This one already has the right basic direction, but I would make it more specific and less promotional. For the KSM137/SL, the strongest search/buyer terms are cardioid condenser microphone, instrument microphone, acoustic guitar, piano, percussion, drum overheads, high SPL, and low self-noise.

I would also explain the pad and low-frequency filter because those are meaningful reasons someone would choose the KSM137.

Shure KSM137/SL Cardioid Condenser Instrument Microphone

The Shure KSM137/SL is a professional cardioid condenser microphone designed for detailed reproduction of acoustic instruments, percussion, piano, strings, drum overheads, brass, woodwinds, and other demanding studio and live sound applications.

With a wide 20 Hz–20 kHz frequency response, low self-noise, fast transient response, and the ability to handle very high sound pressure levels, the KSM137 is equally suited to capturing the detail of acoustic instruments and the powerful transients of drums and percussion.

A three-position attenuation pad and switchable low-frequency filtering provide additional control when positioning the microphone close to loud instruments or when reducing unwanted low-frequency noise and proximity effect.

Cardioid Pickup for Focused Instrument Miking

The KSM137 uses a cardioid polar pattern to capture sound primarily from the front of the microphone while reducing pickup from the sides and rear.

This makes it useful for both studio recording and live sound, where isolation from nearby instruments, monitors, room reflections, and other sound sources can be important.

Its end-address design also makes the microphone easy to position around acoustic instruments, drums, piano, and other sources where precise microphone placement is required.

Detailed Response for Acoustic Instruments

The KSM137 is designed to reproduce the natural character and transient detail of acoustic sound sources without excessive coloration.

Its 20 Hz–20 kHz frequency response makes it suitable for a broad range of instruments, including:

• Acoustic guitar
• Piano
• Strings
• Drum overheads
• Cymbals
• Percussion
• Brass
• Woodwinds
• Ensembles
• Room microphone applications

The microphone's transient response is especially useful when capturing sources with fast attacks, such as percussion, cymbals, and plucked string instruments.

Handles High Sound Pressure Levels

The Shure KSM137 isn't limited to quieter acoustic instruments. Its high SPL capability allows it to be positioned near loud sound sources without overloading the microphone.

A built-in three-position attenuation switch provides 0 dB, -15 dB, and -25 dB settings.

Engaging the pad increases the microphone's ability to accommodate high sound pressure levels, making the KSM137 suitable for drums, percussion, brass, amplified instruments, and other high-output sources.

Switchable Low-Frequency Filter

A built-in low-frequency filter provides additional control over unwanted bass frequencies.

This can be useful for reducing:

• Stage and floor vibration
• Mechanical rumble
• HVAC noise
• Excessive proximity effect
• Unwanted low-frequency buildup

The filter allows the microphone to be adapted to different instruments, placements, and recording environments without requiring additional processing before the signal reaches the mixer or audio interface.

Low Self-Noise for Studio Recording

With a rated self-noise of 14 dB SPL A-weighted, the KSM137 is suitable for recording detailed acoustic sources where microphone noise can become noticeable.

This combination of low self-noise and high SPL capability gives the microphone a wide usable operating range—from quieter acoustic instruments to loud percussion and brass.

Shure KSM137/SL Key Features

• Professional cardioid condenser instrument microphone
• End-address microphone design
• 20 Hz–20 kHz frequency response
• Detailed transient response
• Suitable for studio recording and live sound
• High SPL capability for loud instruments
• Three-position attenuation pad
• 0 dB, -15 dB and -25 dB pad settings
• Switchable low-frequency filtering
• 14 dB SPL A-weighted self-noise
• Cardioid pattern helps reduce unwanted off-axis sound
• XLR connection
• Phantom-powered operation
• Durable aluminum construction
• Satin nickel finish
• Includes microphone clip, windscreen and carrying case

Shure KSM137/SL Specifications

Ideal Applications

The Shure KSM137/SL is especially well suited for:

• Acoustic guitar
• Piano
• Strings
• Drum overheads
• Cymbals
• Percussion
• Brass instruments
• Woodwinds
• Ensembles
• Room and ambient miking
• Studio recording
• Live sound reinforcement

Why Choose the Shure KSM137/SL?

The KSM137 is a versatile choice when you need a small-diaphragm cardioid condenser microphone capable of handling both detailed acoustic instruments and high-SPL sources.

Its combination of low self-noise, wide frequency response, selectable attenuation, and low-frequency filtering allows the same microphone to move from acoustic guitar or strings to drum overheads, percussion, piano, and brass without requiring a different microphone for every application.

What's Included

The Shure KSM137/SL includes:

• Shure KSM137 microphone
• Microphone clip
• Windscreen
• Carrying case

Why Buy the Shure KSM137/SL from Audio Supply?

Audio Supply is an authorized Shure dealer, providing genuine Shure microphones, wireless systems, microphone accessories, stands, cables, windscreens, and professional audio equipment.

If you're selecting microphones for recording, live sound, drum overheads, piano, acoustic instruments, or a larger microphone package, our team can help you choose compatible Shure microphones and accessories for your application.