Thomann FetAmp

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Microphone Preamplifier

Extremely low-noise Class A JFet amplifier
For dynamic and ribbon microphones
2 Matched JFet transistor pairs
Input: Balanced 3-pin XLR female
Output: Balanced 3-pol. XLR male
Input impedance: 20 kOhm
Gain: 28 dB (@ 3 kOhm source impedance)
Frequency response: 10 - 50,000 Hz (+/- 1 dB)
Requires phantom power: 24 - 48 V.
Dimensions (L x W): 77 x 22 mm
Weight: 35 g
Developed and produced in Germany

Note: Does not allow phantom power to pass through to the microphone

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3-Year Thomann Warranty

Available since August 2020

Item number 495774

Sales Unit 1 piece(s)

Channels 1

Number of microphone inputs 1

Instrument input No

Tubes No

Compressor/Limiter No

Equalizer No

De-Esser No

Phantom power No

Phase Reverse No

External effect loops No

Analogue Outputs XLR

Digitale Outputs 0

Headphone connection No

Level Meter No

Design Adaptor

B-Stock from £38 available

£41

Including VAT; Excluding £10 shipping

Delivery approx. between Wednesday, 20.11. and Thursday, 21.11.

Sales Rank

in Preamps

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Thomann FetAmp B-Stock
May have slight traces of use

£38

Good things come in small packages

The FetAmp, made by Thomann’s eponymous in-house brand, is a small, compact microphone preamplifier that can be plugged directly into the microphone before the XLR cable. This is particularly handy for dynamic microphones as well as for ribbon mics that need more power for sufficient amplification. It is supplied with electricity via phantom power and ensures that this does not reach the microphone, thus making sure that ribbon microphones are not damaged during operation. Conversely, however, this feature makes the FetAmp incompatible with condenser microphones.

Extremely low noise

The FetAmp is a Class A JFet amplifier, a design generally considered to be particularly low-noise. These amplifiers have a high input impedance - in this case 20 kOhm. The associated impedance matching reduces the load on the microphone and gives it a better transient response. The FetAmp consists of two matched JFet transistor pairs. These allow the signal to be amplified by 28 dB at a source impedance of 3 kOhm. The frequency range of the FetAmp is 10 Hz to 50 kHz with a tolerance of +/- 1 dB. In combination with the low-noise signal amplification, the usable range of the ribbon microphone is extended so that mellower sound passages can be recorded without any problems. The input consists of a balanced female three-pin XLR connector, while the output is a male XLR socket.

Small size, clear benefits

Whether in the studio or on stage: Thanks to its small length of 7.7 cm, the FetAmp fits into any travel bag – making it ideal for musicians on tour. The FetAmp’s weight is also comparatively low, tipping the scales at a mere 35 g. The FetAmp is made for those musicians and recording engineers who have long been looking for a space-saving preamplifier solution for the stage or studio which also allows them to get more power out of their dynamic microphone. Incidentally, this handy preamplifier is developed and manufactured in Germany.

About Thomann accessories

Thomann-brand products enjoy an excellent reputation, which also extends to the field of accessories. Hundreds of products from a wide range of different categories are built to the highest levels of quality and offer an excellent price/performance ratio. The use of high-quality and durable materials and the implementation of sophisticated features usually reserved for products in considerably higher price segments make Thomann accessories go-to products in many instances.

Simple and uncomplicated use

With Thomann's transistor-powered FetAmp, the sound of any dynamic microphone becomes fuller, more dynamic, and warmer due to the direct pre-amplification behind the microphone. Thanks to the low noise level, background noise - which is otherwise noticeable with different methods of pre-amplification in the form of a humming or buzzing sound - is significantly reduced. This is not only beneficial for musicians, but also for podcasters and content creators, because they can give their voices more impact with the compressor connected behind the microphone and the FetAmp. The FetAmp’s convincing features can be summarised above all in its simple and uncomplicated application as well as in its outstanding quality.

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229 Customer ratings

5 162 Customers 4 37 Customers 3 20 Customers 2 5 Customers 1 5 Customers

4.5 / 5

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147 Reviews

Excellent silent pre-amp

EdEditz 19.08.2022

Whenever I buy a Ribbon mic, I always get one of these with it because it makes a world of difference in the sound level and therefor the noise floor. You can also use them with dynamic mics to really boost the level. This one is very transparent and won't color the sound.

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So simple and yet so effective

BRandySavage 24.02.2022

I bought this little guy to pair alongside a Rode Podmic. I have tested the mic both with and without the FetAmp. This tiny piece works wonders and really amplifies the sound of the Podmic allowing me to use the Mic with my Mixer with little to no gain at all. Does exactly what it says it does.

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Does the job perfectly, needs more recognition

Ronfontu 25.01.2021

Little disclaimer: I would have gone for the Klark Teknik CT1 if it were in stock but I needed an preamp asap.

This preamp does a good job and needs more recognition imo.
There is not much to say, go for it if you want to save money and avoid overpriced stuff. I used this with the Rode Podmic (I have 2 of each) and it let me put my gain way lower, reducing ambient noise. On the two FetAmps I have bought, one is a little bit loose when plugging it into the mic, that's why I gave it 4 stars. Other than that, I didn't have any problem. I would recommend this item.

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loose fit for the SM 7B

da.vid 24.02.2022

No real issues, only that it fits the SM 7B (the only gear I tried it with) a bit loose. It clicks, but then keeps wobbly.

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Thomann FetAmp

Microphone Preamplifier