Class D SDS-254 Break In Period? - diyAudio
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Old 22nd May 2011, 02:11 PM   #1
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Default Class D SDS-254 Break In Period?

Hi everyone! I searched the forums and could not find one that addressed break in times for SDS-254?!?

I purchased mine about a week ago and it really doesn't sound that great with about 75 hours on it.

I am running a Dodd Buffer and both amp and buffer are "off the grid"

Any feed back would be apreciated.

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Old 22nd May 2011, 04:59 PM   #2
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I am not convinced a class d breaks in.
This is because it is just PWM which is hard switched.
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Old 22nd May 2011, 05:06 PM   #3
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Hmmm???? Then I don't know if I'm that impressed with what I'm hearing right now.
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Old 22nd May 2011, 05:27 PM   #4
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Quote:
Originally Posted by kregg007 View Post
Hmmm???? Then I don't know if I'm that impressed with what I'm hearing right now.
Might be worth doing a sweep with a signal generator and scope see what the response is like.

I am very happy with my class d amplifier.
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Old 23rd May 2011, 05:28 AM   #5
luka is offline luka  Slovenia
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I would say your ears need to break in LOL
also depends on amp, maybe is no good one, I don't know it
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Old 23rd May 2011, 09:59 PM   #6
HiroPro is offline HiroPro  Canada
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kregg007 what PSU solution are you using? PSU can have a PROFOUND affect on an amplifier especially if it can provide the needed current.

Last edited by HiroPro; 23rd May 2011 at 10:02 PM.
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Old 23rd May 2011, 10:08 PM   #7
HiroPro is offline HiroPro  Canada
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The only negative reviews I've heard involved people trying to use the amps with PSUs and speakers the unit can hardly drive. For example a guy was on here complaining about CDA-224 not driving his Magnepan 3.7 Also he used his own PSU with capacitance less than the PSU option shipped with CDA-224

This is hardly an accurate representation of what the amp offers... but the gentleman simply assumed the classdaudio amps have poor SQ... foolish assumption...

Single ended or double? If single is your jumper set inverted on non? Perhaps you have the input wired incorrectly and/or gain pot set poorly. What speakers are you drying to drive with it?

The SDS-254 requires +/- 40 Volts DC to +/- 50 Volts DC Is this what your DC-DC battery PSU is providing?

I'd drive to power the module with a decent caliber SMPS over a battery setup.

Last edited by HiroPro; 23rd May 2011 at 10:18 PM.
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Old 25th May 2011, 07:01 PM   #8
bigdh31 is offline bigdh31  United States
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I ordered the SDS-254 kit which included a linear power supply. It sounded good when I first turned it on. I do not think it has changed much over time.
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