英国 城堡
Knight骑士系列音箱是Castle的一个经典系列。在保留纯正英国风的方正造型同时，还采用高价值的部件和简约的设计工艺，再一次建立了行业标杆。以其独特的价值，成为一款高品质的立体声扬声器系列。Knight都是选用了特殊混合纤维振膜的中低音单元，统一使用了25mm丝质软半球高音单元。其还有Bi-Wire端子，要追求更高的音质表现可以考虑采用双放大器的驱动方式。
Knight骑士系列的落地音箱从音箱的底部，还可以看到Knight箱体内的特殊隔间，这就是所谓Castle独家的“四分之一波长”设计。它是一种传输线式的箱体设计方法，使得它的低频可延伸到30Hz。落地音箱专门配备了底座。在底板安装好后，箱体内的气流可从这个细缝向四面八方“喷”出。附送的脚钉十分扎实，还具有调整高度的功能。
Knight骑士系列的设计工程师把产品工艺和热情奔放的音色感受放在同等重要位置：追求技术上的精湛，更要实现能在情感和音乐上进行交流。重现近乎于现场演绎是Castle产品的目标。
Castle Knight Series is a five-strong loudspeaker range delivering real-wood veneers with unique cabinet technology for radiant performance.The Castle Knight Series consists of two standmount speakers and three floorstanders. The Knight 1 and Knight 2 are both two-way standmount designs, while the floorstanding Knight 3, Knight 4 and Knight 5 incorporate Castle’s proprietary TPT (Twin Pipe Technology) bass loading system, using the internal volume of the cabinet to extend bass response.
TPT is a new variation on transmission-line loading, delivering deep bass without the ‘boom’ that can result from traditional reflex-port loading.In many loudspeaker designs, room modes are easily excited by forward- or rear-firing reflex ports, which can cause audible resonance at certain bass frequencies. Whilst this can give the impression of a powerful bass response, the resultant ‘boom’ masks other low frequencies, making bass sound slow and poorly defined. Instead, the TPT system utilises the internal volume of the cabinet to extend bass response, delivering a smooth and even result that augments the main bass driver’s output perfectly.
TPT couples the rear output of the bass drive unit to the air in the room via a column of air in the cabinet. This column is tuned to optimise the output of the bass unit at low frequencies in the same way that the air columns in a pipe organ transfer energy efficiently, so the listener feels, as well as hears, the low frequency output. TP or The 'Twin Pipe' refers to the internal layout where the drive unit is positioned part way down a folded, tapered column. This exits through the base of the cabinet and is mass loaded by the air trapped between this 'port' and the plinth.The result is deep, tuneful, well-defined bass from speakers that are easily accommodated in a wide variety of room shapes and sizes.
