Product Description
FXB-1400.4
POWER @ 14.4V
4-CHANNEL MODE
- 375W RMS × 4 @ 2 Ohms
- 200W RMS × 4 @ 4 Ohms
- 1,500W RMS Combined @ 2 Ohms
- 2-Ohm Minimum Impedance per Channel
2-CHANNEL BRIDGED MODE
- 700W RMS × 2 @ 4 Ohms
- 400W RMS × 2 @ 8 Ohms
- 4-Ohm Minimum Bridged Impedance
HIGHLIGHTS
- Compact Class D full-range 4-channel amplifier
- 375W RMS × 4 @ 2 ohms
- 1,500 watts RMS combined output at 2 ohms
- 200W RMS × 4 @ 4 ohms
- Fully bridgeable at 4 ohms
- 700W RMS × 2 bridged @ 4 ohms
- Only 7.01 inches long
- Perfect for motorcycle and powersports audio
- Excellent for modern vehicle and OEM system integration
- Ultra-fast switching design
- 10V–16V operating range
- 10Hz–25kHz full-range frequency response
- HPF / FULL / LP-BP crossover selection
- 2-channel / 4-channel input selection
- Metal detent crossover potentiometers
- Tiffany-style RCA connections
- Reversible SHCA emblem
- LED power indicator
- Clipping indicator
- Protection indicator
- Fanless design
- 85% efficiency at full power
- 95 dB signal-to-noise ratio
- 180 damping factor
- <0.1% THD
- Thermal protection
- Overload protection
- DC output protection
- Short-circuit output protection
- Voltage input protection
- 4-gauge power terminals
- 10-gauge speaker output terminals
- 150A fuse rating
- SHCA modular mounting ecosystem compatibility
- SHCA Universal Amp Key mounting options
- Passive cooling options
- Multiple color options
- Additional amplifier accessories available
- 1-Year Manufacturer Defect Warranty
DIMENSIONS
5.9" W × 7.01" L × 2.1" H
FOUR CHANNELS. 1,500 WATTS. ONLY 7 INCHES LONG.
The Sky High Car Audio FXB-1400.4 takes compact full-range power to another level.
Measuring just 5.9" × 7.01" × 2.1", this ultra-compact Class D full-range 4-channel delivers an impressive 375 watts RMS × 4 at 2 ohms and 200 watts RMS × 4 at 4 ohms at 14.4V.
That's 1,500 watts RMS of combined 4-channel output from an amplifier barely 7 inches long.
Don't let the compact size or reasonable price fool you.
The FXB-1400.4 was built to deliver serious SHCA power, quality, flexibility, and installation options in a chassis small enough to go places traditional high-output 4-channel amplifiers simply can't.
This isn't just a compact amplifier.
It's serious 4-channel power without the space requirement that normally comes with it.
BUILT FOR THE PLACES BIG AMPS CAN'T GO.
As modern audio systems become more powerful, installation space isn't getting any bigger.
In many cases, it's getting smaller.
That's exactly where the FXB-1400.4 comes in.
Its incredibly compact footprint makes it perfect for motorcycle audio, powersports applications, modern vehicle integration, factory system upgrades, under-seat installations, behind-seat installs, hidden systems, and custom builds where every inch matters.
For motorcycle and powersports audio, the combination is especially impressive.
You're getting up to 375 watts RMS per channel from an amplifier only 7.01 inches long and 2.1 inches tall.
Modern vehicle integration presents many of the same challenges. Factory electronics, tighter interiors, limited mounting locations, and increasingly complex OEM systems can make amplifier placement one of the hardest parts of the build.
The FXB-1400.4 gives installers serious power without demanding serious real estate.
Maximum usable power. Minimum wasted space.
375 WATTS. FOUR CHANNELS.
This is where the FXB-1400.4 starts showing just how much power we've managed to fit into the FXB platform.
At 2 ohms:
375 watts RMS × 4 channels at 14.4V.
That's a combined 1,500 watts RMS across four channels.
At 4 ohms:
200 watts RMS × 4 channels at 14.4V.
That gives the FXB-1400.4 enough power for serious component systems, high-output midrange drivers, pro-audio speakers, motorcycle audio systems, or other applications where a traditional low-powered 4-channel simply isn't enough.
But four-channel operation is only part of what this amplifier can do.
Bridge it.
FULLY BRIDGEABLE AT 4 OHMS.
Need fewer channels and even more power?
