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Old 27th November 2011, 12:25 AM   #861
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For grounding the enclosure, which point do I actually solder a small piece of wire to? I see 3 vias for P1 but it doesn't look like the wire is actually soldered to any of them in that picture in the o2 details section of your blog.
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Old 27th November 2011, 04:26 AM   #862
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Rocketscientist,

I've been listening this O2 for a week how and I love it !

Now I want to upgrade the component like the C3 and C14 to blackgate c series, does this improve the SQ ? Any sugesstion?

Or should I ask you this, which parts is the most critical to upgrade to?

I think this can improve more with more expensive parts ?

Cal
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Old 27th November 2011, 04:48 AM   #863
qusp is offline qusp  Australia
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hahaha, my guess is you dont quite understand the whole vibe in this thread

the answer will be

no
none
no
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Old 27th November 2011, 05:03 AM   #864
nezbleu is offline nezbleu  Canada
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Quote:
Originally Posted by dewasiuk View Post
For grounding the enclosure, which point do I actually solder a small piece of wire to? I see 3 vias for P1 but it doesn't look like the wire is actually soldered to any of them in that picture in the o2 details section of your blog.
Pin 1, the front center pin. See http://anacapa.kycon.com/Pub_Eng_Dra...20-5B-577C.pdf
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Old 27th November 2011, 05:30 AM   #865
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@calico88 the O2 already is completely transparent. It contributes no sound of it own to the music. How can you improve on that with "upgrades"? Changing parts in the O2 is more likely to make it perform worse (especially changing the op amps).

@desasiuk, it's pin one of the input jack as nezbleu suggested. You could also use the ground pin of P1 if you wanted.
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Old 27th November 2011, 07:12 AM   #866
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I'm afraid you gonna say that.

My woody O2 wip.
Click the image to open in full size.
Click the image to open in full size.
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Old 27th November 2011, 08:13 AM   #867
Zsubbo is offline Zsubbo  Hungary
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Quote:
Originally Posted by RocketScientist View Post
The K1000 is really designed to be driven by a speaker output, not a headphone output. I don't recommend the O2 for the K1000. Even on AC power, 7 Vrms just isn't enough unless you like to listen to compressed pop music at modest levels. Wide dynamic range music requires peaks of at least 105 dB SPL with 110 dB SPL being a better number. The average SPL will still be below 90 or even 85 dB when peaks are hitting 105 dB with wide dynamic range music. If you haven't seen it, you might want to check out my article on headphone and amp compatibility:

More Power?
I've seen it, and figured out I could still drive them loud enough, but I didn't count with the peaks..., in that case I'll use it only with my Grados and Sennheisers.

Do you think that Sofaspud's way to measure the output voltage of my dac will be good enough ? (I know it won't be precise, but if I'm within 0.2 volts to the real output voltage, it is good enough for me.)

Thank, BTW will be there any article about the balanced operation ?
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Old 27th November 2011, 08:35 AM   #868
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Hi Zsubbo. I'm around, but don't mean to speak for RS. If my idea is workable, I think the limiting factor is the meter. My cheapo multimeter here only has a lower AC range of 200 volts. I'd never get millivolt resolution with something like that. My Fluke 79 on the other hand has 40, 4, and 0.4 volt lower AC ranges. Much depends on the meter you'll be using.
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Old 27th November 2011, 08:49 AM   #869
qusp is offline qusp  Australia
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Quote:
Originally Posted by Zsubbo View Post

Thank, BTW will be there any article about the balanced operation ?
i think a more accurate description would be bridged operation
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Old 27th November 2011, 08:52 AM   #870
Zsubbo is offline Zsubbo  Hungary
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Hi, I'll be using a Tektronix TX3 multimeter, it should be good enough, I was just curious how good your method is.
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