Why Shop Sonic Free Shipping Free Tech Support Easy Returns Low Price Guarantee Details
Print

Power Acoustik LFA4-840

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

5.0

(1 review)

Read 1 review

Write a review

The product on this page is discontinued.
  • LFA Series 4-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 80 watts x 4 chan.
    • 2 ohms: 95 watts x 4 chan.
    • Bridged, 4 ohms: 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
Power Specifications - Full Range Channels
RMS Power @ 4 ohms80 watts x 4 channels
RMS Power @ 2 ohms95 watts x 4 channels
RMS Power @ 1 ohmNot Stable
Bridged RMS Power190 watts x 2 channels
Peak Power Output210 watts x 4 channels
Amplifier Specifications
Amplifier ClassAB
Number of Channels4
Total Peak Power Output840 watts
Total RMS Power Output380 watts
Maximum Input Gauge Size4 AWG
Minimum Impedance Unbridged2 ohms
Minimum Impedance Bridged4 ohms
THD at Rated RMS Power0.02%
Speaker Level InputsNo
Preamp Outputs1 pair
Built-in CrossoverLow-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency40 - 250 Hz
Low-Pass Crossover Frequency40 - 250 Hz
Subsonic FilterN/A
Signal-to-Noise Ratio97 dB
Channel SeparationN/A
Bass BoostSelectable 0, 18 dB
Bass/Gain RemoteNo
Fan CooledNo
Fuse Rating40A x 1 
CEA-2006 CompliantNo
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderManufacturer
Customer Review Summary for Power Acoustik LFA4-840
Average Customer Rating is 5.0 out of 5 stars:
5.0
based on 1 Reviews
Share your thoughts with others:
Write a Review
Rating Distribution:
5 star:
.
100%
4 star:
.
0%
3 star:
.
0%
2 star:
.
0%
1 star:
.
0%
what's this?
Average Attributes Rating:
Durability
5.0
Value
5.0
Features
5.0
Design
5.0
Usability
5.0
what's this?
Most Helpful Customer Reviews:
March 16, 2009 GOOD POWER
Review by
Robert from Miramar, FL
Overall
Durability
Value
Features
Design
Usability
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.
Help other customers find the most helpful reviews
Was this review helpful to you?
Yes No
 Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious Share on Buzz
Amplifier Wiring Kits
Get the wires you need to properly install and power your car amp.
 ProductPriceAdd?
Monster Cable BAP300Monster Cable BAP300
8 Gauge Amplifier Installation Power Kit (No RCA Interconnects)		$40.00
Kicker DCK8Kicker DCK8
8 Gauge Amplifier Installation Kit with RCA Interconnect Cable		$47.99
Bass Remote Control
Control the volume level of your bass and amplifier from the front of the vehicle.
 ProductPriceAdd?
Universal Remote Level Bass ControlUniversal Remote Level Bass Control
Controls bass level and frequency via RCA/Interconnect connectors on any amp.		$14.99
Small Universal Remote Level Bass ControlSmall Universal Remote Level Bass Control
The Scosche RLC is a smaller universal bass remote that connects via RCA inputs.		$12.99
Speaker Wire
Improve the sound quality by delivering more power when replacing your factory wiring. High quality speaker will maximize your amplifier investment and system performance.
 ProductPriceAdd?
Kicker XW1220 Speaker WireKicker XW1220 Speaker Wire
12 Gauge Wire - 20 ft. of Dual Twist Speaker Cable with Sleeves for a Clean Install		$24.99
StreetWires SCP1215BL - 12 AWG Speaker WireStreetWires SCP1215BL - 12 AWG Speaker Wire
12 Gauge Wire - 15 ft. of Speaker Cable with Twisted Construction		$19.99
RCA Interconnects
You will need a good set of RCA interconnect cables to connect your amplifier to your head unit. Using high quality cables ensure the best sound possible by reducing unwanted noise interference, providing tight contacts, and utilizing the latest in cable technology.
 ProductPriceAdd?
Kicker 4-Channel RCA Audio Interconnect CableKicker 4-Channel RCA Audio Interconnect Cable
4 Meters (13 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted-Pair, Hyper-Flex Technology		$21.99
Kicker Z-Series RCA Interconnect CableKicker Z-Series RCA Interconnect Cable
19 ft. of 4-Channel RCA cable with dual twisted-pair conductors, hyper-flex technology, and gold plated contacts for maximum signal transfer!		$24.99
StreetWires ZN7 RCA Interconnect CableStreetWires ZN7 RCA Interconnect Cable
16.4 ft. of 4-Channel RCA Cable with hyper twist construction, oxygen free copper, and precision machined tips.		$49.99
Capacitors
Capacitors store energy for the amplifier to use on demand, thereby assisting in the elimination of dimming lights during peak power surges during use.
 ProductPriceAdd?
Raptor C1F ** SPECIAL PRICE **Raptor C1F ** SPECIAL PRICE **
True 1.0 Farad Car Audio Capacitor for up to 1000W Max		$31.99
e2 ECAP1 by Scosche - Mid-Level 1 Farade2 ECAP1 by Scosche - Mid-Level 1 Farad
Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max		$43.99
Rockford Fosgate RFC1D - Top of the Line 1 FaradRockford Fosgate RFC1D - Top of the Line 1 Farad
Digital 1.0 Farad Car Audio Capacitor for up to 1000W Max		$104.99
Installation, Tools & Accessories
With our professional install card, you can have your amp installed by a pro near you, or you can purchase tools and do the install yourself.
 ProductPriceAdd?
StreetWires FB8StreetWires FB8
8 Gauge Firewall Bushing		$4.99
Kicker DB1448 (09DB1448) - Top of the Line!Kicker DB1448 (09DB1448) - Top of the Line!
Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs		$18.99
Professional Installation for your Car Power AmplifierProfessional Installation for your Car Power Amplifier
Covers labor charges through our professional installer network.		$89.99
Testing and Performance
Optimize your system's performance with testing tools such as SPL meters, bass test discs and more!
 ProductPriceAdd?
AutoSound 2000 CD-104AutoSound 2000 CD-104
The ultimate amplifier level setting disc used for evaluation of audio components		$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.		$12.99
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.		$12.99
Related products
e2 E1000 by Scosche
e2 1000W Single Amplifier Wiring Kit • 9.5mm Power/Ground (Equivalent in Strands to Most Other "4 Gauge" kits) • 17' Twisted Hex RCA Interconnect Cables • 17' Power and Ground
$34.99
in stock
More info

Product Summary

Manufacturer: Power Acoustik
Model number: LFA4-840
UPC: 709483028722
Weight: 9.00 lbs
Internal SKU: lfa4840
Internal product ID: 13429

Why Sonic Electronix?

February caption contest - win a Powerbag!

Customer Testimonial

I purchased a replacement for my broken 6x9 speaker and I was really surprised how quick the delivery time was.Not to mention that their prices are very affordable with shipping included.I highly recommend Sonic Electronics for consumers.Thanks a bunch!

- Carlos from milpitas,california

See more…

Recently Viewed Items

lfa4840 thumbnail

Dual 12" Ported Bandpass MDF Subwoofer Enclosure

lfa4840 thumbnail

Wireless Bluetooth Stereo Headphones (89335N)

lfa4840 thumbnail

6-Channel Electronic Crossover