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Class D Switching Power Amplifiers and Power D/A conversion

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Old 3rd November 2012, 04:15 PM   #21
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Join Date: Jul 2004
Location: Mountain View, CA
You're welcome

There's a Connex subforum in the Commercial Sector forum, and there are reviews on Cristi's (Mr. Connex) site as well.

I've got 11 modules on order (8 CxD300 and 3 CxD250), and waiting on Cristi's new SMPS.
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Old 3rd November 2012, 04:18 PM   #22
Join Date: Jan 2005
I got a reply from sure electronics, they have gotten one report about overheating output inductors apart from the one i sent in, so they tested a batch of amps and could not recreate this issue.

They also say they will send me a new amp.
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Old 3rd November 2012, 06:09 PM   #23
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Join Date: Oct 2012
Default Sure is much nicer than a norwegian would expect...

Sure sounds trustworthy in english but means sour or bad in norwegian he he.

Sure is soon ending a 40%-off campain and I think I'll buy the 250Wx2 amp. Its only 41$ now. The 125wx2-same chip similar-looking model is 37$. I already bought a Tripath-TK2050 based board 2x100w/4Ohm 29$ now, sounds better than all my other amps! Very detailed. I have also another non-Sure TK2050 board but it sems unstable (went up in smoke) LT-50 TK2050 Digital Amplifier 50W+50W BTL 100W Amplifier Board LCM-1 $17.19 Free Shipping

The 125wx2-same chip similar-looking model as the one in this thread is probably a non-bridged version. Or what is the difference (both needs ca 60V 7,5 A x2, cant be right?).

Anybody knows how to reduce power on the 250Wx2-model ie use lower voltage, maybe 40vx2?
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Old 3rd November 2012, 06:40 PM   #24
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Join Date: Oct 2012
BTW Sure prints a low $-value on package. Sale is good: 40% off on many models- I think Tripath-chip-models sounds really good.

Can I just replace some Zener diodes to have this 250wx2 amp work (well but with less wattage) on maybe 38vx2? I guess I only need the 125w version but the 250w is only a few $ more and if it could be downgraded only with less power supply...
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Old 3rd November 2012, 06:55 PM   #25
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Join Date: Oct 2012
Tekko: Is it possible to bend the heatsink over a bit to make the amp lower\smaller, maybe as low as the capacitors? And should one replace the "risky" chinese caps?

Last edited by Sofus2; 3rd November 2012 at 07:18 PM. Reason: --
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