MrMateoHead
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O2 AMP + ODAC
- Thread starter NimbleTurtle
- Start date
raoultrifan
Headphoneus Supremus
Hi guys, will just copy-paste my thoughts from http://www.head-fi.org/t/784790/burson-supreme-sound-audio-v5-opa-d-v5-opa-s-review/120#post_12800983, in case you're interested in getting all the "juice" from our beloved Objective2 headamp.
Hope you remember my post regarding O2 and SS V5-dual from here: http://www.head-fi.org/t/784790/burson-supreme-sound-audio-v5-opa-d-v5-opa-s-review/90#post_12384936. I did some "wiring" this evening and I was able o fit the Burson beast inside the O2, but I needed to remove the batteries (didn't needed anyway).
Gosh, sound is amazing and I can't believe that I am actually recommending an op-amp that costs about 50% the price of the O2. Anyway, the Objective2 headamp sounds three times the money it costs, perhaps this is why so many people is still purchasing it and with a Burson V5-dual placed in Voltage Amplification stage I get an increased soundstage and more details on top of a neutral sound.
P.S.: Hope you'll be able to find a 90 degree adapter, because doing this wiring inside O2's case might get you into troubles if you're not paying attention!
Hope you remember my post regarding O2 and SS V5-dual from here: http://www.head-fi.org/t/784790/burson-supreme-sound-audio-v5-opa-d-v5-opa-s-review/90#post_12384936. I did some "wiring" this evening and I was able o fit the Burson beast inside the O2, but I needed to remove the batteries (didn't needed anyway).
Gosh, sound is amazing and I can't believe that I am actually recommending an op-amp that costs about 50% the price of the O2. Anyway, the Objective2 headamp sounds three times the money it costs, perhaps this is why so many people is still purchasing it and with a Burson V5-dual placed in Voltage Amplification stage I get an increased soundstage and more details on top of a neutral sound.
P.S.: Hope you'll be able to find a 90 degree adapter, because doing this wiring inside O2's case might get you into troubles if you're not paying attention!
WilliamLeonhart
Headphoneus Supremus
Hi guys, will just copy-paste my thoughts from http://www.head-fi.org/t/784790/burson-supreme-sound-audio-v5-opa-d-v5-opa-s-review/120#post_12800983, in case you're interested in getting all the "juice" from our beloved Objective2 headamp.
Hope you remember my post regarding O2 and SS V5-dual from here: http://www.head-fi.org/t/784790/burson-supreme-sound-audio-v5-opa-d-v5-opa-s-review/90#post_12384936. I did some "wiring" this evening and I was able o fit the Burson beast inside the O2, but I needed to remove the batteries (didn't needed anyway).
Gosh, sound is amazing and I can't believe that I am actually recommending an op-amp that costs about 50% the price of the O2. Anyway, the Objective2 headamp sounds three times the money it costs, perhaps this is why so many people is still purchasing it and with a Burson V5-dual placed in Voltage Amplification stage I get an increased soundstage and more details on top of a neutral sound.
P.S.: Hope you'll be able to find a 90 degree adapter, because doing this wiring inside O2's case might get you into troubles if you're not paying attention!
Hey Raoul,
High-five from Singapore!
raoultrifan
Headphoneus Supremus
I've seen your mod recently and I love it! You should probably buy a taller case to accomodate the new op-amps.
BTW, don't try Hifiman planars unless you can measure output opamps temps in "real time". I've seen a couple of people here on Head-Fi with "exploded" NJM4556 when high power was used to drive planars.
Also, can you please measure DC output voltage?
Regards,
Raul.
BTW, don't try Hifiman planars unless you can measure output opamps temps in "real time". I've seen a couple of people here on Head-Fi with "exploded" NJM4556 when high power was used to drive planars.
Also, can you please measure DC output voltage?
Regards,
Raul.
dukefx
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50% more than the O2 you mean. It's about 180$ unless I was looking in the wrong place.
raoultrifan
Headphoneus Supremus
You could check BURSON's website, I see it's about 70 USD each V5 dual. If you look further to eBay you can find a pair of V5 duals at the price of about 83 USD + shipping from DE (most likely samples from BURSON).
P.S.: My "modded" O2 should cost over 150 USD, because it has back power plug, 6.3mm + 3.5mm output headphone plugs, RCA gold plated plugs for input etc. So, it deserves a V5 dual I'd say.
P.S.: My "modded" O2 should cost over 150 USD, because it has back power plug, 6.3mm + 3.5mm output headphone plugs, RCA gold plated plugs for input etc. So, it deserves a V5 dual I'd say.
dukefx
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I have the swiss desktop version with power and RCA inputs/outputs at the back and no battery slots, but I'm not a big fan of wires.
As for the price: you are right, it's 85$ directly from Burson incl. shipping.
As for the price: you are right, it's 85$ directly from Burson incl. shipping.
raoultrifan
Headphoneus Supremus
I'm not a fan of wires myself, buy this is why I was using my scope, to test if there are some oscillations or any other suspicious signals (I couldn't find anything suspicious, so I closed O2's case with the BURSON SS V5 dual inside).
