Hi Steve
Really not trying to belittle you in anyway, just pointing out that in my opinion the use of the linear power supply probably will not improve things and least of all he bass. Having said that I respect your opinion and have suggested others to give it a try and see if they can do an instant A/ B- preferably with someone who really does not care (say your wife) doing the swap and not telling you whats A or B. In addition doing this say 10 times with random A and B.....see if you can pick it. If you can pick it on this blind test , then I really will take notice and do something.
Pretty well every bit of circuitry we do/ change is evaluated on this basis as we also have done on comparisons against discrete systems and other matrix systems. For example we could have just shot for really high channel separation numbers but it sounded worse that the current numbers. All done on A/ B testing.
Remember years ago it was all the rage to paint a green coating on the outside of CD's, people were swearing that the difference was obvious. I tested it with 2 identical CD players time synched and it was ZERO difference. Same can be said on things like "audiophile capacitors, speaker cable , 16 bit vs 21 bit etc. I remember years ago "Wireless World " did a big comparison on speaker cable ranging from cheapo to crazy expensive- the winner was lawnmower cable at around 2 pound per meter!!!
After you either spend a lot of time on some audio modification or spend big$$$$ on some stellar equipment it is difficult to mentally tag it as a flop, that's why I insist on careful instant A/B if possible. The biggest differences in audio by a mile is speakers and how the speakers couple to the room and its not about frequency response, distortion, IMD or even impulse decay response as all the reviewers focus on.
Another good example (and now you will all hate me) is in the medical area where people are convinced the treatment works
eg
Acupuncture, YES IT DOES WORK... up to 60% success rate but a recent well conducted sham trial showed that the results were the same weather the needles were put in the acupuncture points or just randomly placed anywhere.......conclusion its the white coat placebo effect.
Glucosamine for joint pain. Trials show no effect but yet people swear by the stuff, its a best seller! Note it looks like it slightly reduces height loss by around 8mm with age.
Panadol. Its the worlds number 1 selling pain killer, we all swear that it works. Guess what, the latest trials show that its just marginally better than the placebo. OK it can help you sleep and reduce your fever.
Fish Oil. Nup does not reduce cardiac arrhythmias as people have claimed. Nup, trials have shown it in fact makes arrhythmias worse!!
I really do not want to recommend to you guys any thing that I have not trialed but yes it you like it, go with it as it certainly will not do any harm. What does upset me are many of the "professional" reviewers who wax lyrical about the obvious massive differences between say DVD players where in fact blind A/ B trials show it was impossible. They make a career in selling ******** as do many of the "audiophile " shops.
Hey Par4ken
Re the circuitry of the evaluation module. Yes you are quite correct it does differ from the SM 3 as it was an earlier revision. Here it is:
The SM 2 is more like the evaluation module. The main advantage in the revised circuitry is a slightly higher - 12 V power supply rail.
Its it better than the SM2 - YES
What has Chucky got at home -
the SM2 I don't lose any sleep over it
but if you need optical in then get it
Speaking of snake oil and Hifi ********, there is a lot of it in amplifiers as largely that is not what stuffs up the sound but having said that our new 120 W per channel 6 channel amp master really does offer a great difference - the soft clipping really makes it like a massive valve amplifier. I would not have developed the product if it was just another "me to".
I can assure all you guys and any customer that we always offer real advice that often can be against our sales.