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  FV15HP Direct Servo subwoofer
15" ported audiophile sub with 600WRMS amplifier
Performance & Specifications

FV15HP has two port openings. With two ports open, the max extension is 18hz and the rumble filter should be set to ON/2 position. In the following is the frequency response when extension filter is set to 14hz and low damping.

sealed response

Fig 1.0 - FV15HP Frequency response chart in AVR/12 low pass filter setting and both ports open

To achieve lower group delay and lower bass extension at 12hz, customer can plug one of the ports and set the rumble filter position to OFF/1. In the following is the resulting frequency response with extension filter set to 14hz and low damping.

sealed response

Fig 1.1 - FV15HP Frequency response chart in AVR/12 low pass filter setting and one port open

The level matching between two port mode and one port mode is very good as shown in the following figure when the volume setting is unchanged and the rumble filter setting is at ON/2 and OFF/1, respectively.

sealed response

Fig 1.2 - FV15HP level matching level two port and one port modes when the rumble filter is set ON/2 and OFF/1, respectively

FV15HP also provides an LFE mode that extends the upper end to 200hz as shown below.

sealed response

Fig 1.3 - FV15HP LFE mode response with two port


One important aspect of getting a correct integration is phase alignment. We have written a guide on how to achieve a phase aligned subwoofer. More >


Driver DS1510 15" high excursion with custom sensing coil
Driver materials Black anodized aluminum with rubber surround
  Cast aluminum basket
  Copper flux de-modulation shorting rings
Amplifier 600 RMS class H patented servo controlled
Dimensions 18-1/4"(W) x 24-1/2" (H )x 24-1/4"(D) - (26-1/2" D with grille and control knobs)
Shipping Weight 130 lbs (gross weight 115lbs)
Frequency Response 12 - 200 Hz (-2 dB @ 17 Hz, -6db@12hz) with LFE input
12 - 90 Hz ((-2 dB @ 17 Hz, -6db@12hz) with LINE IN input
Multi-tune 18hz (2 port) and 12hz (1 port)
Crossover slope Selectable 12 or 24 dB / octave (PEQ)
Crossover range (Low pass) 25 - 100 Hz
Rumble Filter (High pass ) 18 Hz 18 dB / octave for two port tuning
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 vinyl or black oak vinyl
Warranty 5 years warranty on driver and 3years on electronics
  45 day satisfaction guarantee