Anywyay, now I'm waiting for the V5i to get'em shiped so I can test one in O2's VAS. I've seen headfiers saying that the sound is about the same as SS V5. Also, V5i is cheaper than the original V5, so for low-heigt cases this should be a very good choice for audiophiles/modders .
Anywyay, now I'm waiting for the V5i to get'em shiped so I can test one in O2's VAS. I've seen headfiers saying that the sound is about the same as SS V5. Also, V5i is cheaper than the original V5, so for low-heigt cases this should be a very good choice for audiophiles/modders .
dukefx
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According to reviewers the V5i has an inferior sound stage compared to the V5, but I'm still quite curious.
raoultrifan
Headphoneus Supremus
http://www.head-fi.org/products/burson-audio-supreme-sound-opamp-v5i - some say it's about the same sound as V5, some say soundstage is better for the V5, but I really believe it depends on what DAC/amp you're using to do the test. I'm looking further to receive my V5i and give'em a spin, though I'm pretty sure it will be very difficult for me to get the differences between V5 and V5i in my setup.
Sunrider6
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Hi there,
I have just finished building my O2 amp, as well as putting my Odac in there, using the "method 2", that consist of cutting 2 traces of the input jack, to be able to still use the input jack of the O2.
I bought the full kit, as well as the Odac, from www.headnhifi.com. (really good service, I highly recommend buying from them !).
(It was my first DIY project ^_^)
It work really great, but I have a "small" issue with it.
I have a "hum" noise when I put my fingers on the aluminum closure.
Hopefully, when I don't lay my fingers on it, it's stay silent. Same if I only use the volume knob, silent.
Is there something I can do about this issue ?
I have just finished building my O2 amp, as well as putting my Odac in there, using the "method 2", that consist of cutting 2 traces of the input jack, to be able to still use the input jack of the O2.
I bought the full kit, as well as the Odac, from www.headnhifi.com. (really good service, I highly recommend buying from them !).
(It was my first DIY project ^_^)
It work really great, but I have a "small" issue with it.
I have a "hum" noise when I put my fingers on the aluminum closure.
Hopefully, when I don't lay my fingers on it, it's stay silent. Same if I only use the volume knob, silent.
Is there something I can do about this issue ?
raoultrifan
Headphoneus Supremus
Hello,
I also bought my ODAC and my O2 kit from Walter and I was happy with my purchase. I recommend you to triple-check if you cut the correct wires and if the aluminum case is correclty connected to GND plane. Also, you may try grounding the pot knob as well; just use a decent ohm-meter to check if correclty grounded.
Regards,
Raul.
I also bought my ODAC and my O2 kit from Walter and I was happy with my purchase. I recommend you to triple-check if you cut the correct wires and if the aluminum case is correclty connected to GND plane. Also, you may try grounding the pot knob as well; just use a decent ohm-meter to check if correclty grounded.
Regards,
Raul.
Sunrider6
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I didn't connected the aluminum case to the GND plane at all, so maybe it's the issue ^_^
I will try it in a couple of hours or tomorrow.
Thank you for trying to help, it's appreciated
I will try it in a couple of hours or tomorrow.
Thank you for trying to help, it's appreciated
raoultrifan
Headphoneus Supremus
Taken from https://www.jdslabs.com/products/34/machined-objective2-front-panel/ :
"Attach ground wire to input jack of Objective2 PCB.
Attach front panel to enclosure. Securely wrap ground wire between front panel and case."
More details from the original O2's blog: "If you hear hum with the O2 running on AC power make sure the case is grounded as documented in the next section".
Good luck,
Raul.
"Attach ground wire to input jack of Objective2 PCB.
Attach front panel to enclosure. Securely wrap ground wire between front panel and case."
More details from the original O2's blog: "If you hear hum with the O2 running on AC power make sure the case is grounded as documented in the next section".
Good luck,
Raul.
escalibur
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Is anyone of you having such an issue with ODAC O2 RevB and Sennheiser HD650s where ''high gain' setting is causing some strange noise even at 9 o'clock setting?
For example in this song:
Another sample (during chorus' drum bass hits)
https://open.spotify.com/track/0LbaxqqbUVE1kANizaaL0F (Official music video has some thunder effects so I didn't link a YouTube video for this one)
I've tested with Spotify and some other songs too. Same issue. Low gain setting is not causing this but I'm still not sure is this more of a 'feature' than an actual problem?
ps. I didn't had this issue with my previous combo Audinst HUD-mx1.
For example in this song:
Another sample (during chorus' drum bass hits)
https://open.spotify.com/track/0LbaxqqbUVE1kANizaaL0F (Official music video has some thunder effects so I didn't link a YouTube video for this one)
I've tested with Spotify and some other songs too. Same issue. Low gain setting is not causing this but I'm still not sure is this more of a 'feature' than an actual problem?
ps. I didn't had this issue with my previous combo Audinst HUD-mx1.
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