Headphone Amplification

i've seen a couple of these on sale recently, and was wondering if anybody has any impressions of this amp. google doesn't turn up much, except some HF threads which, because of the reshuffled urls, lead to dead links. i remember reading somewhere that it shares the same circuit as the RA-1, which in turn has often been referred to as a glorified Cmoy. i'm not sure what to make of that, so if anyone can enlighten me, it would be much appreciated. *and for anybody who might be interested, the person auctioning the one on eBay is also auctioning a pair of RS-1s. The picture of the HPA-1 shows a pair of RS-1s with the brown leather headband beside them, so i assume it is…

So apparently they followed the "Glass FX" tube DAC and integrated with a headphone amp. Dual 12AX7As. http://www.jolida.com/product/glass-fx-tube-headphone-amplifier

Jonokuchi, from Pete's home page. His latest single ended desktop amp, complete with boards(on his ebay store), Edcor transformer package, and Front Panel Express info and files for the enclosure. A very neat looking build. Hat's off to Pete.

Here is something that has been cooking for a while but I've been just too busy to do anything about it. So JR Audio out of China have been building our amp designs for a while now and I started to hear horror stories almost immediately. They naturally have no right to use our designs and work in their crappy products but since when has that stopped anybody... I have been looking for one of these amps for a while now as I want to rip it apart and well... one owner contacted me. I'm going to ask him to come here and tell his story which is quite the tale. Let's just say Caveat emptor... So here is the amp and it arrived dead which will soon be clear. It is the K…

Well I just bought a NuForce Icon Mobile, for my first amp/dac. I will be using it to power my Denon Ah-D2000, which I am absolutely loving so far (Have had for about a month, maybe a bit longer). HeadphoneAddicts review suggests good synergy with them so I figure i'll give them a try. When I get them I will do the same kind of thing I did with my headphones, I will do an initial review and then an After burn in review :] Hopefully will be of use to other people. This will be my first amp/dac experience so I am intrigued on what changes this will make to the sound. The amp will be coming in 1-3 days, wish me luck hopefully I don't spill things in excitement when I…

I just bought the SR-009 which should be here soon. I have resisted buying them forever because I never really warmed up to its sound signature when I have listened to them, even via Blue Hawaii SE. Yes, I am a lover of single-ended triode (mostly 2A3 and 45) sound. I don't listen to stuff with lots of bass of dynamic jump, so these days I'm happy listening to my Stax O2 MkI, Senn HE-60 (woody), and HE Audio 'stat via Stax transformer with my 2A3 SET or EL84 sigle-ended pentode speaker amps. SR-009 should be easier to drive than O2, so that's good, but obviously, a dedicated 'stat amp will be needed at some point. Blue Hawaii SE, hopefully with some tube, cab…

I had a fun 20 mins chatting with Mikhail, speccing up a high voltage Supra for my newly acquired R10's. After saying 'yes' to most of the options (mostly having Blackgates all around), two things that were sticking points for me were the Plitron transformer ($900 vs $250 for an upgraded Supra Transformer) and Audio Note coupling caps (again around $7-900 - bit hazy here, vs $360 for V-Cap Coupling Caps). My question for those who have been able to do a comparison, is what difference does a Plitron transformer or Audio Note coupling caps make and is the extra cost worth it? If you had to choose one upgrade, which would it be? I'd appreciate your thoughts on this …

I have been reading a lot of post, reviews and opinions, they have been informative, helpful, confusing and sometimes funny. Yesterday I was reading a post and I saw a picture of a cat showing his balls!! Anyway, I have done some research on amps, headphones and cd players. I came up with a system based on reviews and opinions only. I will probably not get a chance to hear first then buy. So for now I have to go by, like I said reviews, opinions and recommendations. So this is what I came up with: I could go cheaper or more expensive, this just seems to be solid, but I am at best, a amatuer. Einar Sound VC-01i Amp Audez'e LCD-2 Headphone Bryston-BCD-1 CD Player T…

Hi, I'v been a long time member on Head-Fi, and decided to check out this forum (for a number of reasons). After reading multiple threads here, it seems there are a lot knowledgeable people here concerning the AKG K1000. I have 2 K1000's, one is hooked up to a Unison Audio Unico, which I find a great combination. I'm looking for a cheap amp, to set next to my iMac, so I can use my other pair with my computer at night. I read multiple recommendations, Class-T Amps, old Marantz and Panasonics (PX950 etc.). I searched, but they were actually quite expensive now on ebay (650euro+ ). I have a bass-light pair, so a little more bass on the amp is appreciated, maybe a bi…

With my SP K1000 power amp nowhere to be seen, and with a potential need for a budget power amp for my Epos ELS-3 that I have setup for TV/Cable/DVD purpose, I've been reading about some gainclone amps. Most posts/threads about them are favorable and they seem to be great bang-for-buck. With that, anyone here has any idea how well (or not) gainclone amps will work with K1000's? My thinking is if it works well enough, I'll get one and use it to tide me over until SP power amp shows up, after which I'll use it with Epos.

