- Thread Starter
- #161
We live south of Seattle in Washington state. So it would be a 4 hour trip down from the Canadian border. I am interested in some of that but you really think you would want to bring all that gear with you on the airplane?
Hello Amir,
I'm moving to Vancouver for 12 months...
The smaller items will come, and yes I probably won't need to bring 6 channels of amplification in the move...
just let me know...
Are they O2 clones or separate design?I'd still love to see the Mayflower Arc reviews. To my ears they are greatly underrated but I'd love to see if my subjective experience is backed up by the facts!
Are they O2 clones or separate design?
The absence of op-amps is not evidence of good engineering.Separate and original design, just the same case. One of the more interesting things about it is its complete lack of op-amps. To my ears is is VERY neutral sounding.
The absence of op-amps is not evidence of good engineering.
I don't think I have documented that. Briefly, the output voltage is measured with a load of 100 k ohm of my analyzer (essentially "no load"). I then load up the output with 33 ohm and measure that voltage. The output impedance is then = 33 * open voltage/(closed voltage -1). Basically you are solving a resistor divider formula.Amir, can you share your technique for measuring output impedance of DACs (for instance, the totalDAC is measured at 37 ohms)? Perhaps you have a post that describes all your test set-ups in more detail? Tks.
Those graphs are not mine. But yes, there are multiple ways based on psychoacoustics that we can calculate the distortion-free channel we need for full transparency. One is based on ear's dynamic range (about 115 dB). Another is based on threshold of hearing relative to the loudest playback SPL. The latter results in 120+ dB SPL.Amir, additional questions for you. On the page "Audibility Thresholds" you use -120dB as a "strict" THD threshold. Why? Are you using psychoacoustic data to back this up?
we can calculate the distortion-free channel we need for full transparency...
Can't Floyd Toole hear distortion at-300dB?