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Old 30th August 2012, 12:22 AM   #31
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I have no problem w/ bass or treble. The TBI is similar to the eval board in terms of component values as far as I could tell.
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Old 30th August 2012, 12:41 AM   #32
kp93300 is offline kp93300  Malaysia
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What is the voltage of the power supply input in TBI?
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Old 30th August 2012, 12:41 AM   #33
fakeout is offline fakeout  Canada
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Quote:
Originally Posted by wushuliu View Post
I have no problem w/ bass or treble. The TBI is similar to the eval board in terms of component values as far as I could tell.
This may sound like an ignorant question but is the eval board something you can just hook up to a power supply and the speakers and get it going right away?

I figured maybe it would be cheaper to build a board myself but I'm not done reading on electronics and I think I might try simple "hook ups" to start.
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Old 30th August 2012, 12:43 AM   #34
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Quote:
Originally Posted by kp93300 View Post
What is the voltage of the power supply input in TBI?
?

Similar to the eval board: 12-24v
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Old 30th August 2012, 12:47 AM   #35
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Quote:
Originally Posted by fakeout View Post
This may sound like an ignorant question but is the eval board something you can just hook up to a power supply and the speakers and get it going right away?
Yes.
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Old 30th August 2012, 02:11 AM   #36
kp93300 is offline kp93300  Malaysia
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Hi Wushuliu,
what is the power supply you use?
I am surprised at my finding when compared to Trend audio .
regards
kp93300
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Old 30th August 2012, 02:30 AM   #37
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I use a Meanwell 24v SMPS at 25.8v. I have also used batteries and compared with the TBI and although the TBI sounds a little bit better (due to the buffer?) I did not hear any kind of rolloff... Have you played with the gain?
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Old 30th August 2012, 02:51 AM   #38
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The value of the inductors is a little too high for my taste; I used 18uH with good results on the boards I built.
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Old 30th August 2012, 02:56 AM   #39
kp93300 is offline kp93300  Malaysia
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I set the gain at 26 db. Tried a buffer and didnot improve bass and treble.
Vocal has a tube type of sound and is good with the eval board..
I notice that the board use 1uf smd ceramic input caps . The Texas chip is smaller than the Tripath chip.

Hope all this will improve with more cap burnt in.

cheers
kp93300
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Old 30th August 2012, 03:35 AM   #40
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Sounds like something to look at. I'd replace the ceramic input caps with some polypropylene caps. Maybe of slightly larger values too (2.2uF?).
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