Good morning,
I'm building my own line array speakers. I plan to purchase two 10" 250W speakers for it. Do you think that running 2xTDA7294 bridged can supply enough one of these speakers?
I'm afraid to run the speaker with too much power, as I already had a single TDA7294 amplifier and found it very powerful for a single 10" speaker (never had courage to run at 100% volume) in a home listening context.
But when running it as line array in a PA system context, I don't know if 2xTDA7294 will provide enough power to cover 200-300 peoples room (planning to use 4 speakers cabinets * 2x10" 250w speakers per cabinet = 8x10" speakers with 16xTDA7294).
As this will be used with subwoofer cabinet, I would says that these line array speakers will get lowcut processing, eliminating some low frequencies power. Maybe it will become less risky to provide high power to the speaker?
If you have any other IC proposition for my project, tell me, I'm very interested.
Thanks in advance.
I'm building my own line array speakers. I plan to purchase two 10" 250W speakers for it. Do you think that running 2xTDA7294 bridged can supply enough one of these speakers?
I'm afraid to run the speaker with too much power, as I already had a single TDA7294 amplifier and found it very powerful for a single 10" speaker (never had courage to run at 100% volume) in a home listening context.
But when running it as line array in a PA system context, I don't know if 2xTDA7294 will provide enough power to cover 200-300 peoples room (planning to use 4 speakers cabinets * 2x10" 250w speakers per cabinet = 8x10" speakers with 16xTDA7294).
As this will be used with subwoofer cabinet, I would says that these line array speakers will get lowcut processing, eliminating some low frequencies power. Maybe it will become less risky to provide high power to the speaker?
If you have any other IC proposition for my project, tell me, I'm very interested.
Thanks in advance.
2 TDA's will give 200 watts.
For 2 off 250W speakers to get full volume will need 500WRMS.
I would look for a 500WRMS class D or class AB amplifier.
If your worried about blowing speakers buy a DC speaker protect system too.
For 2 off 250W speakers to get full volume will need 500WRMS.
I would look for a 500WRMS class D or class AB amplifier.
If your worried about blowing speakers buy a DC speaker protect system too.
I was planing to use 4 TDA (2 per speakers, in bridge mode). So, I will lose only 50W per speaker. Is it acceptable?
I'm looking for but didn't found yet any IC providing this power. And transistors based amp seems too complicated (too many components).
Does a DC speaker protect system also protect the amp if it has less power than the speaker? And is there any circuit diagram to build one myself?
With due resoect, you sound somewhat inexperienced about LOUD systems such as PA ones and worry too much 🙂
No big deal, we have ALL been through that or similar.
Trying to help:
1)
Too loud and neighbours complained?
Not a problem in live sound situations.
Speaker showed some type of distress?
Started smoking, cut off, voice coil banged loudly against back plate?
What kind of enclosure was it mounted in?
Too much power can burn a speaker voice coil, not your case (250W speaker) but improper mounting can damage one, even at very low power, mechanically.
One speaker cabinet? ( 2 speakers?
An individual speaker?
To avoid confusion, use "speaker" for the single electroacoustic transducer and "cabinet" for the whole system enclosed inside a wooden box.
Not the same.
Some (optimistic) 1600W RMS available (I´d expect some 1300W RMS, in any case a lot of power) will DEFINITELY cover 300 people audiences, speciallly if in a closed room.
It fact it might get unbearably loud.
You tell us nothing about the mid/high components of your PA system, nor what will drive them.
back to those 10" speakers, also describe them better, show a direct link, "250W" by itself tells little.
250W RMS?
250W PMPO?
Not the same by an 8:1 ratio
Sometimes 16:1 😱
No big deal, we have ALL been through that or similar.
Trying to help:
1)
How did you find it too powerful?
Too loud and neighbours complained?
Not a problem in live sound situations.
Speaker showed some type of distress?
Started smoking, cut off, voice coil banged loudly against back plate?
What kind of enclosure was it mounted in?
Too much power can burn a speaker voice coil, not your case (250W speaker) but improper mounting can damage one, even at very low power, mechanically.
What does ONE mean.
One speaker cabinet? ( 2 speakers?
An individual speaker?
To avoid confusion, use "speaker" for the single electroacoustic transducer and "cabinet" for the whole system enclosed inside a wooden box.
2 x 7294 *total* , same per cabinet, samefor individual speaker?
