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The Gemini II Dual Tube Microphone from soe Electronics is designed for crucial capturing of vocals and instruments in professional recording applications and features a unique dual tube design. The soe-Electronics twin triode valves feature a 12AX7 (ECC83) and 12AU7 (ECC82) tubes that provide pristine warmth and detail at the input and output stages of the microphone.

The Gemini II maintains a low noise floor, minimising the "room noise" associated with most tube microphones. The capsule houses a large diaphragm cardioid element that features a wide 20 Hz to 20 kHz frequency response. The cardioid polar pattern is flexible for most applications as it rejects ambiance and noise at the off-axis sections of the capsule. The Gemini II uses an external Power Supply Unit (PSU) and an 3-pin screw-on terminal ensures a secure connection from the microphone to the PSU. A generous 13 foot (4.2 metre) cable is supplied for flexible placement and a heavy duty, wooden storage case is also supplied.

Key Features

High Pass Filter Switch

The Gemini II features a few improvements over the original Gemini. A high-pass filter switch is in place and eliminates low-frequency hum and noise.

-10 dB Pad Switch

A -10 dB Pad switch has been added for attenuating microphone level when capturing excessively loud audio signals.

Dual Valve Design

The Gemini II features a twin valve design. A 12AX7 provides the warmth and detail on the input stage while a 12AU7 provides a transformer-less output stage.

Cardioid Polar Pattern

The fixed cardioid pattern rejects noise and ambiance at the off-axis sections of the capsule while.

Low Noise Floor

The Gemini's audio reproduction eliminates the ambient noise associated with most tube microphones.

Generous Cable Length

The Gemini II features a secure connection to the PSU and a generous long cable provides flexible placement.


Polar PatternCardioid
Frequency Range20 Hz to 20 kHz
Equivalent Noise Level12 dB A-Weighted
Maximum SPL135 dB SPL 0.5%
Impedance200 ohms
Sensitivity12.6 mV/PA, re: 1 V/Pa
PadYes, 10 dB
Output Connectors3-Pin XLR
sE Electronics Gemini II Dual Tube Cardioid Condenser Microphone with High Pass Filter and -10dB Pad
SE Electronics
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