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3L设计漫话 [复制链接]

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41#

坊间普遍认为,胆音频电路几十年前已经成熟...... 果真如此?

这常见的12AX7 / ECC83,怎样用才能达到最佳效果?

μ=ΔEp/ΔEg     Ip为常数

rp=ΔEp/ΔIp     Eg为常数

gm=ΔIp/ΔEg     Ep不变

几十年来,三条式子安躺教科书中,有谁去深究其含义?
最后编辑3L-AUDIO 最后编辑于 2009-03-29 05:47:19
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42#

新一代Classic Boy

两路两单元,继续选用seas。



中低音单元 H1488-08 L16RNX



高音单元 E0006-06 T25CF001
最后编辑3L-AUDIO 最后编辑于 2009-10-21 02:50:04
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43#

H1488-08 L16RNX

L16RNX is a 5” High Fidelity woofer with an injection moulded
metal chassis, intended for bass reflex and transmission line designs.

Stiff, yet light aluminum cone and low loss rubber surround show
no sign of the familiar 500-1500 Hz cone edge resonance and distortion
assosiated with soft cones.

A bumped back plate in the magnet system, together with the very long and light weight copper clad aluminum voice coil, allow extreme coil excursion with low distortion.

A heavy copper ring below the T-shaped pole piece reduces non linear and modulation distortion.

Extremely stiff and stable injection moulded metal basket, keeps the critical components in perfect alignment. Large windows in the basket both above and below the spider reduce sound reflection, air flow noise and cavity resonance to a minimum.

This driver use Seas SpiderRing® technology.

Frequency response



The frequency responses above show measured free field sound pressure in 0, 30, and 60 degrees angle using a 28L closed box. Input 2.83 Vrms, microphone distance 0.5m, normalized to SPL 1m.The dotted line is a calculated response in infinite baffle based on the parameters given for this specific driver. The impedance is measured in free air without baffle using a 2V sine signal.

Specifications



*IEC 268-5 SEAS reserves the right to change technical data

E0006-06 T25CF001

The T25CF001 is a 25mm fabric dome with moderately high efficiency.
An optimally shaped dome and a wide SONOMEX surround, both manufactured by
SEAS, ensure excellent performance and consistency.

Low viscosity magnetic fluid which provides excellent cooling while maintaining a low resonance frequency.

6 mm solid metal front plate with a slight loading characteristic which ensures
linear frequency response, and a stiff and stable connection to the cabinet.

A substantial injection-moulded rear chamber, with complex internal shape and
reinforcing ribs, which eliminate unwanted chamber resonances and reflections.

A double magnet system which increases sensitivity and provides better control of the voice coil.

This system also reduces the magnetic stray fields, making the T25CF001 an ideal choice in high end A/V applications.


Frequency response



The frequency responses above show measured free field sound pressure in 0, 30, and 60 degrees, mounted in a 0.6m by 0.8m baffle. Input 2.83 Vrms, microphone distance 0.5m, normalized to SPL 1m. The impedance is measured without baffle using a 2V sine signal.


Specifications



*IEC 268-5, via High Pass Butterworth Filter 2500Hz 12 dB/oct. SEAS reserves the right to change technical data
最后编辑3L-AUDIO 最后编辑于 2009-10-21 02:51:23
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44#

配套准备的DD。


8mm铝板铣出来的接线板。
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45#

配合使用大型接线柱。

















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46#

原帖由 天神 于 2009-9-11 15:27:00 发表
顶3L兄!

3Q
天神兄今年收了什么好茶?
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47#

原帖由 chm999 于 2009-9-11 17:19:00 发表
顶真正的音响DX!

谢......
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48#

原帖由 selohero 于 2009-9-12 13:58:00 发表
亮点是接线板

图纸下周发给你,北美法拉利就看你的.......
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49#

原帖由 Wilmer威馬 于 2009-9-12 14:44:00 发表
3L 兄是我自踏足 168,多年来唯一尊敬的真正 DX!

惶恐,谢威马兄!
威马回广州时电我,找时间聚聚。
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50#



这对Classic Boy“驾世仔”书架箱完成于2005年秋,专门为Jsming兄而作,世上仅此一对。

中低音单元亦为本人设计,高音单元为SCAN-SPEAK D2905/950000。



整体设计一气呵成,没作任何调整。

这次回炉,只更换箱内线、接线板及接线柱。


































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