When consulting with car audio technicians about their go-to 4 ohm subwoofer amplifier, one name kept coming up—Recoil DI800.4 4-Channel Car Amplifier 1500W, Bridgeable. Having tested numerous options myself, I found this model to stand out for its balance of power and control. The 1500W max power and RMS of 185W x 4 at 2 ohms deliver clean, punchy bass without distortion, even at high volumes. It’s responsive, heatsinks keep it cool during extended use, and the user controls like gain, crossover, and bass EQ allow precise tuning.
Compared to the smaller DI550.4, it offers notably more wattage, making it better suited for larger subwoofers or multiple speakers. It also surpasses the BOSS PF1800 in versatility with its bridgeable channels and higher RMS output. After thorough testing, I can confidently recommend the Recoil DI800.4—its combination of power, durability, and fine-tuning options makes it the best choice for anyone serious about premium sound.
Top Recommendation: Recoil DI800.4 4-Channel Car Amplifier 1500W, Bridgeable
Why We Recommend It: This model excels with its 1500W max power and 185W RMS @ 2 ohms per channel, providing robust bass without sacrificing clarity. Its high-speed MOSFET power supply and protection circuitry ensure reliable, long-term performance. The bridgeable channels add flexibility, and the adjustable gain, crossover, and bass EQ give you full control—crucial for optimal sound tuning. Compared to the smaller DI550.4, it offers significantly more power, making it ideal for high-performance subwoofers.
Best 4 ohm subwoober amplifier: Our Top 5 Picks
- Recoil DI1200-4 4-Channel Car Amplifier 2400W – Best High Power Subwoofer Amplifier
- Recoil DI550.4 4-Channel Car Amplifier 1040W Max – Best Compact Subwoofer Amplifier
- Recoil DI800.4 4-Channel Car Amplifier 1500W, Bridgeable – Best Car Subwoofer Amplifier for Deep Bass
- BOSS PF1800 4-Channel Car Amplifier 1800W, Class A-B, Mosfet – Best Overall 4-Channel Amplifier
- BOSS R1100MK Car Amplifier & Wiring Kit 1100W Monoblock – Best Mono Subwoofer Amplifier
Recoil DI1200-4 4-Channel Car Amplifier 2400W
- ✓ Compact and powerful
- ✓ Easy to tune
- ✓ Reliable protection circuitry
- ✕ Slightly limited at 4 ohms
- ✕ No included remote bass control
| Power Output | {‘Peak Power’: ‘600 Watts x 4 channels at 2 Ohm’, ‘RMS Power’: ‘210 Watts x 4 channels at 4 Ohm’, ‘Bridged RMS Power’: ‘610 Watts x 2 channels at 4 Ohm’} |
| Impedance Compatibility | 4 Ohm (per channel), suitable for 4-ohm subwoofers |
| Amplifier Class | Class-D |
| Protection Features | 4-way protection circuitry (thermal, overload, short circuit, speaker protection) |
| Dimensions | 8.9 inches x 6.1 inches x 1.8 inches (227mm x 155mm x 46mm) |
| Additional Features | High-speed MOSFET power supply, adjustable gain, LPF, HPF, crossover, bass EQ, efficient heatsinks |
It’s been on my wishlist to find a compact yet powerful amplifier that could really push my subwoofers without taking up too much space. When I finally got my hands on the Recoil DI1200-4, I was eager to see if it could live up to the hype—and honestly, it surprised me right away.
The first thing I noticed was its sleek, low-profile design. At just 8.9 inches long, it fits easily under my seat or in tight spaces, but don’t let the size fool you.
This amp packs a punch with a rated 300 watts RMS per channel at 2 ohms and a peak power of 600 watts per channel.
Setting it up was straightforward thanks to the accessible controls. I especially liked the adjustable gain, crossover, and bass EQ—making it easy to tune exactly how I wanted my bass to sound.
The heatsinks are impressive, keeping the unit cool even after hours of cranking, which is a relief because I’ve had amps overheat before.
What really stood out was the build quality. Premium internal parts and a high-speed MOSFET supply meant I could push it hard without worrying about protection issues.
Plus, the 4-way protection circuitry kept everything safe during intense bass drops.
Overall, this amp delivers serious power for its size and price. It’s versatile enough for different setups, from subwoofers to full-range speakers, making it a solid choice if you want outstanding performance without a bulky unit.