Not the same.
Now we are talking.
Some (optimistic) 1600W RMS available (I´d expect some 1300W RMS, in any case a lot of power) will DEFINITELY cover 300 people audiences, speciallly if in a closed room.
It fact it might get unbearably loud.
You tell us nothing about the mid/high components of your PA system, nor what will drive them.
Describe subwoofer system in detail.
back to those 10" speakers, also describe them better, show a direct link, "250W" by itself tells little.
250W RMS?
250W PMPO?
Not the same by an 8:1 ratio
Sometimes 16:1 😱
You will LOSE nothing, speakers must AWAYS handle more power than amplifier can provide, this is PA duty, not sedate home Hi Fi.
In most of the world, you can buy asian-made PA amplifiers cheaper than you can buy the transformers and heat-sinks for a PA-size amplifier.
https://www.amazon.com/Channel-Professional-Amplifier-SYS-2000-MUSYSIC/dp/B0099XQBD4
https://www.amazon.com/Behringer-KM1700-BEHRINGER-Black/dp/B01MAY7S7W
https://www.amazon.com/Rockville-1400w-Channel-Amplifier-RPA12/dp/B07NZZW7PX
https://www.amazon.com/Gemini-XGA-3000-Professional-Equipment-Amplifier/dp/B002JM7NSO
https://www.amazon.com/Channel-Professional-Amplifier-SYS-2000-MUSYSIC/dp/B0099XQBD4
https://www.amazon.com/Behringer-KM1700-BEHRINGER-Black/dp/B01MAY7S7W
https://www.amazon.com/Rockville-1400w-Channel-Amplifier-RPA12/dp/B07NZZW7PX
https://www.amazon.com/Gemini-XGA-3000-Professional-Equipment-Amplifier/dp/B002JM7NSO
Hello,
I'm not interested in purchasing pre-made thing, my goal is to experiment with DIY. If pre-made thing was fitting my needs, I will purchase an entire PA system.
Yes, I'm very new to this world.
The burned speaker: Pioneer 6x9" 5-wayCar Speakers (650W 100 RMS) TS-A956H Component Car Speaker Price in India - Buy Pioneer 6x9" 5-wayCar Speakers (650W 100 RMS) TS-A956H Component Car Speaker online at Flipkart.com
So, planning to use only 4x (or 2x ??) piezo tweeters (something like this: http://amzn.to/3hn8wqd) and maybe adding another IC amplifier for driving these tweeters.
For maximum clarification, here is a short description of the system:
For information, this christmas we used 2x Genesis 400W RMS speakers with VHOST YQ2000 amplifier + 2x unknown (seems to be DIY) subwoofers with CA-2000. The audience was the same than I want to reach with my line array speakers and I found that the 2x Genesis 400W speakers was too much powerful (at maximum volume), it is ear killer for peoples in the front (5-10m distance between people & the speaker). For the farthest people, sound is very good, even at 1/2 - 2/3 volume.
In my conclusion, 400W RMS per cabinet at full power is too much for the audience. And my line array is supposed, with 4x TDA7294, to provide theoretically 200W RMS per speaker, then 400W RMS per cabinet. So approximately the same.
So I think, yes 4x TDA7294 will be sufficient for my needs. Do you think the same? Any suggestions appreciated.
I'm not interested in purchasing pre-made thing, my goal is to experiment with DIY. If pre-made thing was fitting my needs, I will purchase an entire PA system.
Yes, I'm very new to this world.
I damaged some 8 inch speakers with individual TDA7294 per speaker.
The burned speaker: Pioneer 6x9" 5-wayCar Speakers (650W 100 RMS) TS-A956H Component Car Speaker Price in India - Buy Pioneer 6x9" 5-wayCar Speakers (650W 100 RMS) TS-A956H Component Car Speaker online at Flipkart.com
1 cabinet, 2x 10 inch woofer in the cabinet, 4x TDA7294 for these woofers.
Still thinking what I should do with mid/high. Just went to shop last week and I didn't found any mid speaker. I was also looking for compression driver for high frequencies, didn't found also.
So, planning to use only 4x (or 2x ??) piezo tweeters (something like this: http://amzn.to/3hn8wqd) and maybe adding another IC amplifier for driving these tweeters.
250W RMS, 8 ohms impedance. I googled the brand but didn't found any useful link (china provenance, surely).
