February 27, 200818 yr Untill now I read only severe negative posts for SRM-727II. But I still can't find anywhere concrete opinion what's the problem with this Stax amp. I see most people own SRM-007tII, SRM-006t and even SRM-717 but not the 727 How many of you had the opportunity to compare 727II with another amps?
February 27, 200818 yr If anyone needs help to burn in their SRM-727II, I think I can help FOTM FOTM FOTM FOTM FOTM FOTM FOTM...
February 27, 200818 yr The 727 is supposed to be a similar design to the 717 with the output stage dissipating about 3 times the power, therefore a more extended high frequency and low frequency response. If it really sounds much worse, there certainly could be a number of reasons, but i would be surprised if on a casual basis anyone could tell the difference between the two. Unless stax made some kind of horrible mistake.
February 27, 200818 yr I didn't compare them directly but I did compare them against a known reference and I preferred the 717. I found the 727 to be too warm and slow for my liking.
February 28, 200818 yr Author How many of you had the opportunity to compare 727II with another amps? No one. I don't mean a brief listening of 727II but a more detailed comparison. I've noticed that one term listening can't give me the complete picture of one component. It depends on many conditions - technical, psychological, etc. Often the first impression is quite different from my final conclusion...
February 29, 200818 yr Hm, I'm eyeing that Omega II with 717 interest check on headfi. Has the right voltage, too, 230V. Do you think something like $2200 is a realistic offer?
February 29, 200818 yr Hm, I'm eyeing that Omega II with 717 interest check on headfi. Has the right voltage, too, 230V. Do you think something like $2200 is a realistic offer? I think thats a very realistic offer, though I've seen the for sale prices on used OII/amp combos vary wildly, from $2000 to $3000.
February 29, 200818 yr Cool, thanks guys. Excellent condition as far as I know with flight case and everything.
February 29, 200818 yr 800-1000$ is the norm but you can find higher and lower as usual. damn, i shoulda snapped up the 717 that an aussie was selling for AUD$700. too bad i was broke =(
March 1, 200818 yr Pah, you think that's bad. I bookmarked this to keep an eye on it with a view to buying if it didn't go too high, then this happened with over a day to go.... http://cgi.ebay.com/STAX-SRM-1-Mk-2-Headphone-Amplifier_W0QQitemZ200203586023QQcmdZViewItem?hash=item200203586023
March 1, 200818 yr Just bought the SR-007/717 package for $2300 shipped. Saw some pictures, perfect condition, really nice. Gotta love the weak dollar.
March 1, 200818 yr Congrats on the new gears! Gotta love the weak dollar. Hey, someone's gotta take advantage of it.
April 14, 200818 yr Author Something strange about the 727II : Today I measured bias voltage 318V In the specifications of 727II the bias voltage is shown as 580V so can anyone explain me why is it less?
April 14, 200818 yr You can't measure the bias at the front panel connector without a real VTVM. Digital meters are way to low in impedance...
April 14, 200818 yr Author Dear Kevin, we used a Yokogawa 7532 03 DMM, which measured ~380Vdc before the ballast resisitor (4.7Meg), falling to 312Vdc on the pin. OK, maybe the DMM drew some current when measuring bias voltage on the pin, but the voltage before the resistor comes from a low-impedance source, so the problem remains.
April 25, 200818 yr Something is definitely wrong with the bias circuit if you measure only 380 volts before the ballast resistor. Likely one of the 2 diodes.
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