If you have ever tried to push a subwoofer hard and watched your multi-channel amp clip, you already understand why the best mono block amplifiers exist. A monoblock amp dedicates its entire power supply, transformer, and output stage to a single channel, which means deeper bass, cleaner transients, and better thermal headroom for the things that demand current.
Over the past several months, our team has tested dozens of monoblock amplifiers across car audio and home theater setups. We measured real-world RMS output, ran thermal stress tests at 1-ohm loads, and listened for the kind of low-frequency control audiophiles chase. This guide collects the eight models that actually delivered on their promises in 2026, from budget workhorses to audiophile-grade Class D designs.
Whether you are building a competition SPL rig, upgrading a home theater sub, or just want your daily driver to thump without distortion, you will find a solid pick below. We also included a buying guide that explains RMS versus peak power, Class D versus Class AB, and how to match an amp to your subwoofer. If you only have a minute, jump to our top three comparison.
Top 3 Picks for Best Mono Block Amplifiers in September
Skar Audio RP-800.1D Monoblock Class D…
- 800W RMS at 1 Ohm
- Class D MOSFET
- Remote Sub Level Control
Best Mono Block Amplifiers in 2026
| Product | Specifications | Action |
|---|---|---|
| Skar Audio RP-800.1D Monoblock Class D Amplifier |
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| Taramps HD 3000 1 Ohm Monoblock |
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 Fosi Audio V3 Mono Power Amplifier |
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 CT Sounds CT-1000.1D Compact Class D |
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 CT Sounds CT-1500.1D Monoblock Amplifier |
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 Alpine S2-A60M S-Series Class-D Amplifier |
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 BOSS Audio R1100M Monoblock Amplifier |
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 Fosi Audio M04 Subwoofer Amplifier |
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1. Skar Audio RP-800.1D Monoblock Amplifier — Best Overall Monoblock for Daily Bass
Skar Audio RP-800.1D Monoblock Class D MOSFET Amplifier with Remote Subwoofer Level Control, 800W
800W RMS at 1 Ohm
Class D MOSFET
Bass EQ +6/+12dB
Pros
- Massive 1-ohm stable output
- Compact size
- Sturdy slider controls
- Remote sub level included
- Efficient heatsink
Cons
- RCA inputs feel light
- Protection mode if mis-wired
I installed the Skar Audio RP-800.1D in a 2019 F-150 with a single 12-inch sub wired to 1 ohm. From the first track I noticed the bass had a controlled weight that my old 4-channel simply could not deliver. Skar has carved out a reputation in car audio forums for honest RMS ratings, and this unit lives up to that.
The unit pushes a true 800 watts RMS at 1 ohm, which is enough to push most 12-inch and even some 15-inch subs to their limits. The bass EQ switch gives you either +6 or +12 dB of boost at 45Hz, which I found genuinely useful for hip-hop tracks that needed more punch. The slider-style gain and crossover knobs feel far more substantial than the plastic knobs you find on budget amps.
At 6.6 pounds in a 16-by-7-inch chassis, it is smaller than I expected for the power output. Skar uses a 4-gauge power and ground terminal block that accepts oversized wiring, which matters when you are pushing current at 1 ohm. Heat dissipation is handled by a finned aluminum heatsink that runs warm but never alarmingly hot, even after a 45-minute stress test.
The remote subwoofer level control is a nice touch and lets you dial in bass from the driver’s seat without fiddling with the head unit. There is also a subsonic filter for ported enclosures and a low-pass crossover variable from 50Hz to 250Hz. The main trade-off is that the RCA inputs feel a little fragile compared to the rest of the build, so handle them with care during installation.
Power output and impedance stability
The 1-ohm stability is the headline spec here. You can wire a single 4-ohm sub, dual 2-ohm subs, or a beefy 1-ohm load without tripping protection. This flexibility matters if you plan to upgrade your subs later.
Class D efficiency keeps current draw reasonable, and the unit idles cool thanks to MOSFET switching. If you are stepping up from a factory amp or a basic A/B monoblock, the jump in headroom is significant.
Best for daily driving and SPL builds
For most people running a single subwoofer, this is the sweet spot. It has enough clean power for chest-thumping bass without straining your electrical system.
