Headphone Amplification

AFAIR, there is a diode after each 9v battery, and two sets of caps between V+ and ground and V- and ground each. There is a series resistor inside each 9V rechargeable lithium battery, as I recall, but I can't figure out why they won't work with the SR-71. Any ideas why?

i found some internal pic of this portable amp, and posted in the headfi thread. http://www.head-fi.org/forums/f105/rudistor-xj-03-a-347133/ some1 pm me asking me to remove it. was there something wrong i did posting internal pic to be share with other? anyway,what do guys think of this amp? some1 in headfi reckon it's better then the pico, it look like a ra-1 to me?

I am looking for a compact amp with a line out for my desk at work, so I can keep my crappy powered speakers plugged in too. Source is an iPhone 3g dock, headphones are most likely k271's, if not them, either DT770's or DT250's (I need to hear the k271 first). So, assuming I go with the k271, I am guessing I'll want to err on the warm side of neutral, and I'd really prefer something with a small case and wall wart as "desk" and "office" are really words too strong to use for what they give us. My understanding of the mini3 is that it isn't easily modified for a lineout (but I would be happy to be wrong - I love the mini3). Battery functionality isn't important, but …

I thought it was about time my cheap ass got a cheap headphone amp (I wouldn't be so cheap if I wasn't so broke ) and due to the overabundance of orthodynamics in my collection I need something with a good bit of powah, so far the only ones I've found that are both cheap and powerful seem to be the Darkvoice amps @1w. I'm thinking the little Figaro or 336. I've heard and liked the 336 but heard not the Figaro and that one is cheaper and looks less vulnerable to my clumsy ways. Anyone here heard one and have an opinion of it as a smallish and cheap workaday amp or others similarly priced ($200 inc shipping) with enough juice to run orthos?

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I'm thinking about upgrading my headphone amp, and since I'm using my Nuforce Icon for headphones right now I might as well upgrade my speaker amp at the same time. I've heard good things about the 840A, but not much about its headphone amp. Anyone have any experience?

Well here is some fresh meat for the peanut gallery. I got this off our resident gear whore Tyrion a while back in a gear swap. The Berendsen IPA 80 is from Germany and retails for about $2000 but they recently pulled out of the US market. From the website and visually there are three transformers one for the pre and one for each side of the amp. They talk about the power of the amp coming from ring emitter transistors ( I have no idea what the fuck that is). I will say this cleanly slays the Krell 400xi I owned briefly and thought sucked. The main bonus this amp presents in a killer headphone amp that is so ergonomically challenged it has me questioning the designers…

From RSA's site: Another amp/dac combo for your portable applications. So many of these are available now. I rather save my hearing for my home/work rig.

I have some experience with the DIY. This project looks quite easy and using cheap parts ( that is important, cause i am used to burn them a lot lol). But do you think the Amp will perform better in balanced configuration. I have HD650 and will use balanced source.

I'd like to get a longer USB cable for my Pico so that I can sit on a couch probably about 10 to 15 feet away from where my computer is. I know I could get a headphone extension cable but I like to be able to control the volume and a longer USB cable would minimize the extra connections an extension would add to the mix. So my questions are, is there a maximum length for USB? If a longer cable is possible does anyone know where to get them in such a length because they're not available round these parts?

-=Hey Guys=- I have my 880s and 650s in another room and was wondering if my 701s can be powered by my Woo3, without distortion, if volumes are kept low. I understand the problems the "3" has with low impedance headphones, but I'm wondering if it's a volume issue, where more power is called for, or it just won't perform at any volume level because the volume control is an attenuator? Thanks USG

the Rawsonte First Watt F5 clone off Agon. He immediately removed the listing as soon as I paid, so I don't have a photo, but I can't believe I caught his ad exactly when he put it up and got it I plan to drive various things with this 25 watter, including HE Audio He1.2b electrostats, Sennheiser HE60, and my various speakers. Offical F5 photo

So I'd like to get a small desktop amp to power my SR-44 setup from my laptop and I was wondering what other options aside from a T-Amp might be out there? Budget (Sub $100 would be preferable) or something along the lines of the Starving Student Millet for speakers would be awesome if such a thing exists.

