Garage
Shop

See all parts that fit your 2025 Frontier

Power Acoustik LFA4-840

840W Max, 4-Channel LFA Series (Loud Freeking Amplifiers) Amplifier

Product videos
highlight-star-icon

LFA Series 4-Channel Class AB Car Amplifier • 80W x 4 chan. @ 4 ohm • 95W x 4 chan. @ 2 ohm • 190W x 2 chan. @ 4 ohm • 210W x 4 chan. Max • Preamp RCA outputs

Learn more about the lfa4840

We apologize

This item has been discontinued

NVX - Worth the Envy - Direct to Consumer Car Audio

Loading...
MP69 main

DS18 MP69

Adapts 6x9" Speaker Space to 6.5" Speaker and 1.38" Tweeter

2
GX608C main

JBL GX608C (GX608CAM)

420W Peak (140W RMS) 6.5” GX Series 2 Way 2.3-ohm Component Speaker System

7
XBAF69 main

NVX XBAF69

Universal 6x9" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)

48
-42.51%

$22.99

List price $39.99

FRING65 main

NVX FRING65

Universal 6.5" or 6.75" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

44
-10.01%

$17.99

List price $19.99

PNW1 main

AudioControl PNW1

125W RMS 1" PNW Series Component Car Tweeters

3
-13.42%

$129.00

List price $149.00

NSP65KIT main

NVX NSP65KIT

600W Peak (200W RMS) 6.5" N-Series 2 Way Component Car Speakers

6
-16.67%

$89.99

List price $107.99

TS-A1681F main

Pioneer TS-A1681F

700W Peak (160W RMS) 6.5" A-Series 4-Way Coaxial 4-ohm Speakers

3
-15.39%

$109.99

List price $130.00

FRING69 main

NVX FRING69

Universal 6x9" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

13
-20.01%

$15.99

List price $19.99

NSP69KIT main

NVX NSP69KIT

920W Peak (320W RMS) 6x9" N-Series 2 Way Component Car Speakers

1
-16.67%

$109.99

List price $131.99

TS-A6971F main

Pioneer TS-A6971F

1200W Peak (200W RMS) 6x9" A-Series 4-Way Coaxial 4-ohm Speakers

2
-15.38%

$110.00

List price $130.00

Product Highlights


LFA Series 4-Channel Class AB Car Amplifier • 80W x 4 chan. @ 4 ohm • 95W x 4 chan. @ 2 ohm • 190W x 2 chan. @ 4 ohm • 210W x 4 chan. Max • Preamp RCA outputs

Description


Power Acoustik brand icon

Authorized dealer

  • LFA Series 4-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohm: 80 watts x 4 chan.
    • 2 ohm: 95 watts x 4 chan.
    • Bridged, 4 ohm: 190 watts x 2 chan.
  • Max power output: 210 watts x 4 chan.
  • Pulse-width modulated MOSFET power supply
  • LED power and protection indicators
  • Selectable Bass EQ (0,18 dB bass boost)
  • Tri-mode capable
  • Preamp RCA outputs
  • Adjustable sensitivity range: 0.2V - 6V
  • Heavy duty shinny jet-black aluminum heatsink with diamond cut ribs
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Variable high-pass filter (40-250 Hz)
  • Variable low-pass filter (40-250 Hz)
  • Frequency response: 10-30000 Hz
  • Dimensions: 9.7"L x 10.27"W x 2.36"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • Authorized Internet Dealer
  • 2-year Manufacturer's warranty

Loading...
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

254
-33.36%

$79.96

List price $119.99

Limited time!
46CSC6934 main

Kicker CSC693 (46CSC6934)

900W Peak (300W RMS) 6x9” CS Series 3 Way Coaxial 4-ohm Speakers with Integrated Midrange Speakers

40
-30.02%

$111.96

List price $159.99

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

214
-9.16%

$109.00

List price $119.99

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

72
-10.53%

$84.99

List price $94.99

SXE-6926S main

Alpine SXE-6926S

280W Peak (90W RMS) 6x9” SXE Series 2-way 4-ohm Coaxial Speakers

13
-20.84%

$56.99

List price $71.99

XED62 main

Cerwin-Vega XED62

600W Peak (70W RMS) 6.5" XED Series 2-Way Coaxial 4-ohm Speakers

15
-16.67%

$49.99

List price $59.99

R169X2 main

Rockford Fosgate Prime R169X2

260W Peak (130W RMS) 6x9" Prime Series 2 Way Coaxial 4-ohm Speakers

49
NSP65 main

NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

93
-35.19%

$69.99

List price $107.99

GX608C main

JBL GX608C (GX608CAM)

420W Peak (140W RMS) 6.5” GX Series 2 Way 2.3-ohm Component Speaker System

7

Best selling similar products

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

(22)

$159.99

List price $215.99

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

(111)

$209.99

List price $239.99

RD400/4 small

JL Audio RD400/4

• 75 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

(44)

$304.99

List price $379.99

MFA 4.220 small

Deaf Bonce MFA 4.220

• 220 watts x 4 channel @ 4 ohm
• 330 watts x 4 channel @ 2 ohm
• Bridged: 660 watts x 2 channel @ 4 ohm
• Total RMS Power: 1320 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$289.90

