- 积分
- 452
- 在线时间
- 995 小时
- 最后登录
- 2023-5-21
- 阅读权限
- 120
- 精华
- 0
- UID
- 793719
- 帖子
- 438
- 精华
- 0
- 经验
- 452 点
- 金钱
- 401 ¥
- 注册时间
- 2015-6-1
|
楼主 |
发表于 2016-2-22 15:27
|
显示全部楼层
手邊現在沒辦法實測,計劃轉移至Hiraga了;已經有寄板子給幾位兄弟,等他們裝好應該可以測試。
查了官方網站,並沒有提供詳細數據,不過網友使用DT990/600R的說明:
With the 600 ohm DT990s I used the minimum amount of feedback possible, with good result. And the sonic signature of the Bijou made it a better choice for the DT990’s.
這跟我的使用經驗是相符的,高阻耳機的推力不是問題。
BTW,高阻耳機可以考慮不使用可變電阻,官方說明:
The Bijou is equipped with a variable NFB circuit. This helps the amplifier handle the range of headphone impedance from 32R to 300R. However, very little feedback is needed for high Z headphones. Some listeners may prefer no feedback at all.
If you are sure that you'll only be listening with high Z headphones, you can remove the feedback and improve the bandwidth of the amplifier by doing the followng:
Eliminate the 250kΩ feedback pot
Remove (or don't install) R12
Change R1 from 10kΩ to 300Ω
There are no harmful effects from this change. And you can always install the components needed to include the variable NFB capability. |
|