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Rcf Sub 708-as Mk3 18" Active Subwoofer

Rcf Sub 708-as Mk3 18" Active Subwoofer
  • Product Code: eq142252
  • Availability: In Stock

$5,097.00 $7,696.47

Designed to complement the ART-Series or any full-range speaker, the RCF SUB 708-AS MK3 is a portable 18" high-powered active subwoofer well suited for bands, DJs, clubs, touring companies, and rental houses.

The subwoofer's integrated Class-D amplifier delivers 1400W of peak power to the 18" driver, which offer a frequency response of 35 to 120 Hz with a maximum SPL of 133 dB, making it great for small to midsize venues and touring applications. Rear-panel controls include volume, EQ, polarity, and crossover frequency selection. The rugged all-wood cabinet with scratch-resistant polyurea coating makes it durable, easy to carry, and install securely.

For Small to Midsize Venues    Great for Portable Applications    1400W Class-D Digital Amplifier    18" Woofer, 3" Voice Coil    Stereo Crossover, Switchable Frequencies    133 dB Max SPL    Baltic Birchwood Bass-Reflex Housing    Phase-Reversal Switch    Electronic EQ, Soft Limiter, Protections    Stereo XLR 3-Pin I/O

Key Specs
ConfigurationActive Subwoofer
Enclosure Type Subwoofer
Total Power Capacity700 W RMS
1400 W Peak
HF DriverNo
MF DriverNo
LF Driver1x 18" / 457.2 mm Inverted Woofer
Wireless ConnectivityNo
ColorBlack
Parameters
Enclosure Type Subwoofer
Total Power Capacity700 W RMS
1400 W Peak
Amplifier ClassClass-D
Drivers
HF DriverNo
MF DriverNo
LF Driver1x 18" / 457.2 mm Inverted Woofer
LF Voice Coil3" / 76.2 mm
Performance
Frequency Response35 Hz to 120 Hz
Maximum SPL133 dB
Input Sensitivity+4 dBu to -2 dB
ProtectionsRMS, Thermal
Connectivity
Audio I/O2x XLR 3-Pin Female Balanced/Unbalanced Link Input
2x XLR 3-Pin Male Balanced/Unbalanced Link Output
Network I/ONo
USB I/ONo
Wireless ConnectivityNo
BluetoothNo
Mobile App CompatibleNo
Signal Processing
CrossoverLow-Pass:
80 Hz
High-Pass:
110 Hz
EQYes
Parametric EQNo
Semi-Parametric EQNo
Dynamic ProcessingSoft Limiter
Alignment DelayNo
Phase AdjustmentYes
Power
AC Input Power100 to 120 VAC, 50 / 60 Hz
220 to 240 VAC, 50 / 60 Hz
AC Power I/O1x IEC Input
Physical
ColorBlack
Mounting1 x 1.4" / 35 mm Pole Socket (Top)
Handles2x Side
Construction MaterialPlywood, Steel
Dimensions27.2 x 26.9 x 19.8" / 69.1 x 68.3 x 50.3 cm
Weight88.2 lb / 40 kg
Packaging Info
Package Weight100 lb
Box Dimensions (LxWxH)29.25 x 29 x 22"

  • 1400W peak (700W RMS) Class-D amplifier
  • 18” woofer, bass-reflex housing
  • 35 to 120 Hz frequency response
  • 133 dB max SPL
  • Stereo crossover
  • Switchable crossover frequencies
  • Polarity-reverse switch
  • Electronic equalization, soft limiter, and protection
  • Stereo XLR input, Stereo XLR signal output
  • Bass Motion Control excursion management

RCF subwoofers are the first choice of many sound engineers, thanks to the very high SPL levels at very low frequencies, small dimensions compared to the competitors, self-powered design, long-term reliability, and impressive size/weight to SPL output ratio. Your crowd will be able to live an engaging immersive experience in both live sound or DJing applications.