List price $289.90

MFA 4.180 small

Deaf Bonce MFA 4.180

• 180 watts x 4 channel @ 4 ohm
• 270 watts x 4 channel @ 2 ohm
• Bridged: 540 watts x 2 channel @ 4 ohm
• Total RMS Power: 1080 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$259.90

List price $259.90

JD400/4 small

JL Audio JD400/4

• 75 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

(34)

$299.99

List price $299.99

VAD10004v2 small

NVX VAD10004 v2 (VAD10004v2)

• 150 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(117)

$279.99

List price $335.99

R2-500X4 small

Rockford Fosgate Prime R2 R2-500X4

• 75 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

(10)

$359.99

List price $359.99

MVPA4 small

NVX MVPA4

• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(70)

$279.99

List price $383.99

CXA360.4 small

Kicker CXA360.4 (46CXA3604T)

• 65 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 180 watts x 2 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

(16)

$229.99

List price $249.99

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
80 watts x 4 channel
RMS Power @ 2 ohms
95 watts x 4 channel
RMS Power @ 1 ohm
Not Stable
Bridged RMS Power
190 watts x 2 channel
Amplifier Specifications
Amplifier Class
A/B
Number of Channels
4-Channel
Total Peak Power Output
840 watts
Total RMS Power Output
380 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
0.02%
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
40 - 250 Hz
Low-Pass Crossover Frequency
40 - 250 Hz
Signal-to-Noise Ratio
97 dB
Bass Boost
Selectable 0, 18 dB
Remote bass/level controller
No
Fuse Rating
40A x 1 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

LFA4-840

Weight:

9.00lbs

Internal SKU:

lfa4840

Internal Product ID:

13429

Product and How-to Videos


Customer Ratings & Reviews


Power Acoustik LFA4-840 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...

GOOD POWER

I INSTALLED THIS AMP AND ALL PIONEER SPEAKERS IN MY SUPERCREW F150 AND IT BANGS! THE BASS IS CLEAN AND KEEPS UP WITH THE SOUND. WILL BUY ANOTHER ONE TO RUN MY 12" WHEN I INSTALL IT.

By Robert on March 16, 2009

2 found this helpful




SGBS0004306 small

LG HBM-530 (SGBS0004306)

Sparkling Triangle Bluetooth Headset Studded w/ Swarovski Crystals and e-Clip Ergonomic Ear Bud

$55.99

List price $99.99

LC-1.1500, XKIT02 small

AudioControl LC-1.1500 + NVX Premium 1/0 Gauge Amp Wiring Kit

1500W Max (850W RMS) LC Series Monoblock Amplifier w/ AccuBASS

(45)

$699.00

List price $1176.99

DDA-100 Silver small

NuForce DDA-100 (DDA100) Audiophile Grade Integrated Amplifier & DAC - Silver

Home Audio/Computer Amplifier Digital-to-Analog Converter w/ USB, Optical, & 2 Digital Coaxial Input

(1)

$549.00

List price $549.95

D-5.1300, XKIT46 small

Audio Control D-5.1300 + Free NVX Premium 4 Gauge Amp Wiring Kit

5-Channel Amplifier with DSP (Digital Sound Processor) + Premium NVX XKIT46

(46)

$919.18

List price $2958.99

ICON-AMP-BLUE small

NuForce Icon Amp Blue (NF-ICON-AMP-BLUE) Stereo Amplifier

Stereo Amplifier with Two 24W Outputs and RCA

$139.95

List price $189.00

ICON2-BLUE small

NuForce Icon-2 Blue (ICON2-BLUE) Desktop Headphone Amplifier and DAC

24-Watt Output, 3.5mm Input, USB DAC with 24-Bit/96KHz and RCA Inputs

$299.95

List price $349.00

ICON2-SILVER small

NuForce Silver Icon-2 (ICON2-SILVER) Headphone Amplifier and DAC

24-Watt Output, 3.5mm Input, USB DAC with 24-Bit/96KHz and RCA Inputs

$349.00

List price $349.00

CDX-GT575UP_99-9600_ASWC-1 small

Sony 1998-2013 Harley Davidson Stereo & Installation Accessories Combo

Sony CDX-GT570UP Stereo with Installation Kit and Handlebar Thumb Controls

(78)

$200.01

List price $314.97

ICON-AMP-BLACK small

NuForce Icon Amp Black (NF-ICON-AMP-BLACK) Stereo Amplifier

Stereo Amplifier with Two 24W Outputs and RCA Inputs

(2)

$139.95

List price $189.00

Related Searches


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

2025 Nissan Frontier

1999 BMW 328i

2018 Lexus GS F

2015 Nissan Armada

2024 Lincoln Nautilus

2004 Mitsubishi Montero

2018 Ford Fusion

1978 Lincoln Mark V

2004 Honda Pilot

2012 Acura TL

Vehicle
Store
Delete

2002 Harley Davidson FXDWG Dyna Wide Glide

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.