Hey guys I just purchased four turbosound tms 3's , I need suggestions on a amp or amps I can use. Im going to be using four 721's as my sub's and ill be using 2 crest ca 12's to run those. Can I use a next CA 12?
Turbosound TMS 3 - Amp suggestions?
- Thread starter Reginald Poliah
- Start date
Re: Turbosound TMS 3 - Amp suggestions?
I would just buy more of the same, since you already have a couple of Ca12s. They are heavy, but work horses.
It is not a bad idea to use all the same model amp. It makes swapping things around easy if you need to.
I would just buy more of the same, since you already have a couple of Ca12s. They are heavy, but work horses.
Re: Turbosound TMS 3 - Amp suggestions?
How much more ca 12's would you suggest the get?
Re: Turbosound TMS 3 - Amp suggestions?
If you only load down to 4 ohms/channel-you will have some backup (by loading down the other amps to 2 ohms) if something goes wrong.
But that costs more and is more to carry around, including more speaker cable.
Since the TMS 3s are older cabinets, it would be helpful to know if they have original drivers in them or what the impedance of the specific bands is. Drivers tend to get swapped out over the years-so without knowing what the specific impedance loads are-it would be a guess as to how many amps to use.
And it is never a bad idea to have an extra amp or two in the rack-just in case. It is easier to swap out an amp than to rewire the rack during the show.
It depends on how he feels about loading the amps down to 2 ohms. Some people don't like it-others are fine.
If you only load down to 4 ohms/channel-you will have some backup (by loading down the other amps to 2 ohms) if something goes wrong.
But that costs more and is more to carry around, including more speaker cable.
Since the TMS 3s are older cabinets, it would be helpful to know if they have original drivers in them or what the impedance of the specific bands is. Drivers tend to get swapped out over the years-so without knowing what the specific impedance loads are-it would be a guess as to how many amps to use.
And it is never a bad idea to have an extra amp or two in the rack-just in case. It is easier to swap out an amp than to rewire the rack during the show.
Re: Turbosound TMS 3 - Amp suggestions?
Ditto to everything Ivan has said. As a note, we have run Turbo systems at 2 ohms as the normal amp loading for nearly 30 years. You will not have any issues if you choose to go that route.
Ditto to everything Ivan has said. As a note, we have run Turbo systems at 2 ohms as the normal amp loading for nearly 30 years. You will not have any issues if you choose to go that route.
Re: Turbosound TMS 3 - Amp suggestions?
All original Drivers how would you guys suggest I run them ?>
All original Drivers how would you guys suggest I run them ?>
Re: Turbosound TMS 3 - Amp suggestions?
Rather than have us look it up. It has been a few years since those cabinets were popular.
In other words-help us help you.
Some other things to consider. Are all of your amps going to be in one rack or in a rack behind each stack?
Is it a stereo or mono system?
Knowing the specifics of what you want the system to do would help get useful suggestions.
Different people have different ideas of how to "run a system".
Not to sound like a jerk, but why not make it easy on others and YOU tell us the impedance loads of each freq band.
Rather than have us look it up. It has been a few years since those cabinets were popular.
In other words-help us help you.
Some other things to consider. Are all of your amps going to be in one rack or in a rack behind each stack?
Is it a stereo or mono system?
Knowing the specifics of what you want the system to do would help get useful suggestions.
Different people have different ideas of how to "run a system".
Re: Turbosound TMS 3 - Amp suggestions?
The 2- 15's are 1000 watts @ 4ohms.
The 2-10's are 400 watts @ 8ohms.
The 2-1' are 150 watts @16ohms.
All Of my Amps Are Going in One Rack.
Im Using a Turbosound LMS D6 to process the tops and subs seeing as it already has a preset tuned to these boxes.
Its gonna be mono setup.
"Not to sound like a jerk, but why not make it easy on others and YOU tell us the impedance loads of each freq band."
Don't worry about it I'll take all the advice I can get.
Since I don't want to go below 2ohms, can I use A splitter from the processor going in to the amps.ex. For the 15's
I use a splitter from one xlr to two xlr so I can use two amps?
Okay NP,
The 2- 15's are 1000 watts @ 4ohms.
The 2-10's are 400 watts @ 8ohms.
The 2-1' are 150 watts @16ohms.
All Of my Amps Are Going in One Rack.
Im Using a Turbosound LMS D6 to process the tops and subs seeing as it already has a preset tuned to these boxes.
Its gonna be mono setup.
"Not to sound like a jerk, but why not make it easy on others and YOU tell us the impedance loads of each freq band."
Don't worry about it I'll take all the advice I can get.
Since I don't want to go below 2ohms, can I use A splitter from the processor going in to the amps.ex. For the 15's
I use a splitter from one xlr to two xlr so I can use two amps?
Re: Turbosound TMS 3 - Amp suggestions?
View attachment Turbosound_TMS-3.pdfView attachment Turbosound_TMS-3.pdf
View attachment Turbosound_TMS-3.pdfView attachment Turbosound_TMS-3.pdf
Re: Turbosound TMS 3 - Amp suggestions?
I would suggest amp A channel 1 has the lows of 2 cabinets on it. Channel b of the same amp has all the mids on it.
Amp B channel 1 has the lows of the other 2 cabinets on it. Chanel B has all the highs on it.
Or you could use 4 amps and lessen the load on the amp.
The reason I split the lows between the 2 amps is for a couple of reasons. It will lessen the current draw from the wall (since it would be loaded down to 2 ohms/channel), and if one amp should fail, you still have 'some sound" coming out of the system. If one amp had the lows and the other the mid/highs, then a single amp failure would sound worse. than losing some of the lows and either the mids or the highs.
