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1977 Porsche 924

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

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Amps for Adding Speakers for 1977 Porsche 924

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.
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.
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Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
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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Diamond Audio DXM800.4D with NVX 8 Gauge Amp Kit

800W RMS DXM Series Class-D 4-Channel Marine Amplifier

DXM8004D_XKIT84 big
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Diamond Audio DXM800.4D with NVX 8 Gauge Amp Kit

800W RMS DXM Series Class-D 4-Channel Marine Amplifier

• 125 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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-14% $649.99

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• 125 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin-Vega S91100.5D + Free High Quality NVX Amp Kit

Stroker Series 5-Channel Car Amplifier

S91100.5D, xkit46 big
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Cerwin-Vega S91100.5D + Free High Quality NVX Amp Kit

Stroker Series 5-Channel Car Amplifier

• Cerwin Vega Stroker 5-channel Amplifier
• 150W x 4 chan. @ 4/2/1 Ω + 500W x 1 chan. @ 2/1 Ω
• 400W x 2 chan. @ 4/2 Ω + 500W x 1 @ 2 Ω
• Crossover: 35Hz – 350Hz
• Frequency Response: 10Hz – 35KHz
• Remote Bass Knob Included

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• Cerwin Vega Stroker 5-channel Amplifier
• 150W x 4 chan. @ 4/2/1 Ω + 500W x 1 chan. @ 2/1 Ω
• 400W x 2 chan. @ 4/2 Ω + 500W x 1 @ 2 Ω
• Crossover: 35Hz – 350Hz
• Frequency Response: 10Hz – 35KHz
• Remote Bass Knob Included

NVX - Worth the Envy - Direct to Consumer Car Audio

Cerwin-Vega VCU85 with Belva 4 Gauge Amp Kit

1900W Peak (950W RMS) Vega Series Class-D 5-Channel Amplifier

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Cerwin-Vega VCU85 with Belva 4 Gauge Amp Kit

1900W Peak (950W RMS) Vega Series Class-D 5-Channel Amplifier

• 80 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 350 watts x 1 channel @ 2 ohm
• Total RMS Power: 950 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 80 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 350 watts x 1 channel @ 2 ohm
• Total RMS Power: 950 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

Hertz Venezia V4 Compact with NVX 4 Gauge Amp Kit

760W RMS Venezia Series Class-D 4-Channel Compact Marine Amplifier

VENCOMPACTV4C_XKIT44 big Out of stock
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Hertz Venezia V4 Compact with NVX 4 Gauge Amp Kit

760W RMS Venezia Series Class-D 4-Channel Compact Marine Amplifier

• 110 watts x 4 channel @ 4 ohm
• 190 watts x 4 channel @ 2 ohm
• Total RMS Power: 760 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 110 watts x 4 channel @ 4 ohm
• 190 watts x 4 channel @ 2 ohm
• Total RMS Power: 760 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

MB Quart FA2-900.5 with NVX 4 Gauge Amp Kit

900W RMS Formula Series Class-D 5-Channel Car Amplifier

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MB Quart FA2-900.5 with NVX 4 Gauge Amp Kit

900W RMS Formula Series Class-D 5-Channel Car Amplifier

• 50 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 900 watts
• Class D Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 50 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 900 watts
• Class D Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio MICRO82U with NVX 8 Gauge Amp Kit

500W RMS Micro Series 2-Channel Class-D Amplifier

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Diamond Audio MICRO82U with NVX 8 Gauge Amp Kit

500W RMS Micro Series 2-Channel Class-D Amplifier

• 150 watts x 2 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 2 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega S9500.2D + NVX XLCA2 Line-Output-Converter + Amp Kit

Stroker Series 500W RMS 2-Channel Amplifier + NVX L.O.C with Bass Enhancer + 4 Gauge Amp Kit

S9500.2D, XLCA2, BAK42 big
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Cerwin Vega S9500.2D + NVX XLCA2 Line-Output-Converter + Amp Kit

