How many watts of power would i need with Pa Speakers?

Q. Im looking in getting basically the cheapest pair of powered pa speakers that would give a decent sound quality in an auditorium

However, this auditorium is 16 million dollars with great acoustics, If someone stands on the stage and talks in a normal voice he/she can be heard in the back row, so i was thinking that we wouldn't need very loud speakers

There are speakers in the suditorium be we are not permitted to use them

Any suggestions or ideas are appretiated


Thank You


Answer
Not sure about your price range or musical needs.
This product is your best realistic solution under $500.

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In the January 9, 2007 issue of the Boston Herald, Tom Rose raves, "The best speaker of the year is Audioengine 5. More than 50 new speakers were put to the test this year, but there wasn't the need for a 'listening-off' to pick the winner. These matching bookshelf speakers, the first product offered by Audioengine, blew away all rivals in terms of audio excellence."
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Designed for optimal ease of setup and versatility, the Audioengine 5 has a built-in power port for iPod charging while listening to your music, watching movies, or playing games. Plug an Apple Universal Dock or iPod directly into the Audioengine Combo Port and you're ready to rock (or roll). The Combo Port charger is compatible with the nano and video iPod as well as all other products that charge via USB.
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With an AC power jack in the rear panel, the Audioengine 5 provides the ability to stream music from your laptop directly to the speakers through Apple's Airport Express. The rear panel AC outlet is also ideal for providing power to other portable and home A/V equipment. A 2nd auxiliary mini-jack is located nearby for audio input from the Airport Express or other products. Also included are plenty of cables in a drawstring bag to connect all your gear.
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subwoofer enclosure specifications?

Q. hi, i asked many of you for a good subwoofer enclosure specifications. no one gave me a good answer.
please anyone suggest me a good enclosure specification for 12" and 10" 1000W Subwoofer for home use.


Answer
I've done this with great success. It's not as easy as, '...3/4" MDF 12"x18.5"x.....place the driver 3.75"from the bottom inside dim...'. There are many factors that make building that cab more involved and rewarding. If you google "subwoofer cabinet design" or similar searches, you will come up not only with designs, dimensions, materials, etc., but you'll learn a lot about sound and drivers (speakers). For example, are you willing to go large on the cabinet? If not, you can design a tuned port "bass reflex hole". This compensates for lack of overall air volume inside the cab. With the right tuning (path that the sound energy takes to exit the cab) at your target frequency, both sounds from front and back of the diaphragm will leave the cab "in phase" for and effortless powerful deep sound. I chose to use volume and size, since it was my garage theater. I used a 15" 1200w sub driver, and built a cab about 22" deep by 24" wide by 26" tall out of 3/4" MDF, and doubled up on the MDF, making the walls 1 1/2" thick. I think it was about 100lbs. With an 1100w bridged mosfet amp strapped on the back, it would make the hair on your arms raise and your body feel the action. I designed it by doing research, learning about "Q" and sound theory. There are many enthusiasts out there who blog and post and share. Build an "active" sub. Good luck!




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