Thanks very much for the measurements! It is great to see the test data of Headroom DUDA which was one of the top performers from Headroom product line.
Just few thoughts for reference.
1. BUDA has been released for long time. I would guess that the unit being tested here is more than 12 years old. This should be easy to confirm by whoever ran this test.
2. Because the tested BUDA here is old, this is normal/expected situation, those electrolytic capacitors inside are not at their peak performance, they might need to be replaced/re-caped now if we really want to get its peak performance.
3. The Headroom Max amplifier module inside of BUDA was tested by Stereophile.com magazine as a part of Headroom MAX, Desktop amplifier reviews and its measurements were great. This Max module is the key ingredient/reason why Headroom MAX amplifiers were listed as Class A product on Stereophile.com list back then. If we see the test results here are different from what Stereophile's posted measurement data, it will be a technical discussion to see what might cause this discrepancy and how to fix it (e.g. re-cap).
4. The biggest concern of the test data here seems to be the use of Astrodyne switching PSU, not expected Headroom's DPS (Desktop Power Supply, with big toroidal transformer inside). Note: schalliol pointed this out as well.
5. Headroom Desktop line Amplifier with their Max modules inside, plus DPS, from circuit topology and design standpoint, it is almost exactly same as their MAX amplifier. (Note: Headroom MAX amplifier has better caps, such as Rubycorn blackgate capacitors).
Just few thoughts for reference.
1. BUDA has been released for long time. I would guess that the unit being tested here is more than 12 years old. This should be easy to confirm by whoever ran this test.
2. Because the tested BUDA here is old, this is normal/expected situation, those electrolytic capacitors inside are not at their peak performance, they might need to be replaced/re-caped now if we really want to get its peak performance.
3. The Headroom Max amplifier module inside of BUDA was tested by Stereophile.com magazine as a part of Headroom MAX, Desktop amplifier reviews and its measurements were great. This Max module is the key ingredient/reason why Headroom MAX amplifiers were listed as Class A product on Stereophile.com list back then. If we see the test results here are different from what Stereophile's posted measurement data, it will be a technical discussion to see what might cause this discrepancy and how to fix it (e.g. re-cap).
4. The biggest concern of the test data here seems to be the use of Astrodyne switching PSU, not expected Headroom's DPS (Desktop Power Supply, with big toroidal transformer inside). Note: schalliol pointed this out as well.
5. Headroom Desktop line Amplifier with their Max modules inside, plus DPS, from circuit topology and design standpoint, it is almost exactly same as their MAX amplifier. (Note: Headroom MAX amplifier has better caps, such as Rubycorn blackgate capacitors).
