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Old 2nd April 2013, 03:53 PM   #191
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Location: Powell River, BC Canada
Quote:
Originally Posted by Cristi View Post
Ordered the 3116 chips already, I'll start making the design as soon as I get them and decide about the board features. Will be usefull if everyone interested will share his wishes to be taken into account.
That's great to hear Cristi! Thanks for being so responsive/

I already gave my wishes, but upon further reflection I really don't think it needs the on-board power supply. Would just make the board larger than need be for most peoples usage. Speaker protection would be important though.

Thanks again.
Rod
 
Old 2nd April 2013, 10:10 PM   #192
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Default I agree

Quote:
Originally Posted by nwboater View Post
That's great to hear Cristi! Thanks for being so responsive/

I already gave my wishes, but upon further reflection I really don't think it needs the on-board power supply. Would just make the board larger than need be for most peoples usage. Speaker protection would be important though.

Thanks again.
Rod


I agree with you and the other fellows about the on-board power supply. Perhaps Christi could do a separate board for that, with easy hookup to the amp board. Or, at least recommend an appropriate switch mode type power supply that is reasonably priced.

SPEAKER PROTECTION is mandatory! I forgot to request that when I originally chimed in my preferences. So I'm glad you thought of that.

I'd really like to see terminal block type hookups for power, maybe the inputs, and for the speakers.

Mark
 
Old 3rd April 2013, 07:13 AM   #193
kp93300 is offline kp93300  Malaysia
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Hi cristi,
Can i suggest that the input caps and the output inductor uses through hole components to allow for preference.
thanks

kp93300
 
Old 3rd April 2013, 05:53 PM   #194
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Would be interested in TI amp, which can be used with both smps or battery. Getting a battery preamp so would love to try with battery amp.

Thx
 
Old 7th April 2013, 12:15 AM   #195
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What would be nice would be a board with two of the chips to provide 4 channels, or 3 channels with one bridged, or two bridged. I might take two of those.

And another vote for speaker protection here.
 
Old 7th April 2013, 12:10 PM   #196
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Default Clarification

I'd like to add to my earlier suggestions about the design of this.

What I meant by "speaker protection" is just something so there's no nasty "snap" when the amp is turned on or off.

Not some complicated thing that will muddy up the sound.

I'm messing with a tiny (half the size of a credit card) amp now, that is really good and is just about as simple as can be. Great sound and no "snaps" either. See this if interested:

http://www.diyaudio.com/forums/class...han-lunch.html

I'm not trying to hijack this discussion. Just using my $6 as an example of simplicity with goodness.

I think it would be great if the proposed amp was built as close as possible to the way Texas Instruments envisioned it, with possibly some extra capacitance as XRK and others are experimenting with on the other thread here at diyAudio.

The power supply should be a separate thing in my opinion. Trains of thought differ so much on this. Wouldn't it be best to just have the audio board easily rigged to the power board or a simple switch mode computer type power supply?
That way if the power supply ever failed, the audio board won't be just tossed away.

Keep it simple. Let's not make this a designed by committee affair -- a "mix" radio station, if you will, that isn't good for anything. Let's ROCK from the beginning, then let the folks who think everything HAS to be modified do as they will.

My feeling is I let the people at say, Texas Instruments, who are way smarter than I prevail and pretty much leave things stock. Unless a DIY wizard can prove the original designers compromised something because they needed to achieve a price point, etc.

Mark
 
Old 7th April 2013, 12:59 PM   #197
blossom is offline blossom  New Zealand
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Quote:
Originally Posted by goosewing View Post
What would be nice would be a board with two of the chips to provide 4 channels, or 3 channels with one bridged, or two bridged. I might take two of those.

And another vote for speaker protection here.
I think this can be achieved with 2 boards no?
 
Old 9th April 2013, 12:37 PM   #198
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Quote:
Originally Posted by blossom View Post
I think this can be achieved with 2 boards no?
It certainly could, but then there are two boards (or in my case four) to build, and if they are to share power supplies the question of whether there will be intercation between them or not.

I think there is a market for mono/stereo amps and a market for multi-channel. This low powered chip does suit mult-channel/active setups well I think - and in my case I would like a single board per (3 way) speaker if I can get it.
 
Old 12th April 2013, 08:40 AM   #199
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Guys, I collect all the suggestions and start making a prototype first. if the results are good, a second prototype using two IC's will follow soon.
__________________
www.connexelectronic.com complete assembled amplifier and SMPS
 
Old 12th April 2013, 08:44 PM   #200
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Quote:
Originally Posted by Cristi View Post
Guys, I collect all the suggestions and start making a prototype first. if the results are good, a second prototype using two IC's will follow soon.
Thanks very much for moving ahead on this. Will be looking forward to your reports on it.

Cheers,
Rod
 

 


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