Details

---

Overview

LFE meets accuracy and control

FV18 is our answer to the need for a high power home theatre solution that retains the dynamic and accurate bass that we have become known for. Correctly integrated, our vented subwoofers can achieve the tight bass normally associated with a sealed enclosure, yet with greater low frequency output. We recommend this subwoofer for systems in which home theatre has a high priority.

Direct Servo Technology

All our subwoofers use our patented Direct Servo technology. The servo enables precise control over the cone which is essential for tight, dynamic and accurate bass. It also counteracts many different driver non-linearities and allows us to use lighter drivers which avoid the need for excessive amounts of amplifier power.

Some of the benefits of Direct Servo include:

• Dramatic boxy sound reduction of the re-radiation of bass from inside the box
• Thermal compression are eliminated under normal operation
• Higher efficiency allowing output which would normally require a more powerful amplifier
• Deep bass extension can be achieved using a low mass driver with superior transient response
• Mechanical creep memory effects are reduced, further improving transient response
• The (temperature-independent) effective driver Q value is 0.1 resulting in much tighter and accurate bass than non-servo drivers with typical Q value of 0.3-0.5 (and even higher when voice coil becomes hot)

HX1000XLR3 Amplifier and DS1820 Driver

FV18 comes with a grille. The above photo is shown with grill taken off. It uses our new high power HX1000XLR3 servo amplifier and the standard metal cone DS1820 driver. DS1820 features anodized aluminum cone, a 3'' voice coil, and 240 oz magnet. Its linear excursion range is +/- 20mm.

The standard amplifier is HX1000XLR3. The quickguide of the XLR3 amplifier for vented subs can be found here . The FV18 installation guide can be found here . The response curves with various extension frequency/damping combinations of both amplifiers can be found in our EQ page.

The sub comes with standard screw-in rubber feet. Chrome spike feet are sold separately.

Paper Cone vs Metal Cone and Independent Lab Test Results

Standard FV18 version uses metal cone DS1820 for its stiffness and low distortion. The independent test lab site www.data-bass.com has published the max distortion numbers for our metal cone FV18 and F18. The F18 has lower distortion and yet more output than Velodyne DD18+ for 1/3 of the price. Paper cone like the one used in Velodyne DD18+ can be made lighter than metal cone and therefore improve outputs above 50hz by up to 3db with the sacrifice of slightly higher distortions. For those who are after the maximum headroom in HT application may consider the paper cone version FV18SW (with paper cone SW1825). The order links are towards the bottom of this page.


Features

• Patented Direct Servo technology
• 18'' black anodized aluminum high excursion driver
• Solid and very inert enclosure
• Bass extension controls allowing adjustment of bass extension and excursion control
• Selectable 12/24 db/octave crossover filter slope
• Balanced XLR connections for professional use (XLR version option)
• Parametric EQ
• Choice of finishes - black oak or black matte vinyl

Specifications

Driver	DS1820 18'' high excursion with custom sensing coil
Driver materials	One piece black anodized dish aluminum with rubber surround
	Cast aluminum basket
	Multiple aluminum flux de-modulation shorting rings
Amplifier	900W RMS Hypex class-D patented servo controlled
Dimensions	21''(W) x 33'' (H )x 22''(D) - (23'' D with grille and heatsink)
Shipping Weight	180 lbs (160lbs gross)
Frequency Response	12 - 200 Hz (-4db@12hz) with LFE input
	12 - 90 Hz (-4db@12hz) with LINE IN input
Multi-tune	16hz (3 port) and 12.5hz (2 port)
Crossover slope	Selectable 12 or 24 dB / octave (PEQ)
Crossover range (Low pass)	25 - 100 Hz
Rumble Filter (High pass )	12 Hz 18 dB / octave (-6db @10hz)
Phase adjustment	0 - 180 degrees continuously variable
Bass damping factor settings	high (Q=0.5), med (Q=0.7), and low (Q=1.1)
Finishes	Available in black matte paint or black oak vinyl
Warranty	5 years warranty on driver and 3years on electronics
	45 day home trial with customer paying one-way return shipping