Would a 1000 watt amplifier do this?

[hallowee1234]

Do you think that a 1000 watt amplifier would be able to power 7 100 watt speakers at medium volume?

 

[TLS Guy]

Do you think that a 1000 watt amplifier would be able to power 7 100 watt speakers at medium volume?

Not if they are all in parallel. What sort of system is this? If you are building a system like this you must have a plan for handling the impedance issues. If you connected seven speakers together, even if they were 8 ohms, you would have an impedance of just over 1 ohm and blow the amp.

So with that many speakers, you need to go with a 70 volt speaker system, or use impedance balancing auto transformers.
It sounds to me that you are already out of your depth.

 

[j_garcia]

Based on your previous post, what you need is a distributed amp that has enough channels for what you want to do or an impedance matching speaker selector. Not one giant amp.

In your previous post, a 70v system was what was recommended as well, especially since it will be outdoor.

Speakers do not have "wattage". That is normally the maximum rating, not how much they require to play.

 

[highfigh]

Do you think that a 1000 watt amplifier would be able to power 7 100 watt speakers at medium volume?

What is the application, brute force audio system, or are you trying to distribute it over a large area, and/or in several zones.

This is called 'distributed audio' and the industry has found that a mono or stereo amplifier with volume controls for each speaker/pair is a bad way to go about this.

 

[lovinthehd]

Previous thread from OP https://forums.audioholics.com/forums/threads/question.127051/

 

[TLS Guy]

Previous thread from OP https://forums.audioholics.com/forums/threads/question.127051/

Thank Lovin. That clears it up. For his purposes he absolutely needs a 70 volt system. That is the ONLY way to engineer that. The OP can make as many posts as he wants, but he will get the same answer every time.

 

[lovinthehd]

Thank Lovin. That clears it up. For his purposes he absolutely needs a 70 volt system. That is the ONLY way to engineer that. The OP can make as many posts as he wants, but he will get the same answer every time.

Somewhat the results of advertising of audio gear to be so "watt" based, particularly speakers, I suppose....

 

[lovinthehd]

Maybe something like this would help https://soundcertified.com/speaker-wiring-diagram-guide/

 

[hallowee1234]

Based on your previous post, what you need is a distributed amp that has enough channels for what you want to do or an impedance matching speaker selector. Not one giant amp.

In your previous post, a 70v system was what was recommended as well, especially since it will be outdoor.

Speakers do not have "wattage". That is normally the maximum rating, not how much they require to play.

How much power do you think a 70 volt amplifier would need though?

 

[TLS Guy]

How much power do you think a 70 volt amplifier would need though?

I don't think you understand what a 70 volt distributed system is. They are high impedance, and there is a transformer at every speaker. Each transformer has taps marked in watts, so you can put the power you want at each speaker. the addition sum of the watts at each tap needs to equal the power of the amplifier. I would think in your situation you need a public address amp in the 20 to 30 watt range. You do NOT need high powers for this type of system. This is the way PA systems in buildings have worked the world over for almost 100 years now.
Since this is a high impedance system the current is low, and so you connect the speakers with cheap bell wire.

 

[hallowee1234]

Do you think that a 1000 watt amplifier would be able to power 7 100 watt speakers at medium volume?

I made a grave miscalculation, I only need 4.

 

[TLS Guy]

I made a grave miscalculation, I only need 4.

You are going to be running this mono, so yo still need a 70 volt distributed system. That is the best, cheapest and professional way to design it.

 

[lovinthehd]

I have an old Crest CM2208 that would be appropriate for all the possibilities posed so far....just not eager to box up let alone arrange shipment....

 

[William Lemmerhirt]

I have an old Crest CM2208 that would be appropriate for all the possibilities posed so far....just not eager to box up let alone arrange shipment....

Not related really, but I have a crest fa901. Really good pro amp. Little old though lol.

 

[TLS Guy]

I made a grave miscalculation, I only need 4.

This is exactly what you need for your application.

Atlas have made this sort of gear for years.

Here is one of many sources of outdoor 70 volt speakers.

 

[Speedskater]

Now four or eight identical 4 or 8 Ohm speakers can be wired in a series~parallel arraignment to provide a good 4 or 8 Ohm load for the 1000Watt amplifier.

 

[highfigh]

Thank Lovin. That clears it up. For his purposes he absolutely needs a 70 volt system. That is the ONLY way to engineer that. The OP can make as many posts as he wants, but he will get the same answer every time.

Why does this need to be a 70V system? He didn't post anything about the distance from amp to speakers. Distributed audio systems are installed with 12-16 channel amplifiers that have standard low impedance designs and they work very well.

 

[highfigh]

I made a grave miscalculation, I only need 4.

You still haven't mentioned distance to the speakers,brand & model of the speakers, output level and size of the rooms or areas. These matter.

Also, "moderate level" and 1000W don't go together unless the speakers are far from the listeners or they're not sensitive (also known as 'power hungry').

 

[TLS Guy]

Why does this need to be a 70V system? He didn't post anything about the distance from amp to speakers. Distributed audio systems are installed with 12-16 channel amplifiers that have standard low impedance designs and they work very well.

Because it is the best, cheapest, easiest and most reliable solution to his problem. This is out side for low powered speakers over some scenic construction. So, it will be mono.

One 70 volt amp will do the job, like I specked. Then he only needs one run of bell wire to the small 70 volt speakers. He sets the tap he needs, and runs the bell wire from one speaker to the next.

This is quick, easy cheap and reliable. That is the most optimal solution for his plans.

 

[Speedskater]

Yep, just mount a small 70V transformer on each speaker.
A large hi-fi power amplifier will drive a 70 Volt system without a special output transformer.