  • RCF's improvements in transducer design make them stronger and more powerful, so the amplifier follows the evolution. With 1400W peak power, the Class-D amplifier manages extreme sound-pressure levels with an ultrafast attack, realistic transient response, and very low heat loss. The speaker design is energy-efficient, so there's no need for a cooling fan.
  • The amplifier is attached to a solid aluminum heat exchanger in the rear of the cabinet with no moving parts. The stereo input circuit with crossover features a new low-distortion design with an advanced safety limiter, maintaining the true character of the input signal at all levels. RCF amplifiers are designed according to EN62368-1 for maximum safety and present a switched-mode power supply section joining high-efficiency with minimum weight.

SUB 7 Series subwoofers can be configured from the rear panel, and features a full set of commands:

  • Crossover presets: 80 Hz / 120 Hz
  • Polarity reverse
  • Out Signal: line / high pass

  • When searching for an extended bass with enhanced performance, RCF engineers found a way to remove the high-pass filter, replacing it with a forward-thinking approach. Introducing BMC (Bass Motion Control), the newly advanced woofer excursion management feature. The speaker, equipped with BMC, can handle the lowest audible frequencies without affecting the woofer stability, with extended linearity and better sound integrity.
  • The BMC method works by creating a complete map of the dynamic behavior of the woofer, to generate a custom algorithm that only limits overexcursions. This gives total freedom of signal reproduction to the transducer. When high-pass filters normally protect the woofer motion from becoming destructive but change the phase behavior, the new BMC algorithm breaks conventional rules.

  • The subwoofer is suitable for a wide range of live sound applications. The rugged all-plywood cabinet is easy to carry and stack due to its light weight. All are equipped with ergonomic handles with rubber grips for easy setup and teardown. The M20 threaded pole mount on the top allows the cabinet to support speakers with a pole mount.
  • The heavy-duty polyurea coating, the powder-coated metal grille, and the rugged structure of the cabinet withstand long-term use and transportation. Separate housing for the amplifier guarantees component efficiency and reliability. An acoustically transparent sound foam backing on the inside of the grille ensures protection from dust and humidity. With its frontal vented ports, the subwoofer can also be used in recessed spaces.

Related Questions and Answers

Q: 1. Could one replace the Mini Rotator with a different one (CAVIX DH-55D Panoramic Panorama Indexing Rotator Ball Head ) ? If so, would its capacity increase to 5-7 lbs?

A: As per the manufacturer, a custom modification in not recommended and void the warranty.

Q: 2. I'm planning to use this SSD to record raw video in the Blackmagic Cinema Camera 2.5k. I'd like to confirm that the MK3 it's capable of doing that flawless without dropping frames, because the one in BMD approved list's for BMCC 2.5K it's the previous model, MK2. Thanks! ?

A: If the Mark II model worked, we believe this Mark III should work as well. Please keep in mind that Blackmagic has not updated that list since 2017, they have not tested more recent releases with the Cinema Camera 2.5K. We cannot confirm this drive will work flawlessly, but we feel that it should.

Q: 3. Does this printer comes with paper already loaded or you will have to buy printing paper separate?

A: You will have to purchase and load the paper yourself. The process is pretty easy though

Q: 4. Would this be appropriate for k1+15-30. If not could you suggest another model?

A: This model will work for that combination.

Q: 5. What are the main differences between X-Active 8x25 and the older Minox BV 8x25 (62059) they replace? I compared the specs and can see the X-Active are a few ounces lighter but not much else. Are there any differences in terms of optics?

A: Its a newer coating and a newer procedure on putting the coatings on. Better image color results and improvement in light transmission

Q: 6. Does this work with the URSA Mini Pro G2?

A: No the URSA Mini Pro G2 takes CFast 2.0 Cards and SDXC UHS-II Cards.

Q: 7. will it work with Adobe Lightroom ...?

A: Yes you can print from Adobe Lightroom 5.

Q: 8. Where are these made?

A: This pair are made in China.

Q: 9. can I use the 32 bit motu traveler with my 64 bit macOS?