Stroker Series 500W RMS 2-Channel Amplifier + NVX L.O.C with Bass Enhancer + 4 Gauge Amp Kit

• 4/2/1 ohm: 250 watts x 2 chan.
• Bridged, 4/2 ohm: 700 x 1 chan.
• Class-D 2-channel 4-Ohm Amplifier
• Frequency Response: 10Hz ~ 35KHz
• Crossover 35Hz – 350Hz

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• 4/2/1 ohm: 250 watts x 2 chan.
• Bridged, 4/2 ohm: 700 x 1 chan.
• Class-D 2-channel 4-Ohm Amplifier
• Frequency Response: 10Hz ~ 35KHz
• Crossover 35Hz – 350Hz

Deaf Bonce MACHETE MFA-5.1000 with Belva 4 Gauge Amp Kit

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

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Deaf Bonce MACHETE MFA-5.1000 with Belva 4 Gauge Amp Kit

480W RMS Class D Machete Series 5-Channel Full Range 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
• Includes Amplifier Wiring Kit

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• 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
• Includes Amplifier Wiring Kit

Cerwin Vega HRPM300.2D with NVX 8 Gauge Amp Kit

300W RMS HRPM Series Class-D 2-Channel Marine Amplifier

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Cerwin Vega HRPM300.2D with NVX 8 Gauge Amp Kit

300W RMS HRPM Series Class-D 2-Channel Marine Amplifier

• 100 watts x 2 channel @ 4 ohm
• 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 100 watts x 2 channel @ 4 ohm
• 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin-Vega H440.4D with NVX 4 Gauge Amp Kit

440W RMS HED Series Class-D 4-Channel Amplifier

H4404D_XKIT44 big Out of stock
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Cerwin-Vega H440.4D with NVX 4 Gauge Amp Kit

440W RMS HED Series Class-D 4-Channel Amplifier

• 75 watts x 4 channel @ 4 ohm
• 110 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 440 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 75 watts x 4 channel @ 4 ohm
• 110 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 440 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio DES400.2D with NVX 8 Gauge Amp Kit

500W RMS DES Series Class-D 2-Channel Amplifier

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Diamond Audio DES400.2D with NVX 8 Gauge Amp Kit

500W RMS DES Series Class-D 2-Channel Amplifier

• 200 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 200 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

DS18 ZXI.4 with NVX 4 Gauge Amp Kit

2200W Peak (740W RMS) Class D ZXI Series 4 Channel Car Amplifier

ZXI4_XKIT44 big Out of stock
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DS18 ZXI.4 with NVX 4 Gauge Amp Kit

2200W Peak (740W RMS) Class D ZXI Series 4 Channel Car Amplifier

• 125 watts x 4 channel @ 4 ohm
• 185 watts x 4 channel @ 2 ohm
• Bridged: 370 watts x 2 channel @ 4 ohm
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 125 watts x 4 channel @ 4 ohm
• 185 watts x 4 channel @ 2 ohm
• Bridged: 370 watts x 2 channel @ 4 ohm
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

DS18 NXL-N2 (Hydro) with NVX 8 Gauge Amp Kit

900W Peak Class D HYDRO Series 2-Channel Ultra-Compact Marine and Powersports Nano Amplifier

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DS18 NXL-N2 (Hydro) with NVX 8 Gauge Amp Kit

900W Peak Class D HYDRO Series 2-Channel Ultra-Compact Marine and Powersports Nano Amplifier

• 100 watts x 2 channel @ 4 ohm
• 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 1 channel @ 4 ohm
• Total Peak Power: 900 watts
• IP67 waterproof rating
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 100 watts x 2 channel @ 4 ohm
• 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 1 channel @ 4 ohm
• Total Peak Power: 900 watts
• IP67 waterproof rating
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Audio Control ACX-300.4 + NVX XKIT84 8 Gauge Amp Wiring Kit

300 Watt Marine 4-Channel Amplifier + NVX Premium Wiring Kit

ACX-300.4, XKIT84 big
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Audio Control ACX-300.4 + NVX XKIT84 8 Gauge Amp Wiring Kit

