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Josephson C715 LDC Matched Pair - Used  From Josephson

Sequential serial, factory matched Pair of two of the worlds best LDC FET mics


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Josephson Engineering

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What We Think

The C715 is one of few solid state LDCs you’ll ever find me putting in front of a vocalist. With that exception, I’m more likely to be putting up some variety of tube large diaphragm mic.  What’s so special about the 715?

It has the forwardness and immediacy of a FET mic. It’s very clear, detailed and honest, but without feeling naked and exposed. It’s beefy on the bottom with a soft, slightly dark top end to it. If you’re familiar with the Sony C-37 in any of its iterations, think of that as a starting point. The C715 is not meant to be a clone, but it does use a very similar capsule and will be loved in many of the same applications that C-37s are used in. The Josephson is a much more stable, reliable mic than the C-37 (which often spend more time on the work bench than on mic stands). With a surprisingly low output for a condenser this mic will allow you to push your preamp harder to get more color out of it, but it’s a very low noise mic so you don’t need to worry about bringing up the noise floor.

This is an absolutely incredible vocal mic, and it would be at home in many other applications as well. Give us a call and let’s talk about whether it’s the right mic for you.

Manufacturer's Description from Josephson

Series Seven microphones provide unprecedented flexibility in studio pickups with a variety of directional patterns. The C715 uses a unique single large diaphragm capsule with an adjustable vent allowing cardioid or omni operation, and includes a new, patent-pending metal foam housing for minimum acoustic coloration due to the elimination of many internal reflecting surfaces.

The C715 features the new single-sided capsule with a 5 micron evaporated gold diaphragm. The backplate has an adjustable vent, reached through an opening in the back of the grille, that allows the mic to be adjusted from cardioid to omni. The single diaphragm capsule has a particularly smooth sound, usable for many studio applications where some conventional dual diaphragm mics are too harsh or bright.

The internal circuitry uses a class-A cascode FET front end, driving a large nickel core Lundahl output transformer for compatibilty with a wide range of preamps and consoles. The internal high voltage linear supply generates capsule polarization voltage without using a switching oscillator, for very low noise.

The capsule assembly in the C715 is internally shock mounted so that the mic may be attached directly to a stand through its rugged yoke mount, without using any external accessories.

Josephson Engineering

About Manufacturer

Josephson Engineering makes a wide range of fine condenser microphones for studio, stage and field sound pickup, and audio instrumentation. The company began in San Jose, California in 1988 and moved to Santa Cruz in 2000. This is our 20th year of producing microphones. In the process of developing our own mics, we've come up with special technologies that let us realize designs that weren't possible in classic mics of years past. This means that the expert user has a wider range of sound choices, without many of the compromises of older designs. Besides our own production, we also supply microphone capsules to several other mic manufacturers that become the mics for their most demanding customers. All of our business is individual -- we use select local dealers who bring our product directly to critical users around the world. We have a standard product line that covers many applications, but if there's a microphone you need that we don't make, we'll either tell you about the best one we know of for that job, or make it for you ourselves. We won't tell you that one of our mics is good for everything -- there's no such thing. Josephson also provides electro-acoustical engineering, design and manufacturing services for challenging requirements in many industries, specializing in microphone transducers and supporting systems. Our OEM capabilities have allowed several companies to excel in their own markets, using capsules made by Josephson.


Pressure-gradient condenser microphone transducer

Variable cardioid/omni directional pattern

Frequency range: 20-20,000 Hz

Sensitivity: -55 dB ref 1V/Pa (1.8 mV/Pa)

Equivalent noise level: <19 dB SPL, A weighted rms

Overload sound level: 140 dB SPL

Power supply: P48 phantom, 2 mA

Diameter: 63 mm (100 mm wide at yoke), length 261 mm

Weight: 1.2 kg

Output connector: 3-pin XLR

Made in USA