For maximum clarification, here is a short description of the system:
For information, this christmas we used 2x Genesis 400W RMS speakers with VHOST YQ2000 amplifier + 2x unknown (seems to be DIY) subwoofers with CA-2000. The audience was the same than I want to reach with my line array speakers and I found that the 2x Genesis 400W speakers was too much powerful (at maximum volume), it is ear killer for peoples in the front (5-10m distance between people & the speaker). For the farthest people, sound is very good, even at 1/2 - 2/3 volume.
In my conclusion, 400W RMS per cabinet at full power is too much for the audience. And my line array is supposed, with 4x TDA7294, to provide theoretically 200W RMS per speaker, then 400W RMS per cabinet. So approximately the same.
So I think, yes 4x TDA7294 will be sufficient for my needs. Do you think the same? Any suggestions appreciated.
where's the line array part come in... or are we talking the components of a single element?
dispersion without elevation information is dubious...a ground stack system and a flown array are two different animals and both can be "ear killers"...where to start with the whole fudge of "running at full power" without relative efficiency entering the discussion.
dispersion without elevation information is dubious...a ground stack system and a flown array are two different animals and both can be "ear killers"...where to start with the whole fudge of "running at full power" without relative efficiency entering the discussion.
can you supply more info on the Genesis 400 w speakers,please?
any chance they are these https://www.amazon.ca/DS18-GEN-M8SE-Genesis-Midrange-Speaker/dp/B00SV2MJW6
any chance they are these https://www.amazon.ca/DS18-GEN-M8SE-Genesis-Midrange-Speaker/dp/B00SV2MJW6
Last edited:
We are talking the components of a single element.
Your link is wrong. I already tried to google it entire night but didn't found it.
The design is like this: Titan 12 | Wharfedale Pro - Sound Reinforcement and Live Sound Equipment
On the back, it is written: "400W RMS, 8 ohms, 800W peak". Nothing else.
so how many elements are you proposing for your array?
and what pray tell are you proposing to use for high frequencies? the horn in the Titan is intended for point source use and depending on how you orient the elements the distance between them is going to make for massive comb filtering in the response. and just what are you using for crossover duties?
can you upload a pic of this driver your using?
and what pray tell are you proposing to use for high frequencies? the horn in the Titan is intended for point source use and depending on how you orient the elements the distance between them is going to make for massive comb filtering in the response. and just what are you using for crossover duties?
can you upload a pic of this driver your using?
HI there,
just a few comments from my side.
I have already seen some low-budget active PA-speakers. Not directly Line-Array modules, but more those typical 12" to 15" with a horn.
However most of them had a Class-D amp for the low-frequency driver because of the power and some Class-AB for the high-frequency horn.
Please be aware that a linear-amplifier in this power-range needs LOTS of cooling. So I would stay away from TDA7294. Especially for a PA-application. For PA it's not uncommon to push speakers and especially amps shortly before clipping point in order to expose the music to as much as possible people with as less as possible speakers 🙂
Quite typical for your application would be a small IRS2092 circuit. If you want to stay with integrated circuits you could also check out TI's TPA3255. Could also fit from power-perspective.
just a few comments from my side.
I have already seen some low-budget active PA-speakers. Not directly Line-Array modules, but more those typical 12" to 15" with a horn.
However most of them had a Class-D amp for the low-frequency driver because of the power and some Class-AB for the high-frequency horn.
Please be aware that a linear-amplifier in this power-range needs LOTS of cooling. So I would stay away from TDA7294. Especially for a PA-application. For PA it's not uncommon to push speakers and especially amps shortly before clipping point in order to expose the music to as much as possible people with as less as possible speakers 🙂
Quite typical for your application would be a small IRS2092 circuit. If you want to stay with integrated circuits you could also check out TI's TPA3255. Could also fit from power-perspective.
4x cabinets, 2 left and 2 right. But considering to increase it on the future when needed.
At this time I'm still exploring this question, trying some simulations and designing it on AUTOCAD. Maybe another topic I'm going to open in this forum.
Digital stuffs. Still modeling it on my computer. Maybe based on ARM chips.
No, I didn't yet purchase it. Waiting to see if there is better driver in next weeks/months on local store.
with only two per side it won't behave like an array and there's no point, go point source like a Synergy or Meh
with respect to amp modules have you considered the ICE power modules?
with respect to amp modules have you considered the ICE power modules?