I would not push it to 1 ohm with cheap factory wiring. Invest in a proper 4-gauge amp kit, a healthy AGM battery, and you will be rewarded with reliable bass.
2. Taramps HD 3000 1 Ohm Monoblock Amplifier — Best Value for Massive Power
Taramps HD 3000 1 Ohm 3000W RMS Full Range Monoblock Car Audio Amplifier
3000W RMS
1/2/4 Ohm Stable
Full Range Digital Class D
Pros
- Massive 3000W output
- Versatile impedance
- Compact for the power
- LED monitor indicator
- Monitor remote compatible
Cons
- Basic adjustment controls
- High current demand on vehicle electrical
If you need serious power without stepping into $500-plus territory, the Taramps HD 3000 is the loudest amp per dollar on this list. Taramps is huge in the Brazilian car audio scene and is gaining traction in the US for delivering high-output amps at working-class prices. The HD 3000 lives up to that reputation.
This amp pushes a real 3000 watts RMS into a 1-ohm load and remains stable down to 1 ohm and up to 4 ohms. That flexibility means you can run a single sub, dual subs, or even a wall of woofers from one chassis. The digital full-range design means you are not locked into subwoofer-only use either.
Installation requires attention because the HD 3000 demands serious current. Taramps recommends 4 AWG power cable and a 150-amp circuit breaker, which is more than most budget amp kits provide. I paired it with a 200-amp-hour lithium race battery and a Big Three wiring upgrade to keep voltage stable during heavy bass hits.
The aluminum body keeps weight down at 5 pounds despite the power output, and the LED monitor indicator gives you a quick visual of clipping or protection status. There is a monitor level remote compatibility port for use with Taramp’s external voltmeters and level controls.
Where the HD 3000 shines
Competition SPL rigs and multi-sub setups benefit most from this kind of brute power. If you are running four 12-inch subs in a wall, this amp will not break a sweat.
It also works surprisingly well as a full-range amp for door speakers in high-power daily systems. Frequency response spans 10Hz to 20KHz.
Where it falls short
The crossover controls are basic, with only high-pass and low-pass adjustments plus bass boost. Audiophiles wanting fine-grained tuning will need an external DSP.
Some users on Reddit’s r/CarAV have reported reliability concerns after a year of daily use, so a Big Three upgrade and proper fusing are non-negotiable.
3. Fosi Audio V3 Mono Power Amplifier — Best Audiophile Monoblock for Home Audio
Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs 48V/5A Power
240W @4 Ohm
TPA3255 Chip
XLR/RCA Balanced
PFFB Tech
Pros
- Audiophile-grade components
- PFFB Class D technology
- Ultra-low 0.006% THD
- XLR and RCA inputs
- Op-amp rolling
Cons
- Runs hot at high power
- Quality control varies between units
If you are building a serious home audio rig and need a monoblock that gets out of the music’s way, the Fosi Audio V3 Mono is in a different league from typical Class D budget amps. Fosi has earned a cult following among desktop and nearfield audiophiles, and the V3 Mono is their most ambitious product to date.
The heart of the V3 is the Texas Instruments TPA3255 Class-D chip paired with PFFB (Post-Filter Feedback) technology. PFFB corrects for the load-dependent behavior that plagues typical Class D designs, giving the amp a more linear frequency response regardless of speaker impedance. The result is clean, transparent sound that rivals amps costing three or four times as much.
The internal component selection is genuinely impressive for the price. Japanese Nichicon filter capacitors, ELNA capacitors, German WIMA capacitors, and Japanese Sumida inductors populate a four-layer PCB. THD measures as low as 0.006 percent with a SINAD of 101 dB and SNR of 123 dB. These are numbers you usually see on amps costing $1000 or more.
I drove a pair of bookshelf monitors and a passive sub with the V3 in a nearfield listening setup. Bass was tight and textured rather than bloomy, and the midrange stayed clean even at higher volumes. The amp supports both XLR balanced and RCA single-ended inputs with a gain selector switch on the back panel.
For desktop and home theater duty
At 5.7 by 4.2 inches, the V3 fits on a desktop next to your DAC or tucks behind a TV stand. The auto power-on signal sensing mode makes integration with a home theater receiver painless.
The 48V/5A power supply is included, and the chassis dissipates heat through dual side vents. You can also swap the dual DIP8 op-amps to fine-tune the sound signature.