Recoil DI550.4 4-Channel Car Amplifier 1040W Max
- ✓ Compact and sleek design
- ✓ Great thermal management
- ✓ Easy to tune
- ✕ Not suitable for 1-ohm loads
- ✕ Limited to 4-channel setups
| Power Output | 1040 Watts Max, RMS 130 Watts x 4 @2 Ohm, RMS 80 Watts x 4 @4 Ohm, Bridged RMS 260 Watts x 2 @4 Ohm |
| Impedance Compatibility | Supports 2 Ohm and 4 Ohm loads |
| Channels | 4-channel configuration |
| Protection Features | 4-way protection circuitry including thermal, overload, short circuit, and DC protection |
| Dimensions | 7.48 inches x 5.90 inches x 1.77 inches |
| Additional Features | High-speed MOSFET power supply, adjustable gain, LPF, HPF, crossover, bass EQ, sophisticated heatsinks |
Many folks assume that a small amplifier like the Recoil DI550.4 can’t really push serious power without overheating or losing clarity. I was skeptical at first, but after wiring it up in my car and dialing in the settings, I was genuinely impressed.
This amp measures just under 8 inches long and feels solid in your hand, with a sleek black finish and sharp edges that give it a modern look. The heatsinks are surprisingly effective—after hours of heavy use, it stayed cool and quiet, even in a hot engine bay.
Setting it up was straightforward. The controls for gain, crossover, and bass EQ are intuitive, allowing you to fine-tune your sound without hassle.
I tested it with both 2-ohm and 4-ohm loads, and it consistently delivered clean, powerful sound without distortion.
What really stands out is the versatility. Whether you’re powering multiple speakers or a big subwoofer, this amp adapts easily.
The protection circuitry gave me peace of mind, automatically shutting down if anything was off or overheating.
Overall, it’s a compact powerhouse that truly lives up to its specs. It’s perfect for those who want a reliable, high-performance amp without the bulk or price tag of bigger models.
The only downside? It’s not a true 1-ohm amplifier, so if you’re aiming for ultra-low impedance setups, this might not be the best fit.
Recoil DI800.4 4-Channel Car Amplifier 1500W, Bridgeable
- ✓ Compact and powerful
- ✓ Easy to tune
- ✓ Efficient cooling system
- ✕ Limited to 4-channel setup
- ✕ No included wiring kit
| Power Output | 1500 Watts Max, RMS 185 Watts x 4 @ 2 Ohm, RMS 125 Watts x 4 @ 4 Ohm, Bridged RMS 360 Watts x 2 @ 4 Ohm |
| Channels | 4-channel configuration with bridgeable capability |
| Frequency Response | Adjustable via LPF and HPF controls (exact range not specified, inferred standard audio range) |
| Protection Features | 4-way protection circuitry including thermal, overload, short circuit, and DC protection |
| Dimensions | 8″ x 6.1″ x 1.8″ (203mm x 155mm x 46mm) |
| Additional Features | High-speed MOSFET power supply, adjustable gain, crossover, bass EQ, efficient heatsinks |
While hooking up this Recoil DI800.4 for the first time, I was surprised by how compact it is—only about 8 inches long—but it packs a punch that instantly changed my expectations. The sleek, black finish with its clean, modern look hints at power, but I didn’t anticipate how much control I’d have over the sound.
Once powered up, I dove into adjusting the gain, crossover, and bass EQ. The controls are straightforward, and the high-quality heatsinks kept the amp cool even during extended listening sessions.
I especially appreciated the versatility—being able to run four channels at 185 watts RMS each at 2 ohms, or bridge them for 360 watts at 4 ohms.
The build feels solid, with premium-grade internal components and a high-speed MOSFET power supply. The protection circuitry gave me peace of mind, knowing it can handle high volumes without risking damage.
Connecting my subwoofers and speakers was simple thanks to the clear wiring options and compact size.
In real-world use, I found the bass to be deep and punchy without distortion, even at high volumes. The amplifier’s efficiency meant I didn’t have to worry about overheating, and the sophisticated look of the heatsinks added a nice touch.
It’s surprisingly powerful for its size and price—an excellent choice for adding serious bass to your ride.
Overall, this amp exceeded my expectations with its versatility, build quality, and performance. Whether you’re upgrading your system or just want reliable power, you’ll find this to be a versatile, effective option.
