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Old 3rd July 2007, 11:51 PM   #1
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Default Using SI T-amp with a single speaker?

I've previously build myself a little potable speaker using cheap parts and a somewhat ghetto approach

it consisted of a cheapy 5" coaxial speaker & amp from maplin in a custom box powered by 8 d cell alkalines

but now i've been wanting to improve upon it and my serches for a suitable amp to power it has lead me to discover the si t-amp. after reading several threads here it seems others have already used this for similar projects.

the one difference being all the other builds have been using multiple drivers and both channels of the amp. I was planning to only use a single channel with a car co-axial speaker either 4" or 5" in order to keep the size down.

so my questions are

will the t-amp happily drive a single speaker using a single channel. I understand that it already bridged so i wouldnt gain any more power by doing so

the other being how is this best achieved and what is the best way of turning a stereo input into a mono one

cheers in advance
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Old 4th July 2007, 12:12 AM   #2
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Since you are going to use a coaxial driver, try and find one that you can power the tweeter/mid separately. This way you can use one channel for each driver.
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Old 4th July 2007, 07:40 AM   #3
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Hi,
I haven't seen Maplin selling a Co-axial driver before.
He probably means a full range with a whizzer rather than a true co-axial (with a separate tweeter).

It might be worth considering this as a T-amp alternative: Best value T Amp in UK ?

It's worth a read anyway! 20 with a power supply (and speakers).

Regards,
Martin

EDIT: Sorry, did you mean that you bought the speaker AND amp from Maplin or just the amp? I'm getting confused.

Anyway, is it a full range speaker or a true coaxial design with separate tweeter connections?
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Old 4th July 2007, 08:15 AM   #4
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ah sorry if things arent so clear. the speaker was a 5" car audio coaxial so its only got a single connection. The 1st attepmt was more messing about than anything. i'll be starting from scratch

my main concern is whether there are any issues or things to consider if i was running a t-amp using just a single channel

I did have a look at the post you linked and it could be a decent alternative.
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Old 4th July 2007, 08:22 AM   #5
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A car coaxial, if it has a seperate tweeter, could be wired as Mr anonymous said:

Quote:
Originally posted by theAnonymous1
Since you are going to use a coaxial driver, try and find one that you can power the tweeter/mid separately. This way you can use one channel for each driver.
The tweeter will probably have a capacitor connected to it (to block damaging low frequencies).

Could you disconnect that capacitor from the main speaker (leaving it attached to the tweeter) and connect the second channel of the T- amp to the capacitor?
This would give the result that theAnonymous1 is referring to.

Regards,
Martin
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Old 9th July 2007, 11:38 AM   #6
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You should also disconnect the tweeter ground, the speaker output on a T-amp doesn't use common ground. Both negative speaker outputs should be kept separated...
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