Josephson C725

Dual-diaphragm hybrid condenser microphone.

CAP2: 0 £8,800.00
£7,333.33 ex VAT
Call or Email for availability.

Hybrid large-diaphragm condenser microphone using vacuum tube and solid state circuitries and the dual-diaphragm capsule originally used in the C700 and C716 microphones.

At a glance

  • DC-polarized Pressure/pressure-gradient condenser microphone transducer
  • Omnidirectional, subcardioid, cardioid, hypercardioid, figure-8 directional patterns
  • Frequency range 20 Hz - 20 kHz
  • Sensitivity 40 mV/Pa ¤, 10 mV/Pa ‚òæ
  • Equivalent noise level <18 dB SPL, A-weighted RMS ¤
  • Maximum permissible sound pressure 165 dB SPL
  • Overload sound level 130 dB (¤)142 dB (‚òæ) SPL
  • Power supply 100-130 and 220-250 volt, 20 W
  • Diameter 63 mm (100 mm wide at yoke), length 261 mm
  • Weight 1.2 kg
  • Power supply dimensions 335 x 152 x 92 mm, 3 kg
  • Microphone connector modified Binder 691 (“large Tuchel” type) 12 contact
  • Output connector 3-pin XLR
  • Made in USA

The Josephson C725 is a hybrid large-diaphragm condenser microphone using a vacuum tube, solid state circuitries, and the dual-diaphragm capsule originally used in the C700 and C716 microphones.

The Josephson C725 offers five switchable directional patterns controlled by a unique selector to optimise the signal path and change sensitivity.

The head grille uses Josephson’s patented aluminium foam, which offers physical and electrical protection. The ultra-fine, highly open mesh offers protection from external contamination. This design provides minimal and randomised internal reflections, ensuring a clean and detailed pickup.

The internal circuit uses a cascade topology with a low-noise FET for the voltage gain section and a pentode vacuum tube for the current gain stage. This combination provides the benefits of low noise of the FET and the dynamic characteristics of a vacuum tube. This is followed by a custom nickel-core transformer with independent windings for output and gain control.

The C725 is powered by a PS725 power supply which can be used on 100V and 240V operations and gives control of the five direction patterns. The selector signal/dynamics characteristics offer a choice between the warmth of vacuum tube microphones and a reduced sensitivity with a more neutral tone and higher headroom.

The C725 has a 3m long large Tuchel 12-contact connector that can be extended up to 50 meters. It ships in a rugged, Pelican-fitted carrying case with a dedicated power supply, line cord and protection sleeve.

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