I was going to post these pics on the other site but this is probably a better site to post these pics on. At a Colorado 7/26/08 meet that I organized, Mikhail traded me a Square Wave w/ DAC for the previous non-DAC one that I had. (It had developed a few problems.) Yay for free upgrade, except when I took it home and used it in DAC mode the next day after the meet there was pretty much no bass. I mean literally. It seemed like everything from 200Hz down was just plain not there. I even compared with a HeadAmp Pico to make sure the problem wasn't with the computer or some other such setting. I asked Filburt and he said this is probably due to the coupling caps. I'll …

Head-Fi: Covering Headphones, Earphones and Portable Audio - View Single Post - REVIEW: Purity Audio K.I.C.A.S. Caliente home headphone amp internal shots via Skylab. Moreover, does it really not suck?

To me these are 100% identical, but I am not expert, so thats why I need your critical / professional opinion please. THX Sylvania GOLD BRAND National Electronics

I'm interested in building the Stax Transformer project here: the STAX Transformer as it seems relatively easy to build but I've searched everywhere I can think of but can't find any reviews on this beast. Has anyone built this project or know of any reviews detailing performance, SQ etc? Tim

Wanting to know the differences between the SRM-252 Mk2, the SRM-252A and the SRM-001. Do all three uses the same amplifier circuit? I Know that the SRM-001 uses a switching supply that I assume that the table top models do not but are the circuits the same?

Does anyone have an idea what's under the hood of the fabled AT amp? I'm giving thought to taking a stab at the amp. Any help would be appreciated.

Yes, this could go in any one of several forums, but the amp/preamp choice is probably the heart of the matter, so here it is. I find I do almost all of my listening -- headphone and speaker -- at my desk now, so I'd like to upgrade my current (and, I admit, quite adequate) setup to something with a little more polish. I'm very happy with the Duet and the Senns, so those probably stay. Source is Apple Lossless from the iMac -- secondary goals are simplicity, reasonable component footprint and (again, I admit) good looks. So far I've looked at: -- SE tube head/power amp (Cary SLI-80) to passive monitors (Dynaudio Audience, Totem Rainmaker or similar) -- SE tube h…

Hey all, first of all, I've searched. Now, picked myself up a CA Azur 840C yesterday and want an amp to match. I'm using modded Denon D5000's. I tend to prefer SS over tubes as I'm a detail/analytic freak. A rule of thumb I assume holds is that the amp doesn't cost more than the source, so that limits the playing field to $1500-ish, which is more than ridiculous for an amp mated to a $1500 source IMO. I was thinking used GCHA, but want to know what others suggest. No op-amps here preferably, unless the circuit is well designed, and designed for said op-amp. I looked into a B22, but don't know who I can get to build one. I'd DIY it, but don't know wher…

I think it may be a weird question. But I am thinking about going for either a high end dynamic setup with RSA B52(with grado PS1) or a high end electrostatic setup with single power ES1 (with stax Omega). Having no experience about them. I wonder whether it is worth at investing on the single power ES1 or RSA B52. if you agree with ES1, how much do you think i should invest on it? My only taste is that super big soundstage and real sound thanks

Hello, first post here! I'm having big problems finding a new amp and dac for my k701s. I was interested in the Corda Opera because it had both an amp and a dac, plus it's sold inside EU wich make it more worthwile (i.e. wont be forced to pay 25% extra at the customs). Alas I read the thread here we you brutaly murdered the corda opera, so what's the alternatives around ~$1500 for and amp/dac or amp + dac? At the moment I only use my k701 but I'm planning on getting another pair of headphones, maybe Grado or something different from AKG. My source is an iMac via optical out, so it'd be good if the DAC had a toslink connection. SS or tube doesn't matter to me. I'd …

Looking for an "endrig" in "till death do us part" or "till my ship comes in." Was leaning toward Pete's new Monster TTVJ but concerned about it's brightness and reports that it may not be as involving as some other choices and well it is $6000! Then there's the BHSE but that marries me to electrostatic when the Monster has such dynamic versatility. And now I'm hearing alot about Craig's amps: the Nautalus and the Balancing Act. However I just talked to him yesterday and they really seem to be on the back burner in terms of production and distribution. So that leaves the Zana Deux and the HD-2(which I know nothing about but have only heard about in passing) I know t…