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Suggestions for a truly wireless speaker?

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Posted on September 30, 2014 at 17:33:39
Donny Bahama
Audiophile

Posts: 9
Location: So. Cal (Oceanside)
Joined: October 30, 2008
I need to build a mobile demo system with 5.1 surround sound. The receiver and sub will be built into a cart but I'm looking to build some completely wireless (i.e. battery powered) speakers. Obviously, some of the newer T-amps are very efficient so that seems a good place to start, but in the interest of getting good battery life while also attaining good SPLs,I thought it appropriate to ask for input in this particular forum.

Parameters:
1. Cost *IS* a consideration here. This is not a "money is no object" kind of project. Cheaper is better as long as it's efficient/loud and sounds good.
2. Sound quality doesn't have to be audiophile-caliber but does need to be good to very good.
3. Size is definitely a consideration. The speakers need to be roughly "small bookshelf" sized - somewhere in the range of 12Hx6Wx6D or smaller
4. I'm not opposed to using a separate, small box housing the amp, wireless receiver and battery if there's an existing high-efficiency speaker that would be a good candidate -- but I would prefer to build something and have everything enclosed in one cabinet.
5. Because there will be a subwoofer in the system, LF response isn't a big deal but I do want something that's dynamic and "punchy".

I know I'm posting to a speaker forum, so I don't expect a lot of input on the amplification, wireless transmitter/receiver and/or battery technology - but such input is certainly welcome.

 

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RE: Suggestions for a truly wireless speaker?, posted on September 30, 2014 at 22:57:07
djk
Manufacturer

Posts: 6135
Joined: June 17, 2000
"if there's an existing high-efficiency speaker "

Efficiecy is proportional to size, a "12Hx6Wx6D or smaller" speaker cannot be high efficiency (unless it has nothing below about 200hz).

 

RE: Suggestions for a truly wireless speaker?, posted on October 1, 2014 at 08:56:34
weltersys
Industry Professional

Posts: 685
Location: FL
Joined: September 28, 2004
There are a number of options at Parts Express that are probably cheaper than the parts purchased individually.

http://www.parts-express.com/cat/wireless-bluetooth-speakers/101

 

RE: Suggestions for a truly wireless speaker?, posted on October 1, 2014 at 09:30:07
Donny Bahama
Audiophile

Posts: 9
Location: So. Cal (Oceanside)
Joined: October 30, 2008
The only "truly wireless" option there is the cheesey little "portable Bluetooth" speakers "for smartphones tablets and laptops" Everything else has to be plugged into AC.

 

RE: Suggestions for a truly wireless speaker?, posted on October 1, 2014 at 09:31:45
Donny Bahama
Audiophile

Posts: 9
Location: So. Cal (Oceanside)
Joined: October 30, 2008
Ok, I guess I'll have to go a little larger. I can live with an f3 of 150Hz.

 

RE: Suggestions for a truly wireless speaker?, posted on October 1, 2014 at 10:39:35
Paul Joppa
Industry Professional

Posts: 7296
Location: Seattle, WA
Joined: April 23, 2001
I assume this is OK, since the design is offered for free. It is a design we've had on the Bottlehead web site for some years:

http://bottlehead.com/s-e-xy-speakers/

The design gives a cutoff of 125Hz at a QT of about 0.5 - quite suitable for a subwoofer. Efficiency is about 94dB/m/w.

A T-amp or similar should be adequate.

 

RE: Suggestions for a truly wireless speaker?, posted on October 2, 2014 at 10:27:49
Donny Bahama
Audiophile

Posts: 9
Location: So. Cal (Oceanside)
Joined: October 30, 2008
That looks perfect! Thanks very much, Paul!

 

RE: Suggestions for a truly wireless speaker?, posted on October 2, 2014 at 17:06:35
bcguitar
Audiophile

Posts: 1328
Location: Maryland
Joined: March 2, 2005
I forget who but someone makes a little wireless D class amp but you would still have wires to the speakers.....

 

RE: Suggestions for a truly wireless speaker?, posted on October 3, 2014 at 08:12:51
Hornlover
Manufacturer

Posts: 2529
Joined: March 8, 2002
These Dayton wireless 'T' amps can run from batteries.

 

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