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- Users: zeffa
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HIFIMAN HE-400 Planar Headphones Pre-order
Quote: Quote: I had a friend do an informal comparison to his Q701s & my K501s. He thought the HE400s were superior over the AKGs in all aspects except for the soundstage. This was done using an O2 amp. Regarding amping, I think the O2 amp does a pretty...- zeffa
- Post #813
- Forum: Sponsor Announcements and Deals
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HIFIMAN HE-400 Planar Headphones Pre-order
To figure out what is causing your channel imbalance / cut channel - test the wire first. Unscrew the SMA headphone connectors, and swap them. If the good side is now bad, then its a wire issue. If the bad side is still bad, then it might be a loose connection inside. To test this, try pinching...- zeffa
- Post #630
- Forum: Sponsor Announcements and Deals
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HIFIMAN HE-400 Planar Headphones Pre-order
Mine worked perfectly for the first day or so. Then the left channel cut out (or rather the volume out was only about 10% of the right output). I fixed it by taking the whole thing apart and tightening the screws. There are actually two layers of screws. The outer black screws fix a plastic ring...- zeffa
- Post #628
- Forum: Sponsor Announcements and Deals
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Review: NwAvGuy's O2 DIY Amplifier
Quote: I built my own O2, with gain set at 1x and 2.5x. With standard DAC inputs (grubDAC and NFB-3), the sound using 2.5x gain is noticeably harsher than with 1x. It also gets exceedingly loud very quickly, so I just use 1x gain all the time (and I've never had to turn it up to...- zeffa
- Post #490
- Forum: Sound Science
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Reply to review by 'zeffa' on item 'Epiphany Acoustics EHP-O2'
17.8V AC with no load (well under the recommended 22.5V max). My understanding is that an AC wallwart is basically just a transformer in a plastic shell - I don't think there's any other circuitry involved. The O2's power circuit filters and regulates the AC into +/- 12V DC.- zeffa
- Head Gear rating reply
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Reply to review by 'zeffa' on item 'Epiphany Acoustics EHP-O2'
The specs call for AC input between 14-20V, but a few people reported that the 12V AC wallwarts were pumping out around 14V AC and had no problems with those? I know my 15V AC actually pumps out around 17.8V AC?- zeffa
- Head Gear rating reply
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Reply to review by 'zeffa' on item 'Epiphany Acoustics EHP-O2'
Great review! FYI, the 12V AC powerpacks from Jaycar and Altronics have been tested to work with the O2. They're both <$20. Personally, I used a 15V AC powerpack from Altronics, but had to solder my own connector.- zeffa
- Head Gear rating reply
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New Hifiman Headphone HE-400 is out
Yeah, I keep refreshing hoping to find some more impressions... Anyway, I found a few tidbits & photos over at techpowerup's CES live coverage page: Not sure why the first quote is cut off, but hopefully their resident headphone guy will provide some more detailed...- zeffa
- Post #316
- Forum: Headphones (full-size)
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The GrubDAC
Hi Tom, thanks for the advice! On closer inspection of the Wolfson chip, I noticed that there wasn't any solder at the LINEVOUTR pin you mentioned. Now that its been on soldered properly, everything seems to be working! Thanks again! :)- zeffa
- Post #804
- Forum: DIY (Do-It-Yourself) Discussions
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The GrubDAC
Built the grubDAC last night. I was pretty happy with the results for my first time doing SMD soldering. Anyway, initial power on seemed to work properly - all the voltages were correct, and the LED turned on. When wired up though, I'm getting sound, but only out of the left side. I tried on Mac...- zeffa
- Post #802
- Forum: DIY (Do-It-Yourself) Discussions
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HD600 + Bottlehead Crack = Too warm?
Quote: Then you probably won't be getting a telefunken, unless you're lucky (or you can source one off a friend for cheaper). Mine cost about $50 plus shipping from ebay, and that's reasonably cheap... The 12BH7's are probably the way to go then. You can probably get 2 for $30...- zeffa
- Post #6
- Forum: Headphone Amps (full-size)
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HD600 + Bottlehead Crack = Too warm?