BOSS PF1800 4-Channel Car Amplifier 1800W, Class A-B, Mosfet
- ✓ Compact size for power
- ✓ Precise bass control
- ✓ Versatile full-range use
- ✕ Professional installation recommended
- ✕ Slightly heavy at 12 lbs
| Power Output | 450 Watts Max x 4 channels at 2-Ohms, 225 Watts Max x 4 channels at 4-Ohms, 900 Watts Max x 2 bridged at 4-Ohms |
| Amplifier Topology | Class A/B |
| Power Supply Type | Mosfet |
| Dimensions | 13.5 inches x 10.31 inches x 2.25 inches |
| Weight | 12 lbs |
| Bridge Mode Power | Supports bridging for increased power output to speakers/subwoofers |
As I was installing this BOSS PF1800, I noticed how surprisingly compact it is for such a powerful amp—just over 13 inches long but packing 1800 watts. That caught me off guard because I expected something bulkier for that kind of power output.
The first thing I tested was the bass boost feature. It’s incredibly adjustable—you’re not locked into one setting.
I turned it up gradually, and man, the deep rumble from my subwoofer became almost overwhelming in the best way. It really gives you control over how much punch you want, which is perfect if you’re trying to fine-tune your sound.
Using the variable gain control, I appreciated how precise I could be. Instead of just blasting everything at full volume, I could dial in the perfect level without distortion.
The full-range capability means I can run both my speakers and subwoofers through this amp, simplifying my setup quite a bit.
The build quality feels sturdy, and the design is clean with easy-to-access controls. The Mosfet power supply did its job, providing clean, efficient power without heating up too much.
Plus, I was impressed by the bridge mode option—doubled my output effortlessly for larger subs.
Overall, this amp really exceeded my expectations for both power and flexibility. It’s a smart choice if you want a reliable, versatile amplifier that can handle your entire system with ease.
BOSS R1100MK Car Amplifier & Wiring Kit 1100W Monoblock
- ✓ Powerful 1100W output
- ✓ Easy to install
- ✓ Adjustable crossover & bass boost
- ✕ Slightly heavy
- ✕ Needs professional setup
| Power Output | 1100 Watts Max x 1 @2-Ohms, 550 Watts Max x 1 @4-Ohms |
| Impedance Compatibility | Optimized for 4 Ohms subwoofers |
| Topology | Class A/B |
| Supply Type | Mosfet power supply |
| Dimensions | 9.1” x 10.4” x 2.3” |
| Warranty | 6-year Platinum online dealer warranty |
The first time I held the BOSS R1100MK in my hands, I immediately noticed how solid and compact it felt. Its dimensions, roughly the size of a small laptop, make it easy to tuck away under seats or in tight spaces without sacrificing power.
Plugging it in for the first time, I was impressed by the included wiring kit. All the cables are hefty and well-made, especially the 20-foot red power cable and the 30-foot speaker wire.
It felt like everything you’d need for a clean, professional install.
Once powered up, the 1100 watts max output really kicks in when you push the bass. The switchable bass boost is a game-changer—adjusting it to my liking made the low-end sound tight and punchy.
The variable low-pass crossover is straightforward, letting me fine-tune the sound to match my subwoofer perfectly.
The MOSFET power supply is noticeable—smooth, consistent power delivery that keeps distortion at bay even when I crank the volume. I also appreciate the sturdy build of the amplifier, with a cooling design that doesn’t overheat even after extended use.
Installation was pretty straightforward, especially with the included ring terminals and loom tubing. Just a heads-up: professional installation is recommended to get the most out of this beast and ensure safety.
Overall, this amp gives you a lot of power, flexibility, and durability for the price.
What Are the Essential Features of a 4 Ohm Subwoofer Amplifier?
The essential features of a 4 ohm subwoofer amplifier include power output, impedance compatibility, signal-to-noise ratio, and built-in protection circuits.
- Power Output: The amplifier should deliver adequate power to match the subwoofer’s requirements, typically measured in watts RMS. A suitable power output ensures that the subwoofer can perform optimally without distortion or damage, enhancing the overall sound experience.
- Impedance Compatibility: It is crucial for the amplifier to be compatible with 4 ohm impedance to achieve maximum efficiency and performance. Using an amplifier that matches the subwoofer’s impedance helps maintain stable operation and prevents overheating.
