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Old 25th February 2010, 06:53 PM   #1
slopps is offline slopps  United States
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Default DIY Question: t-amp to single driver

I'm building a very simple all-inclusive single speaker using a t-amp. Since I can't bridge the connection since the t-amp is already bridged, is it okay to just plug the single speaker into the right channel?

I'm worried that songs utilizing left/right speaker effects will essentially be cut in half and you won't be able to hear what was supposed to be played on the left speaker. Is this an issue, or no?

thanks a lot in advance!
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Old 25th February 2010, 07:15 PM   #2
Bone is offline Bone  United Kingdom
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You can certainly do that but as you realise any left stereo information will be lost. What you should do is to combine both L & R channels before you connect them to the amplifier.

What is the source you are using as that will determine how you connect the two channels together?
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Old 25th February 2010, 07:20 PM   #3
slopps is offline slopps  United States
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I'm using a Sonic Impact T-amp to connect to a single Fostex full-range driver.
The source is going to end up being an ipod (I'm building a small i-pod dock)

I had planned on bridging the amp channels but I've since read that you can't bridge t-amps. Is that true? I definitely don't want to break anything.
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Old 25th February 2010, 07:52 PM   #4
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A t-amp is already bridged internally.

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Old 25th February 2010, 08:24 PM   #5
slopps is offline slopps  United States
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right, I know they're already bridged internally, so does that mean plugging a single driver into the left channel (for example), that the driver will be receiving the full stereo information for both left and right speakers or it will only be getting the audio for the left speaker only?
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Old 25th February 2010, 10:35 PM   #6
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Sum the Left and Right audio channels into mono before the input to the T-amp.
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Old 25th February 2010, 10:45 PM   #7
slopps is offline slopps  United States
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Ok cool, thank you.
I was gonna house all of this in one unit...amp and speaker all together so it could just be a portable little ipod listening station.
Is there an easy/small chip or something that I can do this with? or is there just some plug adapter for it?

I searched for downmixers but I can't seem to find anything.
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Old 25th February 2010, 10:47 PM   #8
slopps is offline slopps  United States
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I think something like this might work?
Parts-Express.com:1/4" Mono Jack To 3.5mm Mono Plug Adapter | adaptor 3.5mm 1/4" plug 1/4" jack headphone adaptor stereo jack 1/4 jack
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Old 25th February 2010, 11:18 PM   #9
pjanda1 is offline pjanda1  United States
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I wouldn't try using both channels without more research. I assume you are thinking of running the two channels in parallel? Evidently T-amps don't like to have their output - terminals connected. There has been plenty of discussion about this over at Audio Circle, specifically how to connect early Red Wine amps to a subwoofer plate amp that sums the grounds. Of course, you may as well try a single channel first. If it provides enough power, then you needn't mess with two.

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Old 25th February 2010, 11:22 PM   #10
slopps is offline slopps  United States
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I'm not concerned about the power, it should have plenty for such a small setup
I just want to be sure the full signal is going to go to that one driver and not just the left channel. Know what I mean?
I'm thinking about songs that utilize panning from speaker to speaker, like putting the drums on the left speaker and the vocals+guitar on the right, etc etc. I want to be sure this single driver is gonna get both channels sound signal combined.
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