Josephson Engineering C725
Large-diaphragm hybrid tube/FET condenser, multi-pattern, external power supply
Microphone$10,250Manufacturer list price
Specifications
- Type
- Microphone
- Description
- Large-diaphragm hybrid tube/FET condenser, multi-pattern, external power supply
- Topology
- condenser (large diaphragm, dual-diaphragm capsule), hybrid vacuum-tube/FET cascode
- Signal path
- Analog
- Channels
- 1
- Channel format
- mono, balanced
- Form factor
- Large side-address body, patented aluminum-foam grille fused to housing, satin nickel finish, yoke-mounted, internally shock-mounted; supplied with rugged fitted carrying case
- Connection
- XLR (audio) + Binder 691 12-pin (mic-to-PSU power/control)
- DSP
- false
- Powered
- true
- Power (W)
- 20
- Drivers
- Dual-diaphragm capsule shared with C700/C716 series; hybrid cascode circuit using a custom low-noise FET for voltage gain and a new-production pentode vacuum tube for current gain; custom nickel-core output transformer with independent output/gain-control windings
- Frequency response
- 20-20,000 Hz
- Max SPL
- 130 dB SPL ('moon' mode) / 142 dB SPL ('sun' mode)
- Sensitivity
- 40 mV/Pa ('sun'/full-gain mode); 10 mV/Pa ('moon' mode, -12 dB negative feedback)
- Polar pattern
- 5 switchable patterns: omnidirectional, subcardioid, cardioid, hypercardioid, figure-8
- Introduced
- 2018
- Country of manufacture
- USA
Details
Controls: PS725 external power supply: 5-position directional pattern selector (omni, subcardioid, cardioid, hypercardioid, figure-8) and 'sun/moon' (warm/cool) voicing switch via internal reed relay
I/O: 3-pin XLR mic-level output; 12-pin Binder 691 ('large Tuchel') cable, extendable to 50m, connecting mic to external PS725 power supply
Notable use: Premium classic-style tube studio microphone for detailed vocal and instrument pickup; Josephson's top-of-line hybrid tube flagship, positioned above the all-FET Series Seven models
Notes: LDC, dual-diaphragm, hybrid tube/solid-state — NOT phantom powered; runs from dedicated PS725 external linear power supply (100-120V or 220-240V mains, switchable, 20W), unlike the rest of the Josephson line. Shipping began in 2018 after 5+ years of development (secondary sourcing, flagged). No standalone c725.html product page found; linked to the Series Seven overview page as the closest verifiable manufacturer source.