走出国门看世界，寻找驱动HD800和PSK的极致利器之TTVJ millett 307A篇

davidxtb

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下午浏览隔壁网页（HEAD-FI），看到那帮人提到一个评价很好的极品二房TTVJ Millett 307A，然后跟着搜索这款二房的相关信息，看到居然WOO AUDIO居然是华人Jack Wu开的。然后在那个关于HIFI SHOW2008的报道中，最下面说TTVJ Millett 307A是那届HIFISHOW的最好声音。
这台二房的档次应该是与比RP010B MKII（3500美元）和BALANCING ACT（3500美元）更高级别的东东，价位上与RSA的B52（

5,350美元

）同等价位的。
TTVJ Millett 307A Headphone Amplifier    Pelican Case (+$550.00)
Now available and shipping!!!
Get the 307A now before prices go up. This is the introductory price !!!
The TTVJ Millett 307A Headphone Amplifier is aremarkable single-ended vacuum tube headphone amplifier.
It was designed and built for one purpose andone purpose only - to provide the best possible
sound from headphones.
Combiningthe best of classic design and modern components, it provides a listeningexperience unlike any other headphone amp available.

The307A is a single-ended triode amplifier which employs transformer coupling,providing truly balanced inputs and outputs. The carefully designedsingle-ended circuitry uses only two triodes, which results in transparency and musicality that no otheramplifier topology - tube or solid-state - can match. This amplifier is not mass produced nor built bysemi-skilled labor.
It is hand crafted,one at a time, by its designer.
All ofthe transformers are custom wound by hand in the USA by one of the finest audiotransformer producers in the world, and were designed specifically for thisamplifier.
When it comes to soundquality, no expense is spared and no shortcuts taken.
But you'll not find superfluous frills in the307A either - no gold-plated chassis nor the latest audiophile fads.
This is an amplifier like the old Western Electricwould have built, using today's components.

The transformer-coupled output is capable ofdriving virtually any headphones, including notoriously hard-to-drive modelslike the AKG K1000 and low-impedance phones like Grados.
A selector switch allows the user to selectbalanced or unbalanced outputs, and provides two impedance settings to optimizecoupling from the output tube to the load.
A special setting for high-sensitivity in-ear monitors (IEM's) isprovided as well.


Though it can be driven by a preamp, for optimumsound quality the 307A provides three inputs (selectable by a front panelswitch) and a precision stepped attenuator volume control, so it can bedirectly connected to a CD player, phono preamp, or other source.
Special attention was paid to make the 307A as quiet as is possible fora tube amplifier.
The tube-rectifiedpower supply uses a massive choke-input filter.
And the directly-heated output tube's filaments are driven by a special DC constant-current regulatorcircuit.
This, combined withtransformer-coupled inputs that have extremely good common-mode rejectionresult in a very quiet amplifier.

Inside, the 307A is hand-wired usingpoint-to-point wiring above a solid copper foil ground plane.

Components are located as needed to providethe most direct signal path possible.
This technique is expensive and labor intensive, but results in thehighest fidelity and lowest noise possible.

The tubes used in the 307A are a bit unusual andprobably won't be familiar to most audiophiles.
Though they are uncommon, they are not rare, and old stock is readilyavailable.
After extensiveexperimentation they were selected because, quite simply, they are the bestavailable for the job.

The input stage uses a 7N7 tube, which is a"loctal" variation of the familiar 6SN7 dual triode.
The 7N7 is used because very high-quality,old-stock tubes are available that outperform any modern 6SN7 tubes.
The output tube is a 307A directly-heatedpentode, which when triode connected makes an outstandingly linear poweramplifier.
The 307A is
a cousin of the famous 300B, but is bettersuited to the lower power required in a headphone amplifier.
And the 5V4GB rectifier
was selected for its slow warm-up time andhigh reliability.

But what does all this mean?
The bottom line is how the 307A sounds.
And it sounds wonderful.

Look for upcoming reviews in TONE and STEREOPHILE magazines!.

Ready to ship in 2-4 weeks once you place your order!

[table=98%][/table]http://www.ttvjaudio.com/index.php?main_page=product_info&products_id=1193
http://203.208.39.132/search?q=cache:J3yIP3NT42cJ:www.ttvj.com/index.php%3Fmain_pa ... fier+%245995.00&;cd=1&hl=zh-CN&ct=clnk&gl=cn&client=firefox-a&st_usg=ALhdy2_mo0naEOr6eJbVlHlx_Yt3SSJoQg

[ 本帖最后由 davidxtb 于 2010-3-8 00:43 编辑 ]

mifeng

这些高级耳放的外观设计统统有点问题。。。除了ray的，结果来个声音不好。。。

davidxtb

最近英文水平下降严重，看那些东西都似懂非懂的，只能发了链接，高手去看了
http://www.head-fi.org/forums/f1 ... e-amplifier-342713/
http://www.stereomojo.com/HeadFiShow2008/HeadFiShow2008.htm
http://www.head-fi.org/forums/f5 ... highlight=TTVJ+307A
http://www.head-fi.org/forums/f5 ... highlight=TTVJ+307A
http://www.head-fi.org/forums/f1 ... highlight=TTVJ+307A
http://www.head-fi.org/forums/f1 ... highlight=TTVJ+307A
http://www.head-fi.org/forums/f1 ... highlight=TTVJ+307A
刚才找到它的PP

davidxtb

外观比较朴实了，但价位着实有些雷人，最近美元贬值厉害，这种五千多美金的东西MS并没有给批说价格如何虚

davidxtb

那边关于推HD800和PS1000的二房中，测评中这款二房的表现比较优秀（价格，万恶的价格，还要等人民币再升值才行）

tedczj

看到改了双线平衡的701了，那条是啥线? e线么？

davidxtb

未必吧，国外很多都是用APURESOUND V2/3改的K701

junerpp

这比Woo Audio的W5 还贵，是Singlepower之后美国最贵的二房了吧，看评论走的是高解析的路线

tedczj

这么问是因为ttvj自己是卖改e线的701的

junerpp

原帖由 davidxtb 于 2010-3-7 21:55 发表
那边关于推HD800和PS1000的二房中，测评中这款二房的表现比较优秀（价格，万恶的价格，还要等人民币再升值才行）

从国内购买这么贵的机器，会不会被收关税？20%？

davidxtb

上次冼继回美国后可能是准备入PSK（最近确认已经入了），入了一台RSA的The Raptor猛禽。到手后的听感也是声音干练风格的，强调解析和动态，百搭各种耳机。他的PSK估计这几天可以到手，到时候再问问听感如何。
如果不是商品机型，邮寄过来应该不至于被关税20%吧。

[ 本帖最后由 davidxtb 于 2010-3-8 00:49 编辑 ]

36540155

这东西就是高烧自娱自乐
不大可能量产吧？

musicforever

太贵了吧

keywaltz

woo的东西貌似外观没这么对不起观众吧，估计是Beta版本