为什么八爪鱼喇叭单元正面很漂亮，反面却是光屁股？不解！

sdlaozhou163

图片很值得看看

潮烧王

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光芒四射 发表于 2018-9-25 16:20
喇叭盆架的模具比较贵，搞个比较不同的喇叭结构，让国内山寨不是那么容易抄。

说的好，支持，也是这么想的

高伯伯

好牛逼的低音

高伯伯

又是一只八爪鱼

狱霸

看上起很塑料啊，这爪子

高伯伯

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狱霸 发表于 2018-9-25 20:34
看上起很塑料啊，这爪子

高伯伯

找点数据让大家一起分享一下。

Volt RV4564 18" bass driver

High power handling with low power compression for maximum dynamic range and accurate bass with Radial reliability

The RV4564 bass unit is optimised for accurate bass reproduction. It has a massive Xmax, a symmetrical field magnet and extended centre pole for linear excursions up to 25mm peak to peak with accuracy and control. The critically doped carbon fibre loaded cone maintains rigidity for transient punch and slam. It features three cooling systems: a vented magnet, the patented Radial chassis and a multi-finned magnet intercooler. This technology keeps voice coil temperatures exceptionally low and substantially reduces power compression to maintain the full dynamic range even after prolonged operation. Additionally the stability of the Thiele-Small parameters resulting from cooler operation preserves system bass performance at high levels. The RV4564 is intended for use in high power professional studio monitors and sub bass systems.

Technical Data:

Frame diameter: 459mm
Sensitivity (2.83v/1m): 93dB
Nominal impedance: 8ohm coil
Frequency range: 30-500Hz
Moving Mass (Md): 235g
Force factor (BL): 25.7Tm
Excursion max: 44mm
Voice coil diameter: 100mm
Nominal power handling: 750w
Overall depth (front of frame to rear of magnet): 215mm
Fixing holes: 8 x M* diameter on 440mm PCD
Cutout diameter front mount: 417mm
Cutout diameter rear mount: 398mm

Fs 26Hz
Re 5.8ohms
Qa 3.94
Qe 0.34
Qt 0.31
Vas 238litres
Xmax +/- 12.5mm
Sd 1029cm2
Vd 1286cm3
Le 3.8mH

宁波先生888

内衣外穿

高伯伯

宁波先生888 发表于 2018-9-25 21:09
内衣外穿

嫑仵作。

高伯伯

再来一只八爪鱼的数据

The RV3863 is a unique bass unit, featuring two cooling systems. In addition to the conventional rear vented magnet it uses Volt's patented front mounted Radial chassis, which acts as a giant heatsink. This keeps the voice coil and magnet temperatures exceptionally low, resulting in superb reliability, 3dB less power compression and tight, clean bass even after prolonged use at maximum power.

The RV3863 has a symmetrical field magnet for absolute linearity and transient control on high power peak inputs and it's innovative design has produced a breakthrough in high performance and reliability.

Technical Data:

Frame diameter: 381mm
Sensitivity (2.83v/1m): 94dB
Nominal impedance: 8ohm coil
Frequency range: 25-500Hz
Moving Mass (Md): 110g
Force factor (BL): 19.0Tm
Excursion (lin-max): 38mm
Voice coil diameter: 75mm
Nominal power handling: 400w
Frame diameter: 381mm
Overall depth (front of frame to rear of magnet): 179mm
Flange thickness: 15mm
Fixing holes: 8 x 6.5mm diameter on 370mm PCD
Cutout diameter: 357mm

Fs 35Hz
Re 5.6ohms
Qa 3.50
Qe 0.38
Qt 0.34
Vas 150litres
Xmax 7.5mm
Sd 760cm2
Vd 570cm3
Le 3.4mH