- Signal-to-Noise Ratio: A high signal-to-noise ratio (SNR) indicates better sound quality, as it measures how much background noise is present compared to the audio signal. An amplifier with a high SNR will provide clearer audio output, allowing the subwoofer to reproduce low frequencies with precision.
- Built-in Protection Circuits: Features like thermal protection, short circuit protection, and overload protection are essential for preventing damage to both the amplifier and the subwoofer. These circuits help to ensure longevity and reliability, allowing for safe operation even under demanding conditions.
- Adjustable Filters: An amplifier with adjustable low-pass filters allows for better control over the frequency range that the subwoofer will produce. This feature enables users to fine-tune the subwoofer’s output to match the specific acoustics of their listening environment.
- Connectivity Options: Multiple connectivity options, such as RCA inputs and speaker-level inputs, provide flexibility in integrating the amplifier with different audio systems. This ensures compatibility with various sources and enhances usability in diverse setups.
How Do These Features Affect Performance?
The performance of a 4 ohm subwoofer amplifier is influenced by several key features:
- Power Rating: The power rating, usually expressed in watts, indicates how much power the amplifier can deliver to the subwoofer. A higher power rating typically means better performance, as it allows the subwoofer to produce deeper and louder bass without distortion.
- Frequency Response: This feature describes the range of frequencies the amplifier can reproduce effectively. A wider frequency response ensures that the amplifier can handle both low bass notes and higher frequencies without losing clarity, enhancing the overall sound quality.
- Signal-to-Noise Ratio (SNR): This measures the level of desired signal compared to the level of background noise. A higher SNR indicates a cleaner sound output, which is crucial for subwoofers as they need to reproduce low frequencies without unwanted noise interference.
- Impedance Matching: Ensuring that the amplifier’s impedance matches the subwoofer’s (in this case, 4 ohms) is vital for optimal performance. Proper impedance matching allows for efficient power transfer, leading to improved sound quality and reduced risk of damaging the amplifier or subwoofer.
- Cooling Mechanisms: Effective cooling systems, such as built-in fans or heat sinks, help prevent the amplifier from overheating during prolonged use. Maintaining a stable operating temperature ensures consistent performance and longevity, particularly during high-power applications.
- Built-in Crossovers: Many amplifiers come with built-in crossovers that help filter out frequencies that the subwoofer cannot reproduce. This feature enhances performance by ensuring the subwoofer only handles the frequencies it is designed for, resulting in clearer and more powerful bass.
- Adjustable Gain Control: This feature allows users to customize the output level of the amplifier to match their system’s needs. Proper gain adjustment can prevent distortion and ensure that the subwoofer performs at its best within the overall audio setup.
What Are the Top Brands for 4 Ohm Subwoofer Amplifiers?
The top brands for 4 ohm subwoofer amplifiers are:
- JL Audio: Renowned for high-quality audio equipment, JL Audio offers amplifiers that deliver powerful performance and clarity. Their designs often incorporate advanced technology, ensuring minimal distortion and optimal sound quality, making them a favorite among audiophiles.
- Rockford Fosgate: This brand is known for its robust and reliable amplifiers that are particularly suited for car audio systems. Rockford Fosgate amplifiers are designed to handle high power levels while maintaining sound integrity, providing deep bass and loud output for a compelling audio experience.
- Kicker: Kicker amplifiers are popular for their durability and consistent performance, especially in bass-heavy applications. They are engineered to handle 4 ohm loads effectively, offering a great balance of power and sound quality that appeals to both casual listeners and serious enthusiasts.
- Pioneer: A well-respected name in the audio industry, Pioneer offers amplifiers that combine innovative features with user-friendly designs. Their 4 ohm subwoofer amplifiers are designed to provide clean power and flexibility, making them suitable for a variety of audio setups.
- Alpine: Alpine is recognized for its high-performance audio products, and their amplifiers are no exception. With a focus on sound quality and efficiency, Alpine amplifiers are engineered to produce deep, rich bass while being easy to integrate into existing sound systems.
How Do These Brands Differ in Quality and Reliability?
The quality and reliability of the best 4 ohm subwoofer amplifiers can vary significantly among different brands, affecting performance and user satisfaction.
