详细介绍：
KSM44/SL 是一款具有多种模式（心形、全向、双向）的外偏置大型双振膜电容话筒，具有极低的自身噪声 (7dB)。专门用于满足需要在录音棚录音的音乐人的各种需求，KSM44 温和而饱满的声音具有出色的性能，是一款专为在高质量录音时逼真再现原音而精心打造的产品。KSM44 在各种录音应用中同样具有极大的灵活性，由于它能调整声压级来适应大音量音源（如鼓和吉他扩音器），因此非常适合用于普通乐器或扩音乐器。
性能特性
超宽的频率响应
极低的自身噪声
出色的低频重现
高输出电平
高输入声压级能力
无交叉失真
极为均衡的极性响应
优异的共模抑制和射频干扰抑制
应用
KSM44/SL 是一款专为录音棚录音而设计的高质量人声话筒。但是，话筒的使用会因个人品味不同而异。以下大致地列出了一些普通应用：
声音 -- 独唱、背景音乐、画外音
声学乐器 - 如钢琴、吉他、鼓、打击乐器、弦乐器
管乐器 - 铜管乐器和木管乐器
低音乐器 - 如倍低音提琴、电贝司、底鼓
悬挂话筒 - 鼓或打击乐器
乐团 - 合唱团或管弦乐队
室内环境拾音 - 吉他扩音器或鼓
当然，在用话筒收集音源时，声音环境和话筒位置都将极大地影响所收集的声音。我们希望用户调整这些因素以便获得最佳的整体音效。
双层 1 英寸、外偏置、超薄、2.5 微米、24 K 镀金、轻质、聚酯膜(r) 振膜具有超高速瞬态响应
不带变压器的 A 类离散前置放大器，具有音质透明、超高速瞬态响应且无交叉失真的特点；能将谐波失真和互调失真降到最低
全音域频率响应 (20 Hz - 20 KHz)，可以极其准确地再现人声和乐器声
极低的自身噪声 (7 dBA)，可用于高质量的录音棚人声录音
高质量的电子元件和镀金的内部接头和外部接头
次声波滤波器可以消除由机械振动引起的低于 17 Hz 的低频噪声
15 dB 衰减开关，可处理高输入声压级音源
三位置可切换式低频滤波器能真正地降低不需要的背景噪声并抑制邻近效应
经久耐用的锌铸件外壳和经强化的低碳钢网罩可以在意外跌落或使用不当时保护话筒头
均衡的极性响应在进行高质量录音时具有自然逼真的离轴响应
集成的三级"砰砰"声保护网罩可以防止风噪声和呼吸噪声
内部减震架可以降低不需要的拿握噪声和支架噪声
话筒头类型 外部偏压电容
频率响应 20 至 20,000 Hz
查看更大的视图
输出阻抗 150 欧姆（有效）
衰减开关 0 或 15 dB 衰减
低频率响应开关 平滑；-6 dB/倍频程，低于 115 Hz；
-18 dB/倍频程，低于 80 Hz
幻象电源 48 Vdc (IEC-268-15/DIN 45 596)，针脚 2 和 3 为正
耗用电流 48 Vdc 时通常为 5.4 mA
共模抑制 > 50 dB，20 Hz 至 20 kHz
极性 振膜前端的正压会在输出针脚 2 上产生
正电压（相对于针脚 3）
方向拾音模式 心形 全向 双向
灵敏度
（典型，1000 Hz 时；1 Pa = 94 dB 声压级） -31 dBV/Pa -37 dBV/Pa -36 dBV/Pa
自身噪声
（典型，同等声压级；A 权重，IEC 651） 7 dB 10 dB 10 dB
1000 Hz 时的最大声压级
2500 欧姆负载（衰减器打开） 132 (149) dB 138 (151) dB 137 (150) dB
1000 欧姆负载（衰减器打开） 127 (144) dB 132 (145) dB 131 (144) dB
输出限幅电平*
2500 欧姆负载 7 dBV 7 dBV 7 dBV
1000 欧姆负载 1 dBV 1 dBV 1 dBV
动态范围
2500 欧姆负载 125 dB 128 dB 127 dB
1000 欧姆负载 120 dB 122 dB 121 dB
信噪比** 87 dB 84 dB 84 dB
尺寸和重量 最大机身直径为 55.9 mm（2.20 英寸），长度为 187 mm
（7.37 英寸）；490.5 g（17.30 盎司）。
<20 Hz 至 20 kHz；总谐波失真 < 1%。在指定的声压级下，输入信号等于话筒头输出时话筒前置放大器的总谐波失真。
· 信噪比是 94 dB 声压级和自身噪声 A 权重同等声压级之间的差额。
The KSM44/SL is a multiple pattern (cardioid, omnidirectional, bidirectional), externally biased, dual large diaphragm condenser microphone with extremely low self-noise (7dB). Developed to meet the needs of studio recording musicians, the warm, rich sound of the KSM44 delivers exceptional performance, tailored to deliver vivid reproduction of voice for the most critical recordings.
