Garage
Shop

See all parts that fit your 2017 Model S

Crossfire C3 704

400W C3 Series 4-Channel Class A/B Car Amplifier

Crossfire
Shop all Crossfire
Product videos
highlight-star-icon

C3 Series 4 Channel Car Amplifier • 70W RMS @ 4 Ohm x 4 Channels • 100W RMS @ 2 Ohm x 4 Channels • 160W RMS @ 4 Ohm Bridged x 2 Channels • Variable Low-Pass Crossover • Variable High-Pass Crossover • Variable Bass Boost

Learn more about the c3704

We apologize

This item has been discontinued

NVX - Worth the Envy - Direct to Consumer Car Audio

Loading...
82-8603 main

Metra 82-8603 Speaker Adapter Plates

Install 6.5” aftermarket speakers in select 2012-2022 Model S

-43.35%

$16.99

List price $29.99

72-8604 main

Metra 72-8604

Install New Speakers in select 2012-2024 vehicles from Tesla

-16.68%

$14.99

List price $17.99

NSH-8604 main

NVX NSH-8604

Install New Speakers in select 2012-2024 vehicles from Tesla

-38.49%

$7.99

List price $12.99

Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

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

124
-33.36%

$79.96

List price $119.99

XBAF65 main

NVX XBAF65

Universal 6.5" Waterproof Silicone Rubber Speaker Baffle Ring Kit (Pack of 2)

117
-37.15%

$21.99

List price $34.99

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

XSP652 main

NVX XSP652

600W Peak (200W RMS) 6.5" X-Series 2 Way Coaxial Car Speakers

19
-33.34%

$119.99

List price $179.99

Limited time!
CST20 main

Kicker CST204 (46CST204)

200W Peak (100W RMS) 3/4” CS Series 4-ohm Titanium Dome Tweeters

3
-30.04%

$55.96

List price $79.99

Product Highlights


C3 Series 4 Channel Car Amplifier • 70W RMS @ 4 Ohm x 4 Channels • 100W RMS @ 2 Ohm x 4 Channels • 160W RMS @ 4 Ohm Bridged x 2 Channels • Variable Low-Pass Crossover • Variable High-Pass Crossover • Variable Bass Boost

Description


Saving Space with Crossfire's C3 Series Amplifiers

Just bought four brand new after market speakers that require an amplifier but are limited to space? The C3 704 by Crossfire is the perfect solution to your dilemma. The amplifier is rated at 70 watts RMS @ 4 ohms x 4 channels, 100 watts RMS @ 2 ohms x 4 channels, and 160 watts RMS x 2 channels at the bridged impedance of 4 ohms. Gain complete control of your car audio system with the variable low-pass and high-pass crossover features. If you don't have an after market radio, no need to worry the high-level speaker inputs make this amplifier compatible with any system. So if you are looking for a dependable amplifier, with sufficient power and that can be mounted underneath your seat, then the C3 704 is the best option for you.

  • C3 Series 4 Channel Class A/B Car Amplifier
  • RMS Power Rating(13.8V):
    • 4 ohm: 70 watts x 4 chan.
    • 2 ohm: 100 watts x 4 chan.
    • Bridged, 4 ohm: 160 watts x 2 chan.
  • MOSFET power supply
  • 2 Ohm stable stereo / 4 ohm mono
  • Variable Bass Boost (0 to +12 dB)
  • 4/3/2 Channel operation
  • 2-Way System Protection circuitry
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • Heavy duty heatsink for extreme heat dissipation
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Input sensitivity:
    • Low level: 0.15V-8V
  • Variable high-pass filter (50-500 Hz)
  • Variable low-pass filter (50-500 Hz)
  • Frequency response: 20-20,000 Hz)
  • Dimensions: 14-7/16"L x 7-1/8"W x 1-13/16"H
  • 8 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
  • 1-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

124
-33.36%

$79.96

List price $119.99

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

43DSC6504 main

Kicker DSC650 (43DSC6504)

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

28
-10.53%

$84.99

List price $94.99

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

12
-9.16%

$109.00

List price $119.99

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

PNW-65CS2 main

AudioControl PNW-65CS2

250W Peak (200W RMS) 6.5″ PNW Series 2 Way Component 3-ohm Speakers

4
-5.90%

$319.00

List price $339.00

REF6532IXAM main

Infinity Reference REF6532IXAM

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

3
-20.01%

$119.95

List price $149.95

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

MPK 163.3 main

Hertz MPK163.3

600W Peak (300W RMS) 6.5" Mille PRO Series 3-way 4-ohm Component Speaker System

2
-14.89%

$999.99

List price $1175.00

SXE-1726S main

Alpine SXE-1726S

440W Peak (80W RMS) 6.5" SXE Series 2-way 4-ohm Coaxial Car Speakers

13
-21.82%

$42.99

List price $54.99


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

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

(25)

