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Old 11th June 2013, 03:52 AM   #11
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I see 3 wires for the signal, and 2 wires for the power, though there is the common ground.

For star ground, simply bring all the ground wires to one point. As it, I think there are 5 ground points, which raises the possibility of hum.
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Old 11th June 2013, 03:27 PM   #12
LBKosmo is offline LBKosmo  United States
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So you're saying I should tie all the negative ( - ) wires to one point regardless that this is a two wire circuit and does not have an earth ground as would be found in a three-wire circuit?
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Old 11th June 2013, 07:06 PM   #13
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Beware that the speaker output marked - (minus) on your diagram may not be the same - as everywhere else. It may well be a bridge amp with floating load so don't connect the speaker - points together or to anything else.

The input grounds and PSU grounds (yes the - becomes "ground" in a single rail amp probably are the same point but check first before doing anything.
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Old 11th June 2013, 10:13 PM   #14
LBKosmo is offline LBKosmo  United States
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Thanks for the information Mooly!

This is my first build so I appreciate the help from everyone.
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Old 20th June 2013, 05:27 PM   #15
prezden is offline prezden  Canada
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Just a thought on your choice of the TPA3110 amp.
I have built small portables with this amp and the TA2024 and the TPA3122. The 3110 does not compare to the 2024 and 3122 amps (all from Sure). With a few mods the 2024 or 3122 can sound really good in a small portable. They both work well with a 12V Lion battery pack for portability. This of course is just one person's experience and others may have some different thoughts.
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Old 20th June 2013, 06:14 PM   #16
Octavia is offline Octavia  United States
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Hmm Prezden, when you say the TPA3110 amp does not compare to the 2024 and 3122 amps can you be a little more specific as to what you find the differences to be?
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Old 20th June 2013, 09:39 PM   #17
prezden is offline prezden  Canada
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The 3110 is 8W whereas the 3122 and 2024 are both 15W. Beyond the I'm not technically savvy enough to say. Sound wise at least to my ear the 2024 and 3122 have a much fuller, louder sound. I modified both the 3122 and 2024 with larger and better quality power caps.
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Old 20th June 2013, 09:53 PM   #18
LBKosmo is offline LBKosmo  United States
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I plan on using Visation FRS-7 (Link) speakers and they are rated at 8W/15W Max. Would I be OK running these using either of these boards:

Sure Electronic's TA2024 2x15w

Parts-Express Brand TA2024 2x15w
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Old 20th June 2013, 10:00 PM   #19
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I've seen other comments on the TPA3110 being sonically better than the tripath. With efficient speakers 8w vs 15w shouldn't really mean all that much. I don't have any direct comparison although I have the dayton tripath with to me sounds quite good although not quite up there with my el84 tube amp. At $10 I think I'll pop for a 3110 and see for myself.
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Old 20th June 2013, 10:21 PM   #20
LBKosmo is offline LBKosmo  United States
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I think I am going to stick with the TPA3110. It's nice and inexpensive, and I think will fit my needs for this small project. I've read it sounds great as well.
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