Shure SM87A 為專業舞台同錄音室而設，具備超心型指向性收音模式，有效隔絕環境雜音，集中收錄人聲細節，無論係現場演出、演講、還是錄音室工作，SM87A 都是可靠之選。
特色
- 高度定向的超心型拾音模式
- 控制低頻衰減
- 極低的射頻和磁噪音敏感度
- 對變化載荷阻抗的影響極小
- 內建防風和防爆濾網
- 傳感器元件防震安裝
- 結構堅固，可靠性卓越
- 在廣泛的溫度和濕度條件下可供現場使用
- 支援多種幻象電源，包括DIN 45 596標準的11V和52V直流電源
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本購買包括：
- Shure SM87A microphone
- stand adapter
- zippered pouch
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Techncial Specs
- Type: Condenser
- Frequency Response: 50 to 20,000 Hz
- Polar Pattern: Supercardioid
- Sensitivity (at 1,000 Hz):
Open circuit voltage: –52.5 dBV/Pa (2.4 mV) (1 Pa = 94 dB SPL) - Impedance:
Rated at 150 Ω (100 Ω actual ±20%)
Recommended minimum load impedance: 800 Ω - Output Clipping Level:
1000 Ω Load at 1,000 Hz: –6 dBV (0.5 V) - Maximum SPL (at 1,000 Hz):
140.5 dB (0.25% THD, 1000 Ω load) - Self-Noise:
24 dB typical, A-weighted
26 dB typical, weighted per DIN 45 405 - Dynamic Range (1000 Ω):
116.5 dB (maximum SPL to A-weighted noise level) - Signal-to-Noise Ratio:
70 dB at 94 dB SPL (IEC 651)
S/N ratio is difference between 94 dB SPL and equivalent SPL of self-noise A-weighted - Polarity:
Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 - Power Requirements:
11 to 52 vdc, 1.2 mA - Case:
Aluminum construction with steel grille and satin black finish - Connector:
Three-pin professional audio connector (male XLR type) - Weight:
200 g - Dimensions:
192 mm L x 50 mm W
