How to correctly match power amplifiers and passive loudspeakers 

You're most welcome, and thank you for watching :)

That's great Paul, very glad the video was helpful!

You're welcome Nathaniel. Hope your system sounds good!

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You're welcome, glad the video was helpful.

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+Binny NT You're welcome, thanks for watching!

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+Jim E Thanks Jim, always appreciate your support!

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That's great Rich, all the best with your music!

@@GLBProductions Your welcome sir ,please sir i have one more question to ask, can i use 2400watt skytec amplifier with 4ohm and connect with speakers with 8ohm is it possible or does it has disadvantage ????

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Thanks for your support Rohit!

+Chupacabraj You're welcome, thanks for watching.

+Philip Koshi thanks for the feedback, God Bless you too my brother!

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Not that I know of ;)

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+John Burgett You're welcome, thanks for watching! At the end of the day as long as an amp/speaker combination is loud enough for its intended use and there is no distortion or clipping the exact numbers do not really matter - you could use a 1 watt amplifier and still get decent level out of many modern loudspeakers! The key is having enough headroom to handle the peaks. Feel free to get in touch any time you have questions.

Thanks my friend, glad the video was helpful. May your speakers have a long and productive life 😄

Sadly, they won't be saved, but if you follow it, this is the best info I have seen so far. CONSTANTLY monitor your levels!!! I have been in the industry for over 40 years..... the horror stories I could tell you..... P.S. dj's are the worst!!! 😆

+Ray Sarael You're most welcome, thanks for watching!

Yes mistakes in this area can get expensive really quickly ;)

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Also if you stack two bass cabinets you'll get a free 3db extra in efficiency. Low mass drivers and a big volume for the bass cabinets also with low mass long throw drivers and max vas (equivalent volume, low suspension). And offcourse ribbon tweeters for the tops, niceee. And a middriver in the tops for snappy percussion. A 12'' or 15'' driver is not necessarilly 'bad' in mids it's just that percussion doesn't pop out properly. You can talk about ohms and watts all day and it does matter but what you want is large bass cabinets and good sounding hi-eff tops. What you don't want is those high mass car type subwoofer speakers I've tried that. I also don't believe in 'tricks' to get more bass like bassreflex or bandpass they all have their problems the tradeoff is not worth it, sealed all the way.

@@TimpBizkit yeah but designing a bass reflexx cabinet you also have to get a speaker that more stiff and heavy so at the same time it works against efficiency. I guess you might view speakers as 'entertainment devices' so in that sense bass reflexx is not that bad. It all get's a bit 'difficult' or 'subjective' with this kind of thing. There's also the cooling thing so when the fs is around 50hz you might think that's the not efficient part of the spectrum but actually the speaker has to do very little work in that area and get's lots of cooling so.. It all get's quite complicated the mix between entertainment devices and all kind of technical considerations. I guess in general any use of 'tricks' like bass reflex or bandpass makes the system more compact so you have to lug less wood around and store it somewhere. I had an outdoor party lately and the 4 18'' bass cabinets really had trouble filling it with any kind of bass. At some point there was quite a bit of heat coming from the speakers and I had to tune the limiter down. I hope it didn't damage the magnets I guess that's a case of not enough rig for the gig. And that's another factor how hot does it get inside that box I assumed it was 'ambient' but there just might be a problem with heat buildup. One advantage of bassreflex is that it has that ventilation to the outside world.

I don't know if 'lower' is 'less efficient' so to speak there's a bit of a difference between the lower bass (below 40) and the upper bass, the upper base has to be loud 'preferably' whilst the lower base just has to be audible when the lower bass like 30hz is audible that's enough, at least that's my experience the lower bass just has to be 'there' it doesn't matter much how loud it is. So you can crank up 30 hz 10 decibels it doesn't make much difference when it's audible it's audible when it comes to higher bass it's different. So you have to design a speaker to match those requirements.

That's great, means you've learned something!

+koolkiwikat When you say 'gain level' do you mean gain on the mixer? I already have a video on that: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KcUgggdxLPM.html

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Glad to hear that! Hope your new speakers sound good :)

+Nhlanhla Nhleko Thanks for watching! If you would like to support the channel please consider signing up to become a patron at www.patreon.com/glbproductions?ty=h Every little bit helps!

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Thanks for watching!

Thanks for watching! Once you know how to do impedance calculations it's easy to work out how many speakers can be added.

+Rodolfo Baliga Thanks for watching!

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+Chandru Narayanan You're welcome, thanks for watching.

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What are the power numbers on this speaker/amp combination?

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Thanks George.

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With a setup like that you need to measure the impedance of the speaker system as a whole through the passive crossover.

+Andreev Andrei Thanks for watching!

I'm afraid I'm not a speaker designer so really cannot tell you for sure if these components will work well together. I strongly suggest working from an existing design that tells you exactly what you need and how to put it together - this is not really a time for improvisation.

Thank you :)

Thanks for watching!

You're welcome Lu!

At the same time, remember that extra power is always useful to handle transients and give additional headroom to the system. This is necessary as live music is a very dynamic form of program material. Some manufacturers will even specify an amplifier that can provide 3dB of headroom over the speakers' PEAK power rating! Extra power does not have to translate into excessive volume :)

@@GLBProductions Absolutely true. Remember the gain structure of the mixer. The +4dbV is about 1.2Volts RMS or about 1.7V peak to peak. Due to the power supply on the mixers the mixer hard limits are between 10 to 12V peaks or a hard limit of about 12-14db above the +4dbV output. A ceremony running 1 watt RMS can only be driven about 12db higher before the board clips. Therefore peak is doubling the power 4 times. Board at +4dbV has up to 14 db headroom. The amp running 1 watt taking a +14db peak scales as follows up to board clipping. +3db 2 watts, +6db 4 watts, +9db 8 watts, +12db 16 watts, +15db is only 32 watts. Any amp more then 50 Watts/ch RMS will handle anything the sound board can throw at it. If your ceremony is running program at 10 Watts, then yes you want a 600 Watt/ch amp and I'm looking for hearing protection. Church I grew up in had an organ amp of 60 Watts. This was a traditional church with no band, a choir, piano, organ, and sound reinforcement for the preacher and elders. Main amp was 30 watts mono. It is plenty of power for a church wedding ceremony.

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Thanks Barbara.

Thank you for your offer! Let's hope it doesn't come to that...

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You're very welcome Jam!

I learned a lot.

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A properly set up active crossover will usually give a better sound because it allows you to remove the bass load from the fullrange amp and speakers.

Please explain what you mean by 'compatibility and synchronicity issues' thanks.

Unfortunately, it was my first time to come across your info-video, thanks for the reply, the other videos you have on youtube explained most of the questions I have in mind.

+John Creek Many thanks for spotting that John, annotation has been added :) The mic used in this particular video was a Beyerdynamic MCE72 - it's a stereo condenser mic which is specifically designed for picking up sounds at a distance, hence why it can be placed off to the side yet still sound good. I also like it because it runs on batteries and has an unbalanced output so I can connect directly to a video camera without the need for a mixer.

+GLB Productions Ah nice. It makes sense now not to have seen you with your trusty Mackie mixer. It's great that you can use the hardware you have to make better videos! Thanks for your quick reply.