Crest CC 2800 for 4x t48
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Crest CC 2800 for 4x t48
Hi,
I'm planning on building 4 titans 48.
Is there any difference on using the 3015lfa or the Lab 15?
I'm now thinking how to power them, I was thinking for a Crest cc 2800.
RMS-power (4 Ohm): 2x 965 Watt
RMS-power (8 Ohm): 2x 595 Watt
Will this be enough for 4x t48? 2 per channel.
How many watts do I need for 2 Titan's a channel?
Thanks!
I'm planning on building 4 titans 48.
Is there any difference on using the 3015lfa or the Lab 15?
I'm now thinking how to power them, I was thinking for a Crest cc 2800.
RMS-power (4 Ohm): 2x 965 Watt
RMS-power (8 Ohm): 2x 595 Watt
Will this be enough for 4x t48? 2 per channel.
How many watts do I need for 2 Titan's a channel?
Thanks!
Build:
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs
Re: Crest CC 2800 for 4x t48
Why not a QSC GX7? Better power than the Crest, almost a third the weight (15 lb for the GX7, 40 lb for the Crest), and the GX7 costs a few hundred less.
An amp capable of 60V @ 4 Ohms (900 watts @ 4 Ohms) is enough. All of the sub designs MUST be hard limited to 60VAC.
An amp capable of 60V @ 4 Ohms (900 watts @ 4 Ohms) is enough. All of the sub designs MUST be hard limited to 60VAC.
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
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Re: Crest CC 2800 for 4x t48
The lab 15 and the 3015lf have the same output.
It comes back to price.
While the lab 12 is often cheaper than the 3012lf for a T39, it doesn't usually work out that way for the lab 15 and 3015lf for the T48. The lab 15 is often more expensive.
The lab 15 and the 3015lf loaded T48's are limited to 60V, which = 450W 8 ohms.
60V into 4 ohms is 900W, with the 2 cabs per channel wired in parallel.
While it will probably run 2 cabs per channel, you might find it's getting into clipping before it hits max output for the T48's...
It comes back to price.
While the lab 12 is often cheaper than the 3012lf for a T39, it doesn't usually work out that way for the lab 15 and 3015lf for the T48. The lab 15 is often more expensive.
The lab 15 and the 3015lf loaded T48's are limited to 60V, which = 450W 8 ohms.
You can see that the amp specs you mention for the Crest are more than adequate for 1 cab per channel, but getting a bit close to the bleeding edge of the amp capability for 2 cabs a channel.RMS-power (4 Ohm): 2x 965 Watt
RMS-power (8 Ohm): 2x 595 Watt
60V into 4 ohms is 900W, with the 2 cabs per channel wired in parallel.
While it will probably run 2 cabs per channel, you might find it's getting into clipping before it hits max output for the T48's...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...
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- Posts: 71
- Joined: Tue Apr 01, 2014 9:36 am
- Location: Nieuw Amsterdam/Netherlands
Re: Crest CC 2800 for 4x t48
Okay, I'll go for the 3015LFA then.
For the amp, would the GX7 be better than the crest in performance, sound quality and price?
I'm using a Driverack PA2 as processor.
I've also got 4 J15's, would a QSC GX5 be enough voor 2 jack's per channel?
I've loaded them with the Eminence 3015.
Thanks!
For the amp, would the GX7 be better than the crest in performance, sound quality and price?
I'm using a Driverack PA2 as processor.
I've also got 4 J15's, would a QSC GX5 be enough voor 2 jack's per channel?
I've loaded them with the Eminence 3015.
Thanks!
Build:
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs
Re: Crest CC 2800 for 4x t48
Dutchman?Middelkevin wrote: I've also got 4 J15's, would a QSC GX5 be enough voor 2 jack's per channel?
Thanks!
TomS
Re: Crest CC 2800 for 4x t48
The Crest GX7 will allow the subs to run near maximum, but so will the amp. If the amp is run to it's max consistently, it's life will be shortened.
