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Open-Box sE Electronics Gemini II Dual Valve Condenser Microphone Condition 1 - Mint

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Overview

A dual-valve tube condenser mic with huge, intimate tone.

Capturing performances with warmth, detail and control requires a microphone that can translate both character and precision. The sE Electronics Gemini II dual valve condenser microphone is designed for studio recording applications that demand a classic tube response with modern clarity. Its dual-tube architecture—featuring a 12AX7 input valve and a 12AU7 output stage—works in tandem with a handcrafted 1.4" true condenser capsule to deliver a full, detailed signal across a 20Hz–20kHz frequency range. With a cardioid polar pattern and high SPL handling up to 151dB, it is well suited for vocals, instruments and room capture, providing consistent performance across a wide range of recording scenarios.

Dual Valve Circuitry Delivers Balanced Warmth and Transient Detail

The Gemini II uses a dual-tube signal path to shape its response, combining the gain characteristics of the 12AX7 input valve with the output stage control of the 12AU7. This configuration supports a balanced signal with both harmonic depth and transient detail. A switchable -10dB pad allows the microphone to accommodate louder sources such as drum overheads and guitar cabinets, while the 150Hz low-cut filter helps reduce unwanted low-frequency buildup. Together, these controls give engineers flexibility when adapting the mic to different recording environments.

Handcrafted Capsule and Low-Noise Design

At the core of the Gemini II is a hand-crafted 1.4" true condenser capsule with gold-sputtered diaphragms, designed for consistent sensitivity and detailed capture. The solid metal housing provides durability for daily studio use while helping shield internal components from external interference. With a low self-noise rating of 13dB and a wide dynamic range, the microphone maintains clarity across both subtle and high-energy performances, supporting clean signal capture in a variety of recording situations.

Integrated Power Supply and Cardioid Pattern

Designed for professional recording environments, the Gemini II includes a dedicated power supply, custom shock mount and multi-pin cable for stable operation and straightforward setup. Its cardioid pickup pattern focuses on the source while minimizing off-axis noise, making it effective for vocals, acoustic instruments and room applications. With its combination of tube-driven character, controlled response and adaptable features, the sE Electronics Gemini II dual valve condenser microphone provides a reliable solution for engineers seeking consistent, detailed results across a range of studio workflows.

Features

  • Dual-valve tube condenser microphone designed for detailed studio recording applications
  • 12AX7 and 12AU7 tube stages deliver harmonic depth and controlled output response
  • 20Hz–20kHz frequency response captures full-range detail across sources
  • Handcrafted 1-1/4" condenser capsule supports clear, accurate sound reproduction
  • 151dB max SPL handles loud sources including drums and guitar cabinets
  • Switchable -10dB pad adapts to high-volume recording environments
  • 150Hz low-cut filter reduces rumble and low-frequency buildup
  • Cardioid polar pattern focuses on source while minimizing bleed
  • Gold-sputtered diaphragm maintains consistent sensitivity and performance
  • Includes shock mount, power supply and cables for complete studio setup

Discover the sE Electronics Gemini II dual valve tube condenser mic and give every take larger-than-life warmth, detail and presence instantly.

Specs

Gemini II Dual Valve Condenser Microphone Specifications:

General
  • Product type: Tube condenser microphone
  • Model: Gemini II
  • Transducer type: True condenser
  • Capsule: 1.25" dual-diaphragm
  • Tube complement: 12AX7 / ECC83, 12AU7 / ECC82
  • Polar pattern: Cardioid
Audio Performance
  • Frequency response: 20Hz–20kHz
  • Sensitivity: 40mV/Pa (-28dBV)
  • Maximum SPL: 151dB / 145dB / 135dB (depending on pad setting)
  • Dynamic range: 122dB / 132dB (with pad)
  • Equivalent noise level: 13dB
  • Signal-to-noise ratio: 81dB
Impedance
  • Output impedance: 200 ohm
  • Recommended load impedance: Greater than 1 kohm
Controls
  • Pad: 10dB switchable
  • Low-cut filter: 150Hz, 6dB/octave, switchable
Connectivity
  • Connector: 3-pin XLR male
  • Cable: 8-pin microphone cable (to power supply)
Power
  • Power supply: External PSU (included)
Construction
  • Housing: Metal with solid brass chassis
  • Diaphragm: Gold-sputtered Mylar
  • Design: Transformerless dual-tube circuit
Dimensions
  • Microphone: 3.15" × 8.66"
  • Power supply: 7.32" × 6.18" × 3.19"
  • Microphone: 2.60 lb.
  • Power supply: 4.34 lb.
Accessories
  • Included accessories: Power supply, 8-pin cable, shockmount, IEC power cable, wooden box, flight case, user manual
Q&A

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