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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.

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 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 HXM1100.6D with NVX 4 Gauge Amp Kit

1100W RMS HXM Series Class-D 6-Channel Full-Range Marine Amplifier

HXM11006D_XKIT46 big
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Diamond Audio HXM1100.6D with NVX 4 Gauge Amp Kit

1100W RMS HXM Series Class-D 6-Channel Full-Range Marine Amplifier

• 90 watts x 4 channel + 250 watts x 2 channel @ 4 ohm
• 150 watts x 4 channel + 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 6-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 90 watts x 4 channel + 250 watts x 2 channel @ 4 ohm
• 150 watts x 4 channel + 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 150 watts x 2 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 6-Channel Amplifier
• Includes Amplifier Wiring Kit

DS18 NXL-X1200.5D (Hydro) with NVX 4 Gauge Amp Kit

2800W Peak Class D HYDRO Series 5-Channel Marine and Powersports Amplifier

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DS18 NXL-X1200.5D (Hydro) with NVX 4 Gauge Amp Kit

2800W Peak Class D HYDRO Series 5-Channel Marine and Powersports Amplifier

• 150 watts x 4 channel + 350 watts @ 4 ohm
• 200 watts x 4 channel + 600 watts @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm + 600 watts @ 2 ohm
• Total RMS Power: 2800 watts
• IPX6 waterproof rating
• Class D 2 ohm Stable 5-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 4 channel + 350 watts @ 4 ohm
• 200 watts x 4 channel + 600 watts @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm + 600 watts @ 2 ohm
• Total RMS Power: 2800 watts
• IPX6 waterproof rating
• Class D 2 ohm Stable 5-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

NVX - Worth the Envy - Direct to Consumer Car Audio

Hertz HP 802 with NVX 1/0 Gauge Amp Kit

1800W RMS HP Series Class-AB 2-Channel Amplifier

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Hertz HP 802 with NVX 1/0 Gauge Amp Kit

1800W RMS HP Series Class-AB 2-Channel Amplifier

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

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

Stinger SPX350X2 with NVX 8 Gauge Amp Kit

350W MAX (175W RMS) Series 4 ohm Stable 2-Channel Class-D Powersports Amplifier w/ Remote Level Control

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Stinger SPX350X2 with NVX 8 Gauge Amp Kit

350W MAX (175W RMS) Series 4 ohm Stable 2-Channel Class-D Powersports Amplifier w/ Remote Level Control

• 125 Watts RMS x 2 @ 4 ohm
• 175 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 350 Watts
• CEA-2006 Compliant
• 0 to 12 dB Bass Boost
• Aluminum Heatsink
• For Powersports Applications
• Includes Amplifier Wiring Kit

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• 125 Watts RMS x 2 @ 4 ohm
• 175 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 350 Watts
• CEA-2006 Compliant
• 0 to 12 dB Bass Boost
• Aluminum Heatsink
• For Powersports Applications
• Includes Amplifier Wiring Kit

Cerwin-Vega XED3002D with Belva 8 Gauge Amp Kit

250W RMS XED Series Class-D 2-Channel Car Amplifier

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Cerwin-Vega XED3002D with Belva 8 Gauge Amp Kit

250W RMS XED Series Class-D 2-Channel Car Amplifier

• 80 watts x 2 channel @ 4 ohm
• 120 watts x 2 channel @ 2 ohm
• Bridged: 220 watts x 1 channel @ 4 ohm
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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• 80 watts x 2 channel @ 4 ohm
• 120 watts x 2 channel @ 2 ohm
• Bridged: 220 watts x 1 channel @ 4 ohm
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

Diamond Audio HX1200.5 with NVX 4 Gauge Amp Kit

1400W RMS HEX Series 5-Channel Class-D Amplifier

HX12005_XKIT46 big
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Diamond Audio HX1200.5 with NVX 4 Gauge Amp Kit

1400W RMS HEX Series 5-Channel Class-D Amplifier

• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 1200 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power: 1200 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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Wet Sounds SDX-6 with NVX 4 Gauge Amp Kit

