So the O2 is a good amp for HE-400i?
Will the O2 work well with IEMs? Especially BA hybrids.
Will the O2 work well with IEMs? Especially BA hybrids.
The O2 is not an amp that I liked for the HD400i or HE400, I really didn't like it for any of the other headphones I had at the time due to slightly thin (some would say neutral) qualities of the O2 IMO, YMMV.So the O2 is a good amp for HE-400i?
Will the O2 work well with IEMs? Especially BA hybrids.
Thanks for the link, gotta build one resistor network adapter like that. I'm familiar with reducing hiss with resistor load, but that resistor network is new to me. I just need some higher wattage resistors, as all I have right now are just 1/4W resistors. I yesterday lubricated all pots and switches on signal path of my AKAI, allthough I had to do it a bit violently with switches as I had to crack their casing open as they are so closed design that I couldn't get any lube inside them without opening them.Hum/hiss is almost always directly related to either ground loops or more likely high gain of the power amplifier. The easiest solution to reduce hiss is to make a resister network like the hifiman box before your headphone cable, reducing the load and power output.
I used this when I made mine:
https://robrobinette.com/HeadphoneResistorNetworkCalculator.htm
I'm familiar with reducing hiss with resistor load, but that resistor network is new to me. I just need some higher wattage resistors, as all I have right now are just 1/4W resistors.
Now we can also calculate the watts dissipated by R3 using the formula Watts = Amps^2 * Ohms = 0.0468amps^2 * 2ohms = .00438 watts. The watts dissipated by the headphones is: 0.00246amps^2 * 38ohms = 0.00023 watts (0.23 milliwatts).
hmm, I was wondering the exact same thing, 1/4W resistors should be pretty adequate then.hmm, I wonder why there is a recommendation to use 2W and 5W resistors while counted that dissipation is only a few mW..
So the O2 is a good amp for HE-400i?
Will the O2 work well with IEMs? Especially BA hybrids.
The O2 is not an amp that I liked for the HD400i or HE400, I really didn't like it for any of the other headphones I had at the time due to slightly thin (some would say neutral) qualities of the O2 IMO, YMMV.
Sorry but I don't use IEM's
So the O2 is a good amp for HE-400i?
Will the O2 work well with IEMs? Especially BA hybrids.
I don't even have a dac actually, plan to just plug it in my laptop.Short answer, Yes.
For IEMs, many of which needing little power, I would say it is but I would get "unity" gain (gain of 0X). For most listening, 2.5X gain is good IF you have a 2V source. for a 1V source, like a phone / Mp3 player, I would want a little more gain.
I don't even have a dac actually, plan to just plug it in my laptop.
When I had the O2/ODAC I also had a Bifrost Uber, Modi, Magni, Teac UD-301, Asgard2 and Project Ember. Ember and headphone output of UD-301 were fuller sounding and were not sibilant to me but the O2 and Magni both had some sibilance while the Asgard2 has the full sound like the UD-301 and Ember it has some slight sibilance at times. I've since modded the HE400 so its no where close to the stock sound and it me its better than my HE560 in some ways for some genres of music.What amp did you think sounded good with those thin-sounding headphones?
IMO the HE-400 sounded pretty bad until about 2 weeks in, when my ears adjusted. The amp had nothing to do with it except that I could go louder.
I'm still loving my modded HE400 but I don't think there are many still in use these days.Shame this thread is dead. The HE400 with silver cable and Jergpad is end game material to me. I have not found a pair of cans that perform much better than the HE400 honestly and I've auditioned majority of TOTL HPs.