英国老头Graham Slee的问题

小白

交易区新帖推荐

Graham Slee在他的网站下新开了一个论坛. 主页在这里: http://www.gspaudio-community.activeboards.net/default.asp

今天偶尔浏览时看到老头发表的一帖. 在这里: http://www.gspaudio-community.activeboards.net/forum_posts.asp?TID=8

原文不长,贴出如下. 是关于耳放有两个耳机插口的分析:

I'm told headphone amps with two output jacks sell much better than those with one - especially in the affordable sub £200 price band.

But what happens when the two sets of headphones are of different impedances? I mean, headphone users aren't known for buying two identical pairs on cost grounds alone? On the other hand I'm sure a lot of us have at least a couple of pairs of different headphones?

If one pair is low impedance and the other pair is high, then the relative sound pressure levels are going to be different. So much for the value added idea of kitting an amp with two headphone sockets.

I guess two amplifiers could be incorporated in one box? That would sort out the impedance difference. But then what if you wanted to play the music loud and your partner wanted to listen quiet? That suggests two volume controls, doesn't it?

And maybe you like Rock music while your partner likes Orchestral? So we now require two totally separate amps with separate inputs in the one box.

But then you decide you want to listen to the same music

But that means joining the sources - what a mess!

OK then, how about if it had a switch that selected separate inputs or commoned inputs? When switched to the common position the other pair of inputs could be used as a chain out. But then in an utopian world it would be great to have both inputs as chained pairs, but in a sub £200 unit that may be stretching it a bit.

So, without the utopian bit, do you think such an amp would appeal?

The cost of two amps would normally put such an amp beyond £200 GBP, but I've been developing a rather nice sounding discrete bi-polar stage and transistors can be obtained and implemented quite a bit cheaper. It's the hardware after all that is the major cost of any design.

Just wondering what to do with this design? How would you reason it out?

[ 本帖最后由 小白 于 2008-1-23 12:38 编辑 ]

headfan

越搞越复杂  呵呵

小白

我回了他帖. 大家有兴趣也可去那里讨论讨论.

ellennet

老头还真以为有人买1个耳放2人听？

小白

你看看我的跟帖,说得有没有道理.

ellennet

我家买了个1拖2的无绳电话蛮贵的，貌似功能很多，但我向来只是接电话打电话，连电话簿都没用过

小白

原帖由 ellennet 于 2008-1-23 13:18 发表


我家买了个1拖2的无绳电话蛮贵的，貌似功能很多，但我向来只是接电话打电话，连电话簿都没用过

你就是那种买了带10个耳机插孔的耳放,却老插一个耳机的人. 那九个洞,就看看.

ellennet

我才不会去买9洞耳放，明显不可能推好9种不同厂家的耳机   

如果这个9洞耳放能把某个耳机推的非常好那8个洞摆着看也不是不值得的，当然能做出好耳放的厂家绝对是做不出9洞的

wujiapeng

普通消费者都是贪心的.当然越多孔越好

高斯静

只要孔好,一个足矣

安润技术支持

你那个英文偶看不懂！能说说大体的意思吗？

子木

HA2002/HA5000，双孔，并联，

Rockband

只有一个孔的飘过

newstorm2007

正如小白所说，一个耳放如果有两个放大独立的放大单元，那可能两个单元都可能无法“尽力推好”；因为这和供电将有一定关系，以及内部电路的分离度有一定关系。
作为一个发烧友来说，对于这种产品的问世可能会不屑一顾。就像真正的音响发烧友很少用多媒体听APE，影视发烧友不会用电脑看大片，普通的音乐发烧友也不会用手机听音乐一样。这很类似，就是发烧友对品质的追求已经远大过对多种功能集成于一体的便携性的关注。

nadesicozhao

很简单的问题
那就是老头子的产品定位
如果是给资深发烧友用的，1个孔足矣
如果是一款迎合大众的产品，2个孔，声音差点，一点问题都没有