Hello to you all.

I hope that one of you can help me here but what is the loudest battery
powered, non-Ipod docking, portable speaker system that you know of?

All of the ones I can find seem to level off at only 3 Watts per
channel like the PowerTraveller K2000.

Any suggestions?

Cheers,

J

In article .com,
The Fuzz wrote:
I hope that one of you can help me here but what is the loudest battery
powered, non-Ipod docking, portable speaker system that you know of?

All of the ones I can find seem to level off at only 3 Watts per
channel like the PowerTraveller K2000.

There are a variety of battery powered reasonably powerful amp/speakers
available in the pro market, but of course use many large capacity
re-chargeable cells so are pretty expensive, large and heavy.

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*Great groups from little icons grow *

Dave Plowman London SW
To e-mail, change noise into sound.

You did say you where a soundman didn't you ?

Not heard of watts equal v squared over r ?

eg an amp powered off 9v battery into an 8ohm spkr will give almost 10w
providing it can draw enough current and can drive rail to rail. Does your
outboard have a generator that can charge a car battery ? you could mount a
cheap car radio cd player that supports mp3's or even has an input for an
ipod which would be good for 20w/channel.

Pete

Pete Cross wrote:
You did say you where a soundman didn't you ?

Not heard of watts equal v squared over r ?

eg an amp powered off 9v battery into an 8ohm spkr will give almost 10w
providing it can draw enough current and can drive rail to rail. Does your
outboard have a generator that can charge a car battery ? you could mount a
cheap car radio cd player that supports mp3's or even has an input for an
ipod which would be good for 20w/channel.

Pete



Sounds like you have mistaken 9v DC for 9v AC. Quite a difference. An
amplifier running off a 9volt rail can output 8v p-p at best (2xVbe have
to be taken off the maximum rail voltage). 8v p-p is 2.83v rms which
into 8 ohms is 1W. There are techniques used involving DC-DC converters
which can increase the rail voltage, bridge connection and/or output
transformers which reduce the load impedance as seen by the amplifier,
but for a straight single-ended transistor amplifier driven from a 9v
rail, 1W is the best you'll get into 8 ohms.

S.

In article ,
Pete Cross 1@2 wrote:
eg an amp powered off 9v battery into an 8ohm spkr will give almost 10w
providing it can draw enough current and can drive rail to rail.

You jest? The most you can get into a 4 ohm speaker from a car battery at
13 odd volts is approx 5 watts. Unless you go for bridge outputs.

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*When you've seen one shopping centre you've seen a mall*

Dave Plowman London SW
To e-mail, change noise into sound.