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1974 Jaguar XJ12

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Use our shopping filters to find the right 2/3/4-channel amp to power upgraded speakers properly.

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Amps for Adding Speakers for 1974 Jaguar XJ12

Some vehicles require an amp bypass module, a line-output converter like the NVX XLCA2 or AudioControl LC2i, or a DSP to integrate with your factory radio and avoid bass roll-off. Bass roll-off occurs when a factory radio's crossover is designed only for the original equipment speakers, resulting in a not complete signal being sent to your new aftermarket amp.

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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.
Amplifier Key Features
Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
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.
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.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
4,
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.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
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.
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.
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.
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.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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Kicker KEY200.4 (47KEY2004)

200W RMS KEY Series 4-Channel Smart Amplifier with Automatic EQ and Processor

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Kicker KEY200.4 (47KEY2004)

200W RMS KEY Series 4-Channel Smart Amplifier with Automatic EQ and Processor

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

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List price $329.99
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• 50 watts x 4 channel @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 200 watts
• Class 4 ohm Stable 4-Channel Amplifier

Alpine OPTIM8 PXE-C80-88

900W RMS Class D PXE Series 8 Channel Car Amplifier with Automatic Sound Tuning

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Alpine OPTIM8 PXE-C80-88

900W RMS Class D PXE Series 8 Channel Car Amplifier with Automatic Sound Tuning

• 50 watts x 6 channel + 150 watts x 2 channel @ 4 ohm
• 50 watts x 6 channel + 300 watts x 2 channel @ 2 ohm
• Total RMS Power: 900 watts
• Class D 4 ohm Stable 8-Channel Amplifier

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List price $1200.00
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• 50 watts x 6 channel + 150 watts x 2 channel @ 4 ohm
• 50 watts x 6 channel + 300 watts x 2 channel @ 2 ohm
• Total RMS Power: 900 watts
• Class D 4 ohm Stable 8-Channel Amplifier

AudioControl A1100.5

1100W RMS Class D Altitude Series 5-Channel Car Amplifier with ParaBASS Control Knob

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AudioControl A1100.5

1100W RMS Class D Altitude Series 5-Channel Car Amplifier with ParaBASS Control Knob

• 90 watts x 4 channel + 400 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 4 ohm Stable 5-Channel-Channel Amplifier

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List price $779.00
-36% $499.00

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Sound Extreme by ECOXGEAR SEI-AMP30041

300W RMS Class D 4 Channel High Definition Marine and Powersports Amplifier

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Sound Extreme by ECOXGEAR SEI-AMP30041

300W RMS Class D 4 Channel High Definition Marine and Powersports Amplifier

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

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List price $399.99
-23% $309.99

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

JBL APEX PA454

450W Peak (180W RMS) Class D Apex Series Compact 4-Channel Marine and Powersports Amplifier

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JBL APEX PA454

450W Peak (180W RMS) Class D Apex Series Compact 4-Channel Marine and Powersports Amplifier

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

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List price $299.95
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• 45 watts x 4 channel @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 180 watts
• Class D 4 ohm Stable 4-Channel Amplifier

Sound Extreme by ECOXGEAR SEI-AMPEV30041

300W RMS Class D EV Series 4 Channel Marine Amplifier

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Sound Extreme by ECOXGEAR SEI-AMPEV30041

300W RMS Class D EV Series 4 Channel Marine Amplifier

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

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

Hertz HP 802

1800W RMS Class AB HP Series 2-Channel Full Range Car Amplifier

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Hertz HP 802

1800W RMS Class AB HP Series 2-Channel Full Range Car Amplifier

• 330 watts x 2 channel @ 4 ohm
• 550 watts x 2 channel @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 1800 watts
• Class A/B 4 ohm Stable 2-Channel Amplifier

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List price $870.00
-8% $799.99

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Deaf Bonce Machete MFA-5.1000

480W RMS Class D Machete Series 5-Channel Car Amplifier

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Deaf Bonce Machete MFA-5.1000

480W RMS Class D Machete Series 5-Channel Car Amplifier

• 80 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 120 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 240 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 480 watts
• Class D 4 ohm Stable 5-Channel-Channel Amplifier