But running 4 amps would allow you to "double up" on the amps if one should fail and still be OK
It comes down to money, weight, rack size etc
You could get by with just 2 amps-for all 4 cabinets.
I would suggest amp A channel 1 has the lows of 2 cabinets on it. Channel b of the same amp has all the mids on it.
Amp B channel 1 has the lows of the other 2 cabinets on it. Chanel B has all the highs on it.
Or you could use 4 amps and lessen the load on the amp.
The reason I split the lows between the 2 amps is for a couple of reasons. It will lessen the current draw from the wall (since it would be loaded down to 2 ohms/channel), and if one amp should fail, you still have 'some sound" coming out of the system. If one amp had the lows and the other the mid/highs, then a single amp failure would sound worse. than losing some of the lows and either the mids or the highs.
But running 4 amps would allow you to "double up" on the amps if one should fail and still be OK
It comes down to money, weight, rack size etc
Re: Turbosound TMS 3 - Amp suggestions?
Current draw from the wall will be the same if using 1 x 1000w amp or 2 x 500w amps. The wall outlet doesn't care about individual load impedances of the amps, only the total current draw required to produce the output.
Current draw from the wall will be the same if using 1 x 1000w amp or 2 x 500w amps. The wall outlet doesn't care about individual load impedances of the amps, only the total current draw required to produce the output.
Re: Turbosound TMS 3 - Amp suggestions?
Total current draw might be the same but it's a lot easier to plug 2 x 500W amps into different circuits/outlets than to spread the load of a single 1000W amp over multiple outlets...
Total current draw might be the same but it's a lot easier to plug 2 x 500W amps into different circuits/outlets than to spread the load of a single 1000W amp over multiple outlets...
Re: Turbosound TMS 3 - Amp suggestions?
What I meant was-if you had 1 amp that was "fully loaded down (with the lows)" on both channels, there is a MUCH GREATER chance that it will trip either its own breaker or the wall breaker, than an amp that is fully loaded on ONE channel (the lows) and the other channel is not running as hard (doing the mids or highs), not only into a higher impedance-but also not producing as much power on the second channel.
While the total current draw from both amps combined will be close (enough) to the same no matter how you load them, I would "assume" somebody who is running CA12's would be running each amp from it's own breaker. If not-it really doesn't matter-the breaker is going to blow if pushed a bit.
I stand by my comment.
Actually it is NOT. You have to consider the idle current draw of the amp and also how efficient the amps are at different power levels. It is often NOT linear.
What I meant was-if you had 1 amp that was "fully loaded down (with the lows)" on both channels, there is a MUCH GREATER chance that it will trip either its own breaker or the wall breaker, than an amp that is fully loaded on ONE channel (the lows) and the other channel is not running as hard (doing the mids or highs), not only into a higher impedance-but also not producing as much power on the second channel.
While the total current draw from both amps combined will be close (enough) to the same no matter how you load them, I would "assume" somebody who is running CA12's would be running each amp from it's own breaker. If not-it really doesn't matter-the breaker is going to blow if pushed a bit.
I stand by my comment.
Re: Turbosound TMS 3 - Amp suggestions?
The idle current is negligible compared to the current draw at full o/p.
As far as efficiency goes, let's look at the 2 main classes of amplifier used for high power sound reinforcement, class D and class AB.
Class D is in fact, very linear in its efficiency.
A class AB amplifier actually rises in its efficiency as it is driven harder! At full o/p, class AB efficiency is usually around 60%.
A 1000w amplifier x 60% = 1666w/240v = 6.94A
A 500w amplifier x 60% = 833w/240v = 3.47A x 2 amplifiers =6.94A
As you can see current draw is identical.
On this point, I agree. Running 2 amps will, of course, allow the load to be spread across 2 circuits.
note: I have used 240v. You can substitute your local supply V and the 2 current figures will still match each other.
The idle current is negligible compared to the current draw at full o/p.
As far as efficiency goes, let's look at the 2 main classes of amplifier used for high power sound reinforcement, class D and class AB.
Class D is in fact, very linear in its efficiency.
A class AB amplifier actually rises in its efficiency as it is driven harder! At full o/p, class AB efficiency is usually around 60%.
A 1000w amplifier x 60% = 1666w/240v = 6.94A
A 500w amplifier x 60% = 833w/240v = 3.47A x 2 amplifiers =6.94A
As you can see current draw is identical.
On this point, I agree. Running 2 amps will, of course, allow the load to be spread across 2 circuits.
note: I have used 240v. You can substitute your local supply V and the 2 current figures will still match each other.
Re: Turbosound TMS 3 - Amp suggestions?
Correct I have each amp has its own breaker because at full draw the they each pull 30 amps.
but I'm tired of walking around with a huge portable breaker box looking into a pdu that could power up these amps ,these ca's draw tons of power
Correct I have each amp has its own breaker because at full draw the they each pull 30 amps.
but I'm tired of walking around with a huge portable breaker box looking into a pdu that could power up these amps ,these ca's draw tons of power
Re: Turbosound TMS 3 - Amp suggestions?
The CA12 is class H, not AB. Efficiency will be significantly better than AB as the rail voltage is modulated, but lower than class D. Idle current definitely becomes less important the harder you drive the amp, however there are higher losses in a 2Ω system. I would argue these are significant if you consider the whole circuit - speaker cabling, and for many reasons make 2Ω operation less desirable (though probably workable).
Re: Turbosound TMS 3 - Amp suggestions?
Your CA12 will never draw 30A if you are using your system correctly. The 1/8 power spec of the CA12 is 10.2 amps, which reflects maximum real-world performance before speaker damage. It should be possible to pair a heavy draw CA12 (LF) with a lighter draw CA12 (HF) on a 20A circuit. As long as you stay out of clipping, you're going to be fine.