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JL Audio Slash 300/4v3

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

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JL Audio Slash 300/4v3

300W RMS 4-Channel Slash v3 Series Class A/B Full-Range Amplifier

$599.95

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JL Audio Store
JL Audio Slash v3 4-Channel Class A/B Full-Range Amplifier

JL Audio Slash v3 4-Channel Class A/B Full-Range Amplifier

The original Slash amplifier set new performance standards for automotive amplification and became the best-selling premium mobile amplifier in history. The new Slash v3 amplifier is built on this legendary pedigree and technology platform, enhancing it in a variety of key areas; like radically improved thermal performance, a beautiful new black look with powder-coated cast alloy heat sinks and dozens of tweaks aimed at improving performance, flexibility and reliability. JL Audio's Absolute Symmetry Class A/B output circuit employs identical N-Channel MOSFET transistors for push and pull with true buffering from the load impedance. This is accomplished via a patented circuit that reverses the operation of one of the transistors in each pair to achieve absolute power symmetry and extremely low distortion over a wide range of load impedances. Its these improvements that allow the v3 20% more power than the previous generation amplifiers.

With the proper utilization of the R.I.P.S System, the JL Audio Slash 300/4v3 offers a solid 75 watts RMS per channel at any load between 1.5-Ohms to 4-Ohms with any voltage draw between 11V and 14.5V. To smooth out that power to your liking, the amplifier provides a very complete set of signal processing features, including fully variable crossover filters with selectable crossover modes (Off/LP/HP). There is no magic and no guesswork here... just pure technology, refined to the last detail.

Unparalleled Signal Processing

Unparalleled Signal Processing

The 300/4v3 employs two separate, but identical filter sections for its front and rear channel pairs. These sections consist of a x1/x10 Frequency Multiplier, 12dB/24db Filter Slope Selector, Crossover Mode Selector, and a Fully Variable Crossover Filter for ultimate control and flexibility. Its this control and flexibility that allows the 300/4v3 to work well for a multitude of system configurations. Whether you wish to run a traditional 4-Channel Setup, an "Active" Full Range System or a Bi-Amplified System the 300/4v3 has the controls necessary to filter out the unwanted harmful frequencies from your signal.


R.I.P.S. System

R.I.P.S. System

The 300/4v3 employs JL Audio’s exclusive Regulated, Intelligent Power Supply (R.I.P.S.) design. This sophisticated power supply allows the amplifier to produce its optimum power (75 watts x 4) over a wide range of speaker impedances. Unlike conventional amplifiers that require a specific impedance to produce optimum power, the R.I.P.S.-equipped 300/4v3 gives you the freedom to use a variety of subwoofer configurations without sacrificing power output or sound quality. The operation of the R.I.P.S. circuitry is entirely automatic and adjusts itself every time the amplifier is turned on according to the lowest impedance present at the speaker load.

JL Audio Slash v3 Controls

300/4v3 Specifications:


     

     

     
  • Slash v3 Series 4-Channel A/B Full-Range Amplifier
  • RMS Power Ratings Channel (11V-14.5V):
    • 4 ohms: 75 watts x 4 chan.
    • 3 ohms: 75 watts x 4 chan.
    • 2 ohms: 75 watts x 4 chan.
    • 1.5 ohms: 75 watts x 4 chan.
  • Bridged RMS Power Rating (11V-14.5V):
    • Bridged, 3 ohms: 150 watts x 2 chan.
    • Bridged, 4 ohms: 150 watts x 2 chan.
    • Bridged, 6 ohms: 150 watts x 2 chan.
    • Bridged, 8 ohms: 150 watts x 2 chan.
  • Absolute Symmetry™ Class A/B Circuit
  • R.I.P.S. - Regulated, Intelligent Power Supply
  • Pulse width modulation-regulated switching power supply
  • Dual N-Channel MOSFET power supply
  • H-Bridge amplifier topology
  • Powder-coated cast alloy heat sinks
  • LED power/thermal/low-impedance indicators
  • Differential-balanced input type with RCA jack inputs
  • Advanced Rollback Protection monitors the amp's thermal condition
  • 4/3/2 Channel Operation
  • Selectable 2Ch/4Ch Input Mode
  • Speaker level inputs via RCA, JL Audio XD-CLRAIC2-SW required
  • Input sensitivity:
    • Low level: 200mV-2V
    • High level: 800mV-8V
  • State-variable, 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley LPF or HPF

  •  
  • Selectable frequency multiplier: x1/x10
  • Variable crossover filter (x1): 50 - 500 Hz
  • Variable crossover filter (x10): 500 - 5000 Hz
  • Slew Rate: ± 25V/µs
  • Signal to Noise Ration: >108.5 dB
  • Frequency response: 5 - 30,000 Hz (+0, -1 dB)
  • Total Harmonic Distortion: <0.03% @ 4Ω , 20 - 20 kHz
  • Damping Factor: >200 @ 4Ω/50 Hz, >100 @ 2Ω/50 Hz
  • Inline 40A x 1 ANL or MaxiFuse Recommended
  • Dimensions: 13.4"L x 9.25"W x 2.36"H
  • 4-8 AWG +/- & 8-18 AWG 12V Rem terminals
  • 4 gauge OFC power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • 2 Year Manufacturer's Warranty