We’re launching a new company – Eksonic – along with our new amplifier called Aeras. Launching an audio company is something I’ve had in the back of my head for many years and I’m proud to be able to bring a passion to market. I've been building my own version of the DIY T2 for quite some time now and have long hoped to capture the spirit of the beast in a smaller single chassis design that's more accessible to many. We think we've accomplished that with the Aeras. Aeras is the result of endless hours of circuit design and analysis, brainstorming and many iterations of prototyping and testing. Our initial users have had great things to say about…

Hi, First post here. I am curious about building an electrostat HPA as I only have an SRD7 Mk2. I am interested in some of Kevin Gilmore's designs like the KGSSHV variants and the T2, but the legend about the KGSSHV seems to ring true that it is hard to build and hard to learn about. Is there somewhere I can read about these different designs in white paper format like Nelson Pass does with the First Watt amps? I can't even find schematics or a BOM. It's truly a nightmare, and I don't want to endlessly bother spritzer with questions. Frankly, I am not totally sure of the "authorship" of each of these amps which makes it harder to research. I was considering firs…

What is a reasonable price for a used KGSS?

I'm hoping Justin, Mr. Gilmore or Spritzer will see this thread and hopefully tell me what's wrong with this KGSS. This unit is over 7 years old and features Alps volume controls as opposed to the newer DACT controls. The serial no. written in red pen on the circuit is #1000. The issue with the amp is a noisy humming emitting from both channels past 0 position. The humming sound is distinctive to the transformer and is very audible at modest volume. I've isolated the issue without plugging in a source. I've made sure my SR-007 is working properly on the SRM-007t and SRM-717. The problem persists on both RCA and XLR. I've taken several pictures. I have not touched th…

Hello everyone, I'm thinking about buying an electrostatic amp and I'm leaning towards the KGSS because of my general dislike of tubes and the fact that when you change the tubes you can change the sound etc. I prefer to have such things under control (barring damage, SS is the same now as it is in a year). That said if the BHSE is only uses the tubes for the high voltage swing capabilities and is entirely transparent then maybe that's a better bet. On paper it has a lot more voltage swing etc. At least initially I will be using the Koss ESP950s but I figure I'll end up with O2s as well. They'll all have to go though my correction process and then I'll see if el…

Has anyone an ideal as to when this unit will come out and an estimate for it's price? Thanks

Just picked up a DIY Kludge headphone amp. The base circuit came from a Vacuum Tube Valley #11 on page 24 and 25. Here is the link: https://web.archive.org/web/20131122141643if_/http://www.jumpjet.info/Pioneering-Wireless/eMagazines/VTV/VTV11.pdf A few minor mods were made to improve the performance, such as additional power supply filtering, HEXFREDS, DCed all filaments, etc. This amp sounds great. Has NOS Tung-Sol 6080 and 6SL7 tubes. Has plenty of power. Easily drives Abyss 1266 phi.

Dear fellows, Maybe you can help me with an advice. A friend of mine gave me a Koss head amp E/9B but without the suited headphone. I want to know whether it is possible to play a Stax headphone (normal or Pro Version) through this head amp. If it does not work - it is possible to convert the Koss working with a Stax headphone, maybe by building an adapter? Many thanks in advance. I wish you a great happy new year 2018. Best, Andreas

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Damn you LAiV. Just after I’m satisfied with your Harmony µDDC and µDAC you release a new, cheap combo DAC-headphone amp. Yo Rob!

Hi guys, I wasn't quite sure where to put this thread since the DA10 is a source, but it has a headphone-out. Since I'm referring to the headphone-out, I guess it goes in the amps section. So. Has anyone tried the DA10's headphone out with a high-end A-T? Actually, I'm basically looking for a $1000 source + amp setup for high end A-T's so that if a 45th anniversary headphone comes out, I'll be ready. (And if not, I'll just get a W5k.) I can't afford the matching amps (HA-5000 for example) or else I would only need to look for a source. The DA10 is just one of the many options I'm thinking about. Well, I don't want a setup along the lines of Zhaolu -> Dynahi.

Do I need to do anything to run balanced headphones out of the XLR outputs on the Lavry? Can I simply get someone to recable the headphones terminated in female XLRs or do I need to do something different? I currently have the jumpers in the Lavry set on balanced output mode.

Hi Guys I run a KGSShv that take about an hour to warm up and sound 100% performance. Because of that I tend to leave it on all the time unless I am going away for a few days. My question, is it ok to do that and leave the headphones plugged in, or is it best to power down? The headphones would i guess get a 580v bias but no music signal during this time.

With my feel HP 200SE tube mosfet hybrid amp, whenever I have my headphones pugged into the low gain jack, every now and again the left channel fades out to a whisper. If I turn the amp off and then turn it back on it corrects itself and won't fade out again that listening session. I know that amps are complex but is there an obvious reason why this would be happening?

When my Mjolnir SRM-006t is connected to my AGD D27, the left channel is much quieter than the right, and there's a beeping/static noise in that ear which responds to volume control. This happens to both my 950X and SR-007. The D27 is connected to my PC via USB, and does not exhibit this behavior when my computer speakers are connected via RCA. I've tried swapping the balanced XLR from left to right on the e-stat amp and and had the same issue, i.e. the issue didn't follow the balanced connection. I've also measured the voltage when the amp is on in the places indicated with identical results on both channels. Even with the D27 volume control bypassed the issue remains. …