Using the Directional Qualities of the SM89

Polar Pattern

Hypercardioid at low frequencies, lobar at frequencies above 1 kHz, symmetrical about axis.

150°	180°	150°		150°	180°	150°
150°		150°		150°		150°
120°		120°	120°			120°
90°		90°	90°			90°
	–20 dB				–20 dB
	–15 dB				–15 dB
60°	–10 dB	60°	60°		–10 dB	60°
	–10 dB				–10 dB
	–5 dB				–5 dB
30°	0	30°		30°	0	30°
	0				0
		250 Hz				2500 Hz
		500 Hz				6300 Hz
		1000 Hz				10000 Hz

TYPICAL POLAR PATTERNS

Curves shown at 1.8m (6 ft)

Output Impedance

Rated at 150 Ω (100 Ω actual)

Recommended minimum load: 800 Ω (May be used with loads low as 150 Ω with reduced clipping level)

Sensitivity: (at 1,000 Hz)

Open Circuit Voltage . . . . . . . . –33 dBV/Pa (22.2 mV) 1 Pascal = 94 dB SPL

Dimensions

524 mm (20-5/8 IN.)

386 mm (15-3/16 IN.)

20 mm (25/32 IN.) DIA

OVERALL DIMENSIONS

Environmental Conditions

Operating Temperature: –29 to 57° C (–20 to 135°F)

Relative Humidity (Operating): 0 to 95%

Storage Temperature: –29 to 74° C (– 20 to 165°F)

Relative Humidity (Storage): Up to 80% at 74° C (165° F)

Net Weight

195 grams (6.9 oz)

POWERING THE SM89

The SM89 is designed for connection to widely available 11 to 52 Vdc phantom-powered microphone inputs. Suitable inputs are found in such Shure units as Mixer Models M267, M268, FP31, FP32, and FP42, Distribution Amp Model FP16, and Power Supply Model PS1A.

Output Clipping Level (at 1,000 Hz, under 0.5% THD)

800 Ω load: –1 dBV (0.89 V)

150 Ω load: –12 dBV (0.25 V)

Maximum SPL (at 1,000 Hz, under 0.5% THD)

800 Ω load: 127 dB SPL

150 Ω load: 119 dB SPL

CAPACITOR

CARTRIDGE

FET

IMPEDANCE

CONVERTER

		BALANCED
		TRANSFORMER
	LF RESPONSE	CLASS A
	LF RESPONSE	COMPOUND
	FILTER	COMPOUND
	FILTER	AMPLIFIER
		AMPLIFIER
		REGULATOR/
		REVERSE
		VOLTAGE
		PROTECT

BLOCK DIAGRAM

RF1

FILTER

Hum Pickup

Under 3 dB equivalent SPL in 1 mOe field (60 Hz)

Output Noise

16 dB SPL typical, A-weighted

Signal-to-Noise Ratio

79 dB re 94 dB SPL

Dynamic Range

111 dB

Phasing

Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of microphone output connector

Power

Phantom voltage: 11 to 52 Vdc; 2 mA current drain

Low-Cut Filter

Recessed low-cut filter switch, 15 dB/octave cut below

60 Hz(—) or 160 Hz ( )

Case

Satin-black vinyl painted aluminum alloy handle and grille with stainless steel screen

USING THE DIRECTIONAL QUALITIES OF THE SM89

Because of its minimum comb-filter effects, the SM89 has a unique advantage over other shotgun microphones when good sound would otherwise be difficult or impossible to pick up. For instance, in a relatively nonreverberant location, the SM89 can be aimed so that the noise source is entirely off-axis to the microphone even if this puts the desired source up to 30° off-axis. The noise pickup will then be minimal, and the SM89 will pick up the desired source with slightly diminished high-frequency response.

COMPARISON OF 30 ° AND 90 ° OFF-AXIS RESPONSE OF SM89

Curves shown at 1.8m (6 ft)

SM89 specifications

The Shure SM89 is a distinguished condenser microphone that boasts exceptional performance and versatility, making it a preferred choice for both live and studio applications. This microphone is particularly well-suited for capturing vocals and instruments, owing to its precise audio reproduction and advanced design.

One of the standout features of the SM89 is its frequency response. The microphone covers a broad range, typically from 20 Hz to 20 kHz, allowing it to capture deep bass notes as well as crisp, high frequencies. This wide frequency range ensures that users can achieve a natural and balanced sound that retains the nuances of the performance.

The SM89 utilizes a highly directional supercardioid polar pattern, which is instrumental in isolating the sound source while minimizing background noise. This characteristic makes it ideal for use in live environments, where managing ambient noise is crucial. The supercardioid pattern also allows for greater placement flexibility, as the microphone can be positioned closer to the sound source without picking up unwanted noise from other directions.

In terms of technology, the SM89 features a built-in preamp circuit, which enhances its capability to capture audio with clarity and detail. Coupled with a low self-noise level, the microphone guarantees a clean signal, making it a great option for professional recording settings. The microphone's high SPL handling also allows it to capture loud sound sources without distortion, making it suitable for a variety of instruments including brass and percussion.

The SM89 is equipped with a rugged construction that is both durable and reliable. Its all-metal housing provides protection against physical damage, while the internal shock mount design helps reduce handling noise and vibrations. These characteristics are essential for mobile musicians and sound engineers who require gear that can withstand the rigors of travel and live performance.

Another notable aspect of the Shure SM89 is its versatility. It can be used in various applications, including broadcasting, sound reinforcement, and recording, allowing it to adapt to different performance situations seamlessly. Whether it’s in a studio setting or on stage, the SM89 ensures that sound quality remains a top priority.

In conclusion, the Shure SM89 is a remarkable microphone that combines advanced technology with robust design, making it a reliable choice for audio professionals. Its exceptional sound quality, directional capabilities, and durable construction make it an excellent investment for musicians, sound engineers, and content creators alike.