RCF SUB-708-AS-MK3
Best high-output subwoofer for mobile DJs and live event professionals.
The RCF SUB 708-AS mk3 is a high-power, portable active subwoofer engineered for demanding live sound environments. It features a robust 18-inch transducer paired with a powerful 1400 Watt Class-D amplifier, capable of achieving maximum sound pressure levels up to 133 dB with excellent headroom. This unit is designed to perfectly complement 8-inch or 10-inch main loudspeakers, ensuring outstanding low-frequency performance. Its construction utilizes a rugged, all-wood cabinet finished with a scratch-resistant polyurea coating for durability on the road. Rear panel controls offer precise tuning via volume, EQ, polarity, and crossover frequency selection, making it versatile for various applications.
$1699.00
Owner Satisfaction
4.7
/ 5
Category Rank
501
/ 6561
#501 in Speakers
Price vs Category Average
+16%
Above average
Who it's for
- Performers requiring punchy low-end in intimate acoustic or electronic settings
- Mobile DJs and musicians needing easy transport for small venues
- Sound engineers seeking seamless integration with existing RCF speaker setups
Who should skip it
- Budget-conscious buyers prioritizing raw output over compact, specialized design
- Producers of bass-heavy music requiring deep sub-50Hz frequency response
- Event organizers planning sound coverage for large-scale PA applications
Performance breakdown
Low-Frequency Output
The 18-inch transducer delivers deep, authoritative bass with significant sonic impact.
Amplifier Headroom
1400 watts of Class-D power ensures clean, distortion-free sound at high volumes.
Build Durability
Rugged wooden cabinet and polyurea coating withstand the rigors of touring life.
System Integration
Flexible crossover settings allow for seamless pairing with various main loudspeaker sizes.
Portability
Integrated handles make moving this heavy-duty subwoofer manageable for mobile setups.
Sound Control
Precise onboard EQ and polarity adjustments provide excellent tuning for any venue.
Features
- High-power performance with up to 133 dB SPL
- Integrated 1400 Watt Class-D amplifier for ample headroom
- Bass Motion Control excursion management for deep, controlled bass
- Includes stereo crossover and switchable crossover frequencies for flexible setup
- Durable, scratch-resistant polyurea coated wooden cabinet
- Equipped with polarity-reverse switch and electronic equalization
- Designed for easy portability with integrated handles
- Features convection cooling for reliable operation
What customers say
Customers consistently celebrate the RCF SUB-708-AS-MK3 for its exceptional portability and surprising power. The core theme is its ability to deliver clean, punchy bass in a remarkably small enclosure, making it ideal for mobile use and smaller installations. Reviewers praise the clarity and musicality of the low end, noting its seamless integration with full range speakers due to precise internal processing. Build quality is rated as professional and robust, reinforcing satisfaction. While it offers tight, defined low frequencies, users acknowledge the expected trade-off is the absence of ultra deep sub-bass rumble. Overall, this subwoofer is viewed as a top tier, high value investment for anyone needing powerful, compact bass reinforcement.
Know before you buy
This subwoofer is specifically engineered to complement 8-inch or 10-inch main loudspeakers. It provides the necessary low-end reinforcement to balance these smaller cabinets without overpowering them.
Bass Motion Control manages the excursion of the 18-inch woofer to prevent over-travel. This results in deep, punchy bass that remains tight and controlled even when you are pushing the system to higher volumes.
Yes, it is built for the road. The cabinet is constructed from wood with a scratch-resistant polyurea coating, and it includes integrated handles to make transport and setup easier for mobile DJs or live bands.
Yes, the rear panel features switchable crossover frequencies. This allows you to fine-tune the hand-off point between the subwoofer and your main speakers for a seamless frequency response.
No, the SUB 708-AS mk3 uses convection cooling. This design eliminates the need for internal fans, which keeps the operation quiet and prevents dust from being pulled into the electronics.
The polarity switch is used to align the phase of the subwoofer with your main speakers. If your bass sounds thin or 'hollow' when the system is set up, flipping this switch can often correct phase cancellation issues.
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