• Audioroot FEMTO portable stereo microphone preamp front view
  • Audioroot FEMTO microphone preamp rear connections
  • Audioroot FEMTO microphone preamp angled view

Audioroot

Audioroot FEMTO Portable Stereo Microphone Preamp

• Two high-gain, low-noise microphone preamps with +10dB to +64dB gain.
• 48V phantom power for condenser microphones.
• 80Hz, 12dB/oct high-pass filter.
• Sunlight-readable OLED for audio level and battery information.
• Two XLR3 mic inputs and balanced stereo XLR5 output.
• Runs from two 9V batteries or 12–18V external power.

Need help choosing?

Choose the FEMTO when you want a simple, rugged two-channel analogue mic preamp with full-size XLR inputs, balanced output and an OLED display. Choose the uPRE MKII if you also need AES/SPDIF digital output, M/S decoding, stereo linking and a wider gain range.
£399.00 (£332.50 ex VAT)
£399.00 (£332.50 ex VAT)
Tax included. Shipping calculated at checkout.

The Audioroot FEMTO is a compact, battery-powered two-channel microphone preamp designed for professional location recording, ENG, EFP and music work. Its two low-noise XLR microphone inputs provide +10dB to +64dB of gain, individually switchable 48V phantom power and an 80Hz high-pass filter.

A sunlight-readable OLED gives clear level and battery information, while the balanced XLR5 stereo output keeps the signal path straightforward. The rugged powder-coated aluminium enclosure is built for field use and can run from two 9V batteries or an external 12–18V supply.

Choosing your type

Choose the FEMTO when you want a simple, rugged two-channel analogue mic preamp with full-size XLR inputs, balanced output and an OLED display. Choose the uPRE MKII if you also need AES/SPDIF digital output, M/S decoding, stereo linking and a wider gain range.

Specifications

Channels

2

Gain Range

+10dB to >+64dB

Mic Inputs

2x XLR3

Output

Balanced stereo XLR5

Phantom Power

48V

High-Pass Filter

80Hz, 12dB/oct

Input Impedance

>5kΩ

EIN

-129.2dBu at max gain

Bandwidth

15Hz–20kHz ±3dB

Max Output Level

+18dBu

Power

2x 9V or 12–18V external

Dimensions

95 × 129 × 42mm

Weight

327g

Warranty

1 year

Compatibility

• Professional microphones using balanced XLR3 connections.
• Recorders and mixers accepting the supplied XLR5-to-2x TA3F balanced output cable.
• Audioroot FEMTO-PSU or another correctly specified 12–18V external supply.

Dimensions

Channels

2

Gain

+10–64dB

Inputs

2x XLR3

Output

XLR5

Weight

327g

What’s in the box?

• 1x Audioroot FEMTO microphone preamp
• 1x XLR5 to 2x TA3F balanced output cable

Delivery & Returns

UK standard delivery costs £4.50, with free standard delivery on UK orders over £250. Next Working Day delivery is available on eligible in-stock orders under 30kg placed before 1pm. Worldwide shipping is also available.

Consumers can return most unwanted products within 30 days of receiving them, subject to our return conditions and exclusions. Please see our Shipping Policy and Returns & Refunds Policy for full details.

Warranty

Warranty coverage varies by product and manufacturer.

If you experience a fault or would like to check whether your product is covered by a manufacturer warranty, please visit our Returns & Warranty page and complete the warranty form.

Soundkit will review your claim and, where applicable, help manage the warranty process with the manufacturer on your behalf.

Manufacturer warranties, where provided, generally do not cover misuse, accidental damage, unauthorised modification, improper storage, incorrect operation, or normal wear and tear.

Your statutory rights are not affected.

Important Notes

• The included output cable is XLR5 to 2x TA3F.
• External PSU is not included with the preamp.
• Observe correct pinout and voltage when using third-party external power.
• Audioroot dealer price list specifies a 1-year warranty.

Audioroot FEMTO Portable Stereo Microphone Preamp

£399.00
Audioroot FEMTO portable stereo microphone preamp front view

2 Channels • OLED Display • Balanced XLR5 Output

Portable Analogue Mic Preamplification

A rugged, compact preamp for recordists who want clean analogue gain, proper phantom power and straightforward controls without adding unnecessary complexity.

Audioroot FEMTO microphone preamp rear connections

2 XLR Inputs • +10 to +64dB • 48V Phantom

Clean Two-Channel Gain in the Field

The FEMTO adds two low-noise microphone channels to a location rig, with enough gain for demanding microphones and individually controlled phantom power for condenser mics.

Audioroot FEMTO microphone preamp angled view

2x 9V • 12–18V External • Up to 6 Hours

Battery or External Power

Run the FEMTO from two standard 9V batteries for a self-contained field setup, or use a suitable external supply for longer sessions and fixed installations.

What payment methods do you accept?

We accept major credit and debit cards, PayPal and a range of express payment options, including Apple Pay, Google Pay and Shop Pay. The payment methods available to you will be shown at checkout.

How can I track my order?

Once your order has been dispatched, we will email you a shipping confirmation with your tracking details. You can follow the tracking link in that email or view updates through your Shopify order-status page.

What is your return policy?

Consumers can return most unwanted products within 30 days of receiving them, provided they meet our return conditions. Some products are excluded, and business purchases are not eligible for change-of-mind returns unless agreed by Soundkit. Faulty, damaged or incorrect products are handled separately. Please see our Returns & Refunds page for full details.

Can I change or cancel my order?

Please contact us as soon as possible if you need to change or cancel an order. We will do our best to help, but changes cannot normally be made once an order has been processed or dispatched. If it has already been dispatched, you may need to return it in accordance with our Returns & Refunds policy.

Do you ship internationally?

Yes, worldwide shipping is available to many destinations. Available services, delivery costs and estimated times will be shown at checkout. International orders may also be subject to local customs duties, taxes and import fees.

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