T-amp for guitar busking/portable PA - diyAudio
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Old 23rd January 2010, 01:20 PM   #1
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Default T-amp for guitar busking/portable PA

I've been tempted to buy one of the Dayton T-amps, put it in a cab with 2 tiny 4 ohm speakers (maybe Jensen 6" Mods) and use it as a battery powered guitar amp (and occasional PA). Anybody here do something like that and have thoughts or advice?
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Old 24th January 2010, 07:33 PM   #2
gfiandy is offline gfiandy  United Kingdom
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I don't think I have seen anyone do that exact configuration, can't see why it wouldn't work though.

This thread has alot of information on this kind of build as a portable party system.
The Boominator - another stab at the ultimate party machine

T-Amps typically are about 20W max so the larger the speaker you can fit in the better as they are usually more efficient. If you don't need alot of bass then small PA speakers would be ideal. But at the size you are talking about you will probably need to compromise on level to achieve some bass.

Regards,
Andrew
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Old 29th January 2010, 02:56 AM   #3
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Yes, absolutely, you should do something like this.

As noted, the Boominator thread has lots of good info, so get a beer and read through it.

The Tripath 2020 chips will give you a bit more power than the 2024 chips in the Dayton SI boards. Either the 41hz Amp6 (kit) or the boards on eBay from arjenhelder (assembled) are recommended, although there may be other OK modules available.

As for speakers, do try to match the driver to the size and geometry of the box(es), and don't just arbitrarily stick speakers in a box. Do a little searching on your driver of choice and you may be able to take advantage of somebody else's effort to get the thing to sound good, or go to a site like Zaph's (Zaph|Audio) to check out well-designed speakers. Even though you are making a portable, you can use the geometry of tried and true speaker designs and rearrange them to work for your portable.

Then, of course there's the matter of batteries, charger, nuclear power source, self-propulsion and all the rest, so this could grow into a complicated project, but the good news is that you can work on it one stage at a time, and eventually, you will have a show-stopper.

--Buckapound
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Old 30th January 2010, 02:48 AM   #4
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Now I'm really getting "out there". I just bought a couple of 8" Neo speakers. I plan to buy some cheap Lowes Sonotube, probably the 12" version, model with the Sonosub program and tune to about 75 Hz, use some toilet paper roll ports and MDF ends, fill loosely with Acoustistuff, and make 2 tubular "speaker cabs". I'm expecting each cab to weigh about 6 lbs each. I'll use those with a T-amp when I need a tiny PA outdoors or to mic my classical for a wedding when its hard to find a nearby outlet, and with my Crate Powerblock when I need a superlight and portable but fairly high output guitar amp. It should be a while before I get it all together, but I'll try to remember to report back.
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Old 13th January 2011, 08:53 PM   #5
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Default Here is my 10" system.

Quote:
Originally Posted by Racket Scientist View Post
Now I'm really getting "out there". I just bought a couple of 8" Neo speakers. I plan to buy some cheap Lowes Sonotube, probably the 12" version, model with the Sonosub program and tune to about 75 Hz, use some toilet paper roll ports and MDF ends, fill loosely with Acoustistuff, and make 2 tubular "speaker cabs". I'm expecting each cab to weigh about 6 lbs each. I'll use those with a T-amp when I need a tiny PA outdoors or to mic my classical for a wedding when its hard to find a nearby outlet, and with my Crate Powerblock when I need a superlight and portable but fairly high output guitar amp. It should be a while before I get it all together, but I'll try to remember to report back.
http://lh6.ggpht.com/_yKKUFHQ3jAc/TH...oom%20bike.JPG

Neo 10" drivers and a Pizzo array, 14lbs each and (loud enough) with a $50 sure T-Amp Not what I would consider "portable" off the bike anyways.

It is not easy to build a "Pro" speaker for less than you can buy one and I consider myself a expert at building cheap speakers, after the drivers, X-over, handles, jacks, wood,corners and grilles you need to fur/rhynolite it. Quite often a used Pro speaker will sell for less than you can buy the drivers for.
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Old 13th January 2011, 10:53 PM   #6
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Yes, why not, it'll probably make better use of your battery than the 7 Watt TBA810S one I built about 15 years ago, but you may want to include some kind of sound shaping like a Behringer V-Amp or Tech 21 SansAmp at the front end as the overall sound will probably be a bit too clean and clinical for guitar.

TBA810S busking amp with 15 4AH nicads:-

tba810s.jpg

w
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Old 14th June 2011, 10:18 PM   #7
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I think its a brilliant idea. Take a look here:

Battery-powered "Busking" amp.

Please let us know your progress.
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