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Triton Audio FetHead Filter In-line Microphone Preamp Certified Open Box , $71.96 - Add to Cart Skip to Product Information

Triton Audio FetHead Filter In-line Microphone Preamp Certified Open Box

FET-style In-line Microphone Preamplifier with Highpass Filter
Item ID: FetHeadFild1
Triton Audio FetHead Filter In-line Microphone Preamp

Certified Open Box Savings!

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Triton Audio FetHead Filter In-line Microphone Preamp Certified Open Box

Certified Open Box Savings!

Save $7.99 What is Certified Open Box?

The price below reflects your savings.

Savings: $7.99 New for $79.95

In-line Pre and HPF for Your Dynamic and Ribbon Mics

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Our Product Research Team

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Triton Audio FetHead Filter is primed and ready to elevate the performance of your gain-hungry dynamic and ribbon microphones. This in-line mic preamp utilizes top-quality Class A FET technology to yield you up to 27dB of clean boost. The result is a cleaner signal with lower noise, greater sensitivity, and improved transient response. FetHead Filter also includes a built-in highpass filter with a 220Hz cutoff for taming excessive low-frequency mud and rumble. What's more, FetHead Filter protects your delicate ribbon mics by isolating them from phantom power. If you want to get the best out of your dynamic or ribbon microphones, stop cranking your mic pres past their usable range. Get FetHead Filter, and enjoy a low-noise, squeaky-clean signal.

Convenient in-line design

Thanks to its convenient in-line design, FetHead Filter is a breeze to use. It latches effortlessly onto any XLR-equipped microphone, or you can place it anywhere between your mic and preamplifier or console. Beyond that, FetHead Filter's electronics are housed in a durable metal chassis with balanced I/O. Here at Sweetwater, we've found this compact in-line preamp to be rugged enough for home, studio, and stage alike.

27dB of juice plus a highpass filter

With 27dB of clean, FET-fueled gain on tap, Triton Audio FetHead Filter will level up the performance of any mic you plug into it. It can take a 57-style dynamic mic to an entirely new tier of performance, infusing it with agile responsiveness over a wider frequency range, while lending a studio-level character to high-end dynamic and broadcast mics. FetHead Filter reduces the impedance load on ribbon microphones, granting them enhanced transient response and an extended usable range. To top it off, FetHead Filter includes a 6dB/octave highpass filter with a 220Hz cutoff — exactly what you need to tame unwanted low-frequency rumble and excessive proximity effect.

Protects your fragile ribbon microphones

Have you ever fried a vintage ribbon mic with phantom power? If not, count yourself lucky — it's a traumatic experience. FetHead Filter safeguards against this unfortunate situation. While it employs phantom power to power its circuitry, it doesn't pass phantom power to your microphones. It's the ideal insurance policy for your fragile ribbon mics.

Triton Audio FetHead Filter In-line Microphone Preamp Features:

  • In-line mic preamp loaded with top-quality Class A FET technology
  • Delivers up to 27dB of clean, FET-fueled gain
  • Yields a cleaner signal with lower noise, greater sensitivity, and improved transient response
  • 6dB/octave highpass filter with a 220Hz cutoff tames low-frequency rumble and excessive proximity effect
  • Latches directly onto any XLR-equipped mic
  • Can also be placed anywhere between your mic and preamplifier or console
  • Safeguards fragile ribbon mics against phantom power damage
  • Electronics are housed in a durable metal chassis with balanced I/O
What is Certified Open Box Gear?

At Sweetwater, we're so picky that what we call "Certified Open Box" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

Certified Open Box (also known as a demo) means we’ve had it out of the box for our YouTube channel, displayed at events, tested in our studio, or maybe it was in a customer’s hands for a few days and isn’t ‘factory fresh’ as a result. Every Certified Open Box item we sell has Sweetwater’s 2-year Total Confidence Coverage™ warranty and has been tested and verified up to ‘new’ specs by our factory-authorized technicians to make sure it’s in perfect working order before we ship it to you.

When you buy a Certified Open Box item at Sweetwater, you get:
  • 2-year Total Confidence Coverage Warranty™!
  • Products inspected and tested by our factory-authorized techs, guaranteed to function like new (or better)!
  • FREE shipping on most items
  • Equipment that will MEET or EXCEED your expectations!

Click HERE to browse our current inventory of Certified Open Box equipment. Purchasing Certified Open Box gear from Sweetwater is a smart and safe way to save!

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.