1755 Watt Sinister Series Full Range 6-Channel Class D Amplifier (WetSounds)

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Wet Sounds SDX-6 with NVX 4 Gauge Amp Kit

1755 Watt Sinister Series Full Range 6-Channel Class D Amplifier (WetSounds)

• RMS: 185W x 6 @ 4 ohm, 290W x 6 @ 2 ohm, Bridged: 585W x 3 @ 4 ohm
• Total RMS Power: 1755 watts
• Wet Sounds Unique Transformer
• Advanced Intelligent Microprocessor Control
• Top Mounted Crossover Controls
• Dimensions: 13" W x 19" L x 5" H
• Includes Amplifier Wiring Kit

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• RMS: 185W x 6 @ 4 ohm, 290W x 6 @ 2 ohm, Bridged: 585W x 3 @ 4 ohm
• Total RMS Power: 1755 watts
• Wet Sounds Unique Transformer
• Advanced Intelligent Microprocessor Control
• Top Mounted Crossover Controls
• Dimensions: 13" W x 19" L x 5" H
• Includes Amplifier Wiring Kit

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Wet Sounds SDX2 with NVX 4 Gauge Amp Kit

1250 Watt Sinister Series Full Range 2-Channel Class D Amplifier (WetSounds)

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Wet Sounds SDX2 with NVX 4 Gauge Amp Kit

1250 Watt Sinister Series Full Range 2-Channel Class D Amplifier (WetSounds)

• RMS: 400W x 2 @ 4 ohm, 620W x 2 @ 2 ohm, Bridged: 1250W x 1 @ 4 ohm
• Total RMS Power: 1250 watts
• Wet Sounds unique transformer
• Advanced Intelligent Microprocessor Control
• Top mounted crossover controls
• Dimensions: 9.82" W x 13.50" L x 2.70" H
• Includes Amplifier Wiring Kit

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• RMS: 400W x 2 @ 4 ohm, 620W x 2 @ 2 ohm, Bridged: 1250W x 1 @ 4 ohm
• Total RMS Power: 1250 watts
• Wet Sounds unique transformer
• Advanced Intelligent Microprocessor Control
• Top mounted crossover controls
• Dimensions: 9.82" W x 13.50" L x 2.70" H
• Includes Amplifier Wiring Kit

DS18 SMD-2800.5 with NVX 1/0 Gauge Amp Kit

2800W RMS Class AB/D SMD Series 5 Channel Car Amplifier with Bass Remote

SMD28005_XKIT06 big
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DS18 SMD-2800.5 with NVX 1/0 Gauge Amp Kit

2800W RMS Class AB/D SMD Series 5 Channel Car Amplifier with Bass Remote

• 180 watts x 4 channel + 700 watts x 1 channel @ 4 ohm
• 250 watts x 4 channel + 1100 watts x 1 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm + 1100 watts x 1 channel @ 2 ohm
• Total RMS Power: 2800 watts
• Class AB / D 1 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 180 watts x 4 channel + 700 watts x 1 channel @ 4 ohm
• 250 watts x 4 channel + 1100 watts x 1 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm + 1100 watts x 1 channel @ 2 ohm
• Total RMS Power: 2800 watts
• Class AB / D 1 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

JL Audio XDM800/8 (Open Box, Great)

800W RMS XDM Series Class D 8-Channel Car/Marine Amplifier

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JL Audio XDM800/8 (Open Box, Great)

800W RMS XDM Series Class D 8-Channel Car/Marine Amplifier

• 75 watts x 8 channel @ 4 ohm
• 100 watts x 8 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 8-Channel-Channel Amplifier

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• 75 watts x 8 channel @ 4 ohm
• 100 watts x 8 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 8-Channel-Channel Amplifier

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Rockford Fosgate Punch PBR300X2 (Open Box, Great)

300W RMS Class BR Punch Series 2 Channel Car Amplifier

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Rockford Fosgate Punch PBR300X2 (Open Box, Great)

300W RMS Class BR Punch Series 2 Channel Car 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 BR 2 ohm Stable 2-Channel Amplifier

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Rockford Fosgate PBR400X4D (Open Box, Great)

