Headphone Amplification

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What is the story on the "cryovalve" process? Quote from Tube Depot CryoValve Story:

Get your orders in, folks, don't miss out: https://www.monoprice.com/product?c_id=120&cp_id=12008&cs_id=1200801&p_id=33305&seq=1&format=2

Hi, been lurking for a while but finally signed up! Quick background on my gear: I'm in the Stax ecosystem with an L700(Mk1), SR-3, and an SRM-003. I also have a D10 and T1S, the latter of which was on a shelf unused in the original box for 25 years or so and last year I bought it. I'm still planning to recap it and upgrade it with the constant current mod, but that's to come soon. In the meanwhile, I came across a curiosity online, a homemade normal-bias tube amp. No real info provided, but it was a reasonable price so I took the shot in the dark, and I don't have the electronics knowledge to grok what I'm looking at. Can anyone more educated help me?

Removed due to wrong board post, please delete the thread

Specs Pure class-A, with 20W power draw at idle 16-600 Ohms load (optimised for low impedance) 1700mW into 40Ohm load W 184mm，L 300mm，H 56mm 2.2 KG Sorry for blurry pictures, it is taken from my phone. Better internal shot from the builder: (the transformer is shielded in a metal case as seen in my photo) Exterior The amp is cased in a thick chassis and finished with thick brushed silver front panel. The volume control is metal with texture on it to prevent slipping. Rear of the amp have standard IEC power socket and a pair of RCA inputs. The RCA sockets are gold plated and bolted to the chassis, not direct stressing the PCB. The overall finish is v…

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Hi guys, Has anyone heard the Mapletree Ear+ Purist HD? I've read a few positive remarks about it on Head-Fi but details are lacking. Is anyone able to comment on how it would compare with a PPX3? And another question, how is the standard PPX3 (>$650) compared with the 6SN7 version (>$750) or SLAM? I've always had the feeling that it wasn't worth it to get a PPX3 unless I got the SLAM version (>$800) though. Seems like everyone is telling me that extra $200 is the absolutely worth the money, and it's almost pointless to spend $650 for a standard PPX3. Cheers and thanks guys! Nanoha

It's an amplifier based on the stax t8000. I couldn't find the picture because the inside was not disclosed. It's an amplifier made by a famous Korean hi-fi amplifier maker and it weighs 60kg

Hi, I am not sure if this is right sub section for this and this is my first post a head case My requirement is following: I need to be able to share my music with my gf. So, the main question here is, can I use a y splitter with any amplifier. Lets say with a pico? Or do I need to go only for units with 2 headphone outs. I need a single unit as my UAB DAC/Headphone amp for convenience of moving it around. I am ready to shell out around $1k for the unit apart from headphones. My choices with 2 headphone outs: 1. Meier Audio Opera/ Symphony - Symphony is really costly and for Opera I am getting only the 0,120 ohm versions. Shouldn't I need both h/p outs as 0 ohms 2…

Anyone here have any info about this tube? I read somewhere that this is a higher quality 6AS7G but upon inpection, I see that it has 5998 plates. This is where I'm confused: Is this tube supposed to sound like a 6AS7G or a 5998? BTW, I got my Chatham 2399s when I got my Extreme used and I like it....spacious and detailed but the 7236 trumps it in speed and punch.

I'm about to get a tube headphone amp that uses a pair of 300B tubes and am looking for any recommendations on reasonably priced tubes (under $300 / pair). I'm thinking about getting the JJ Tesla, but would like to hear any other recommendations on 300B tubes. Thanks, Steve

Hi all, First post here. I was wondering if the 6922 has less gain than a 6n2 tube, and are they roughly interchangable? Thanks.

Until now, I've been using the included GE 8CG7s in my 007t. Today, however, I received a set of Japanese-made B&K 6CG7s and swapped those in place of the GEs. I then went through the re-biasing procedures (akin to trying to enter a revolving door in the middle of a tornado). Now for the problem... With the pot turned all the way up, I'm barely getting any volume. This is compared to the ear splitting volumes the 86G7s put out at about 9 o'clock. Are the tubes bad, or did I not bias them properly?

Hi all, New guy here, just like to introduce myself. More of a speaker guy myself, but have recently discovered the virtues of a good headphone. Anyway, was wondering if anyone around here has had experience with the 6H30 tube, using a pair of sov's atm but im not liking the reliability of them (might be bad batch dunno). So was eyeing the electro-harmonix gold pin version, however some sources suggest they have a different pin config. I'm sus of this, anyone know weither this is true or not?

