Item # 271357 | Customer Ratings: ( 4 Based on 5 reviews)

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Sterling Audio ST66 Large Diaphragm Tube Condenser Microphone
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Add tube condenser warmth and depth to your recordings.

The Sterling Audio ST66 is a tube condenser microphone that employs a large capsule with an ultra-thin 3-micron evaporated gold Mylar diaphragm. Optimized to capture the most definition and detail from all acoustic instruments like piano, drums, and guitars, the ST66 mic's low-noise GT6205M tube in a Class-A triode circuit provides warmth and detail, adding new dimension to vocal and especially instrument recording.

The ST66 uses triode wiring on specially selected pentode tubes to yield low noise and a more realistic dynamic response than their competitors. Its power supply is designed with a load-balancing circuitry that allows cable runs of more than 200 feet with no deviation from optimal performance.

Sterling Audio microphones employ several advanced technologies that separate their large-diaphragm condenser mics from the rest of the pack.

One of the more important advancements is their Disk Resonator system. With it, Sterling Audio is uniquely able to compensate for the 14kHz frequency roll-off that is inherent in large diaphragm mics. As any good audio engineer knows, this deficiency translates to a lack of sparkle from high-frequency sound sources.

Other manufacturers have typically solved this problem by cutting other frequencies and then increasing the entire signal to help even out the frequency range. Unfortunately, this results in increased noise.

Disk Resonator Technology incorporates a brass umbrella that protrudes from the center of the diaphragm in Sterling Audio's ST66 microphone. It gently boosts the diaphragm sensitivity to shorter sound waves, allowing it to respond more accurately to those all-important higher frequencies. The result is optimal sensitivity, full frequency response, and a low signal-to-noise ratio.

Another piece of audio wizardry comes in the form of the ultra-thin diaphragm membrane made of Mylar. While most modern condenser diaphragms are 6 to 12 microns in thickness, Sterling Audio, in association with 3M, has produced a highly resilient Mylar that measures a mere 3 microns. This allows the ST66 to deliver an extraordinary degree of sensitivity.
Requires phantom power.

Sterling Audio ST66 Large Diaphragm Tube Condenser Microphone Features:

  • Low-noise GT6205M-USA tube
    Disk Resonator design extends high-frequencies naturally
    Large 1-1/4" all-brass capsule, hand assembled and oven baked for long term, stable operation
    Low-noise mic cable with Neutrik connectors
    Nickel-plated all brass body
    Custom-wound nickel core output transformer
    ST-SM4 shockmount
    7-pin XLR mic cable
    PSM1 power supply and cord

Sterling Audio ST66 Large Diaphragm Tube Condenser Microphone Specifications:

  • Preamp: Tube-based, Class-A design
    Polar Patterns: Fixed cardioid
    High Pass Filter: Switchable 75Hz, 12dB/octave
    Attenuation Pad: Switchable -10dB
    Frequency Response: 20Hz — 20kHz
    Equivalent Noise: 23dB SPL — A Weighted
    Sensitivity: 35mV/Pa
    Signal/Noise Ratio: 79dB A-Weighted
    Maximum SPL: 130dB-140dB (adjustable w/pad)
    Typical Load Impedance: >500 ohms
    Output Source Impedance: 200 ohm transformer isolated
    Dimensions: 7-1/2" long, 1-4/5" max. dia.
    Weight: 1 lb.

Product Reviews
(Based on 5 reviews)
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  • You want quality, here it is.

    As reviewed by Gbluesy on 4/21/2009

    This is by FAR the best Mic investment I ever made. I have NOTHING to say about this mic in a negative way. It is the best sounding mic you can ask for. Do not let the price fool you, it more than worth it. A whisper or a yell produces the exact same effects and it will serve you 2X back in tone, quality and ambient satisfaction. I use it for recording only, never took it out of the studio, So live recordings may prove to be different. But for a studio, this is one of the best values I seen yet.

    21 of 21 people found this review helpful.
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  • Good Vocal Mic

    As reviewed by Danielle Resende on 12/29/2011

    I am male baritone country singer and bought this microphone solely for recording vocals. I first recorded using the preamp on the mackie mixer or on the steinberg audio interface. I couldn't seem to get the sound I was after. I felt the sound was kind of muddy and missed the subtleties of my voice. I actually preferred my sm57 using those same preamps. I then purchased a GAP Pre73 preamp and I have to say what a difference! The ST66 is now much better sounding with my voice making it sound more warm than muddy. I can hear the details in my voice a whole lot more. The sound of the sm57 improved also but it wasn't such a startling difference as the st66. I guess the bottom line is if you're going to buy this mic make sure you use a high quality preamp with it or you might be disappointed.

    1 of 1 people found this review helpful.
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  • Unbelievable definition and clarity!

    As reviewed by Darnstrat on 10/9/2006

    In recent years, the onslaught of Chinese made condenser microphones has at least given the home/project studio the 'look' if not the 'sound' of pro studios. Many of these imports are excellent values for the money but still aren't quite up to the standards required for professional recording. The Sterling Audio line of microphones changes all that. I purchased the ST66 with the intent of using it primarily as a vocal mic, wanting the traditional 'warmer' sound found in tube microphones. However, the first application I got to use it on was recording an acoustic guitar. Normally I would have used a small diaphragm condenser to capture the transients and give the guitar more bite on the picking. I was awestruck at the results of the ST66! The clarity, transparency, and the dynamic response resulted in one of the best recordings of guitar I've had in 30 years. I immediately tried it on a squareneck Dobro, and the results were just as stunning. Male vocals recorded using the mic were warm and silky smooth.. the proximity effect that cardioid mics are known for sometimes means that the low end blows out the overall sound.. not so with ST66. By using the high-pass filter, the resulting warmth is enhanced and lets the true character of a voice shine. The 3 micron diaphragm obviously results in a superior dynamic response. Coupled with the class-A tube amplifier and very low self-noise, the ST66 compares (and in my opinion) exceeds the quality of some well-known German mics that one would pay 4 or 5 times the cost of the Sterling Audio. Additionally, the mic features an -10db pad and a switchable high-pass filter. The mic is incredibly solid and well-built. The included shock mount is far superior than that found with most Chinese imports and the power supply is rugged and appears to be built to last. Overall, I cannot find any faults in this microphone other than I now want several more. Take the next step up in recording and try out the ST66. You won't be disappointed.

    40 of 41 people found this review helpful.
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Westlake Village, CA 91359
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