Hi Stuart,
Quote:
My experiments with power cords and interconnects have had more influence on tonality and soundstaging than the grill mod did.
I was doing a lot of talking to myself during this process....mostly mild expletives about how in the heck this can change the sound so much.
This post reveals you that you've been around the block and then some!
As a relative newcomer to Head-fi (four years and counting), it seems that all the people who are making the most sense, in the comments they post and impressions they share, eventually touch the subject of power conditioning and reveal that they are big believers of the influence clean power and good power cables can have on sound quality.
It's like a secret known only to the oracles of audio, and yet it's not a secret - it has been disseminated far and wide, only to be dismissed by the masses as some kind of old wives' tale.
I point to the success of Stanley Beresford's strategy of offering relatively inexpensive DACs with integrated headphone amps, that (I argue) are affordable, in part, because they include very modest (inexpensive) power management components. The sonic success of his gear is actually dependent on his customers subsequently following his advice to replace the included switch mode PSU, with an external rechargeable battery pack (which he neither includes nor sells.) And, for his
Bushmaster MkII, at least, he even offers a $15 upgrade to an 18-pin PIC chip, reprogrammed specifically for use with the assumed cleaner power of battery packs.
To a number, it seems that everyone who gets a battery pack hears an immediate improvement (varying with the quality of power they had been pulling from their AC outlet and the resolving power of downstream components) but these same people get an even lower noise floor, greater detail and transparency, when they then upgrade to the reprogrammed chip - which he strongly advises should not be used with the switch mode PSU on AC power. I conjecture that the original chip has been programmed, not covertly, but rather out of necessity, to intentionally "smear" the noise that typically comes in from an AC outlet through the switch mode PSU he ships, where his reprogrammed upgrade chip removes that "filter" on the assumption that the battery power is going to be much cleaner than what one would typically get from an AC outlet. If you tried to use the "battery" chip in a
Bushmaster MkII that's on AC power, your sonic quality could vary wildly, depending on the quality of that AC power.
All said and done, Beresford is saving his customers a lot of money by offering gear that's actually designed to perform at its best with $100 battery packs - instead of including $300 or more worth of power conditioning components in every chassis. He openly promotes upgrading to battery packs, but gives you a way to run without them, if you prefer.
Contrast Beresford's approach to something like the far more expensive CEntrance
DACmini CX, which basically
re-manufactures the power coming into it, accepting any DC voltage in the range of 9V to 19V, as long as it can deliver at least 2 Amps of current. The power supply built into the
DACmini CX (and the
DACmini PX) are a significant portion of their cost. Even the CEntrance
DACport USB-powered DAC/amp includes
five separate power supply circuits to clean up and distribute the noisy power that typically comes from laptop and PC USB ports.
I love what Vinnie Rossie (of RWA) has done with his new
LIO modular DAC/amp that's powered using "ultra capacitors" - better than batteries. But its price is out my league in price, sadly.
I'm a believer in clean power, so here comes a question: If I wanted to spend $1000 on power conditioning, for no more than 500 Watts worth of 120V AC gear that cannot be battery-powered, what would you recommend? (I know that's burdensome, given all the many possibilities, but I would really appreciate your input.)
Thanks!
Mike