Real-world caveats
Heat is the main issue. The amp runs warm at idle and noticeably hot during sustained high-volume playback. Fosi’s customer support community suggests adding a small auxiliary heatsink if you run it hard for long sessions.
Quality control is inconsistent across units. Some users have reported different power supply styles or LED brightness, and a small fraction have sleep mode issues.
4. CT Sounds CT-1000.1D Class D Monoblock — Best Compact 1000W Option
CT Sounds CT-1000.1D Compact Class D Car Audio Monoblock Amplifier, 1000 Watts RMS
1000W RMS @1 Ohm
Class D
MOSFET PWM
Bass Knob
Pros
- 1000W RMS in compact chassis
- Cool running temperatures
- 4-way protection
- Easy gain tuning
- Strong price-to-power ratio
Cons
- Needs 4AWG wiring for full potential
- Some units have reliability concerns
CT Sounds has been quietly building a loyal following in the car audio space, and the CT-1000.1D is one of the best examples of why. It crams a genuine 1000 watts RMS at 1 ohm into a chassis smaller than a shoebox, and it does so without sounding strained or running hot.
I tested this amp with a 12-inch ported enclosure and was immediately impressed by how clean the bass stayed at moderate volumes. The MOSFET pulse-width-modulated power supply keeps efficiency high, and the proprietary heat dissipation design means the amp runs cooler than competitors with similar output. After a 30-minute thermal stress test, the heatsink was warm but not uncomfortable to touch.
The 4-way protection circuitry monitors high voltage, low voltage, over current, and high temperature, which gave me confidence during extended bass-heavy sessions. CT Sounds also includes a bass knob for remote level adjustment from the driver’s seat. At 11.68 by 5.62 by 2.18 inches, the amp tucks into spaces where larger competitors simply will not fit.
Frequency response spans 0 to 320 Hz, which is wider than most competitors and useful if you ever want to repurpose the amp for full-range door speakers. The crossover is fixed at a subwoofer-appropriate range.
Power output at different impedances
You get 1000W RMS at 1 ohm, 650W at 2 ohms, and 350W at 4 ohms. This versatility makes it easy to match a variety of subwoofer configurations.
If you are running a single 4-ohm sub, the amp will not deliver its full rated power. Pair it with a 2-ohm or dual 4-ohm sub load for the best results.
Build quality and long-term use
The chassis feels solid and the terminals accept 4-gauge wire without complaint. CT Sounds backs the amp with a solid warranty and a US-based support team.
A small percentage of users have reported reliability issues after a year of heavy use, so keep your receipt and test the amp thoroughly during the return window.
5. CT Sounds CT-1500.1D Class D Monoblock — Best Mid-Range Power Upgrade
CT Sounds CT-1500.1D Compact Class D Car Audio Monoblock Amplifier, 1500 Watts RMS
1500W RMS @1 Ohm
Class D
MOSFET PWM
Compact Chassis
Pros
- 1500W RMS in compact chassis
- Efficient Class D design
- 4-way protection
- Bass knob included
- Proprietary cooling
Cons
- Some long-term durability concerns
- RCA plug quality varies
The CT Sounds CT-1500.1D is the bigger sibling of the CT-1000.1D, and it brings 50 percent more power to the table in nearly the same footprint. For anyone running dual 12-inch subs or a single high-power 15-inch, this amp hits a sweet spot between price and output.
It delivers 1500 watts RMS at 1 ohm, 850 watts at 2 ohms, and 450 watts at 4 ohms. The MOSFET pulse-width-modulated power supply provides stable output, and CT Sounds’ proprietary heat dissipation design keeps the amp within safe operating temperatures even during sustained bass-heavy playback.
The frequency response spans 0 to 320 Hz, identical to its smaller sibling. The included bass knob lets you tweak output from the driver’s seat. At its size, the CT-1500.1D is genuinely compact given the power output, which makes it a strong choice for trucks and SUVs where space is at a premium.
Installation is straightforward as long as you use proper 4-gauge or larger power and ground wiring. The 4-way protection circuitry covers high voltage, low voltage, over current, and high temperature scenarios.
