@erik_squires wrote:
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Not saying that part cost is the determinant factor in sound quality but rather that a DIYer has significant incentive to achieve excellent results which would otherwise be out of their reach.
Also, I have long ago given up the belief that $$$$ means quality or desirability for me. Sometimes more expensive is better but many times it is not. A true audiophile in my mind can tell the difference.
+1
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I remember what the late Peter Snell achieved with cheap drivers in the AII's. It wasn't a case of luck or "one in a million," but rather careful selection, great implementation and design. He spent money and effort where it mattered sonically, not that the AII's were cheap per se, but by today's standard I'd wager they were.
I bought my studio installation amps 2nd hand. Their "audiophile" edition aimed at the hifi market, acquired new, sets one back 20x as much compared to what I shelled out per amp, and yet they're essentially similar in construction and overall execution. I heard them head to head, and they are indeed virtually similar sounding. Where they weren't by a smidgen you'd fool yourself believing the hifi edition was necessarily preferable. Believe me, it was splitting hairs.
The need for über-built amps from the likes of D'agostino and others would appear to be grown mainly from hideously difficult "highend" speaker loads, passively configured with complex crossovers with a sponge-like ability to suck up power. Talk about bottleneck effect and nurturing a select segment of amp business. A friend of mine uses two bridged studio amps (very similar to ones I use) for a total of 3.6kW per channel into notoriously difficult-to-handle passive speakers. Now there's power in reserve, as there should be for any desired SPL, as well as a sound more freed and less restrained, but it took a whole lot of (quality) power to get there.
On the other hand remove the passive crossover for active configuration, as another friend of mine did with similar speakers, and it meant the world in harnessing even higher potential from the associated amps - as well as, in effect, the speakers themselves. It means seeing what you have potentially thrive sonically this way, significantly so.
DIY grants the opportunity to realize designs that aren't readily available commercially, if at all - let alone at prices that are within grasp to "mere mortal." Skewing the typical segment of audiophile products can save you a lot of money - requiring an open, unbiased mind, that is. Buying 2nd hand, obviously. Going outboard active is also an element of DIY. Don't indulge in the audiophile market and its mechanisms. Challenge it; go rogue, and let the ears do the talking.