See all parts that fit your 2018 Flex
400W RMS Class D Formula Series 4 Channel Car Amplifier
Product highlights
• 50 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier
Install New Speakers in select 1998-2024 vehicles from Ford, Lincoln, Mercury
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List price $9.99
Infinity REF687F (INFSPKRF687FUS)
360W Peak (120W RMS) 6x8" Reference Series 2-Way Coaxial 3-ohm Speakers
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Universal 6x8" or 5x7" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)
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50W RMS 3.5” C2 Series 2 Way Coaxial 4-ohm Car Speakers
$134.99
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200W Peak (100W RMS) 3/4” CS Series 4-ohm Titanium Dome Tweeters
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This offer cannot be combined with any other coupons or offers.
MB Quart FA2-400.4
30% off
$172 99
$517 99
Priced separately $690 98
Promo Savings of $155 40
Total price:
$535 58
This offer cannot be combined with any other coupons or offers.
MB Quart FA2-400.4
30% off
$172 99
$119 99
Priced separately $292 98
Promo Savings of $36 00
Total price:
$256 98
This offer cannot be combined with any other coupons or offers.
MB Quart FA2-400.4
50% off
$172 99
$49 99
Priced separately $222 98
Promo Savings of $25 00
Total price:
$197 98
MB Quart Formula series compact four channel car audio amplifier featuring innovative sound quality and power technology. The FA2-400.4 is a 400 watt bridgeable car audio amplifier. Formula amplifiers feature DC Sensing to allow any amplifier to be easy integrated into an OEM system by simply adapting a RCA cable from the source unit. MB Quart’s Class Q1 offers the efficiency of today’s D-Class with increased engineering to focus on sound quality from the power supply through the output devices, the FLUID-FETS.
2 Infinity REF507CF (INFSPKRF507CFUS) w/ Adapter Plates
390W Peak (130W RMS) 5.25" Reference Series 2-way 3-ohm Component Speaker System with Speaker Adapter Plates
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600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers
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List price $119.99
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready
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360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers
$99.95
List price $139.95
480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)
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6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)
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List price $620.00
600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers
$109.00
List price $119.99
150W Peak (50W RMS) 3.5" Club Series 2 Way Coaxial 3-ohm Speakers
$79.95
List price $109.95
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Manufacturer:
Model Number:
FA2-400.4
Weight:
3.21lbs
Internal SKU:
fa24004
Internal Product ID:
199596
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Amazing sound!
I picked this amp up on sale here. I recently took my entire stereo system apart to upgrade a few things and decided to add this amp for the dash and door speakers. I removed my extended cab jumpseat and built an amp rack in that space to hold this amp and my sub amp along with some wiring and distribution blocks. This amp is small and fit nice in the space. I haven't tuned it yet but it already sounds amazing! The terminals on this amp are some of the best I have ever seen. Wires fit tight and secure. I'm happy with my purchase so far.
Verified purchase
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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:
Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.