Check out the JL Audio Slash 300/4v3 Owner's Manual


Product History:

JL Audio 300/4v3 thumbnail
(newest, current model)
JL Audio 300/4v2 thumbnail
(previous model, replaced by JL Audio Slash 300/4v3)
JL Audio 300/4 thumbnail
(previous model, replaced by JL Audio Slash v2 300/4v2)

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

75 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

75 watts x 4 channels
RMS Power @ 1 ohm

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 1 ohm, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

75 watts x 4 channels @ 1.5 ohms
Bridged RMS Power

Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

150 watts x 2 channels @ 3-8 ohms

Amplifier Specifications

Amplifier Series
This designates the series of the amplifier. Many amps are available in a litany of different wattage and channel configurations, but maintain consistent features throughout the product line.
Slash v3 (JL Audio)
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

300 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
1.5 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
3 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.03%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Yes
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
No
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
High-pass (HP)
Full (AP)
High-Pass Crossover Frequency
The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 5000 Hz
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 5000 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
108.5 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
40A X 1 In-Line Fuse Recommended
Strappable
Some amplifiers can be "strapped" together in order to increase the output of a single audio channel. These amplifiers feature RCA preamp outputs, allowing you to pass the signal directly from one amp to the other to ensure consistency.
No
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

No
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Not Tested

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
67%
4 Star
33%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.3
Features
5.0
Design
4.7
Usability
4.7
matt

york, PA

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Very clean

April 12, 2015

this amp is very clean. well worth every penny. I'm using it to power one pair of hertz hi energy 165xl components. running the tweeters with the active crossover. If you're looking for a class a/b amp that is very clean, has a lot of features, and can deliver all day then this is your amp. I recommend this amp to everyone.

Pros: Audiophile sound quality, plenty of power, great control over sound with many features, runs all day without breaking a sweat.

Cons: none

9 of 19 found this helpful

Was this review helpful to you?

Chris

New Orleans, LA

Overall
Durability
Value
Features
Design
Usability
Well built, pricey, lot of features

March 17, 2014

This amp is solid. It is a bit larger and heavier than I expected. It has all the features I need and delivers on performance. It is a bit overpriced, but you are paying for the JL name.

13 of 27 found this helpful

Was this review helpful to you?

ERIC

Canada

Overall
Durability
Value
Features
Design
Usability
decent sound

January 6, 2014

I bought this amp because i wanted to try a class ab amp rather then then the usual class d amp. I would like to see a conventional power supply rather than the switching supply which it has. I would say the sound is warmer and is a decent full range amp. The lack of an internal fuse can be hazardous to some if a correct external fuse is not in place.

15 of 31 found this helpful

Was this review helpful to you?

Accessory Tools and Products

Accessories added

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $79.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

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1/0 AWG Big 3 Upgrade Kit with 100% OFC Wire for Audio Sytems up to 350 Amps

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True 1.0 Farad 20V Capacitor with Digital Read-out, Built-in Distribution Block

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StreetWires ZN7 RCA Interconnect Cable

16.4 ft. of 4-Channel RCA Cable with hyper twist construction, oxygen free copper, and precision machined tips.

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4 Meters (13 ft.) 4-Channel K-Series RCA Audio Interconnect Cable

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NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

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NVX XWS1250 Speaker Wire

50 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

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NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

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Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

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Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

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NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

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XIX2025 Strapping RCA

0.25 Meter (0.86 ft) Hyper-Flex RCA cable w/ Serpentine-Cut Nickel Plated Connectors

Your Price $12.99

SMD DD-1 Distortion Detector

Set the gain of an audio amplifier quickly and accurately

Your Price $149.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

Browse 1 question and 2 answers
Hide answersShow all answers | Sort by
I am trying to narrow down a good quality 4 channel amp. I have had Hifonics mono blocks before, but have never tried their 4 ch. amps. I was looking at the JL 300/4v3, however the price point is a bit high for what I can get at the moment. My question is being that the SNR is 90%, which is fair for the price point, how good is the quality of the audio? If anyone knows or can compare and contrast this with a high end amp like the JL 300/4v3 that would be great too.
Vidsavage on Aug 3, 2014
JL Audio 3004v3
JL Audio 3004v3
Hifonics JUPITER
Hifonics JUPITER
Best Answer: I love the Hifonics 4ch. You won't go wrong with it. As long as you make the installation proper and set it correctly, you should have no problems with anything. The sound is expectacular. Also i advice you put it 0 gage from batterry to amp, make a whole lot of a differrence.
Reply · Report · Jorge P on Aug 4, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

300/4v3

UPC

699440983518

Weight

14.00lbs

Internal SKU

3004v3

Internal Product ID

44214

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: JL Audio Slash 300/4v3

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