Hey guys, Check out my review if you have the time, just got put up couple of days ago: http://www.6moons.com/audioreviews/headroom2/desktop.html

Hi, I’m going to use 6SN7 in my 006Ts and would like to choose something modern; going through tube specs from Psvane and Linlai it is not clear if their 6SN7 (and CV181… as here they declare only 600mA for filament that is quite strange) can work up to 330V that is the value inside the 006 in their spec (when available) we have Ua (static) … 250V Ua (maximum)…. 450V here is an example … http://www.psvane.com/en/hifiseries/327.html is there anybody that have experience about? are modern tubes suitable for use inside 006 (and similar)? any suggestion about which one should/could be choose? thks 🙂

Hi, Check this 12000 euro amp out. There are so many $10k amps popping out these years. They come from workshops. Actually, I doubt if they are really worth the price. (I am only able to upload 3 pics.) Angstrom Audio Laboratories is back at it again with a statement level Headphone Amplifier of uncompromising standards. MSRP $13,750. Power Output 3,5 watt per channelDual Mono Power Supplyweight 35 KgFull Regulated Power Supply 12 Tubes( 6 x channel)2 ECC802S input/driver stage per channel2 6CG7 double triode in triode composite Circlotron operatingResponse Frequency 12 hz to 150 KhzOutput is in CurrentOutput impedance 10 Ohm to 3 KohmDistorsio…

Hi Everyone, Just got promoted and my Birthday is coming up soon, So I’d like to treat myself with a new Amp. I've just bought a Sennheiser HD 800s Headphones and I'm looking for an Amp to pair it with. Please note the following before answering my question. 1- I have a Marantz Cinema 30 AV Receiver supposedly a top-of-the-line unit that has a built-in DAC. 2- I will mainly use the Headphones for 80% Watching Movies, Football, Sports & 20% for Music " Heavy Metal, Rock and Movies Soundtracks". My Question, 1- Which Amp do you recommend to connect to my Marantz Cinema 30 and my Sennheiser HD 800s Headphones? 2- Is the DAC in the Marantz sufficient or …

In the past few years I've gone through a few headphones but favor the HD600. I recently sold my Headroom Desktop amp and picked up the HRT microStreamer, which is fine for portable use with my Macbook/Android. Drives the HD600 adequately and is good with my Phillips X1. I am interested in trying out the the LCD-2/3/X sometime soon after the new models launch. I've read the microStreamer can drive the LCDs fine, remains to be seen. If I wanted to reinvest in an amp + USB DAC (all-in-one or separates) that happens to gel particularly well with the HD600 and LCDs, are there any decent recommendations going not much higher than $1.5K that I should look into? Seem…

so i received this amp yesterday and i plugged it in last night in the following order. 1. put bendix 6080 tubes all the way in the back 2 sockets. 2. put the sylvania 6sn7 tube in the front. noticed that the metal base was slightly loose and could be moved a wee bit. 3. attached the necessary cables and then turned it on with the headphone plugged in. 4. listened to music. the gear loop is very simple and as follows. lenovo laptop (line out) - mini - rca cable - sp extreme - hd 650s. problem that only occurred last night if i even tap the amp lightly with my fingernail it sounds like it would if i were inside a tube and someone were tappin…

Hey guys I was thinking of getting some kind ofa guide for the op amp based amps (mainly portable commercial design) but other amps are welcome too.. Headroom: Micro Module: AD822 Destop Moldule: OPA2134 Home Moldule: OPA2134 Max Module: OPA627 Pocket Amp 2 V2: LM4881 LaRocco: Pocket Reference 2: AD8610* Xin: Super Macro IV: AD8397* Super Mini: AD8397* Super Micro: ??* Meier Audio: Porta Corda 3: LM6171 HAII MKII/SE: LM6171 Prehead II MKII SE: LM6171 Portaphile: V2/X^3: AD8610 Ray Samuels Audio: Hornet: AD8397 SR71: AD8610 XP7: AD825??* HR2: AD797* Note the amps that hagev an * by them denotes that the op amp can be s…

Hi. This is a $6000 TTVJ tube amp: I'm not gonna say it's arm gnawingly ugly, but even Mr. Takei gets a chuckle at that faceplate. Yet, for some odd reason the headphone cognoscenti lust after it madly. One might start to get the idea that Todd has some kind of wacky function-over-form philosophy. Maybe he should he should start to imitate the Denver business model.

I just unpacked a box from our last move in 2005. I found my HPA V. 1.0 but no power supply. When I packed it to move it was acting up so I just want to get workable power supply to see if it actually works. I believe the basic power supply for the HPA was 12V and 800 mA. Can someone confirm or refute this. Also if you know the dimensions of the power supply tip that would be helpful. Thanks.

One of these just came and went on Agon for $845. Looks like a whole lot of happiness for the money. Anyone know anything about the builder? 807 Tube Stereo Amplifier