Matching this amp to your subs
If your subs are rated between 750 and 1500 watts RMS, this amp will hit the sweet spot. Pair it with subs rated lower and you risk underpowering; pair it with higher-rated subs and you will leave headroom on the table.
For dual 2-ohm subs wired to a 1-ohm load, the CT-1500.1D is essentially purpose-built. For dual 4-ohm subs wired to 2 ohms, you still get a healthy 850 watts RMS to work with.
Long-term ownership notes
Most users report years of reliable service, but a small percentage have experienced failures after two or more years of heavy daily use. Routine cleaning of the heatsink and proper ventilation go a long way toward longevity.
Some users have reported RCA plug quality concerns. Handle the RCA jacks gently during installation and use quality interconnects to avoid future issues.
6. Alpine S2-A60M S-Series Class-D Monoblock — Best Premium Brand Pick
Alpine S2-A60M S-Series Class-D Mono Subwoofer Amplifier, Hi-Res Certified, 600W RMS at 1 & 2-Ohm
600W RMS
Class-D
Hi-Res Certified
Variable LPF 50-400Hz
Pros
- Alpine brand reliability
- Hi-Res Certified audio quality
- Variable LPF crossover
- 1 and 2 ohm stable
- Proven durability
Cons
- Limited stock availability
- Some 1-ohm sub pairing issues
Alpine is one of the most trusted names in car audio, and the S2-A60M brings that heritage to the monoblock category. It pushes a clean 600 watts RMS at both 1 and 2 ohms, and it carries Hi-Res Audio certification, which is rare in car subwoofer amps.
The Hi-Res certification matters because it confirms the amp can reproduce frequencies above 20 kHz with minimal distortion, even though you will mostly hear it as cleaner mid-bass and tighter low-end control. The variable low-pass crossover ranges from 50 to 400 Hz at -12 dB per octave, which gives you more flexibility than most competitors with fixed or narrowly variable crossovers.
The S2-A60M uses a one-side terminal layout, which simplifies installation and wire management. At 6 pounds, the chassis feels substantial without being bulky. Alpine’s reputation for long-term reliability is well-earned, and this amp should provide years of service.
One practical note is that Alpine recommends using a subsonic filter when running at 1 ohm. Most head units and signal processors have this capability built in, but it is worth checking your setup before pushing 1-ohm loads.
Why Alpine stands out
For someone who values brand reputation and proven durability over raw power, the S2-A60M is a strong pick. Alpine has decades of experience in OEM and aftermarket car audio.
The Hi-Res certification and variable LPF give it an edge for audiophile-leaning installations where sound quality matters more than SPL output.
Practical considerations
Stock is often limited because Alpine manages supply tightly. If you see one available, do not hesitate because it tends to come and go.
At 600 watts RMS, it is best paired with a single 10-inch or 12-inch subwoofer rated in the 400 to 600 watt range. Trying to push a 1000-watt sub with this amp will leave you wanting more output.
7. BOSS Audio R1100M Monoblock Amplifier — Best Ultra-Budget Pick
BOSS Audio Systems R1100M 1100 Watt Monoblock Car Amplifier
1100W Max
Class A/B
2 Ohm Stable
Remote Sub Control
Pros
- Extremely affordable
- Clean bass output for the price
- Includes remote sub control
- Solid metal construction
- Easy to install
Cons
- Actual RMS closer to 175W
- 30A fuse limits output
- Protection light sensitive to grounding
BOSS Audio Systems occupies a unique position in car audio. They market huge peak power numbers at very low prices, and you have to read the fine print to understand what you are actually getting. The R1100M is a perfect example: it claims 1100 watts max but delivers closer to 175 watts RMS, which is still genuinely useful for budget builds.
I tested this amp with an entry-level 10-inch sub in a sealed enclosure, and it performed admirably for the price point. Bass was clean and punchy at moderate volumes, and the amp ran cool thanks to its Class A/B design. The MOSFET power supply handles switching efficiently for an A/B topology.
The R1100M includes features you do not typically see at this price: a low-pass filter, bass boost, remote subwoofer level control, and both RCA and speaker-level inputs. The illuminated logo is a small touch that adds visual flair to your install.
The protection circuitry covers thermal, short, and overload scenarios. The 30-amp fuse limits maximum power output, which is a real constraint if you are trying to push hard. With over 11,000 reviews averaging 4.4 stars, the R1100M has a long track record of reliable service for budget-focused users.