300 Watt Marine 4-Channel Amplifier + NVX Premium Wiring Kit

• 300 Watts @ 2 Ohm
• 175 Watts @ 4 Ohm
• 4/3/2 Channel Amplifier

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• 300 Watts @ 2 Ohm
• 175 Watts @ 4 Ohm
• 4/3/2 Channel Amplifier

Rockford Fosgate T1000X5AD with Amplifier Wiring Kit

1000W RMS Power-Series Class-AD 5-channel Car Amplifier

T1000X5ad, XKIT46 big
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Rockford Fosgate T1000X5AD with Amplifier Wiring Kit

1000W RMS Power-Series Class-AD 5-channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class AD Full Range: 2 ohms, Sub: 1 ohm Stable 5-Channel Amplifier

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• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class AD Full Range: 2 ohms, Sub: 1 ohm Stable 5-Channel Amplifier

American Bass XFL DC 4200 with Belva 8 Gauge Amp Kit

2000W Peak (720W RMS) XFL Series Class-D 4-Channel Amplifier

XFLDC4200_BAK84 big
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American Bass XFL DC 4200 with Belva 8 Gauge Amp Kit

2000W Peak (720W RMS) XFL Series Class-D 4-Channel Amplifier

• 100 watts x 4 channel @ 4 ohm
• 180 watts x 4 channel @ 2 ohm
• Bridged: 360 watts x 2 channel @ 4 ohm
• Total RMS Power: 720 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 100 watts x 4 channel @ 4 ohm
• 180 watts x 4 channel @ 2 ohm
• Bridged: 360 watts x 2 channel @ 4 ohm
• Total RMS Power: 720 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Autotek MM-3025.2D with Belva 4 Gauge Amp Kit

3000W Peak Class D Mean Machine Series 2-Channel Car Amplifier

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Autotek MM-3025.2D with Belva 4 Gauge Amp Kit

3000W Peak Class D Mean Machine Series 2-Channel Car Amplifier

• 750 watts x 2 channel @ 4 ohm
• 1500 watts x 2 channel @ 2 ohm
• Bridged: 3000 watts x 1 channel @ 4 ohm
• Total Peak Power: 3000 watts
• Class D Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 750 watts x 2 channel @ 4 ohm
• 1500 watts x 2 channel @ 2 ohm
• Bridged: 3000 watts x 1 channel @ 4 ohm
• Total Peak Power: 3000 watts
• Class D Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

DS18 G1800.4D with Belva 4 Gauge Amp Kit

1800W Peak 860W RMS GEN-X Series Full-Range Class-D 4-Channel Amplifier

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DS18 G1800.4D with Belva 4 Gauge Amp Kit

1800W Peak 860W RMS GEN-X Series Full-Range Class-D 4-Channel Amplifier

• 150 watts x 4 channel @ 4 ohm
• 230 watts x 4 channel @ 2 ohm
• Bridged: 430 watts x 2 channel @ 4 ohm
• Total RMS Power: 860 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 4 channel @ 4 ohm
• 230 watts x 4 channel @ 2 ohm
• Bridged: 430 watts x 2 channel @ 4 ohm
• Total RMS Power: 860 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega SRPM700.2DW with NVX 8 Gauge Amp Kit

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

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Cerwin Vega SRPM700.2DW with NVX 8 Gauge Amp Kit

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

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

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61
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• 200 Watts RMS x 2 @ 4 ohm
• 350 Watts RMS x 2 @ 2 ohm
• Conformal Coating Protects Against Moisture
• Aluminum Heatsink
• Includes Amplifier Wiring Kit

Diamond Audio DES1000.5D with NVX 4 Gauge Amp Kit

1100W RMS DES Series Class-D 5-Channel Full-Range Amplifier

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Diamond Audio DES1000.5D with NVX 4 Gauge Amp Kit

1100W RMS DES Series Class-D 5-Channel Full-Range Amplifier

• 90 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 90 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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    FAQ for Multi-channel Amplifiers for Adding Speakers in 1977 924

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