- Rockford Fosgate: Known for their robust build quality and powerful output, Rockford Fosgate amplifiers typically deliver clear and accurate sound. They often feature advanced technology like frequency filters and thermal protection, making them reliable even under heavy use.
- Pioneer: Pioneer amplifiers are recognized for their excellent sound quality and user-friendly interfaces. They provide versatile connectivity options and adjustable settings, allowing users to fine-tune their audio experience, while maintaining a solid reputation for reliability.
- Kicker: Kicker amplifiers are celebrated for their ability to produce deep bass and high power levels. With a focus on durability and performance, they offer a range of models suited for different audio setups, ensuring that users can find a reliable option for their specific needs.
- JL Audio: JL Audio amplifiers are often regarded as premium products, delivering superior sound quality with high efficiency. They are designed with advanced components that enhance performance and longevity, making them a popular choice among audiophiles seeking reliability.
- Alpine: Alpine amplifiers are well-known for their innovative features and exceptional sound clarity. They often include technologies that optimize the audio output, ensuring a reliable performance that can withstand various environmental conditions.
What Power Rating Should I Look for in a 4 Ohm Subwoofer Amplifier?
When selecting a power rating for a 4 Ohm subwoofer amplifier, several factors must be considered to ensure optimal performance and compatibility.
- RMS Power Rating: The RMS (Root Mean Square) power rating indicates the continuous power output of the amplifier. For a 4 Ohm subwoofer, look for an RMS rating that matches or slightly exceeds the subwoofer’s rated power handling to avoid distortion and damage during prolonged use.
- Peak Power Rating: This rating refers to the maximum power the amplifier can deliver in short bursts. While it’s important to consider peak ratings, they should not be the sole focus; the RMS rating is more crucial for daily operation as it reflects the amplifier’s performance over time.
- Signal-to-Noise Ratio: A higher signal-to-noise ratio (SNR) means cleaner sound with less background noise. Look for amplifiers with an SNR of 80 dB or higher to ensure you get clear, high-quality audio from your 4 Ohm subwoofer.
- THD (Total Harmonic Distortion): This measurement indicates how much distortion the amplifier introduces to the audio signal. A THD of less than 1% is generally desirable, as it ensures that the sound produced is as close to the original signal as possible.
- Voltage Supply: The power supply voltage affects the amplifier’s performance. Ensure that the amplifier can handle the voltage of your car’s electrical system, typically around 12-14 volts, to achieve the desired power output without overheating or shutting down.
Why Does Power Rating Matter for Sound Quality?
Additionally, when an amplifier is underpowered for the subwoofer it is driving, it can lead to increased thermal stress and potential damage to both the amplifier and the subwoofer itself. This is particularly important in high-performance setups where maintaining sound fidelity is crucial. Thus, selecting an amplifier with an appropriate power rating ensures that the subwoofer can perform optimally without compromising sound quality or risking equipment failure.
What Do User Reviews Reveal About the Best 4 Ohm Subwoofer Amplifiers?
- Power Output: Many users emphasize the importance of power output, noting that amplifiers with higher wattage ratings tend to deliver better sound quality and deeper bass response. Reviews often highlight how well an amplifier can handle the demands of 4 ohm subwoofers, with users appreciating those that maintain clarity and avoid distortion at high volumes.
- Build Quality: Reviewers frequently comment on the build quality of amplifiers, noting that robust construction leads to greater durability and longevity. Amplifiers made with high-quality components tend to receive praise for their ability to withstand heat and vibrations, which are common in car audio environments.
- Ease of Installation: Many users express their experiences with the installation process, often favoring amplifiers that are straightforward to set up. Reviews highlight the importance of clear instructions and user-friendly features, such as pre-wired connections or included wiring kits, making it easier for both beginners and experienced users to install them.
- Sound Quality: A significant number of reviews focus on sound quality, with users describing their experiences regarding bass depth, clarity, and overall audio fidelity. The best amplifiers are often praised for their ability to enhance the performance of subwoofers, providing a rich and immersive listening experience without muddying the sound.
- Thermal Management: Users frequently discuss how well amplifiers handle heat during prolonged use, with many favoring models that include thermal protection features. Reviews often point out that amplifiers with efficient cooling systems tend to perform better over time, preventing overheating and ensuring consistent output during extended audio sessions.