The KSM44 also offers great flexibility in a variety of recording applications, working well on acoustic and amplified instruments, as its capacity for managing high SPLs accommodates loud sound sources such as drums and guitar amplifiers.
Features
Dual 1 in., externally biased, ultra-thin, 2.5 micron, 24-karat gold-layered, low mass, Mylar? diaphragms provide superior transient response
Class A, discrete, transformerless preamplifier for transparency, extremely fast transient response and no crossover distortion. Minimizes harmonic and intermodulation distortions.
Full-range frequency response (20 Hz - 20 KHz) for an extremely accurate reproduction of voice and instruments.
Extremely low self noise (7 dBA) for critical studio vocal recording.
Premium electronic components and gold-plated internal and external connectors.
Subsonic filter eliminates rumble from mechanical vibration below 17 Hz.
15 dB attenuation switch for handling high input SPL sound sources.
3-position switchable low-frequency filter virtually eliminates unwanted background noise and controls proximity effect.
Durable zinc die-cast housing and hardened low carbon steel grille to protect the cartridge from accidental drops or misuse.
Uniform polar response provides natural off-axis response for critical recording.
An integrated 3-stage pop protection grille to guard against wind and breath noise.
An internal shock mount to reduce unwanted handling and stand noise.
Performance Characteristics
Extended frequency response
Very low self-noise
Exceptional low-frequency reproduction
High output level
High input SPL capability
No cross-over distortion
Extremely uniform polar response
Superior common mode rejection and suppression of radio frequency interference
Accessories
Each KSM44/SL comes supplied complete with:
Color-matched ShureLock™ elastic-suspension shock mount
ShureLock™ swivel mount
Protective velveteen pouch
Locking aluminum carrying case
Applications
The KSM44/SL is designed as a premium vocal microphone for studio recording. Microphone use, however, is a matter of personal taste. Here is a non-exhaustive list of common applications:
Vocals: solo, background, voice-over
Acoustic instruments : such as piano, guitar, drums, percussion, strings
Wind instruments: brass and woodwind
Low frequency instruments: such as double bass, electric bass, kick drum
Overhead miking: drums or percussion
Ensembles: choral or orchestral
Room ambiance pick-up: guitar amplifier or drums
Of course, both the acoustic environment and microphone placement have significant effects on the sound obtained when miking any sound source. We encourage users to experiment with these variables to achieve the best overall sound.
Technical Info
Cartridge Type: Externally biased condenser
Frequency Response: 20 to 20,000 Hz
Output Impedance: 150 Ω (actual)
Attenuation Switch: 0 or 15 dB attenuation
Low Frequency Response Switch: Flat; -6 dB/octave below 115 Hz; -18 dB/octave below 80 Hz
Phantom Power: 48 Vdc +/- 4 Vdc (IEC-268-15/DIN 45 596), positive pins 2 and 3
Current Drain: 5.4 mA typical at 48 Vdc
Common Mode Rejection: >/= 50dB, 20 Hz to 20 kHz
Polarity: Positive pressure on front diaphragm produces positive voltage on output pin 2 relative to pin 3
Dimensions and Weight: 55.9 mm (2.20 in.) maximum body diameter, 187 mm (7.37 in.) long; 490.5 g (17.30 oz.)
Directional Polar Patterns: Cardioid/Omnidirectional/Bidirectional
Sensitivity (typical; at 1000 Hz; 1 Pa =94dBSPL): --31 dBV/Pa / --37 dBV/Pa / --36 dBV/Pa
Self-noise (typical, equivalent SPL; A-weighted (IEC 651)): 7 dB/10 dB/10 dB
Maximum SPL* 2500 Ω load (Attenuator on): 132 (149) dB/138 (151) dB/137 (150) dB
1000 Ω load: 127 (144) dB/132 (145) dB/131 (144) dB
Output Clipping Level*
2500 Ω load: 7 dBV/7 dBV/7 dBV
1000 Ω load: 1 dBV/1 dBV/1 dBV
Dynamic Range
2500 Ω load: 125 dB/128 dB/127 dB
1000 Ω load: 120 dB/122 dB/121 dB
Signal to Noise ratio: 87 dB/84 dB/84 Db
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