The FXB-1400.4 is fully bridgeable at 4 ohms.
In 2-channel bridged mode, this little amplifier produces:
700 watts RMS × 2 at 4 ohms at 14.4V.
It can also deliver:
400 watts RMS × 2 at 8 ohms at 14.4V.
That gives you an enormous amount of flexibility from one compact amplifier.
Run all four channels independently. Bridge a pair when one part of the system needs additional power. Or bridge both channel pairs and turn the FXB-1400.4 into an incredibly compact, high-powered 2-channel amplifier.
Four channels when you need them. Massive bridged power when you don't.
ULTRA-FAST SWITCHING. FULL-RANGE PERFORMANCE.
The FXB-1400.4 isn't just about putting a big number into a small chassis.
Its ultra-fast switching Class D design provides full-range frequency response from 10Hz to 25kHz, making it an extremely versatile amplifier for modern high-output audio systems.
A selectable HPF / FULL / LP-BP crossover control allows the amplifier to be configured around a wide variety of speakers and system designs.
A 2-channel / 4-channel input selection switch adds even more flexibility and can simplify signal routing depending on how the system is configured.
The crossover section also features metal detent potentiometers, giving installers positive adjustment points when dialing in the amplifier.
Add Tiffany-style RCA connections, and the FXB-1400.4 continues the FXB philosophy of bringing features and hardware normally associated with more expensive amplifiers into a much more accessible platform.
1,500 WATTS. NO INTERNAL FAN.
Packing this much output into an amplifier this small makes efficiency extremely important.
The FXB-1400.4 uses an efficient Class D platform rated at 85% efficiency at full power and is designed to operate without an internal cooling fan.
No fan means no additional fan noise, making it especially attractive for motorcycles, powersports vehicles, OEM integration, hidden installations, and applications where the amplifier may be mounted close to the occupants.
And just because we eliminated the fan doesn't mean we eliminated protection.
The FXB-1400.4 includes thermal, overload, DC output, short-circuit, and voltage input protection, along with dedicated power, clipping, and protection indicators.
Compact doesn't mean stripped down.
MADE TO INTEGRATE.
The FXB-1400.4 operates from 10V to 16V, giving installers a wide operating range for automotive and powersports electrical systems.
A 4-gauge power input handles incoming power, while substantial 10-gauge speaker output terminals give builders room for serious speaker wiring despite the amplifier's compact dimensions.
The reversible emblem allows the logo orientation to be corrected depending on how the amplifier is mounted—another small detail that becomes important when you're building a finished installation instead of simply hiding an amplifier somewhere.
PART OF THE SHCA MODULAR AMP ECOSYSTEM.
The compact chassis is only part of what makes the FXB Series different.
The FXB Series brings the modular, customizable amplifier concept made popular by our SHCA Series amplifiersinto our compact amplifier lineup.
Using the SHCA Universal Amp Key system, FXB amplifiers can take advantage of SHCA mounting and customization options, opening up entirely new possibilities for clean amplifier racks, motorcycle installations, modern vehicle integration, and tight custom builds.
Mount it flat. Mount it at an angle. Combine multiple amplifiers together. Add passive cooling. Change the look with different passive cooling color options.
The available cooling, mounting, color, and accessory options allow builders to configure the FXB platform around the installation instead of designing the installation around the amplifier.
That's especially important when space is limited.
Small amplifier. Huge possibilities.
IMPORTANT IMPEDANCE NOTICE
The FXB-1400.4 has a minimum impedance of 2 ohms per channel in stereo mode and 4 ohms when bridged.
Operating the amplifier below these minimum impedances can cause amplifier damage and is not covered under the 1-Year Manufacturer Defect Warranty.
DON'T LET THE SIZE FOOL YOU.
The FXB-1400.4 represents exactly what we set out to accomplish with the FXB Series:
Serious power. High-quality construction. An incredibly compact footprint. SHCA customization. And a price that makes you look twice.
Motorcycle. Powersports. Modern vehicle integration. Factory upgrade. Full custom build.
1,500 watts RMS. Four channels. Barely 7 inches long.
Run four channels. Bridge it at 4 ohms. Mount it where a traditional high-output amplifier won't fit.
This isn't a small amplifier that happens to make big power.
It's a big amplifier that we figured out how to make small.
Sky High Car Audio FXB Series
BIG POWER. SMALL FOOTPRINT. BUILT THE SHCA WAY.
POWER HOW YOU WANT IT.