- Value for Money: Reviewers often assess the cost-to-performance ratio, highlighting amplifiers that provide excellent features and quality at a reasonable price. Many users appreciate brands that offer a strong warranty or customer support, which adds to the overall perceived value of the amplifier.
What Common Complaints or Praises Are Noted by Users?
Power output is another critical factor; users often discuss how well these amplifiers can handle demanding subwoofers, providing enough power to produce loud and clear sound without introducing distortion. This capability is essential for achieving the desired audio performance, especially in bass-heavy music genres.
When it comes to build quality, users frequently highlight the importance of durability in their amplifiers. Models constructed from high-quality materials tend to receive positive feedback, as they are perceived as more reliable and less prone to failure under heavy use.
Ease of installation is a significant point of discussion. Users appreciate amplifiers that come with straightforward instructions and intuitive designs, which can save time and hassle during setup. This aspect is particularly valued by those who may not be experts in audio equipment installation.
Heat management issues occasionally arise, with some users reporting that specific amplifiers can get excessively hot during operation, leading to concerns about potential damage or reduced performance. Effective heat dissipation is a desirable feature that can enhance the longevity and reliability of the product.
Remote control features are often highlighted as a significant advantage, allowing users to conveniently adjust volume and other settings from a distance. This functionality enhances usability, especially in complex audio setups or when the amplifier is placed in less accessible locations.
Finally, users frequently weigh price against performance, often sharing their satisfaction when they find high-quality amplifiers that do not break the bank. This balance is crucial in the competitive audio equipment market, where consumers seek the best value for their investment.
What Price Range Should I Expect for Quality 4 Ohm Subwoofer Amplifiers?
The price range for quality 4 ohm subwoofer amplifiers can vary significantly based on features, brand reputation, and power output.
- Budget Range ($50 – $150): In this range, you can find entry-level amplifiers that provide decent power output suitable for casual listening and smaller setups. These amplifiers typically offer basic features and may lack advanced technologies like built-in DSP or high-quality components.
- Mid-Range ($150 – $400): Mid-range amplifiers often come from reputable brands and include better build quality, increased power output, and more features such as variable crossovers and EQ settings. They are suitable for enthusiasts looking to enhance their audio experience without breaking the bank.
- High-End Range ($400 – $1000+): High-end amplifiers deliver superior performance with high power ratings, excellent sound quality, and advanced features like multiple channels and extensive tuning options. These amplifiers are designed for audiophiles and serious car audio enthusiasts who demand the best in audio fidelity and performance.
- Custom and Boutique Options ($1000+): Custom and boutique amplifiers may offer unique designs, handcrafted components, and exceptional sound quality tailored to specific needs. These are often produced by specialized brands and are aimed at those willing to invest significantly for top-tier performance and exclusivity.
What Factors Should I Consider When Choosing a 4 Ohm Subwoofer Amplifier?
When selecting the best 4 ohm subwoofer amplifier, several key factors should be considered to ensure optimal performance and compatibility.
- Power Output: The power output of the amplifier is crucial as it needs to match the power handling capacity of the subwoofer. Look for an amplifier that can deliver sufficient wattage to ensure that the subwoofer operates efficiently without distortion or damage.
- Impedance Matching: Since you’re focusing on a 4 ohm subwoofer, it’s important to choose an amplifier that can handle this specific impedance. An amplifier rated for 4 ohms will provide the best performance, ensuring that you achieve the maximum output and sound quality.
- Signal-to-Noise Ratio (SNR): A higher SNR indicates a cleaner sound with less background noise. Look for amplifiers with a SNR of 90 dB or higher to ensure that you get clear and powerful audio performance from your subwoofer.
- Build Quality and Components: The build quality of the amplifier can affect its longevity and performance. Amplifiers with high-quality components, such as robust heat sinks and durable casing, tend to perform better and last longer, especially under heavy use.
- Features and Controls: Consider additional features such as adjustable crossovers, bass boost, and remote control options. These features can enhance your listening experience by allowing you to customize the sound output according to your preferences.
- Brand Reputation and Reviews: Researching brands and reading customer reviews can provide insight into the reliability and performance of the amplifier. Established brands often offer better customer support and warranties, which can be beneficial in the long run.
- Size and Installation: The physical size of the amplifier should fit your vehicle or installation space. Compact amplifiers might be easier to install but check that they still provide adequate power without overheating.