The GX5 should be enough since it's for the tops. Most likely, it will be plenty loud enought before you hit max on the amp.
The GX5 should be enough since it's for the tops. Most likely, it will be plenty loud enought before you hit max on the amp.
TomS
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- Posts: 71
- Joined: Tue Apr 01, 2014 9:36 am
- Location: Nieuw Amsterdam/Netherlands
Re: Crest CC 2800 for 4x t48
Oh, I see! yes, Dutchman!Tom Smit wrote:Dutchman?Middelkevin wrote: I've also got 4 J15's, would a QSC GX5 be enough voor 2 jack's per channel?
Thanks!
Thanks for your help.
Build:
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs
Re: Crest CC 2800 for 4x t48
Fixed that for you, Tom!Tom Smit wrote:The QSC GX7 will allow the subs to run near maximum, but so will the amp. If the amp is run to it's max consistently, it's life will be shortened.
The GX5 should be enough since it's for the tops. Most likely, it will be plenty loud enough before you hit max on the amp.
Either amp will work well, but the GX7 will spare your back, and your wallet. The GX3 & 5 are not lightweight amps, so choose carefully. FTR, if you are pushing your system past half power, you need to double the cabinet count of the system. For each doubling of the power output, you gain approximately 3dB. For every doubling of the cabs, you gain approximately 6dB. I urge you to study Bill's Subwoofer placement thread, and try to follow the placement instructions outlined in it, whenever you can. That thread is based purely on the science of sound physics.
For the "tops", pretty much any amp that will do 500 watts @ 4 Ohms is more than enough. This will make the Jacks domme luide! Pick a pair of amps from the same manufacturer, as some amps vent cooling front to rear and others vent rear to front. This will prevent 1 amp from drawing in the hot exhaust from the other amp.
Since you are in Europe, there is (was) a thread about SYNC amps that are available to you.
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
Re: Crest CC 2800 for 4x t48
Oops.Fixed that for you, Tom!
Thanks.
Last edited by Tom Smit on Mon Nov 24, 2014 11:36 am, edited 1 time in total.
TomS
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- Posts: 71
- Joined: Tue Apr 01, 2014 9:36 am
- Location: Nieuw Amsterdam/Netherlands
Re: Crest CC 2800 for 4x t48
The Synq amps are indeed available here.DJPhatman wrote:Fixed that for you, Tom!Tom Smit wrote:The QSC GX7 will allow the subs to run near maximum, but so will the amp. If the amp is run to it's max consistently, it's life will be shortened.
The GX5 should be enough since it's for the tops. Most likely, it will be plenty loud enough before you hit max on the amp.
Either amp will work well, but the GX7 will spare your back, and your wallet. The GX3 & 5 are not lightweight amps, so choose carefully. FTR, if you are pushing your system past half power, you need to double the cabinet count of the system. For each doubling of the power output, you gain approximately 3dB. For every doubling of the cabs, you gain approximately 6dB. I urge you to study Bill's Subwoofer placement thread, and try to follow the placement instructions outlined in it, whenever you can. That thread is based purely on the science of sound physics.
For the "tops", pretty much any amp that will do 500 watts @ 4 Ohms is more than enough. This will make the Jacks domme luide! Pick a pair of amps from the same manufacturer, as some amps vent cooling front to rear and others vent rear to front. This will prevent 1 amp from drawing in the hot exhaust from the other amp.
Since you are in Europe, there is (was) a thread about SYNC amps that are available to you.
But I prefer the non-digital amps.
yesterday I was working freelance and the company I was working for was using Yamaha's.
They told me they liked those amps very much and I thought they sounded very well!
So I'm planning to order one, a Yamaha P7000S.
Or are there people who use the synq 2K2 for subs who like it?
Build:
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs
2x Jack 15 3015/ASD1001
2x Titan 48 3015LF 36''
Building:
4x Wedgehorn 8
2x Titan 48 3015LF 36''
8x Otop J-array cabs