Garage
Shop

See all parts that fit your 2023 X1

MB Quart FA1-900.5

900W Peak Formula Series Class A/B + Class D 5-Channel Amplifier

MB Quart
Shop all MB Quart
highlight-star-icon

• FORMULA Series 5-Channel Class A/B + Class D Amplifier
• 500W x 1 @ 1 ohm (Channel 5 only) / 100W x 4 + 350W x 1 @ 2 ohm / 60W x 4 + 250W x 1 @ 4 ohm
• DC Signal Sense
• FLUID-FETS
• Heavy duty heat-sink efficiently moves heat from the MOSFET
• Bass Boost: 0-12dB

Learn more about the fa19005

We apologize

This item has been discontinued


Loading...
Club 322F main

JBL Club 322F (SPKCB322FAM)

150W Peak (50W RMS) 3.5" Club Series 2 Way Coaxial 3-ohm Speakers

1
-27.29%

$79.95

List price $109.95

JS35K main

Jensen JS35K

150W Peak (50W RMS) 3.5" Apex Series 2-Way Coaxial 4-ohm Car Speakers

51KSC3504 main

Kicker KSC35 (51KSC3504)

200W Peak (100W RMS) 3.5" KS Series 2 Way Coaxial 4-ohm Speakers

4
-11.11%

$79.99

List price $89.99

Club 34F main

JBL Club 34F (JBLSPKCB34F)

150W Peak (50W RMS) 3.5" Club Series 2 Way Coaxial 3-ohm Speakers

4
-27.29%

$79.95

List price $109.95

CF-350mt main

JL Audio CF-350mt

70W RMS 3.5" CF Series Custom-Fit Midrange 4-ohm Tweeters

4
P132 main

Rockford Fosgate Punch P1 P132

80W Peak (40W RMS) 3.5” Punch Series 2 Way Coaxial 4-ohm Speakers

43
REF3032CFXAM main

Infinity Reference 3032cfx (REF3032CFXAM)

150W Peak (50W RMS) 3.5" Reference Series 2-Way Coaxial 3-ohm Car Speakers

14
-42.32%

$74.95

List price $129.95

Limited time!
46CSC354 main

Kicker CSC35 (46CSC354)

180W Peak (60W RMS) 3.5” CS Series 2 Way Coaxial 4-ohm Speakers

16
-30.71%

$51.96

List price $74.99

CF-275mt main

JL Audio CF-275mt

60W RMS 2.75" CF Series Custom-Fit Midrange 4-ohm Tweeters

12
V3 main

Cerwin-Vega V3

360W Peak (120W RMS) 3" Vega Series 2025 Edition 2-Way Coaxial 4-ohm Speakers

Description


MB Quart brand icon

Authorized dealer

MB Quart FA1-900.5

MB Quart Formula series five channel car audio amplifier featuring innovative sound quality and power technology to run four full range channel and a subwoofer channel. The FA1-900.5 is a 900 watt 1 ohm stable (channel 5 only) 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. Bass remote is included.

Product Details:

  • FORMULA Series 5-Channel Class A/B + Class D Amplifier
  • RMS Power Output:
    • 500W x 1 @ 1 ohm (Channel 5 only)
    • 100W x 4 + 350W x 1 @ 2 ohm
    • 60W x 4 + 250W x 1 @ 4 ohm
  • The DC Signal Sense switch will allow the amp to turn on when a signal is received on the RCA inputs, so an amplifier remote turn on wire is not needed to turn on the amplifier. This feature can also be turned off.
  • Variable electronic crossovers allow for complete control of the sound
  • FLUID-FETS are painstakingly selected for their ability to efficiently produce power and mimic the sound quality of the highest end home amplifiers.
  • Heavy duty heat-sink efficiently moves heat from the MOSFET where it can be cooled
  • Variable High Pass Crossover 12dB Per Octave(CH1 & CH 2 / CH3 & CH4): 50Hz - 250Hz (Variable)
  • Variable Low Pass Crossover 12dB Per Octave(CH5 Sub): 50Hz - 250Hz (Variable)
  • Bass Boost: 0-12dB
  • Subsonic Filter: 10Hz - 40Hz
  • Variable Voltage: 0.02 - 9V
  • Signal to Noise: >93
  • Frequency Response: 10Hz - 45KHz
  • THD: <0.50%
  • Fusing: 40A x 2
  • Bass knob included
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

MB Quart FA1-900.5 owner’s manual

Best selling similar products

VADM4v2 small

NVX VADM4 v2 (VADM4v2)

• 80 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(41)

$209.99

List price $239.99

NDA6004 small

NVX NDA6004

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(14)

$159.99

List price $215.99

NDA12001 small

NVX NDA12001

• 500 watts x 1 channel @ 4 ohm
• 850 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

(13)

$169.99

List price $239.99

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
60 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
250 watts x 1 channel
RMS Power @ 2 ohms
350 watts x 1 channel
RMS Power @ 1 ohm
500 watts x 1 channel
RMS Power @ .5 ohm
500 watts x 1 channel
Power Specifications - Full Range Channels
Peak Power @ 4 ohms
120 watts x 4 channel
Peak Power @ 2 ohms
200 watts x 4 channel
Power Specifications - Subwoofer Channel
Peak Power @ 4 ohm
500 watts x 1 channel
Peak Power @ 2 ohms
700 watts x 1 channel
Peak Power @ 1 ohm
1000 watts x 1 channel
Peak Power @ .5 ohm
1000 watts x 1 channel
Amplifier Specifications
Amplifier Class
D
Number of Channels
5-Channel
Total Peak Power Output
1800 watts
Total RMS Power Output
750 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
1 ohm
Frequency Response
10 - 45,000 Hz
THD at Rated RMS Power
.5%
Speaker Level Inputs
Yes
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 250 Hz
Subsonic Filter
10 - 40 Hz
Signal-to-Noise Ratio
>93 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
Yes
Fuse Rating
40A x 2 
Total Fuse Rating
80
Strappable
No
Sonic Certified Amplifier
No
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
What is in the box?
WITB: Amplifiers
Amplifier
Wired gain knob (wire separate)
Gain knob wire
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

FA1-900.5

Weight:

5.00lbs

Internal SKU:

fa19005

Internal Product ID:

175053

Customer Ratings & Reviews


MB Quart FA1-900.5 thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

Sort by:

Loading...

Impressed

Very good amp for the money. Running as 5 channel in an F150 pushing 4 Cerwin Vega 6X8's and 2 Cerwin Vega hed 10's. Sub-channel is running at 1 ohm and it is really loud.

By Frankie on April 17, 2020 Checkmark Icon Verified purchase

4 found this helpful


Loved it

Worked as stated very happy with it Would recommend to anyone.

By Ronny on June 1, 2020 Checkmark Icon Verified purchase

1 found this helpful



Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2023 BMW X1

1996 Buick Roadmaster

1998 Dodge Stratus

2025 BMW 5 Series

1989 Cadillac Eldorado

1963 Lincoln Continental

2011 Ford Ranger

2016 Honda Odyssey

2017 Honda Ridgeline

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.