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Boss CX1800

1800W Max 5-Channel Chaos Exxtreme Series Amplifier (CX-1800)

Discontinued
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This item has been discontinued

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Boss CXX2705

OUR PRICE: $129.95

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  • Chaos Exxtreme 5-Channel Class AB Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 120 watts x 4 chan. + 200 watts x 1 chan.
    • Bridged, 4 ohms: 600 watts x 2 chan. + 600 watts x 1 chan.
  • Max power output: 300 watts x 4 chan. + 600 watts x 1 chan.
  • Pulse width modulated MOSFET power supply
  • Wired remote bass level control included
  • LED power indicators
  • Tuned Bass EQ (0-18 dB bass boost)
  • Bridgeable operation
  • Input voltage sensitivity selector
  • Speaker-level inputs with soft turn-on
  • Remote turn-on/off circuit
  • Thermal and short circuit protection circuitry
  • Variable gain control
  • Silver anodized aluminum heatsink
  • Chrome-plated RCA level inputs
  • Chrome-plated screw terminals
  • Fixed high-pass filter (200 Hz)
  • Variable low-pass filter (35-160 Hz)
  • Frequency response: 9-50000 Hz
  • Dimensions: 19-15/16"L x 11-7/8"W x 2-5/8"H
  • 4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

Boss CXX2705 thumbnail
(newest, current model)
Boss CX1800 thumbnail
(previous model, replaced by Boss CXX2705)

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.

120 watts x 4 channels
Peak Power Output
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison.

600 watts x 2 channels

Power Specifications - Subwoofer Channel

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 speaker(s) or subwoofer(s) 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. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
200 watts x 1 channels
Peak Power Output
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage. Often times this maximum is achieved during a brief musical burst, such as a drum accent or low bass hit. Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. This is the peak power output for the amplifier's 5th channel.
600 watts x 1 channels

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.
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.
5
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

1800 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.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 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.
0.01%
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.

Fixed (200 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.

35 - 160 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.
103 dB
Bass Boost
The objective of the bass boost is to get more kick out of your subwoofer. It is a circuit that emphasizes the lower frequencies at a given point. The bass boost should always be set first before setting the gain. This feature is known for destroying subwoofers and is commonly used incorrectly, so be cautious.
0 - 18 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.
Yes
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.
60A x 1 
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
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.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
6 years
Labor Warranty Duration
6 years
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
85%
4 Star
0%
3 Star
15%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.3
Value
4.6
Features
4.6
Design
4.4
Usability
4.7

jsett

Cleveland, Oh

Overall
Durability
Value
Features
Design
Usability

Great Amp, Great price, Perfect Configuration

April 14, 2011

I have owned my CX1800 for 4yrs. now, and I am very pleased. I am running Sony Explode 6x9's in the rear deck and Boss Audio 6" 2-way separates in my Century doors and a Pioneer 12" sub in the trunk. I thought the best solution would be a single 5Ch. amp- IF it had enough power and decent specs. The CX1800 was just the right solution. It packs 120WRMS x 4 into 4 Ohms- more than enough to drive the front and back speakers cleanly. And 200WRMS into 4 Ohms for the sub- again plenty or power. I was drawn to this amp (really not even being familiar with the Boss brand) strictly by the specs and 5ch. package of this amp. It has all the necessary features one needs to set-up a 5Ch. system like high & low pass crossovers, bass boost and a remote for the bass level if your head unit doesn't have a separate control for a sub. It's built like a tank. The sound is clean and accurate(my main concern) and can get more than loud enough for those volume junkies. My only complaint is that channels 1-4 only have a +18db switch for Bass Boost. This is way too much of a boost to be useful. +3db or +6db would have been more realistic. It should have been a Variable Control like it is for the 5th channel on this amp. With a sub you really don't need this switch anyway. It's a great value! I'm now a big Boss Audio fan.

2 of 2 found this helpful

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Kevin

Loveland, CO

Overall
Durability
Value
Features
Design
Usability

Great value, and very tough!

May 14, 2012

My dad bought this amp when we rebuilt our pontoon 2 winters ago. It runs a 12" Sony sub and four 6x9 Polk Audio speakers. It ROCKS. The stereo will make your ears ring. This amp has not missed a beat, and is exposed to wind, some rain, splashes, and extreme cold (we don't take it off the boat during winter storage, and our boat sits outside). It's definitely an attention getter. I'm very tempted to buy one for my own truck.

0 of 0 found this helpful

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Tank from Texas

Laredo, Texas

Overall
Durability
Value
Features
Design
Usability

Good while it lasted.

August 30, 2011

This amp powered one JLw0 and 6.5" db drive component speakers on my 2003 silverado z71 and lasted a little under a year before it went out. It sounded great and I really liked the five channel option on it but it was just not durable enough for me. Still a descent sounding amp for the money, perhaps I got a bad one.