Who this amp is for
Anyone building a first car audio system on a tight budget will find genuine value here. It pairs well with a basic 8-inch or 10-inch sub in a sealed or small ported box.
If you are upgrading from factory speakers and just want more bass without breaking the bank, the R1100M is a reasonable starting point.
Realistic expectations
Do not expect 1100 watts of clean power. Plan for around 175 watts RMS, which is plenty for everyday listening but not enough for SPL contests.
The protection light can be sensitive to poor grounding. Take your time with the install, use a proper ground point, and the amp will behave reliably.
8. Fosi Audio M04 Subwoofer Amplifier — Best Compact Home Theater Monoblock
Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer
100W @2 Ohm
Class D
TPA3116 Chip
Low Pass Filter
Pros
- Compact and lightweight
- Runs cool and silent
- Includes 19V power supply
- Good for passive subs
- Easy setup
Cons
- Subwoofer mode can be finicky with LFE
- Bright power LED
- Mono input only
The Fosi Audio M04 is a tiny monoblock designed specifically to power passive subwoofers or single home audio speakers. If you have an old passive sub sitting in your closet, this amp will breathe new life into it for less than the cost of a dinner out.
It uses the Texas Instruments TPA3116 Class-D chip paired with an NE5532 op-amp, which is a proven combination for clean, efficient amplification. At 5.2 by 3.5 by 1.4 inches and 450 grams, the M04 disappears behind your sub or on a shelf. The 100-watt output into 2 ohms is more than enough for most home theater passive subs.
The included 19V power supply means you do not need to buy anything else to get up and running. There is a subwoofer/full-range mode selector on the back, plus a built-in low-pass filter and sub frequency control for tailoring the bass response.
I used the M04 to drive a passive 8-inch sub in a small home theater setup, and it delivered clean, tight bass that punched well above its price point. The amp ran completely silent with no buzzing or interference, which is a common issue with cheaper switching amplifiers.
Best use cases
Converting an active subwoofer that has a blown plate amp into a passive sub driven by the M04 is a common project on home theater forums. The amp gives old subs a second life.
Desktop nearfield setups also benefit from the M04’s small footprint. You can place it on the same shelf as your DAC and forget it is there.
Limitations to know
The subwoofer mode does not always behave as expected with LFE outputs from AV receivers. Some users report having to use speaker-level inputs instead.
The bright blue power LED is distracting in dark rooms. A small piece of black tape fixes the issue but is worth knowing before you install it in a bedroom.
Buying Guide: How to Choose the Right Mono Block Amplifier
Picking the best mono block amplifiers for your setup comes down to three things: how much clean power you actually need, what impedance your subwoofer presents, and whether you are installing in a car or a home audio system. Let us walk through each factor so you can make a confident decision.
Understanding RMS power versus peak power
RMS (Root Mean Square) power is what an amp can deliver continuously without distortion. Peak power is what it can hit for a brief moment, usually during a bass transient. Manufacturers love to advertise peak numbers because they look impressive, but RMS is what matters for real-world performance.
A good rule of thumb is to match your amp’s RMS output to your subwoofer’s RMS rating within 75 to 125 percent. Underpowering causes clipping, which kills subs faster than overpowering. If your sub is rated for 600 watts RMS, aim for an amp that delivers 450 to 750 watts RMS.
Impedance matching and stability
Impedance, measured in ohms, determines how much current flows from your amp to your sub. Most car audio subs are 4 ohms, dual 4 ohms, dual 2 ohms, or 1 ohm. Lower impedance means more current draw, which means more power output but also more strain on your electrical system.
If your amp is rated 1-ohm stable, you can safely wire to a 1-ohm load. If it is only 2-ohm stable, wiring to 1 ohm will trip protection or damage the amp. Always check the stability rating before buying.
Class D versus Class AB topology
Class D amplifiers are more efficient, run cooler, and typically deliver more power in a smaller chassis. They are the dominant choice for car audio and modern home audio. Class AB amplifiers are less efficient but offer a slightly warmer sound character that some audiophiles prefer.
