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CharterOak SA538 Multi-Pattern Tube Microphone  From CharterOak

Impeccably clear while possessing a pleasing musicality and depth, the multi-pattern SA538 produces world-class results on vocals and truly any instrument you throw in front of it! The standard SA538 boasts a slightly fuller midrange than the “B” version, which offers a more “open” sound.



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What We Think

CharterOak has built their reputation on a solid foundation of unique mics that take classic engineering elements and adds innovations that improve upon what is considered the standards. The SA538 is a modern 251 style mic with its own voice. Big, open, warm and detailed are descriptive terms that come to mind when I think about the way this mic sounds. When I use it on vocals I often get an interesting reaction from the performer because they've never heard themselves recorded with a mic that has such an incredible 3-D depth and warmth. All without a perceivable sacrifice to detail and clarity. This makes the SA538 a true oddity and one that every studio from budget to pro should have in their locker.

Often used as a go-to vocal mic here at Sound Pure studios, but it's important to note that this mic is far from a one trick pony. It excels on Acoustic guitar, piano and is like magic as a drum overhead. The build quality, versatility, engineering integrity and stunning musicality make this an easy contender for "best in class". Not to mention the lifetime warranty that all CharterOak products carry!

Vocal Mic Shootout: Lauten Oceanus, Miktek CV4, CharterOak SA538, Peluso VTB

This blind Tube Large Diaphragm Condenser Microphone shootout on Male Vocals features 4 great tube mics: the Peluso VTB, Miktek Cv4, CharterOak SA538, and the Lauten Oceanus. All four mics were run through our Vintech 573 Preamp Modules and Apogee Symphony Converter. First we'll hear the mics completely dry, and then each mic within a mix. If you would like the results of the shootout or all four full length hi-res audio files to compare for yourself, shoot us an email to mics(at)soundpure.com at anytime. Additionally all of these microphones are eligible for our free Try-Before-You-Buy demo program, so if you like what you hear and would like to experience one of these mics for yourself, give us a call at anytime for more information.    Huge thanks to our performers George and Danny of Jack the Radio.  Make sure to check them out at www.JacktheRadio.com!   If you have any questions about the four mics used, the shootout setup, or recording gear in general - we're here to help. Thanks for watching! 919-682-5552 or toll free 888-528-9703.

Manufacturer's Description from CharterOak

The CharterOak SA538 is an affordable, high quality alternative to other condenser microphones in its class. Its sonic integrity, extreme durability, overall design simplicity, and serviceability make it an attractive option to any of the condenser microphones of its type currently available. The CharterOak SA538 is a dual diaphragm vacuum tube condenser microphone. Nine (9) pick up patterns are switchable. It is delivered in a locking flight case, power supply, shock mount, and appropriate cables. The high standard of quality and affordability of the CharterOak SA538 have been achieved through an extended period of research and development, including beta testing by a wide variety of end users.

The parts of the CharterOak SA538 are machined from solid brass and high quality electronic components are used throughout.

The process of creating a CharterOak SA538 Condenser Microphone is started by hand under the strict supervision of CharterOak personnel. Under that supervision the parts are quality checked and assembled at our facility in Connecticut.

The microphones are finished and the parts are quality checked a second time by experienced engineers. The process involves a seven (7) day burn in of the vacuum tube and no less than 1/2 hour spent with each microphone in a studio environment. Careful listening tests employ high quality microphone preamplifiers and high resolution monitoring systems. Quality checks on every component of each kit complete the process.

It is only after this exhaustive finishing and quality control process is complete, that an SA538 will be cleared for sale to the customer.

From the research and development to the delivery of every SA538, it is this attention to detail that makes the SA538 truly unique in its class.

The microphone is delivered with a lifetime warrantee on all parts and labor and easy access to factory technical support. Don't forget to ask for the mics in FREE matched pairs!


About Manufacturer

CharterOak Acoustic Devices is quickly becoming an industry leader for professional quality recording products for today's musicians and audio engineers. Developed in 2002, CharterOak has independent offices in the US, Canada and the UK and is headquartered in the cozy suburbs of Connecticut. CharterOak was founded by producer/engineer, Michael Deming (Lily's, Pernice Brothers, Mike Ireland) from the need to obtain more control with his studio recordings. Our goal is not to emulate the classics of yesterday but to create the classics of tomorrow. Each CharterOak product is assembled & inspected by hand and tested in the studio before they ship to the customer. Sonic integrity, extreme durability, design simplicity, and serviceability are fundamental values upon which all CharterOak products are built. While our product line continues to grow and receive praise, CharterOak will continue to provide hi quality affordable recording device solutions.


*Acoustical Operating Principle: Pressure Gradient

*Diaphragm: Dual 1.07" 6 micron thick gold sputtered Mylar

*Frequency Response: 30Hz-20kHz

*Sensitivity: 12mV/Pa 0dB=1V/Pa@1kHz

*Polar Pattern: Cardioid, Omni, Figure-8, and intermediate stages selectable from power supply

*Impedance: < 200 Ohms

*Recommended Load: > 200 Ohms

Equivalent Input Noise:22dB A weighted IEC651

Maximum Sound Pressure Level: 128dB for 0.5% total harmonic distortion @ 1kHz

Power Requirements: Custom supply 115V or 230V operation with IEC type 2 AC Cable

Connection between Mic & Power Supply: 7 pin XLR