400W RMS Class D Punch Series 4 Channel Car Amplifier

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Rockford Fosgate PBR400X4D (Open Box, Great)

400W RMS Class D Punch Series 4 Channel Car Amplifier

• 50 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

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• 50 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

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JBL DSP4086AM - Open Box, Great

8-Channel Class D Amplifier Design with Digital Signal Processing

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JBL DSP4086AM - Open Box, Great

8-Channel Class D Amplifier Design with Digital Signal Processing

• 40 Watts RMS x 8 @ 4 ohm
• 60 Watts RMS x 8 @ 2 ohm
• Total Peak Power: 1000 Watts
• CEA-2006 Compliant
• Frequency Response:10Hz to 22kHz

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DS18 SXE-2000.4D/RD (Open Box, Great)

2000W Peak (640W RMS) Class D SXE Series 4 Channel Car Amplifier

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DS18 SXE-2000.4D/RD (Open Box, Great)

2000W Peak (640W RMS) Class D SXE Series 4 Channel Car Amplifier

• @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power:
• Class Stable Amplifier
• Red Brushed Aluminum Body Color

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• @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power:
• Class Stable Amplifier
• Red Brushed Aluminum Body Color

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Rockford Fosgate Punch P400X4 (Open Box, Great)

400W RMS Class AB Punch Series 4 Channel Car Amplifier

P400X4 big
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Rockford Fosgate Punch P400X4 (Open Box, Great)

400W RMS Class AB Punch Series 4 Channel Car Amplifier

• 50 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 A/B 2 ohm Stable 4-Channel Amplifier

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• 50 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 A/B 2 ohm Stable 4-Channel Amplifier

Rockford Fosgate Power T400X4ad (Open Box, Great)

400W RMS Class AD Power Series 4 Channel Car Amplifier

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Rockford Fosgate Power T400X4ad (Open Box, Great)

400W RMS Class AD Power Series 4 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: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

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List price $569.99
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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: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

JL Audio XDM1000/5 (Open Box, Great)

1000W RMS Class D XDM Series 5 Channel Car and Marine Amplifier

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JL Audio XDM1000/5 (Open Box, Great)

1000W RMS Class D XDM Series 5 Channel Car and Marine Amplifier

• 75 watts x 4 channel + 400 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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• 75 watts x 4 channel + 400 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 5-Channel Amplifier

JL Audio HD600/4 (Open Box, Great)

600W RMS Class D HD Series 4 Channel Car Amplifier

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JL Audio HD600/4 (Open Box, Great)

600W RMS Class D HD Series 4 Channel Car Amplifier

• 150 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 1.5 ohm Stable 4-Channel Amplifier

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Universal Icon Universal – fits most vehicles.

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17
List price $1149.99
-15% $977.49

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• 150 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 1.5 ohm Stable 4-Channel Amplifier

Rockford Fosgate Power T1000-4AD (Open Box, Great)

1000W RMS Class AD Power Series 4 Channel Car Amplifier

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Rockford Fosgate Power T1000-4AD (Open Box, Great)

1000W RMS Class AD Power Series 4 Channel Car Amplifier

• 250 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 AD 1 ohm Stable 4-Channel Amplifier

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

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13
List price $1099.99
-15% $934.99

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• 250 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 AD 1 ohm Stable 4-Channel Amplifier

JL Audio VX800/8i (Open Box, Great)

800W RMS Class D VXi Series 8 Channel Car Amplifier

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JL Audio VX800/8i (Open Box, Great)

800W RMS Class D VXi Series 8 Channel Car Amplifier

• 75 watts x 8 channel @ 4 ohm
• 100 watts x 8 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 8-Channel Amplifier

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

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List price $1849.99
-15% $1,572.49

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• 75 watts x 8 channel @ 4 ohm
• 100 watts x 8 channel @ 2 ohm
• Bridged: 200 watts x 4 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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

    Q: Can I upgrade or change the Multi-channel Amplifiers for Adding Speakers in 1977 Porsche 924?

    A: Yes this page includes all the best Multi-channel Amplifiers for Adding Speakers that work in your 924.

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