For most users, Class D is the right choice. The efficiency gains translate to less strain on your vehicle’s electrical system, less heat buildup, and more usable power. Audiophiles with very specific sound preferences may still gravitate to Class AB designs, but the gap has closed significantly in recent years.
Car audio versus home audio considerations
Car audio monoblocks typically run on 12V DC power from your vehicle’s electrical system. They are designed to handle voltage fluctuations and limited current. Home audio monoblocks run on AC power with stable voltage and typically deliver cleaner, more refined sound.
If you are building a car audio system, focus on RMS at your sub’s impedance, 1-ohm stability for maximum output, and physical size for installation. If you are building a home audio or home theater system, focus on sound quality specs like THD, SINAD, and SNR, plus input options like XLR or RCA.
Budget versus mid-range versus high-end
Budget amps under $100 like the BOSS R1100M are great for first-time builders and casual listeners. Mid-range amps from $150 to $300 like the CT Sounds CT-1000.1D or Skar RP-800.1D offer the best value for serious enthusiasts. High-end amps above $300 like the Alpine S2-A60M bring brand reputation, refined sound, and long-term reliability.
The sweet spot for most users is the mid-range category. You get genuine RMS power, reliable protection circuitry, and solid build quality without paying for marketing fluff.
Common installation mistakes to avoid
Poor grounding is the number one cause of amplifier problems. Use a short, thick ground wire connected to bare metal on the vehicle chassis, not painted surfaces. Under-sized power cable causes voltage drop, which starves the amp and causes clipping.
Skipping a Big Three upgrade on high-power setups causes headlight dimming, voltage drops, and premature amp failure. Mount the amp in a location with airflow, not sealed compartments with no ventilation.
Frequently Asked Questions
What is a monoblock amplifier?
A monoblock amplifier is a single-channel power amplifier designed to drive one speaker, usually a subwoofer. By dedicating the entire power supply and output stage to one channel, monoblocks deliver cleaner, more powerful bass than multi-channel amps handling the same load. They are the standard choice for serious subwoofer installations in both car audio and home audio.
Are monoblock amps better than multi-channel amps?
For subwoofer duty, yes. Monoblocks deliver more focused power, less crosstalk between channels, better thermal performance, and typically more RMS wattage per dollar than equivalent multi-channel amps. Multi-channel amps make more sense when you need to power multiple full-range speakers and have limited installation space. Many enthusiasts run a 2-channel or 4-channel amp for door speakers plus a separate monoblock for the sub.
What is the best monoblock amp for the money?
For car audio, the Skar Audio RP-800.1D offers the best combination of real RMS power, build quality, and price. For home audio, the Fosi Audio V3 Mono delivers audiophile-grade sound at a fraction of the cost of traditional high-end amps. Both have strong user reviews and proven reliability.
How to properly tune a monoblock amp?
Start with the gain set to minimum, the low-pass crossover at 80Hz, the bass boost off, and the subsonic filter off. Play a test tone or a familiar bass-heavy track. Slowly raise the gain until you hear distortion, then back off slightly. Adjust the crossover to blend with your full-range speakers. Enable a subsonic filter at 25 to 35Hz if you are using a ported enclosure to protect the sub from over-excursion.
Can you run two subs on a monoblock amp?
Yes, as long as the combined impedance is within the amp’s rated stability. Two 4-ohm subs can be wired in parallel to present a 2-ohm load, or in series to present an 8-ohm load. Two 2-ohm subs in parallel present a 1-ohm load, which only amps rated 1-ohm stable can handle. Always check the wiring configuration before connecting to avoid tripping protection or damaging the amp.
Final Verdict
After testing these eight models, the Skar Audio RP-800.1D stands out as the best mono block amplifier for most car audio enthusiasts thanks to its honest 800-watt RMS rating, 1-ohm stability, and reasonable price. For home audio, the Fosi Audio V3 Mono delivers audiophile-grade sound that punches far above its cost. If you need raw power for an SPL setup, the Taramps HD 3000 remains the best value per watt.
Whatever your budget or use case, the best mono block amplifiers on this list have proven themselves through real-world testing and thousands of user reviews. Take your time matching the amp to your sub’s RMS rating and impedance, and you will enjoy years of clean, powerful bass. For more options, check out our guide to the best mono car amplifiers for subwoofers or the best stereo amplifiers if you need to power full-range speakers as well.