Bi-directional ribbon microphone provides premier, symmetrical audio with off-axis rejection. Features increased durability and a dual-sided transformer that minimizes signal loss while stopping RF interference. PRODUCT DETAILS with Roswellite® Ribbon Technology The KSM353/ED is a premium bi-directional ribbon microphone crafted for pristine audio in studio and concert hall applications. Proprietary Roswellite® technology provides revolutionary ribbon resilience and durability under extreme conditions. Assembled from state-of-the art transducers, transformers, and metals as the pinnacle of Shure quality for prestigious vocal and acoustic performances. The high-tensile strength, toughness, and shape memory of Roswellite® ribbon material replaces traditional foil ribbons for superior resilience at extreme SPLs. With unique technology and application features, alongside superior materials and construction, Shure KSM Ribbon Microphones are the necessary choice for the world’s most accomplished studio and live performances. Bi-directional polar pattern delivers premier, completely symmetrical audio with superior off-axis rejection Revolutionary Roswellite® proprietary ribbon material replaces traditional foil ribbons with high-tensile strength, toughness, and shape memory that provides superior resilience at extreme SPLs Patented custom ribbon motor assembly tailors bass response without attenuating the overall output for full low and mid ranges, and superior upper range presence from a rising frequency response Double-shielded matched full-sized transformer minimizes signal loss and maximizes output while reducing magnetic and RF interference from 90-degree placement, offset relative to the ribbon 146 dB SPL across 30 – 15,000 Hz frequency response ideal for capturing fast transients in vocals, acoustic instruments, and concert halls Legendary Shure quality and superior construction from hand-assembly of machined steel, silver, gold, and aluminum materials, and housed in a pure stainless steel casing ShureLock® wire rope shock mount for secure thread-locked mounting with maximum isolation Locking aluminum flight case for storage when not in use General Description The KSM353 is a premium bidirectional ribbon microphone crafted for pristine audio in studio and concert hall applications. It is hand-assembled from state-of-the art transducers, transformers and metals as the pinnacle of Shure quality for prestigious vocal and acoustic performances. Proprietary Roswellite® ribbon technology provides revolutionary ribbon resilience and durability under extreme conditions. The Roswellite ribbon material replaces traditional foil ribbons with high tensile strength, toughness, and shape memory that provides superior resilience at extreme sound pressure levels (SPLs). Features Legendary Shure quality and superior construction from hand-assembly of machined steel, silver, gold and aluminum components Revolutionary Roswellite ribbon material replaces traditional foil ribbons with high tensile strength, toughness and shape-memory that provides superior resilience at extreme SPLs Patented, custom ribbon motor assembly provides full low and mid ranges with superior upper presence from a rising response 30 – 15,000 Hz frequency response ideal for capturing fast transients in vocals, acoustic instruments and concert halls Uniform bidirectional polar pattern throughout the frequency range Custom-wound, double-shielded, full-size transformer minimizes signal loss and maximizes output while reducing RF interference, positioned perpendicular to ribbon for best magnetic flux rejection Military-grade, wire rope suspension mount surpasses traditional rubber and elastic cord mounts in resilience and shock absorption Performance Characteristics Ribbon microphones perform optimally with the least amount of loading on the ribbon element as practical. The higher the impedance input on the microphone, the better the low-end and mid-range frequencies are represented in the output signal. Shure recommends using preamps with impedance settings of 1000 Ohms or more, although different load impedances may be used for a desired sound quality. This is a low-noise microphone. The combination of its efficient transducer, robust shielding, and custom transformer produces a low noise floor and output level equal to moving coil microphones. Shure ribbon microphones have an exceptionally smooth, natural response and perform best with preamps that provide simple, transparent gain. However, Shure encourages experimentation to find the desired combination of color and transparency. Applications The KSM353 is a premium microphone, capturing superior audio quality in a wide range of environments. The following are some suggested applications: Studio vocals Orchestra ensembles Acoustic instruments Ambient or room pickup Voice-over for film or broadcast Stereo Techniques Blumlein: Use a pair of KSM353 microphones for natural stereo representation. Excellent for grand piano, orchestras, or large ensembles. Mid-side (M-S): Use a KSM353 with a cardioid microphone, such as the KSM137 or KSM32, to produce a variable-controlled stereo image without moving the microphone. Positioning Position the front of the microphone, with the "SHURE" logo, towards the desired sound source. Position the sides, the null points of a bidirectional microphone, towards any unwanted sound sources. Note: When addressing the back side of a bidirectional microphone, please remember to invert the signal polarity. Shure’s A15PRS accessory is an in-line, balanced, polarity-reversing switch capable of this operation and is available online at: store.shure.com Mounting the Microphone The supplied suspension mount is designed with military-grade, wire rope technology, providing superior resilience and shock absorption. Thread the mount onto a floor or boom stand and insert the microphone. For discreet placement or when space is limited, use a hard stand mount. Visit www.shure.com for more information. Suspension Mount (furnished) Stand Mount (optional accessory) Proximity Effect Directional microphones progressively boost bass frequencies as the microphone is placed in closer proximity to the source. This phenomenon, known as proximity effect, can be used to create a warmer, more powerful sound. Care and Handling To protect your microphone, keep a few simple precautions in mind to ensure long-term performance: Store your microphone in its protective case when it is not in use. Maintain a reasonable distance from fluorescent lights, power transformers, and other strong electromagnetic sources to avoid hum. Use a secure mount and stand and a quality balanced, shielded XLR connecting cable. For additional mounting accessories, visit our website: www.shure.com Phantom power is not necessary and should not be supplied when connecting or disconnecting the microphone. However, properly supplied phantom power will not harm the microphone. Specifications Transducer Type Roswellite® Ribbon Polar Pattern Bidirectional Frequency Response 30 to 15,000 Hz Output Impedance 330 Ω Sensitivity open circuit voltage, @ 1 kHz, typical -53.5 dBV/Pa[1] (2.11 mV) Maximum SPL 146 dB SPL Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 Housing Machined stainless steel Weight Microphone: 633 g (1.4 lbs) with shockmount: 950 g (2.1 lbs) Accessories Furnished Accessories Carrying Case AK353C ShureLock® Wire Rope Shock Mount. Works with KSM353/ED. A300SM Protective Velveteen Pouch. Works with KSM353/ED. A353VB Shure "Circle S" Polishing Cloth A300PC Optional Accessories Elastic suspension shock mount. Works with all KSM313 versions A313SM Switchable Polarity Reverser A15PRS Popper Stopper® Pop Filter with Metal Gooseneck and Microphone Stand Clamp PS-6 25 foot (7.5m) Triple-Flex® Microphone XLR Cable with Switchcraft connectors C25E
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