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Best Solid State Amp? < $500 - Page 2

post #16 of 17
It should be important. Wall-warts can never deliver the quality power of a dedicated PSU box. The bad news is that the sigma is $200. The good news is that it's a la carte, you can buy one later.

I don't quite have the cash for the Sigma, so I'm waiting on it and using the wall wart. I don't doubt the M3 needs a good power supply, it has a lot of goodies inside that are thirsty.
post #17 of 17

Quote:
Originally Posted by scootermafia View Post

It should be important. Wall-warts can never deliver the quality power of a dedicated PSU box. The bad news is that the sigma is $200. The good news is that it's a la carte, you can buy one later.

I don't quite have the cash for the Sigma, so I'm waiting on it and using the wall wart. I don't doubt the M3 needs a good power supply, it has a lot of goodies inside that are thirsty.

 

The M^3 can probably perform better with a wallwart than most amps could.  The class A biasing will require a lot less transient current than a B or AB design, it has some pretty hefty rail capacitors, and the more sensitive components use a capacitance multiplier.  A wallwart is still going to have a lot of ripple and noise, though, and a high output impedance compared to a better supply.  I'm not saying a wallwart is fine, just that the M^3's design is solid enough to isolate it fairly well from a less-than-stellar PSU.  

 

In my mind, it comes down to either using a wallwart or a o11; if you're going to upgrade from a wallwart, there's no good reason not to spring for the best.  I built my M^3 before the o11 was around, so I used a STEPS supply.  A o11 would be better, but it's probably not worth the upgrade right now for me.  

 

If the $200 for a o11 puts you off, you could always build one yourself later.  I have a BOM that comes out to about $70 before shipping, so no more than $100 or so if you DIY.  It's a pretty straightforward project, though you do need to be careful when you're working with AC mains.

 

Quote:
yea i was actually wondering how much of an effect the Sigma 11 would have. if it's worth the money i'll get the packaged deal with that PSU.

 

The change in specifications is definitely pretty big...that is, the difference in the specs that matter between a wallwart and a o11 are measurable and significantly favor the o11.  From an engineering standpoint, it's a solid upgrade.  Subjectively, I'm not sure if it would be a ~50% upgrade over the M^3 with a wallwart (a $200 PS for a $375 amp), but it's pretty rare to find a upgrade that tracks 1:1 with cost.  In summary, the o11 is measurably superior by a large margin, but the subjective improvement is very...subjective.  biggrin.gif


Edited by johan851 - 11/16/10 at 12:00pm
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