Voltage to 50V.

Would that require another driverack and Amp? Or would I be able to set limiter on 1 channel to 50V for the 3012LF and reduce the output on channel 2 to 35V by backing down the gain to 35V while the other is at full gain @ 50V?

[Bruce Weldy]

Thank you Bill.

Going with the 3012LF I would be able to bump up Voltage to 50V.

Would that require another driverack and Amp? Or would I be able to set limiter on 1 channel to 50V for the 3012LF and reduce the output on channel 2 to 35V by backing down the gain to 35V while the other is at full gain @ 50V?

Interesting question.....

You can EQ each side separately, but the limiters are tied to the crossover function as in they differentiate by frequency, not channel. Maybe the PA2 has totally independent L/R funtions, but I'm pretty sure the PA,PA+, and PX won't do what you are considering.

You'll probably have to dig much deeper and just test it out......I can guarantee that you won't find any help in the manual. As much as I like the driveracks, their documentation is pretty lean.

[BrentEvans]

Thank you Bill.

Going with the 3012LF I would be able to bump up Voltage to 50V.

Would that require another driverack and Amp? Or would I be able to set limiter on 1 channel to 50V for the 3012LF and reduce the output on channel 2 to 35V by backing down the gain to 35V while the other is at full gain @ 50V?

Short answer, yes that will work. Long answer, it's really not a good idea. While it does maintain proper gain structure by having all subs hitting limit at the same time, The moment someone bumps up your trim on that channel, the deltas will probably be toast. You will get 3db more by exchanging the deltas for 3012. You will get 6db more by adding a pair of 3012 loaded cabinets, but you really need separate limiters, and 9-12 db more by adding a pair and changing out the drivers, depending on your setup. You pick.

[y2kindyz]

Thank you Brent and Bruce.

I think in theory it should work, of course I would need to test and see if it will become reality. I will be running the subs on a EP2500 or a GX5. Reason for the question would is I will probably upgrade drivers first.(first build took 9 months) Then plan on building second pair as time allows.

Will the GX5 be able to run 2 pair off of each channel in the future?

[Bruce Weldy]

Thank you Brent and Bruce.

I think in theory it should work, of course I would need to test and see if it will become reality. I will be running the subs on a EP2500 or a GX5. Reason for the question would is I will probably upgrade drivers first.(first build took 9 months) Then plan on building second pair as time allows.

Will the GX5 be able to run 2 pair off of each channel in the future?

After seeing Brent's response, I realized that I read the question wrong.....you want to set one limiter for the higher voltage, then back off the gain on the second channel....yeah, that would work, but as Brent said.....not a good idea.

The better solution would be to just set the limit at the lower value and run all four there until you can upgrade the other speakers. You will still have more output due to the extra cabs.

And no....the GX5 will not run 4 boxes with 3012LFs in 'em. Go to a GX7.

[ctmullins]

Will the GX5 be able to run 2 pair off of each channel in the future?

And no....the GX5 will not run 4 boxes with 3012LFs in 'em. Go to a GX7.

Do you really mean "2 pair" per channel? As in, four cabs on one channel and four on the other channel? That would be 2.5 ohms on each channel, and the GX5 isn't rated for less than 4 ohms per channel, so that's a bonfire of vanity there.

Or, did you mean 2 cabs on one channel and the other 2 on the other channel? That would work just fine from an impedance standpoint (5 ohms per channel). Bruce's comment is from the point of view of obtaining maximum output, though - the GX5 will run the cabs, but not up to the 3012LF max voltage. That means that you have the option of upgrading to a larger amp later, if you're willing to put up with less-than-maximum output in the meantime.