$279.99

List price $335.99

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

(28)

$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

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

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

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

MDX2000.4 2 Ohm small

PRV Audio MDX2000.4 2 Ohm

• 330 watts x 4 channel @ 4 ohm
• 500 watts x 4 channel @ 2 ohm
• Bridged: 1000 watts x 2 channel @ 4 ohm
• Total RMS Power: 2000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$219.91

List price $274.89

AP200/4BT small

JL Audio AP200/4BT

• 40 watts x 4 channel @ 4 ohm
• 50 watts x 4 channel @ 2 ohm
• Bridged: 100 watts x 4 channel @ 4 ohm
• Total RMS Power: 200 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$549.99

List price $659.99

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
70 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
RMS Power @ 1 ohm
Not Stable
Bridged RMS Power
160 watts x 2 channel
Amplifier Specifications
Amplifier Class
A/B
Number of Channels
4-Channel
Total RMS Power Output
400 watts
Maximum Input Gauge Size
8 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
2 ohms
THD at Rated RMS Power
0.08%
Speaker Level Inputs
No
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 500 Hz
Signal-to-Noise Ratio
90 dB
Channel Separation
50 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
No
Fuse Rating
25A x 2 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

C3 704

Weight:

6.14lbs

Internal SKU:

c3704

Internal Product ID:

36210

Product and How-to Videos


Customer Ratings & Reviews


Crossfire C3 704 thumbnail image

5 star
50%
4 star
0%
3 star
0%
2 star
50%
1 star
0%



Durability
3.5
Value
3
Features
4
Design
3.5
Usability
4

Customer Reviews

Sort by:

Loading...

Good product but is malfuctioning

I bought this product when it was on discount at Sonic Electronix. The professional who installed the amplifier in my car told me that one of the 4 channels is not working because it was malfuction from the factory. Unfortunately the cost to return it to get fixed, is better to buy a new one. Anyway i took it to a technician to fix it. Currently i have 4 speakers connected to 3 channels and they sound ok. Wouldnt recommend it.

By Mar on June 20, 2012

7 found this helpful


Untouchable value and quality!

Crossfire's quality has always been top notch. The fact that they are selling an amazing amp like the 704/501 for so little is just ridiculous. I am using the 501 to power a single dual voice-coil (2ohm+2ohm) Alpine Type R at 1ohm. Most amps can't even imagine being stable at 1ohm (almost all of em would overheat and fry). The 704 makes my mids and highs sound amazing. I won't need to upgrade for quite some time, but rest assured that when I do, I'll go right back to Crossfire for their new version of these two amps!

By Mo on August 25, 2013

3 found this helpful




CA 41 small

DLS CA 41

500W, 4-Channel Class AB Classic Series Car Amplifier (Performance Classic -- 10-30241)

$299.95

List price $389.95

BHD3F small

Boss BHD3F

2-Speaker System Upgrade Kit for select 1998-2013 vehicles from Harley Davidson Includes Two 6.5" Front Speakers and 4-Channel Amplifier

$400.00

List price $849.99

CVR102 small

Kicker CompVR CVR102 (43CVR102)

700W Peak (350W RMS) 10" Comp VR Series Dual 2-ohm Subwoofer

(8)

$119.99

List price $139.99

OEM-2 small

PAC OEM-2

Four Channel Premium Line Output Converter

$29.95

List price $49.95

ACC-USB-RAM small

iDataLink Maestro ACC-USB-RAM USB Adapter

Connect Factory USB Port to Aftermarket Car Stereo in select 2013-2017 2500 and 3500 and 1500

(3)

$29.99

List price $37.99

MPQ-6XO small

Soundstream MPQ-6XO

Parametric EQ w/ Crossover and Sub Volume

$89.99

List price $159.99

BA460 small

Bazooka BA460

600W Max (350W RMS), 4-Channel Car Amplifier

(5)

$89.99

List price $279.99

CW750 small

Boss CW750

1600W Max, Chaos Wired Series 2-Channel Amplifier with Remote Level Control

$99.99

List price $319.99

BX-10X small

Soundstream BX-10X

Digital Bass Reconstruction Processor with Lighted Display and Remote Control

(4)

$69.99

List price $119.99

Related Searches


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

2017 Tesla Model S

2011 Ram 4500

2006 Ford Taurus

2003 Dodge Caravan

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.