新店新试听（三）：德国Violectric V181耳机放大器

mifeng

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我认为是4+褒机因素，表现不太好。
结象有点化开，定位不是太明晰，声场表现也一般。

wujiapeng

LCD最好用的是用胆机。特别像181这样的更不适合。平衡181是玩 好 800和T1最廉价的选择。

mifeng

这么厚声了，还用胆机？

smilence

V200不是说推LCD2不错么

苏苏

想听耶

bydrizzen

原帖由 mifeng 于 2011-12-3 22:39 发表 这么厚声了，还用胆机？

蛋鸡跟厚声有必然联系么？架构啊变压器啊管子啊才是决定性的

wl336

嘛。。。因为lcd3要电流嘛。。。所以这种靠op+buff “糊弄”的是不行的

bydrizzen

原帖由 wl336 于 2011-12-4 00:57 发表 嘛。。。因为lcd3要电流嘛。。。所以这种靠op+buff “糊弄”的是不行的

mifeng

原帖由 bydrizzen 于 2011-12-4 00:42 发表
蛋鸡跟厚声有必然联系么？架构啊变压器啊管子啊才是决定性的

不需要宽厚圆润的音色，还用胆机作甚？

追求胆机石声何不直接取石机？

mifeng

原帖由 wl336 于 2011-12-4 00:57 发表
嘛。。。因为lcd3要电流嘛。。。所以这种靠op+buff “糊弄”的是不行的

实话讲是不太喜欢胆机，嫌麻烦。

除了liquid fire一类没有其他选择？

wl336

lf不是能算胆机啊。。。输出级都是fet。。。

我还真不知道几个电流源输出的耳放

smilence

关于对运放结构的质疑，设计者邮件中是这么回应的（转自headfi），我也不懂电路，大家看看就好：

Fried's Response:

Quote:
I know about the issues that some people (namely XXXXXXX) have against "cheep" op-amps. In my opinion (and I posted it somewhere here on head-fi) there are several good reasons to go for dedicated or specialized op-amps when the topology of the circuit is demanding it.

Also (my opinion) there are only a few reasons to go for discrete op-amps as these are build with the same
circuitry that can be found in the integrated ones. But they will have temperature and/or aging problems in the long run.

All the op-amps we are using are situated in sockets so they may easily be rolled if someone is expecting advantages.
Nobody did until now !! Or he didn't posted it.

Unfortunately most "sophisticated" op-amps ask for a minimum of gain to run stable and without hazardous oscillation.
Most of the op-amps in our circuitry are designed for impedance matching. Some even perform reciprocal gain e.g. when Pre-Gain is set to -4 dB this means a voltage loss of -12 dB (a fourth) over the complete amp. This can't be done with most "sophisticated" op-amps !

Our overall gain in our amps is very low to achieve a black background which is often very positively noticed by our customers. It is much harder to design an amp with low gain compared to one with high gain. Because the lower the gain the more the chance for oscillation and vice versa. And I don't know if you will find any other amp with reciprocal gain in the market.

smilence

这是一家同时经销Burson HA160和Violectric V181的代理的个人意见，认为burson是吹出来的东西（虽然这个似乎本坛都已经公认了）

I've also been researching researching the Violectric v181 vs Burson HA-160 and so I emailed Robert of "http://aphroditecu29.com/" since I saw that he sells both these models. This is the reply I got:

Quote:

The Violectric V181 and V200 are far superior amplifiers. I personally prefer the V200. It performs as good or better than units costing 3 times it's asking price. The best amp at any price=) Yes, the V181 sounds excellent in balanced mode, but when listening SE it only has half the specs or power. Because you are then only using 2 of the 4 amplifiers. Unless you are really dedicated to terminating your entire headphone collection to 4 pin xlrs, the V200 is the way to go.


The Burson is highly overrated. Where the V200 easily outperforms it's asking price, I don't feel the Burson lives up to it's asking price. The reason why there are so many positive reviews, is because one of the dealers in the USA was offering a $30 discount on the amp if the customer wrote a review of the amp. So needles to say, most of what you read about it is unreliable. I do realize that on paper the Burson looks really good, but in reality it doesn't sound very good.

myzcj

看德国人的做工就很舒服啊