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raoultrifan
Headphoneus Supremus
Hi guys,
Here http://www.head-fi.org/t/770610/introducing-the-matrix-m-stage-hpa-3u-and-hpa-3b-review-to-follow/90#post_12390513 I wasn't able to close the upper case of my MATRIX HPA-3B headamp, because BURSON SS V5 dual op-amps are 2mm higher then it should be to properly fit inside the case. So, I did some "custom cables" to connect them and bend the wires to 90 degrees, so I can close the case properly.
For those interested in purchasing BURSON SS V5 op-amps for MATRIX HPA-3B I strongly recommend them to purchase the special adapters with small cables and DIP8 sockets to properly bend the V5, like in the above pictures. I do not recommend you to DIY those adapting cables like I did, because there's a high chance of getting some short-circuit or the induce oscillations.
The sound is the same like we all know: detailed, non fatiguing, open soundstage and very transparent.
Temps with case open were: 59.5C on the bottom op-amp and 61.9C on the top op-amp. Will see if I can measure the temps with case closed in the next days (I have a small temperature probe for this, just need the time to do it).
Regards,
Raul.
P.S.: When working late and tired I might break up some things: I had inserted the top V5 into the DIP8 socket vice-versa (don't ask me how I could do this rookie mistake, please). Looks like there's some sort of protection inside the V5, because it didn't blew away like I would expect from an op-amp that is powered to the wrong pins and this is a very good thing I'd say! Also, some protection is probably installed in the MATRIX HPA-3B, because nothing wrong happened with the headamp. I only powered the HPA-3B for 1-2 seconds, then I realised the issue (one resistor or one diode got smoked a bit, but I measured both and they're within parameters). After this issue I've tested my HPA-3B with my 600 ohms DT880 at extreme volume for over 2 hours and I'm happy my headamp is still within parameters.
L.E.: Do not try to install BURSON SS V5 or V5i in MATRIX M-Stage HPA 3B if you haven't lowered the voltage from +/-18V to +/-15V by replacing the 2 power regulators! The mod is quite simple and is perfectly covered here: http://www.head-fi.org/t/770610/introducing-the-matrix-m-stage-hpa-3u-and-hpa-3b-review-to-follow/90#post_12390513.
Here http://www.head-fi.org/t/770610/introducing-the-matrix-m-stage-hpa-3u-and-hpa-3b-review-to-follow/90#post_12390513 I wasn't able to close the upper case of my MATRIX HPA-3B headamp, because BURSON SS V5 dual op-amps are 2mm higher then it should be to properly fit inside the case. So, I did some "custom cables" to connect them and bend the wires to 90 degrees, so I can close the case properly.
For those interested in purchasing BURSON SS V5 op-amps for MATRIX HPA-3B I strongly recommend them to purchase the special adapters with small cables and DIP8 sockets to properly bend the V5, like in the above pictures. I do not recommend you to DIY those adapting cables like I did, because there's a high chance of getting some short-circuit or the induce oscillations.
The sound is the same like we all know: detailed, non fatiguing, open soundstage and very transparent.
Temps with case open were: 59.5C on the bottom op-amp and 61.9C on the top op-amp. Will see if I can measure the temps with case closed in the next days (I have a small temperature probe for this, just need the time to do it).
Regards,
Raul.
P.S.: When working late and tired I might break up some things: I had inserted the top V5 into the DIP8 socket vice-versa (don't ask me how I could do this rookie mistake, please). Looks like there's some sort of protection inside the V5, because it didn't blew away like I would expect from an op-amp that is powered to the wrong pins and this is a very good thing I'd say! Also, some protection is probably installed in the MATRIX HPA-3B, because nothing wrong happened with the headamp. I only powered the HPA-3B for 1-2 seconds, then I realised the issue (one resistor or one diode got smoked a bit, but I measured both and they're within parameters). After this issue I've tested my HPA-3B with my 600 ohms DT880 at extreme volume for over 2 hours and I'm happy my headamp is still within parameters.
L.E.: Do not try to install BURSON SS V5 or V5i in MATRIX M-Stage HPA 3B if you haven't lowered the voltage from +/-18V to +/-15V by replacing the 2 power regulators! The mod is quite simple and is perfectly covered here: http://www.head-fi.org/t/770610/introducing-the-matrix-m-stage-hpa-3u-and-hpa-3b-review-to-follow/90#post_12390513.
