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1998 Subaru Legacy Outback

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Single, 1-channel monoblock sub amplifiers for when you add a sub

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

Amplifiers for Powering a Sub for 1998 Subaru Legacy Outback

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.
Power Series (17)
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X Series (1)
XFL Series (1)
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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MTX TN500.1

500W RMS Class D Terminator Series Monoblock Car Amplifier with Bass Remote

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MTX TN500.1

500W RMS Class D Terminator Series Monoblock Car Amplifier with Bass Remote

• 300 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier

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• 300 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier

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American Bass Godfather 3000.1FR (GF-3000.1FR)

3000W RMS Class D Godfather Series Monoblock Car Amplifier with Bass Remote

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American Bass Godfather 3000.1FR (GF-3000.1FR)

3000W RMS Class D Godfather Series Monoblock Car Amplifier with Bass Remote

• 1400 watts x 1 channel @ 4 ohm
• 2300 watts x 1 channel @ 2 ohm
• 3000 watts x 1 channel @ 1 ohm
• Total RMS Power: 3000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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MB Quart NA4-400.1

400W RMS Class D Nautic Series Monoblock Marine and Powersports Amplifier with Bass Remote

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MB Quart NA4-400.1

400W RMS Class D Nautic Series Monoblock Marine and Powersports Amplifier with Bass Remote

• 200 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel @ 2 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable Monoblock Amplifier

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• 200 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel @ 2 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable Monoblock Amplifier

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MB Quart PA1-5000.1

5000W Peak Class D Premium Pro Series Monoblock Car Amplifier with Bass Remote

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MB Quart PA1-5000.1

5000W Peak Class D Premium Pro Series Monoblock Car Amplifier with Bass Remote

• 2500 watts x 1 channel @ 4 ohm
• 5000 watts x 1 channel @ 2 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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• 2500 watts x 1 channel @ 4 ohm
• 5000 watts x 1 channel @ 2 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier

JBL ClubA1000 (Club A 1000) - Open Box, Great

High Performance Mono-block Subwoofer Amplifier

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JBL ClubA1000 (Club A 1000) - Open Box, Great

High Performance Mono-block Subwoofer Amplifier

• Class D Amp Technology
• 4 Ohm: 600 Watts RMS x 1
• 2 Ohm: 1000 Watts RMS x 1
• Variable Crossover and Bass Boost
• Turn-On Mode Switch

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Earthquake Sound Mini D2000

2000W Peak (1200W RMS) Class D MiNi Series Monoblock Car Amplifier

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Earthquake Sound Mini D2000

2000W Peak (1200W RMS) Class D MiNi Series Monoblock Car Amplifier

• 650 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

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$345.99

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DC Audio 10.0k

10000W RMS Class D Competition Series Monoblock Car Amplifier (with Bass Remote)

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DC Audio 10.0k

10000W RMS Class D Competition Series Monoblock Car Amplifier (with Bass Remote)

• 3000 watts x 1 channel @ 4 ohm
• 5500 watts x 1 channel @ 2 ohm
• 10000 watts x 1 channel @ 1 ohm
• Total RMS Power: 10000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Pioneer GM-DX971

2400W Peak (1200W RMS) Class D GM Series Monoblock Car Amplifier with Remote Bass

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Pioneer GM-DX971

2400W Peak (1200W RMS) Class D GM Series Monoblock Car Amplifier with Remote Bass

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

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DC Audio 3.5k

3500W Peak Class D Competition Series Monoblock Car Amplifier (with Bass Remote)

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DC Audio 3.5k

3500W Peak Class D Competition Series Monoblock Car Amplifier (with Bass Remote)

• 750 watts x 1 channel @ 4 ohm
• 1800 watts x 1 channel @ 2 ohm
• 3500 watts x 1 channel @ 1 ohm
• Total RMS Power: 3500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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NVX XKIT02

