I purchased the KSM 9 Direct from Shure two weeks ago. This mic is brand new in the case. I changed my mind and Shure offers no returns. 

Microphone Type

• Handheld electret condenser

Polar Patterns

• Switchable Cardioid / Supercardioid

Frequency Response

• 50 Hz – 20 kHz

Diaphragm

• Dual ¾-inch gold-layered, low-mass Mylar diaphragms

Sensitivity

• –51 dBV/Pa (2.8 mV)

Maximum SPL

• 152 dB SPL

Self Noise

• 22 dB SPL-A

Signal-to-Noise Ratio

• 72 dB

Dynamic Range

• 130 dB

Output Impedance

• 150 Ω

Power Requirements

• 11–52 V DC phantom power
• Performs best with 48V phantom power

Connector

• 3-pin XLR male

Weight

• 300 g (10.6 oz.)

Construction

• Durable aluminum body
•  
• Three-layer integrated pop filter
• Gold-plated internal and external connectors 

Key Features

• Studio-quality handheld condenser microphone
• Class-A transformerless preamp
• Dual-diaphragm design minimizes proximity effect
• Very high gain before feedback
• Exceptional vocal clarity and detail
• Excellent rejection of handling noise
• Includes zippered carrying case and microphone clip 
• Dual gold-layered diaphragms
• Switchable cardioid and supercardioid pickup patterns
• Class-A transformerless preamp
• Excellent rejection of handling noise
• Reduced proximity effect compared to many handheld condensers
• Studio-quality detail in a stage microphone 

Sound

The KSM9 has:

• Smooth, polished highs
• Excellent articulation
• A slightly warm low end
• Very natural vocal reproduction
• Plenty of "air" without sounding harsh

It flatters singers who have:

• Clean vocal technique
• Good mic control
• Softer or more detailed voices