Hello everyone
Home theater systems became very expensive in our country so I decided to build my own home theater. As I am a newbie to this I watched some videos on u tube. I ordered zk-tb21 amplifier from china. It states that it has 200 watts output power 2x50 watts speaker and 100 subwoofer. I am running it on 20volts 6 amp adapter.
Than I ordered 2 two way 6.5inch speakers having 100watts rms and 250 watts peak power each. Impedance 4 ohm each.
Also a subwoofer/woofer 10 inch 350 rms 1000 peak 4 ohm impedance.
Now the prob:
When I go above 50%volume speakers and sub starts to blast. At this level they produce a beautiful sound for small 10x10 room but above this level its like amp is over driving them. Then I connected both speakers in series and ran them on one channel and they were fine. So I added two 80 watts tweeters with each in series and small 4 inch sub with sub. Making all channels run on 8ohm impedance. Now the prob is there is more sound of tweeters then speakers and sub is still being over driven.
How can I optimize this system without adding more cost to produce a good quality sound (enough for 20x20 room)?
How can I stop speakers/sub from being overdriven or blow out? (In case any kid turns the volume knob to full)
How is a 200watt amp over driving speakers almost 4 times its power?
Home theater systems became very expensive in our country so I decided to build my own home theater. As I am a newbie to this I watched some videos on u tube. I ordered zk-tb21 amplifier from china. It states that it has 200 watts output power 2x50 watts speaker and 100 subwoofer. I am running it on 20volts 6 amp adapter.
Than I ordered 2 two way 6.5inch speakers having 100watts rms and 250 watts peak power each. Impedance 4 ohm each.
Also a subwoofer/woofer 10 inch 350 rms 1000 peak 4 ohm impedance.
Now the prob:
When I go above 50%volume speakers and sub starts to blast. At this level they produce a beautiful sound for small 10x10 room but above this level its like amp is over driving them. Then I connected both speakers in series and ran them on one channel and they were fine. So I added two 80 watts tweeters with each in series and small 4 inch sub with sub. Making all channels run on 8ohm impedance. Now the prob is there is more sound of tweeters then speakers and sub is still being over driven.
How can I optimize this system without adding more cost to produce a good quality sound (enough for 20x20 room)?
How can I stop speakers/sub from being overdriven or blow out? (In case any kid turns the volume knob to full)
How is a 200watt amp over driving speakers almost 4 times its power?
Hi Sohailwah,
Nothing can protect you from a system being abused. You can't make it stupid-proof. Low power will have you blowing tweeters and possibly midrange units.
Having high power gives you headroom for peaks. It is up to you to make sure your speakers can deliver the SPL you are asking of them.
Now speakers. Very few will dissipate the power they are advertised at. It's all fiction. Look at rated efficiency and maximum SPL. You want the most efficient, most accurate speakers you can find that you can afford. You will only use the amount of power you need.
So, if you like it loud, why on earth would you buy 6.5" speakers? 4" sub? Really? Volume is about the volume of air displaced. A 4" speaker has to move much further than an 8" woofer. A 15" woofer needs to move even less. Also, for low bass you need a large box. This is physics.
Fight physics, you will lose.
Nothing can protect you from a system being abused. You can't make it stupid-proof. Low power will have you blowing tweeters and possibly midrange units.
Having high power gives you headroom for peaks. It is up to you to make sure your speakers can deliver the SPL you are asking of them.
Now speakers. Very few will dissipate the power they are advertised at. It's all fiction. Look at rated efficiency and maximum SPL. You want the most efficient, most accurate speakers you can find that you can afford. You will only use the amount of power you need.
So, if you like it loud, why on earth would you buy 6.5" speakers? 4" sub? Really? Volume is about the volume of air displaced. A 4" speaker has to move much further than an 8" woofer. A 15" woofer needs to move even less. Also, for low bass you need a large box. This is physics.
Fight physics, you will lose.
My question is still there. If I am on a limited budget, should I change the amp or invest more in speakers? Main goal is to optimize the system for a mid size room.
What do you guys suggest?
What would be a good combo
What do you guys suggest?
What would be a good combo
Please draw us a small schematic of how exactly you wired things up. Note that the -S+ are subwoofer connections and volume controls are on the front for sub and Main volume.
The semiconductor data sheet states that it can produce 2 X 50Watts into a 4 Ohm load or 2 X 25Watt approximately into an 8 Ohm load, at 20volts DC.
No where near what you think you are getting.
Read the data sheet and you will know.
I suspect you are running out of power, not overloading your speakers, whatever they are.
No where near what you think you are getting.
Read the data sheet and you will know.
I suspect you are running out of power, not overloading your speakers, whatever they are.
I suspected that at first. I put the amp in my car to check and it shocked me. There I've installed two pioneer three way speakers having 200watts RMS and 500 peak each. No sub woofer. It performed so well that at 100% of volume level the car was shaking. Pretty good bass and without compromising the sound quality. After that I have a firm believe that most of output powers advertised or printed on speakers are far more over stated. Or the amp power is under stated. How come a 100 watt amp drives 400watts speakers so perfectly.
With due respect Guys I am business graduate and noob in this matter. Don't know about data sheets and technical stuff. I only have a small know how about watts volts ampares ohms rms etc
I'll try to upload schematic diagram ASAP.
I'll try to upload schematic diagram ASAP.
Hi Sohailwah,
#1 Invest in speakers that do the job.
#2 Don't clip your amplifier and blow tweeters.
It doesn't matter how much money you have. Reality doesn't care. Do it right, if you don't you won;t be happy and you may damage things.
Nothing is immune to damage due to abuse. Accept it.
#1 Invest in speakers that do the job.
#2 Don't clip your amplifier and blow tweeters.
It doesn't matter how much money you have. Reality doesn't care. Do it right, if you don't you won;t be happy and you may damage things.
Nothing is immune to damage due to abuse. Accept it.