sE FCA1 Fluxcore Ultra-HiZ Active DI Box

Hear Your Instrument. Nothing else. - The sE Electronics FCA1 FluxCore Ultra-HiZ Active DI Box

The FCA1 Ultra-HiZ Active DI is engineered for instruments that demand the highest possible input impedance. Its switchable Ultra-HiZ input offers up to an impressive 10 Mohms of input impedance, preserving the natural tone, dynamics, and full frequency response of passive guitar pickups, piezo-equipped instruments, and other high-impedance sources. Selectable impedance settings of 10 Mohms, 100 kohms, and 10 kohms allow the input characteristics to be matched to virtually any instrument or application.

• Switchable Ultra-HiZ input with up to 10 Mohms of input impedance
• Selectable input impedance: 10 Mohms, 100 kohms, 10 kohms
• Preserves the natural character, dynamics, and frequency response of sensitive sources, including passive guitar pickups and piezo transducers
• Switchable DYNAMITE gain boost delivering 15 dB or 30 dB of ultra-clean gain
• Switchable attenuation pad: 0, -15, -30 dB
• POLAR switch allows signal polarity inversion
• Shielded heavy-duty transformer and innovative on + Ground Lift circuitry
• High headroom, low distortion, and exceptional sound quality
• Minimizes hum and radio frequency interference
• Non-slip mounting pad included for studio use
• Hook-and-loop mounting pads included for pedalboards and gig racks
• Mount up to four units on a standard 1U rack shelf; screws included
• Secure stackable design for multi-channel setups
• Matte-black stealth finish
• Solid steel enclosure
• Front and rear +48 V LEDs for phantom power indication

To further maximize signal quality, the FCA1 features an integrated DYNAMITE gain boost delivering 15 dB or 30 dB of ultra-clean gain directly at the source. By increasing the signal level before long cable runs or electrically noisy environments, the FCA1 helps preserve every nuance of your performance from instrument to mixing console.

At the heart of the FCA1 is a custom-designed, shielded heavy-duty transformer providing galvanic isolation, delivering exceptional headroom, low distortion, and outstanding noise rejection. Together with the innovative on + Ground Lift circuitry, hum, ground loops, and radio-frequency interference are effectively minimized, ensuring clean, transparent audio in even the most challenging live and studio environments.

Both models feature switchable attenuation pads for handling high-output sources such as guitar and bass amplifiers without distortion, while their custom transformers maintain exceptional headroom and signal integrity under demanding conditions.

Designed with versatility in mind, the FCA1 offers a wide range of mounting options. A non-slip mounting pad is included for desktop and studio use, hook-and-loop pads allow secure installation on pedalboards and gig racks, and up to four units can be mounted in a single 1U rack space using the supplied mounting screws. Its stackable design also makes multi-channel stage setups neat, secure, and easy to configure.

Its compact footprint and heavy-gauge steel construction make the FCA1 ideal for professional stage, studio, and touring applications. The robust all-metal design provides exceptional durability, while the discreet matte-black stealth finish blends seamlessly into any stage, studio, or pedalboard setup. Front and rear +48 V status LEDs provide instant phantom power indication from either side, making operation even easier in any environment.

SPECIFICATIONS

General

• Type: Active
• Frequency Range: 10–80,000 Hz (-0.3 dB)
• Input Impedance, ATT PAD 0 dB: 10 Mohms / 100 kohms / 10 kohms
• Input Impedance, ATT PAD -15 dB: 12 kohms / 12 kohms / 12 kohms
• Input Impedance, ATT PAD -30 dB: 10 kohms / 10 kohms / 10 kohms
• Attenuation Pad: 0 / -15 / -30 dB
• Max Input Level (0.5% THD), ATT PAD 0 dB: 8 dBV (2.75 V)
• Max Input Level (0.5% THD), ATT PAD -15 dB: 24 dBV (15 V)
• Max Input Level (0.5% THD), ATT PAD -30 dB: 39 dBV (87 V)
• Gain: 0 / +15 / +30 dB
• Output Noise Level (JIS-A), GAIN 0 dB: 1.4 µV
• Output Noise Level (JIS-A), GAIN +15 dB: 6.4 µV
• Output Noise Level (JIS-A), GAIN +30 dB: 29 µV
• Powering: 48 Volts Phantom Power according to IEC 61938
• Electrical Output Impedance: 60 ohms
• Recommended Load Impedance: Greater than 1k ohms
• Current Consumption: 7.2 mA
• System Requirements: 48V Phantom Power required

Connectivity

• Input: 6.3 mm (1/4 in.) TS jack
• Thru: 6.3 mm (1/4 in.) TS jack
• Output: 3-pin male XLR connector

Dimensions & Weight

• Dimensions (L x W x H): 127 x 100 x 39 mm (5.0 x 3.9 x 1.5 in.)
• Weight: 795 g (1.75 lbs.)

Included Accessories

• Non-slip mat
• Hook-and-loop pads
• 4 rack-mount screws
• sE logo stickers
• User manual

We are Chuck Levin's Washington Music Center

Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.