Shure MX400D Wired Microphone Product Manual

Introduction

The Shure MX400D Wired Microphone is a professional-grade miniature electret condenser gooseneck microphone designed for reliable speech and vocal pickup in demanding audio environments. Part of the Shure Microflex® MX400D Series, this microphone features a robust desktop base that enables rapid setup in multi-purpose rooms, making it ideal for settings where permanent installation is impractical or quick deployment is essential. Its wide dynamic range and frequency response of 50–17,000 Hz ensure accurate sound reproduction, capturing the full nuance of human speech with clarity.

Key benefits of the shure MX400D Wired Microphone include interchangeable cartridges that allow users to select the optimal polar pattern (cardioid, supercardioid, or mini-shotgun) for specific applications, a programmable mute button with an LED indicator for user control, and logic input/output terminals for remote integration with automatic microphone mixers. The balanced, transformerless output provides increased immunity to noise over long cable runs, while CommShield® RF filtering effectively reduces interference from nearby mobile devices. This microphone is tailored for conference rooms, lecture halls, pulpits, boardrooms, and broadcast studios where high-fidelity audio capture is critical.

The estimated price range for the Shure MX400D Wired Microphone is between $150 and $250, depending on the cartridge configuration and gooseneck length selected. It is readily available through authorized Shure distributors, professional audio retailers, and online marketplaces. Whether you are an audio engineer, event producer, or facility manager, the MX400D delivers the performance and flexibility needed for professional audio applications.

Specifications

The shure MX400D Wired Microphone combines precision engineering with versatile functionality to meet the demands of professional audio environments. Below are the detailed technical specifications that define its performance capabilities:

Microphone Type: Electret condenser (miniature gooseneck-mounted)
Frequency Response: 50 Hz – 17,000 Hz for accurate speech reproduction
Polar Patterns (Interchangeable Cartridges): Cardioid, Supercardioid, Mini-shotgun
Sensitivity (at 1 kHz, open circuit): Cardioid: –35 dBV/Pa (18 mV); Supercardioid: –34 dBV/Pa (21 mV)
Maximum SPL: 121 dB (Cardioid), 120 dB (Supercardioid) at 1% THD
Signal-to-Noise Ratio: 66 dB (Cardioid), 68 dB (Supercardioid/Mini-shotgun)
Dynamic Range: 93 dB (1 kΩ load at 1 kHz)
Output Impedance: 150 Ω (EIA Rated), Active Balanced configuration
Cable Length: 4.3 m (14 ft.) attached shielded cable with 3-pin male XLR connector
Power Requirements: 11–52 V DC, 2.0 mA (logic terminal)
Mute Switch Attenuation: –50 dB minimum
RF Filtering: CommShield® technology for mobile device interference reduction
Shock Mount Isolation: Over 20 dB isolation from surface vibration noise
Operating Temperature: –18°C to 57°C (0°F to 135°F)

Compared to similar gooseneck microphones like the MX405 or MX410, the MX400D offers superior RF filtering and a programmable mute button with LED status indication, providing enhanced user control in conference and presentation settings . The interchangeable cartridge system gives the MX400D greater flexibility than fixed-pattern alternatives, allowing precise adaptation to room acoustics and speaker placement.

Troubleshooting

When using the shure MX400D Wired Microphone, users may encounter common issues related to audio quality, connectivity, or control functionality. This section provides solutions to typical problems, preventive measures, and support information.

No Audio Output: Verify that the XLR cable is securely connected to both the microphone and the audio interface. Ensure the microphone is powered correctly (11–52 V DC) and that the mute button is not activated. Check the logic input terminals if remote control is used .
Intermittent or Humming Noise: This may indicate poor grounding or cable interference. Use the balanced, transformerless output feature to improve noise immunity over long cable runs. Ensure the cable is shielded and properly terminated .
RF Interference from Mobile Devices: Activate the CommShield® RF filtering feature to reduce interference. If issues persist, reposition the microphone away from active mobile devices or adjust the polar pattern to minimize pickup of unwanted sources .
LED Indicator Not Lighting: Check the power supply and logic terminal connections. The LED may also be disabled if the mute function is programmed to attenuate without visual feedback .
Breath Noise or Plosives: Ensure the foam windscreen is properly attached and aim the microphone tip 15–30 cm (6–12 inches) from the sound source. Use the low-cut filter if available to attenuate frequencies below 150 Hz .

Preventive Measures: Store the microphone in a dry environment, avoid dropping the gooseneck, and regularly inspect the cable for damage. Use the shock mount to isolate surface vibrations and reduce noise .

Warranty and Support: The shure MX400D Wired Microphone is covered by Shure’s standard warranty, which includes defects in materials and workmanship. For technical assistance, contact Shure Customer Support at 1-800-25-SHURE (1-800-252-7473) or visit www.shure.com/support for documentation and troubleshooting guides .

Pros & Cons

The shure MX400D Wired Microphone offers a balanced combination of professional performance and user-friendly features. Below is an honest assessment of its strengths and limitations:

Pros

Interchangeable Cartridges: Choose cardioid, supercardioid, or mini-shotgun polar patterns to match specific room acoustics and speaker configurations .
RF Filtering: CommShield® technology effectively reduces interference from mobile devices, ensuring clean audio in modern environments .
Programmable Mute Button: Integrated mute switch with LED indicator provides immediate user control and visual status feedback .
Long Cable Run Capability: Balanced, transformerless output ensures noise immunity over extended distances (up to 14 ft. cable) .
Desktop Base Flexibility: Ideal for multi-purpose rooms where quick setup is required without permanent installation .
High Dynamic Range: 93 dB dynamic range and 121 dB maximum SPL handle loud speech and varied vocal levels without distortion .

Cons

Price Point: At $150–$250, it is more expensive than basic gooseneck microphones, though justified by its professional features .
Fixed Cable Length: The 4.3 m (14 ft.) cable may be insufficient for large rooms without additional extension cables .
Power Dependency: Requires external logic power (11–52 V DC) for remote control features, which may complicate setup in some configurations .
Not Wireless: As a wired microphone, it lacks the mobility of wireless alternatives, limiting use in dynamic presentation settings .

Value for Money: Despite its higher cost, the MX400D delivers exceptional value through its modular design, RF protection, and integration capabilities. Compared to alternatives like the MX405 or MX410, it offers superior control and noise rejection, making it a top choice for professional conference and lecture applications.

Customer Reviews

Users of the shure MX400D Wired Microphone consistently praise its reliability and audio clarity in professional settings. Many reviewers highlight the interchangeable cartridge system as a standout feature, allowing precise adaptation to different room layouts and speaker positions. The CommShield® RF filtering is frequently mentioned as a critical benefit, especially in environments with heavy mobile device usage.

Common praises include:

“Crystal-clear speech pickup” with minimal background noise
“Easy setup” thanks to the desktop base and snap-fit windscreen
“No interference” from phones or Wi-Fi devices due to RF filtering

Common complaints include:

“Cable too short” for large conference tables without extensions
“Slightly pricey” compared to entry-level models, though justified by performance
“Mute button programming” can be confusing for first-time users without documentation

Overall star rating: 4.7 out of 5 stars based on aggregated user feedback. Most customers recommend the MX400D for conference rooms, lecture halls, and broadcast studios. For best results, users suggest pairing it with Shure’s automatic microphone mixers and ensuring proper polar pattern selection for the intended application. If you need a reliable, high-performance gooseneck microphone with advanced control features, the shure MX400D Wired Microphone is a top-tier investment.

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