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Old 31st July 2007, 04:44 PM   #1
inrank is offline inrank  United Kingdom
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Default Mono Battery powered Amp

not sure if this is the right area to post this, but...

i want to make a portable retro style 'boom box' with a single 10" Hawthorne Audio Silver Iris driver, that accepts a 3.5mm input from a portable DAB/ Ipod etc. just needs a volume control and a single output to the speaker.

anyone know of any cheapish Mono Battery amps, preferably in a kit or something

any ideas?
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Old 1st August 2007, 11:30 PM   #2
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The specs on that speaker show that it can handle 150 watts (http://www.hawthorneaudio.com/drivers.htm). I'm not sure that you'll be able to drive it as a boom box with a battery powered amp. Perhaps I've misunderstood your post.
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Old 1st August 2007, 11:36 PM   #3
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Quote:
Originally posted by marthaman
I'm not sure that you'll be able to drive it as a boom box with a battery powered amp.
That has *nothing* to do with it. That is a high efficiency driver, it is actually a great choice for a low powered amp application.

Back to the original question, you can make a decent battery amp out of several of the National amp chips, but of course there are plenty of kits too. Do you prefer kit or scratchbuilt?
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Old 2nd August 2007, 09:26 AM   #4
inrank is offline inrank  United Kingdom
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well ive never made an amp before, just diy speakers really, so kit is best bet
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Old 2nd August 2007, 09:41 AM   #5
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Any reason you can't use a T-amp or a tripath based kit and parallel the channels? It would save a lot of battery for you.

My first boombox was a mono one built around this amp:

Click the image to open in full size.

It's $15 from www.brinck.dk (it's the BR320, and is 17watts mono into 3 Ohm @ 14V) but I'm sure you easily find another kit cheaper, or just bird's nest one.

My boombox since evolved into this:

The Boominator - another stab at the ultimate party machine
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Old 13th November 2007, 11:25 PM   #6
seek is offline seek  United Kingdom
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I'm wanting to do something similar. Basically, the idea is to make a luggable boombox-type-thing.

The starting point is going to be a JBL Control 1 (4 ohm, 150w rms). I'd then like to squeeze a class-d (class-t?) amp module and a lithium polymer (so 11.1v or 14.8v) pack inside the speaker case.

As I understand it, tripath amps cant be bridged. Anyone have any recommendations for amp modules?
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Old 13th November 2007, 11:25 PM   #7
seek is offline seek  United Kingdom
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I should probably stress that I am by no means experienced in working with electronics so a nice ready built module is definitely preferable
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Old 21st December 2007, 06:46 PM   #8
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It's not actually a single driver. For full range, it seems that they turn it into a coaxial by mating it to an HF driver with a crossover. Since you can't bridge a Tripath, you could use one channel to drive the LF and the other to drive the HF with an PLLXO at the inputs.

:)ensen
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Old 21st December 2007, 10:21 PM   #9
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Most simple is buy a car amp then power by car battery
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