A: Yes, the MOTU Traveler-mk3 FireWire Audio Interface can be used with a 64-bit macOS system. In this scenario, the 32-bit float point recording capabilities of the Traveler are a separate specification to the Mac's 64-bit application processes. The MOTU Traveler-mk3 has the following system requirements for macOS: -G4/500Mhz Power Mac or faster equipped with at least one FireWire port -At least 256 MB of RAM (512 MB or more is recommended) -Mac OS X (version 10.4.9 or later) -A large hard drive (preferably at least 100 GB)

Q: 10. Will the Canon r5 fit this or is it better to get NN6?

A: While the Nodal Ninja 6 with Nadir Adapter would be a great option with more flexibility and would give you the ability to use a larger range of lenses, yes, the Canon EOS R5 Mirrorless Digital Camera and a lens up to 200mm would be compatible for use with the Nodal Ninja NN3 MK3 with Lower Rotator D10 Package.

05/09/2024

[100 lb] I tried 3 different subs over the last year to blend with my Focal Shape 50s. I didn't want to buy the Sub6, as it would't quite be a good fit for my space, so I tried other brands. None of them blended well and I ended up returning them. It took a little while to find the optimal phase adjustment, which I did by using a spectrum analyzer with a very slow response. The crossover ended up being 60Hz, which gives me a very smooth extension down to about 35Hz or so, allowing me to hear the sub frequencies and lowest notes of kick, bass and other instruments. They blend very well with the Shape 50s. It is worth mentioning that bass trapping is highly recommended, particularly when using a SUB. I also have Sonarworks to compensate for some residual room modes.

5
28/08/2024

[+4 dBu to -2 dB] Ordered this through trusty B&H and although is not a stocked item and says 2-4 weeks, I received this in less than 10 days from the Distributor. Lots my RCF 745 perfectl. Only wish is that it covered the bottom too, but it is a 'cover not a bag.

5
28/07/2024

[Black] Very detailed sound, compared with genelec 7040a, jbl, Khali Audio, others just booming, but focal sub one gives very detailed bass, highly recommended

5
23/07/2024

[100 lb] Provides excellent protection with easy access to side and top carrying handles. You can even access the front and rear of the mounted speaker without removing the entire cover if you want. I'm really glad I purchased these.

5
11/07/2024

[1x IEC Input] Good design and quality to protect Rcf speaker .

5
25/06/2024

[Soft Limiter] I wanted to purchase this for about 2 months ..I knew I wouldn't go anywhere else except to B&H...service n check out is simple n easy ...B&H for all my electronic needs and wants

5
13/06/2024

[1x IEC Input] The RCF CVR 003 fits the 8003-A MKL3 sub so well. The amazing thing about this case is that you never take it off the sub! You unzip the part of the case that covers the speaker grill, fold it back to a velcro fastener and voila, you're ready to rock! It also has cut outs that fold back if you have installed the casters on the sub, and a cut out for the controls and connectors on the back. The part of the case that sits on the ground under the weight of the sub has 4 rubber pads so that that if you slide it around, the case doesn't get torn. Good job RCF!

5
27/05/2024

[RMS, Thermal] I just used two of these with two QSC K10.2s and they were banging so loud; I loved it! All of my guests really enjoyed it too. The bass is really great and the cross-over options are even better. I would definitely recommend these and I highly recommend buying these direct here, from B&H Photo; amazing customer service team!

5
19/05/2024

[Black] Our company uses several differnt brands of PA and subwoofers, and we have been extremely impressed with this unit. Extraordinarily high outout, no distortion, lots of configuration options, and powered. These units are at least as good (if not better) than our single 18 subs from L'Acoustics, Martin, and D&B. We have 16 of them, and they are quickly becoming our first choice for that type of sub. They are a bit heavy, but it is likely a byproduct of how rock solid they are. Very recomended unit.

5
16/05/2024

[ Subwoofer] My live band loves the addition of this sub. It provides warmth and fills the sound. We play acoustic guitars, cajon, vocals. I recommend it.

5

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