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发表于 2020-5-21
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Avalon M5纯甲类话筒前置放大器是当今可见的最音乐的低噪音全功能前置放大器。M5设计用来优化信号的完整性及音乐性，它以简洁的设计将先进的变压器输入与高性能甲类级联FET和双极性分立元件放大器相结合，以获得无可匹敌的声学特性。M5最适合歌唱、原声乐器、吉他以及键盘等使用。
功能特性：
l 其特征为艺术、平衡的100%分立元件、纯甲类信号放大器，实用的用户特征以及橡胶涂层的硬件设计，长久地传递高性能的音效。
l 最短信号通路设计
l Avalon的先进的纯对称设计提供了高电压、大净空、扩展的频率带宽以及极低的噪音。100%分立元件、纯甲类信号放大器的使用为要求苛刻的音乐专业人士提供了无限的声学特性以及自然和谐的细节，提升了音乐材料，与音乐自身浑然一体。
l 平滑的音乐细节及靓丽的声学品质
l 最短音频信号通路
l 纯甲类,100%分立元件设计
l 高性能输入变压器
l 话筒输入以及Hi- Z输入,达+36分贝
l 高净空+30分贝
l 增益以2分贝的步幅调整,可达+64分贝
l 直耦合,纯甲类输出
l 带照明的专业大计量表
l 双LED峰值信号指示器
l 稳压+48V幻象电源
l 低失真,THD 及IMD低于0.5%
l 可变被动高通滤波器(低切)
l 所有信号通路使用银质继电器
l 100%分立元件的电源用于音频通路
l 外接150瓦环形电源
l 长寿命不锈钢硬件
技术参数：
Circuit Topology:
Twin cascode FET and bipolar low level input signal stages. High-voltage, 100% discrete, symmetrical high-bias Pure Class A amplifiers.
Input Type and Load:
Superior transformer, balanced low-ratio 1500 ohm input load.
Maximum Mic Level:
+36dB balanced XLR pin 2 hot (with -20dB passive attenuator).
Maximum Instrument Level
+30dB balanced 600 ohms, DC coupled, discrete Class A.
Input Attenuator:
-20dB resistive pre transformer primary, sealed silver relay.
Phantom Power:
+48v regulated 50mA capability, sealed silver relay.
High Pass Filter:
Passive, variable from 30Hz to 185Hz @ 6dB per octave, sealed silver relay.
Polarity Reverse:
Sealed silver relay on microphone input.
Gain Range Input:
+20dB to +64dB in 2dB steps.
Maximum Output Level:
+30dB unbalanced 600 ohms, DC coupled, discrete symmetrical Pure Class A.
Output Type:
XLR connector, pin 2 hot (optional balanced JT-1 transformer).
Noise EIN Unweighted:
-126dB 150 ohm.
Noise 20kHz Unweighted:
-100dB
Distortion THD, IMD:
0.05% nominal
Frequency Response -3dB:
1Hz to 120kHz transformer limit.
System Bandwidth:
DC to 1MHz
Output Meter:
High quality, illuminated analog VU meter 0dB = +4dB.
Peak Meter:
Bi-color LED's 0dB and +20dB peak detection circuit.
M5 Dimensions:
8.5 x 3.5 x 12 in (216 x 88 x 305mm) half rack width.
Weight:
15lbs (6.8kg)
Dimensions of Shipping Carton:
24 x 21.5 x 7.5 in (610 x 546 x 190mm)
Weight-Packed:
25lbs (11.4kg) includes B2T power supply and cables.
AC power supply B2T:
External toroidal 100V to 240V, 50-60Hz selectable,
150 watts maximum.
Cables:
1 x 8ft 4 pin ac cable, 1 x 8ft standard IEC cable included.
Dimensions:
5 x 7 x 3.25 in (127 x 177 x 83mm)
Weight:
7lbs (3.2kg)
Rack mount kit (1) RM-1:
Single M5 19 inch rack mount kit (holds one half rack unit).
Rack mount kit (2) RM-2:
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