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Cerwin-Vega XED6001D

600W RMS Class D XED Series Monoblock Car Amplifier with Bass Remote

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Cerwin-Vega XED6001D

600W RMS Class D XED Series Monoblock Car Amplifier with Bass Remote

• 320 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier

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List price $203.99
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Cerwin-Vega CVPRO5K

10000W Peak (5000W RMS) Class D CV PRO Series Monoblock Car Amplifier with Bass Remote

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Cerwin-Vega CVPRO5K

10000W Peak (5000W RMS) Class D CV PRO Series Monoblock Car Amplifier with Bass Remote

• 1900 watts x 1 channel @ 4 ohm
• 3300 watts x 1 channel @ 2 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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DS18 G1800.1D

1800W Peak (600W RMS) Class D GEN-X Series Monoblock Car Amplifier with Bass Remote

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DS18 G1800.1D

1800W Peak (600W RMS) Class D GEN-X Series Monoblock Car Amplifier with Bass Remote

• 250 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 1 ohm Stable Monoblock Amplifier

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$239.95

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Kenwood eXcelon XR601-1

600W RMS Class D eXcelon Reference Series Monoblock Car Amplifier with Bass Remote

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Kenwood eXcelon XR601-1

600W RMS Class D eXcelon Reference Series Monoblock Car Amplifier with Bass Remote

• 400 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier

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List price $520.00
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Alpine Status HDA-M80

800W RMS Class D Status Series Monoblock Car Amplifier

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Alpine Status HDA-M80

800W RMS Class D Status Series Monoblock Car Amplifier

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable Monoblock Amplifier

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American Bass Godfather Comp 11D (GF-COMP-11D)

11000W Peak Class D Godfather Series Monoblock Car Amplifier

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American Bass Godfather Comp 11D (GF-COMP-11D)

11000W Peak Class D Godfather Series Monoblock Car Amplifier

• Total peak power output: 11000 watts
• Class D Stable Monoblock Amplifier
• Signal sensing remote turn-on
• Crystal-clear, distortion-free sound
• Strappable car amplifier

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List price $3063.06
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DC Audio 1.2k

1200W RMS Class D Competition Series Monoblock Car Amplifier (with Bass Remote)

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DC Audio 1.2k

1200W RMS Class D Competition Series Monoblock Car Amplifier (with Bass Remote)

• 350 watts x 1 channel @ 4 ohm
• 700 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

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List price $545.60
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Alpine KTA-200M

400W Peak (200W RMS) Class D Power Pack Series Monoblock Car Amplifier

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Alpine KTA-200M

400W Peak (200W RMS) Class D Power Pack Series Monoblock Car Amplifier

• 200 watts x 1 channel @ 4 ohm
• 200 watts x 1 channel @ 2 ohm
• Total RMS Power: 200 watts
• Class D 2 ohm Stable Monoblock Amplifier

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List price $300.00
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DS18 FRP-3.5K/TI

3500W RMS Class D FRP Series Monoblock Car Amplifier with Bass Remote (Titanium)

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DS18 FRP-3.5K/TI

3500W RMS Class D FRP Series Monoblock Car Amplifier with Bass Remote (Titanium)

• 1000 watts x 1 channel @ 4 ohm
• 2000 watts x 1 channel @ 2 ohm
• 3500 watts x 1 channel @ 1 ohm
• Total RMS Power: 3500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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JBL Club A600 (AMPCBA600AM)

1200W Peak (600W RMS) Class D Club Series Compact Monoblock Amplifier with Bass Remote

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JBL Club A600 (AMPCBA600AM)

1200W Peak (600W RMS) Class D Club Series Compact Monoblock Amplifier with Bass Remote

• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier

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Cerwin-Vega XED3001D

300W RMS Class D XED Series Monoblock Car Amplifier

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Cerwin-Vega XED3001D

300W RMS Class D XED Series Monoblock Car Amplifier

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

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    FAQ for Monoblock Sub Amplifiers in 1998 Legacy Outback

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 1998 Subaru Legacy Outback?

    A: Yes this page includes all the best Monoblock Sub Amplifiers that work in your Legacy Outback.

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