I have a Bottlehead Crack with Speedball and some other mods, and I use it with a HD600 (also AKG K501). I don't find it excessively warm at all. Re your first question about a suitable amp for the HD600, it really depends on the sound you're looking for. Personally, I find the HD600 have a...- zeffa
- Post #4
- Forum: Headphone Amps (full-size)
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Audio-GD NFB-2 & NFB-3 Delivery & Impression Thread
There should be a short (~1m) coax spdif cable included with your NFB3, as well as optical & USB cables. Before spending money on cables, I'd try and compare the sound you get from coax/optical/USB inputs, choose your preferred input and then buy a cable if you still feel the need for it. ...- zeffa
- Post #997
- Forum: Dedicated Source Components
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Headphone Amp For AKG K501
To OP: Congrats on getting your first pair of awesome headphones. They are definitely a great buy! I also recently bought a pair of K501's off ebay. I drive them off my Bottlehead Crack, and there's a fantastic synergy between them. I find that there's a larger soundstage and a naturalness that...- zeffa
- Post #11
- Forum: Headphone Amps (full-size)
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Audio-GD NFB-2 & NFB-3 Delivery & Impression Thread
Quote: Given that the last few NFB2/3's that have been shown/unboxed in this thread have had the new gold ACSS sockets, I'm guessing its now standard. I think what Kingwa means, is that if you have an older Audio-GD model with the old sockets, you can have old sockets put on your new order...- zeffa
- Post #828
- Forum: Dedicated Source Components
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MarkL Mod made EASY! D2000 (possibly for D5000) template!
Jonclarke: Have you looked into this: http://www.head-fi.org/forum/thread/450631/a-trick-to-get-less-treble-and-sibilance-on-markl-modded-denons- zeffa
- Post #36
- Forum: Headphones (full-size)
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My Apologies. Please read.
Quote: Thanks Mike, I suspect you are right about the shipping problem. I've sent you an email.- zeffa
- Post #41
- Forum: Sponsor Announcements and Deals
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My Apologies. Please read.
Quote: Lucky you! I've been waiting over three months now for a TWag v2 IEM cable (ordered 20/12/2010). Every 2 weeks I send off an email to Craig, and for the most part he responds promptly and is very apologetic. But still nothing arrives in the mail... :( Anyway, still haven't lost...- zeffa
- Post #38
- Forum: Sponsor Announcements and Deals
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MarkL Mod made EASY! D2000 (possibly for D5000) template!
Just did a partial mod as per the thread listed by Jonclarke above and previous comments by markl in this thread. My mod involved applying dynamat xtreme to the innermost ring of the rear of the driver, and to the back of the earcup (but not over the gray disk). I'm already using the JMoney ear...- zeffa
- Post #33
- Forum: Headphones (full-size)
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Head-Fi Giveaway: Nationite S:Flo2 8GB - NaNite N2 8GB - 2x Brainwavz M3, 2x M2 - Win Some Loot for Just Saying Hi!
Nice giveaway in the spirit of the holiday season! Merry Christmas & happy holidays all!- zeffa
- Post #700
- Forum: Sponsor Announcements and Deals
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Looking for upgrades for Ety's ER-6i
Just offering my 2c worth of (limited) experience... The ER6i's were my first IEM, and boy did they sound amazing when I had them. Earlier this year, I heard about the Audeo PFEs and decided to get a pair. Since then I have not listened to the ER6i's for more than a few minutes... everything...- zeffa
- Post #19
- Forum: Portable Headphones, Earphones and In-Ear Monitors
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JH Audio JH-13 PRO impressions thread
@ slattikarma I'm in the same boat as you. Received about 8 working days ago, heard nothing since then. And today, a pleasant surprise in my email Very much looking forward to these!!- zeffa
- Post #6,048
- Forum: Portable Headphones, Earphones and In-Ear Monitors
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So how much did you paid for your Phonak Audeo PFE and WHERE from?
Quote: Originally Posted by nsx_23 Anyone know of an Australian seller? Or just someone that ships to Australia? I got in contact with the managing director of Phonak Australia through davidw89 on this thread (see page 3). Basically, you'll need to contact David Mutthumani from...- zeffa
- Post #82
- Forum: Portable Headphones, Earphones and In-Ear Monitors