sE Electronics Gemini II Demo

Dual-tube Cardioid Condenser Microphone with 12AX7 Input Tube and 12AU7 Output Tube
sE Electronics Gemini II image 1
sE Electronics Gemini II image 1
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sE Electronics Gemini II
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A Mic You'll Love to Sing Into!

A tube mic - but even better! sE Electronics puts its own spin on the classic tube mic with the Gemini II. We've all heard tube mics on some of the most famous vocal recordings of all time, but you've never heard a tube mic like this. The Gemini II puts a cool spin on the traditional tube mic, using both a 12AX7 at the input stage and a 12AU7 at the output stage. Two tubes, huh? You might think this would put too much tubiness in play, but in actuality it gives you the body and warmth of a tube mic coupled with the top-end response of the "best of the best" solid state condensers. How could you go wrong? Many things promise to give you the best of both worlds, and few really do. The Gemini II delivers, and how! Give your mic locker a kick in the pants with the Gemini II. You won't be sorry!

sE Electronics Gemini II Dual-tube Condenser Microphone Features at a Glance:
  • Dual-tube design
  • 12AX7 at input stage
  • 12AU7 at output stage
  • Brings you best of classic tube mic designs with solid state-style top-end
  • Frequency Response: 20Hz-20KHz
  • Sensitivity: 12.6mV/Pa - 38 +/- 1dB(0dB=1V/Pa 1000Hz)
  • Polar Pattern: Cardioid
  • Impedance: 200 Ohms
  • Equivalent Noise Level: 12dB(A weighted)
  • Max SPL for 0.5% THD@1000Hz: 135dB
  • Power Requirement: External PSU included.
  • Connector: 3-pin
An innovative tube mic from sE Electronics Gemini II!

What Makes a Product a "Demo"?

At Sweetwater, "Demo" usually means one of the following:

  • It spent some time on display in our store.
  • It was used in a sales training presentation.
  • It was returned by another customer who tried it out for a few days.

Every demo item we sell is certified to be in perfect working order and backed by Sweetwater's 2-year Total Confidence Coverage warranty. Demos are thoroughly inspected by our Factory-Authorized technicians, and you will find their detailed condition notes on the product page. If you have any questions, please call us at (800) 222-4700.

Additional Media

Studio Microphone Buying Guide

Tech Specs

Microphone Type Tube Condenser
Polar Pattern Cardioid
Diaphragm Size 1.06" (27mm)
Frequency Response 20Hz-20kHz
Max SPL 135dB
Output Impedance 200 ohms
Self Noise 12dB (A weighted)
Low Cut Filter 100Hz
Pads -10dB
Color Green
Connector XLR
Weight 2.6 lbs.
Included Accessories Power Supply, Shock Mount, Wood Case, Flight Case
Manufacturer Part Number Gemini II

Customer Reviews

Based on 7 reviews
Write your review

Great and big sounding mic

The biggest sounding mic I ever tried on acoustic guitar! Full of clear detail, a great doze of tube sound but not in an exaggerated way like some mics do and kill the detail and strangely the most 3 dimensional sounding mic I ever seen after using many mics that cost triple the price of this one.
Music background: audio engineer

Perfect for vocal

i just test this beautiful lady for baritone and tenor vocals.. just amazing! one of the best mic for vocal i ever seen
Music background: record engineer,singer,composer&consert pianist

Poor Man's M 149

A few friends and I did a shootout between the Gemini II, a M 149 Tube and a TLM 103. First off, the M 149 was hands down the best. However the Gemini II sounded unbelievably similar. We were all floored by how this beastly microphone seemed to transcend the price barrier and provide AMAZING results for the money. The Gemini was a little more heavy in the low end, the M 149 was a little clearer all around. However at a little over 3K less than the 149, this mic sits so incredibly close to the sound quality of the M 149 you won't be dissatisfied. After not mentioning the TLM 103 (which I love as well) I still feel I don't need to mention it. If you want a mic that gives you smooth vocals, warm acoustic guitars and just leaves you satisfied from the moment you turn up the gain on this beast, look no further. Pair this with the SE Reflexion Filter for great results!
Music background: Recording Engineer


i used this mic to record vocals and acoustic guitars its so crisp and clean and it picks up every single detail no much eq needed perfect for lead vocals..
Music background: Recording engineer

This mic is awesome

i have this mic like 6 months now at first i thought it sounded a little high in the mids fq but after adjusting my mic pre it sounded perfect great buy very warm and upfront sounds great on lead vocals
Music background: dj/ producer

Sweetwater Advice

Carson McClain

The sE Electronics Gemini II is a serious mic for the modern recording engineer! Get the massive warmth you want from vintage and the clarity of modern mics all in one package. Two tubes in one mic, oh my!
See also: Condenser Mics, sE Electronics, sE Electronics Condenser Microphones, sE Electronics Condenser Microphones