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Available Offers (2) for Deaf Bonce Machete MFA-5.1000
FREE Belva Amp Kit at Checkout!
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Save 30% off an NVX XKIT46 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT46 Amp Kit! No code needed — discount applies automatically at checkout.
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DS18 MP.4A

480W Peak (160W RMS) Class D HYDRO Series 4-Channel Marine and Powersports Amplifier

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DS18 MP.4A

480W Peak (160W RMS) Class D HYDRO Series 4-Channel Marine and Powersports Amplifier

• 40 watts x 4 channel @ 4 ohm
• Total RMS Power: 160 watts
• Class D 4 ohm Stable 4-Channel Amplifier
• IPX5 waterproof rating with salt and fog protection

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• 40 watts x 4 channel @ 4 ohm
• Total RMS Power: 160 watts
• Class D 4 ohm Stable 4-Channel Amplifier
• IPX5 waterproof rating with salt and fog protection

DS18 Hydro NXL-F4

640W Peak Class D HYDRO Series 4-Channel Marine and Powersports Flush Mount Amplifier

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DS18 Hydro NXL-F4

640W Peak Class D HYDRO Series 4-Channel Marine and Powersports Flush Mount Amplifier

• 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: 640 watts
• IPX67 waterproof rating
• Class D 4 ohm Stable 4-Channel-Channel Amplifier

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Rockford Fosgate M2-300X4 + FREE $75 Gift Card

300 Watt 4-channel marine amplifier

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Rockford Fosgate M2-300X4 + FREE $75 Gift Card

300 Watt 4-channel marine amplifier

• 50 Watts x 4 @ 4 ohm<
• 75 Watts x 4 @ 2 ohm
• 150 Watts x 2 @ 4 ohm Bridged/Mono
• 4-Channel Marine Amplifier
• Top Mounted Control Panel
• 2/4 channel input switch

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• 50 Watts x 4 @ 4 ohm<
• 75 Watts x 4 @ 2 ohm
• 150 Watts x 2 @ 4 ohm Bridged/Mono
• 4-Channel Marine Amplifier
• Top Mounted Control Panel
• 2/4 channel input switch

Rockford Fosgate M2-300X4 with Amplifier Wiring Kit

300 Watt 4-channel marine amplifier

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Rockford Fosgate M2-300X4 with Amplifier Wiring Kit

300 Watt 4-channel marine amplifier

• 50 Watts x 4 @ 4 ohm<
• 75 Watts x 4 @ 2 ohm
• 150 Watts x 2 @ 4 ohm Bridged/Mono
• 4-Channel Marine Amplifier
• Top Mounted Control Panel
• 2/4 channel input switch

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• 50 Watts x 4 @ 4 ohm<
• 75 Watts x 4 @ 2 ohm
• 150 Watts x 2 @ 4 ohm Bridged/Mono
• 4-Channel Marine Amplifier
• Top Mounted Control Panel
• 2/4 channel input switch

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Rockford Fosgate R2-200X2 + Belva BAK42 4 Gauge Amp Kit

Prime Series 200W RMS Class D 2-Channel Amplifier + Belva 4 Gauge Wiring Kit

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Rockford Fosgate R2-200X2 + Belva BAK42 4 Gauge Amp Kit

Prime Series 200W RMS Class D 2-Channel Amplifier + Belva 4 Gauge Wiring Kit

• 50 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• 200 Watts RMS x 1 Bridged @ 4 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• On Board Punch EQ

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• 50 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• 200 Watts RMS x 1 Bridged @ 4 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• On Board Punch EQ

JBL Apex PA454 with Belva 8 Gauge Amp Kit

180W RMS Apex Series Class-D Compact 4-Channel Powersports Amplifier

APEXPA454_BAK84 big
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JBL Apex PA454 with Belva 8 Gauge Amp Kit

180W RMS Apex Series Class-D Compact 4-Channel Powersports Amplifier

• 45 watts x 4 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 4 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 45 watts x 4 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 4 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Sound Extreme by ECOXGEAR SEI-AMPEV30041 with NVX 8 Gauge Amp Kit