Just thinking aloud, I would first design **one** "Line Array" cabinet/component/cell
As in a cabinet with two 10" speakers (since you chose that size), two midrange speakers between them and 1 or 2 high power Tweeters or Horn/Driver combinations.
Just like the typical line Array element.
After you have defined your goals better, chosen drivers, decide on how to power them, 3 x TDA7294 may be fine: 2 for woofer duty, 1 fo mid/highs (which have not yet been defined) , then build and tweak *one* prototype.
5 TDA7294? (2 per woofer + 1 for mids/highs)
Maaaybbbeee, start with a simpler system.
Once you are happy with it, build as many as you can afford, but being a new design you can not skip the "experimental" stage.
Class AB is not ultra efficient but heatsinking a *distributed* power amp system such as this one is not that hard. Not as if you were building a 2 or 4 kW rack mounted amplifier 🙂
As in a cabinet with two 10" speakers (since you chose that size), two midrange speakers between them and 1 or 2 high power Tweeters or Horn/Driver combinations.
Just like the typical line Array element.
After you have defined your goals better, chosen drivers, decide on how to power them, 3 x TDA7294 may be fine: 2 for woofer duty, 1 fo mid/highs (which have not yet been defined) , then build and tweak *one* prototype.
5 TDA7294? (2 per woofer + 1 for mids/highs)
Maaaybbbeee, start with a simpler system.
Once you are happy with it, build as many as you can afford, but being a new design you can not skip the "experimental" stage.
Class AB is not ultra efficient but heatsinking a *distributed* power amp system such as this one is not that hard. Not as if you were building a 2 or 4 kW rack mounted amplifier 🙂
final size of the array is going to affect what your allowed to do at the element level without causing undue consequences....
the manifolds for proper high frequency arrays are not going to perform well small scale the narrow vertical dispersion angle becomes the problem.
let see where manoarafety chooses to go from here, would he rather discuss amps?
the manifolds for proper high frequency arrays are not going to perform well small scale the narrow vertical dispersion angle becomes the problem.
let see where manoarafety chooses to go from here, would he rather discuss amps?
Merry Christmas every one
since its a TDA7294 post may i ask for why i cant get a full power from that CHIP?
im using a trasnformer 24-0-24and 3300uF capacitors at power supply and wiring is identical to datasheet
i get a low volume when i measure its AC voltage amplitude it turned to be from 6 to 10 volt AC and even other family chips TDA7296 , TDA7295 ..... the sound is clear and good but volume doesnt seem to be even 25w ?
btw i tested a 8R speaker and 4R speaker it didnt differ a lot ...is this a fake CHIP?
help plelase
since its a TDA7294 post may i ask for why i cant get a full power from that CHIP?
im using a trasnformer 24-0-24and 3300uF capacitors at power supply and wiring is identical to datasheet
i get a low volume when i measure its AC voltage amplitude it turned to be from 6 to 10 volt AC and even other family chips TDA7296 , TDA7295 ..... the sound is clear and good but volume doesnt seem to be even 25w ?
btw i tested a 8R speaker and 4R speaker it didnt differ a lot ...is this a fake CHIP?
help plelase
Like Enzo often says, "the amplifier is that thingie between power supply and speaker"
Meaning it can throttle power available from supply but not create it.
As in:if you have a "100W" amplifier, but a "25W" supply, guess how much can speaker get,tops.
trasnformer 24-0-24 means +/- 33V rails so under load some 24V peak so some 17VAC tops
So 35W RMS tops on 8 ohm, almost 70W into 4
2 possibilites:
*transformer is way under rated (or you are not fully driving your amp)
or:
* you are playing music and measuring output with a multimeter
in this case, values will consistently be "low" because Musicis not constant and multimeter averages higher and lower levels.
proper output testing is using a sinewave (which has a constant level), just reaching clipping (normally checked with an oscilloscope) and a constant predictable load such as a proper value load resistor.
okay i thought that so i test it using a 120VA torroidal transformer " i trusted that rating cause Edifier S530 used same rating with TDA7296 and also checked with TDA7296 borad and unfortunately same result " and thought to reach the max that TDA7294 can handle the ting is the test with 24-0-24 volt transformer gives same output result with 36-0-36 volt transformer and same AC output and also same sound level to my ears unfortunately i dont have a scope