0 of 0 found this helpful

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Bernard

Denver Co

Overall
Durability
Value
Features
Design
Usability

Hooked, now for the last thing left to get.....

June 18, 2011

First of all this amp is massive!! However I hooked it up and got it tuned and now am deaf! Not really but this thing blew my mind. I used to install stereos back in the day with the EQ power booster. This was so simple just get nothing less than 4 gauge and do the BIG 3 with the same and..... well if you are not getting this now what is your wait? Boss amp fan for life, now if I can find a in dash DVD I like then I will be set.

0 of 0 found this helpful

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till

Australia

Overall
Durability
Value
Features
Design
Usability

boss cx1800

May 31, 2011

Product was great, nill issues with delivery or payment.. top product, would recommend to the serious audio installment team.

0 of 0 found this helpful

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willison

Canada

Overall
Durability
Value
Features
Design
Usability

Best amp for less money..

April 16, 2011

I have had this amp for a few months now. great amp. for the job I was looking to do.

0 of 0 found this helpful

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javierockz

bayshore new york

Overall
Durability
Value
Features
Design
Usability

boss cx1800

November 11, 2010

It gets the job done if you have a budget ... I got a five channel but channel 3 and 4 didnt work ! I had to piggy back 3 and 4 into channel 1 and 2 . it still sounded great, but this isn't recommended to do. I would recommend, but only if you are on a budget! pros- good sound cons- cheap quality

0 of 0 found this helpful

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brandon

clayton, NC

Overall
Durability
Value
Features
Design
Usability

great ammp

August 13, 2010

I have had this amp for about a year now. Great amp. Never overheats, looks great, and plenty of bang for your buck!!

0 of 0 found this helpful

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brandon

clayton, nc

Overall
Durability
Value
Features
Design
Usability

great amp

February 25, 2010

i have had this amp for a few months now. t powers 2 kicker subs and 4 hifonics component speakers and it makes the whole car shake. it gives crazzzzzzy volume. i would definitely recommend this amp

0 of 0 found this helpful

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vincent

east moriches, NY

Overall
Durability
Value
Features
Design
Usability

just what i needed

December 24, 2009

I wouldn't buy anything else. and it gets a beating with my off-roading, moisture without having a top on the jeep and volume always turned up.

0 of 0 found this helpful

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Tank

Texas

Overall
Durability
Value
Features
Design
Usability

Boss CX1800 - best amp for the money.

September 17, 2009

I'm powering db drive 6.5" and 5.25" component speakers and one 12" JL audio sub on my 03 silverado ext cab z71 with this amp and it sounds great. The only thing you have to worry about is routing the wires properly and getting a good ground point or you will get the infamous whining ground loops. Oh yeah, and the amp is huge, but if you dont care about space, this is a great amp for the price!

0 of 0 found this helpful

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Kgnismo

Pflugerville, TX

Overall
Durability
Value
Features
Design
Usability

Pretty good for being non-hype brand

August 22, 2009

Have Infinity Kappa 4", reference 6x9 and reference 6.5 and reference 10" sub. This powers it all and I don't have it turned up much at all!!! Very good sound but i am troubled b/c the shop that installed my items didn't run the cables clean. Had 4 different LOCsb/c of them. Slight hiss and distortion but I think its the route of the power cable vs speaker wires. Great looking and bass knob isn't one shown here in site, but works good.

0 of 0 found this helpful

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RJ

AUSTIN, TX

Overall
Durability
Value
Features
Design
Usability

Boss CX 1800 - Best Bang for your Buck!

February 26, 2009

I put in in my jeep, running all Polk Momo speakers and a 10in sub. Great power, clear sound, not a single problem. I wouldn't buy anything else. and it gets a beating with my off-roading, moisture without having a top on the jeep and volume always turned up.

0 of 0 found this helpful

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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

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $149.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

StreetWires FB8

8 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

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

Your Price $17.99

Professional Installation for your Car Power Amplifier

Covers labor charges through our professional installer network.

Your Price $89.99

Stinger SI4617 4000 Series Interconnect Cable

17 ft. 6-Channel 4000 Series Audio Interconnect Cable

Your Price $41.99

NVX XWS1650 Speaker Wire

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

Your Price $29.99

NVX XWS1625 16 AWG Speaker Wire

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

Your Price $13.99

Belva BBSW127 12 AWG Speaker Wire

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

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

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

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

AutoSound 2000 CD-102

High Frequency Test CD specifically designed for the set-up and evaluation of sound system imaging and placement.

Your Price $11.99

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Product Summary

Manufacturer

Model Number

CX1800

UPC

791489107945

Weight

19.00lbs

Internal SKU

cx1800

Internal Product ID

11594

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: Boss CX1800