300W RMS EV Series Class-D 4-Channel Amplifier

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Sound Extreme by ECOXGEAR SEI-AMPEV30041 with NVX 8 Gauge Amp Kit

300W RMS EV Series Class-D 4-Channel Amplifier

• 74 watts x 4 channel @ 4 ohm
• Bridged: 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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List price $507.98
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• 74 watts x 4 channel @ 4 ohm
• Bridged: 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Sound Extreme by ECOXGEAR SEI-AMP30041 with NVX 8 Gauge Amp Kit

300W RMS Class-D 4-Channel High Definition Marine Amplifier

A30041_XKIT84 big
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Sound Extreme by ECOXGEAR SEI-AMP30041 with NVX 8 Gauge Amp Kit

300W RMS Class-D 4-Channel High Definition Marine Amplifier

• 75 watts x 4 channel @ 4 ohm
• Bridged: 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 75 watts x 4 channel @ 4 ohm
• Bridged: 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega SRPM700.4DW with NVX 8 Gauge Amp Kit

700W RMS Class-D 4-Channel 2-Ohm Stable Marine Amplifier - White

SRPM700.4DW, XKIT84 big
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Cerwin Vega SRPM700.4DW with NVX 8 Gauge Amp Kit

700W RMS Class-D 4-Channel 2-Ohm Stable Marine Amplifier - White

• 100 Watts RMS x 4 @ 4 ohm
• 150 Watts RMS x 4 @ 2 ohm
• Conformal Coating Protects Against Moisture
• Aluminum Heatsink
• Includes Amplifier Wiring Kit

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List price $623.98
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• 100 Watts RMS x 4 @ 4 ohm
• 150 Watts RMS x 4 @ 2 ohm
• Conformal Coating Protects Against Moisture
• Aluminum Heatsink
• Includes Amplifier Wiring Kit

MB Quart FA2-400.4 with Amplifier Wiring Kit

400W RMS Formula Series Class-D 4-Channel Car Amplifier

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MB Quart FA2-400.4 with Amplifier Wiring Kit

400W RMS Formula Series Class-D 4-Channel Car Amplifier

• 50 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 400 watts
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 50 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 400 watts
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

DS18 NXL-F4 (Hydro) with NVX 8 Gauge Amp Kit

640W Peak Class D HYDRO Series 4-Channel Marine and Powersports Flush Mount Amplifier

NXLF4_XKIT84 big
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DS18 NXL-F4 (Hydro) with NVX 8 Gauge Amp Kit

640W Peak Class D HYDRO Series 4-Channel Marine and Powersports Flush Mount Amplifier

• 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: 640 watts
• IPX67 waterproof rating
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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List price $635.94
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• 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: 640 watts
• IPX67 waterproof rating
• Class D 4 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Stinger SPX1000X5 with NVX 8 Gauge Amp Kit

150W RMS Micro Class D 5-Channel Marine Amplifier

SPX1000X5_XKIT86 big
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Stinger SPX1000X5 with NVX 8 Gauge Amp Kit

150W RMS Micro Class D 5-Channel Marine Amplifier

• 95 x 4 @ 4 ohm Stereo - CH 1-4
• 275 x 1 @4 ohm - CH 5
• 150 x 4 @ 2 ohm Stero - CH 1-4
• 500 x 1 @ 2 ohm - CH 5
• Total RMS Power: 150 watts
• Class D 4 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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List price $885.98
-46% $479.00

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• 95 x 4 @ 4 ohm Stereo - CH 1-4
• 275 x 1 @4 ohm - CH 5
• 150 x 4 @ 2 ohm Stero - CH 1-4
• 500 x 1 @ 2 ohm - CH 5
• Total RMS Power: 150 watts
• Class D 4 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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    FAQ for Multi-channel Amplifiers for Adding Speakers in 1974 XJ12

    Q: Can I upgrade or change the Multi-channel Amplifiers for Adding Speakers in 1974 Jaguar XJ12?

    A: Yes this page includes all the best Multi-channel Amplifiers for Adding Speakers that work in your XJ12.

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    2003 Harley Davidson FLHTC/I Electra Glide Classic

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    Shop your 1974 XJ12
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    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
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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