高伯伯

再来只乌贼鱼

BASS MIDRANGE LOUDSPEAKER 310mm (12")
Bass in Studio Monitoring Systems

FEATURES: The RV3143 is a unique loudspeaker. It features two cooling systems. In addition to the conventional rear vented magnet it uses the patented, front mounted, Radial chassis which acts as a giant heatsink. This keeps voice coil and magnet temperatures exceptionally low resulting in superb reliability, 3dB less power compression and tight, clean bass even after prolonged operation at maximum power. By maintaining low voice coil temperature there is less change in the Thiele-Small parameters thus system alignment is better maintained after prolonged high power operation. The RV3113 has a symmetrical field magnet for absolute linearity and transient control on high power peak inputs. Innovative design has produced a breakthrough in performance and reliability.

Nominal Diameter 310mm
Power Capacity 300watts
Sensitivity 91.5dB/watt/m
Frequency Range 29-700Hz
Impedance 8/16ohms
Bl Factor 18N/A
Voice Coil Diameter 75mm
Voice Coil Material Copper
Maximum Excursion 30mm (before damage)
Magnet Assembly Weight 5Kg
Effective Moving Mass 76g
Compliance 0.00027M/N
Volume displaced by unit 3litres
Connection Metal push terminals
Chassis Painted diecast aluminium

Overall Diameter 310mm
Mounting Bolt Circle Diameter 294mm
Number and Size of Bolts 8x M6
Baffle Cutout Diameter 280mm front mount
Baffle Cutout Diameter 280mm rear mount
Depth 137mm below front flange
Depth 152mm total depth
Weight 6.8Kg.

Fs 35Hz
Re 6.1ohms
Qa 5.35
Qe 0.32
Qt 0.30
Vas 86litres
Xmax 5.2mm
Sd 479cm2
Vd 249cm3
Le 3.2mH

老浦东

低频频响标得有水平！！！

高伯伯

老浦东 发表于 2018-9-25 22:00
低频频响标得有水平！！！

LPD宝刀未老。性欲旺盛。

willie1000

Volt是一家英国专业设计、生产发烧音响驱动单元的厂家。多年来一直专注于设计和生产中音和低单扬声器驱动单元，是英国最优秀的单元设计和制造品牌。 其中，最为著名的单元是采用RADIAL TECHNOLOGY(径向技术，中国发烧友俗称为"八爪鱼")的单元。

willie1000

从本质上讲，RADIAL TECHNOLOGY(径向技术)是一种基于独特单元盆架设计的冷却技术，可承受更大的功率处理且及更高的可靠性。 虽然传统的扬声器也具有类似的特性，但是与Radial Technology提供的冷却器操作相比，由于音圈的过度加热，普通驱动单元的性能会在工作的短时间后迅速恶化。

在相同的输出工作功率下，径向扬声器将以传统扬声器的一半温度运行。 因此，当驱动单元的部件开始发热时，Volt Radial单元的功率仍能保持稳定输出，并且将比同时启动会话的传统扬声器运行大两倍。 Volt独家研发并获得专利的径向技术，可实现绝佳的冷却，从而实现最小的功率压缩和最大的可靠性。

径向技术这种真正意义上的冷却系统提高了低频响应，重新定义了可靠性和性能，即通过保持扬声器和外壳之间的正确关系来改善低音响应。同时它还使得低频在较高功率水平下，低频的上段部分可以达到较高的功率输出，同时又有非常高的清晰度和极低的染色，这样整个音响系统就达到了平衡。 无论是为了满足演播室环境的需求，还是为了音乐厅或超级俱乐部对质量和功率的需求，在空间，硬件，安装和维修方面的节省使得Volt的Radials驱动单元成为一项回报较高的投资。

除了Volt目前的产品系列和为一系列知名品牌制造的OEM产品外，Volt还赢得了创意扬声器设计解决方案的声誉。 而且，Volt还承担了一系列设计项目，这些项目涵盖了BBC最初制造的驱动单元的设计，这一切都是源自Volt拥有应对任何设计挑战的专业技能和经验。