Krell生产的此机及此前推出的KSA50、KSA80被各界誉为最靓声的Krell功放,其中KSA50是Krell第一台功放,也是它家的顶峰之作(就音色而言)。直至今天,美国极品音响名牌PASS的首席设计师、另一个极品音响名牌Threshold的创立者Nelson Pass也说,KSA50的线路要比现时95%的HI-END功放出色。
而KSA50的线路现时还没有人公开。但据鬼佬讲,KSA50的线路前半部分与KSA100是相同的,我的理解是:KSA50与KSA100线路上的区别,可能仅仅在于输出功率管的多少、电源电压的高低不同。
下面是KSA100的线路图。此线路相当简单,较适合于DIY友仿制,事实上外国也有相当部分人仿制————Krell后期推出的机不知复杂了多少倍,但是音色却比不上这第一代机,哈哈,DIY者有福了。下面是原理图和照片
下面是原理图
The insides; very dirty after years of use. The fans only make it worse.
Side view of the heatsink/output assemblies. Dirt, dirt, dirt...
The cover, face plate and amplification module have been removed. The amplification module contains the main board, output stage and fans.
View of the inside rear of the amp showing the series resistors for the fans.
The transformers/harness have been removed and all that is left are the main cap clamps.
The main harness (including the transformers) was assembled at the factory in a jig outside the amp. It is removed as a unit.
Under the right channel transformer, the serial number of the unit was engraved at the factory.
The chassis has been cleaned and is ready to have the transformers and the rest of the main harness installed. #p#分页标题#e#
The transformers/harness has been cleaned and installed.
The face plate back in place.
A view of the amplifier modules before disassembly and cleaning.
The main board has been cleaned. It includes everything up to the output stage.
The output stage has been disassembled from its bracket. The condition of the silicone heatsink compound must be assesed and replaced if necessary.
The cleaned amplification module ready for installation.
Almost done...
|