> Home
> Products
> Technology
> Plans & DIY
> Ordering
> Reviews
> About us
> Contact






  F15HP Direct Servo subwoofer
15" high power sub


Finesse meets brute force

We've introduced our HP series to satisfy the needs of customers with larger rooms and those who want greater bass impact. Our HP subs offer two advantages when compared to our other subs. The first is 2 dB higher output. At bass frequencies, every 6 to 10 dB increase sounds twice as loud (the actual number varies with listeners). So the 2 dB increase with our HP series will sound around one third louder. The second benefit is an increase in perceived authority and impact. When a subwoofer amplifier reaches it's limits, clipping occurs. This tends to reduce the dynamics and authority of the sound. Our HP subs can play cleanly where our other subs are operating at their limits. The difference is felt as much as it is heard.

There are other "brute force" subs on the market, but what our HP series achieve is a combination of brute force and finesse. Now the articulate and dynamic bass that our other subs have become known for is available with greater punch.

Direct Servo Technology

All our subwoofers use our patented Direct Servo technology, providing high end performance at an affordable price. It allows us to use lighter and more efficient drivers and still achieve deep bass without using excessive amounts of power. The servo reduces memory effects, counteracts thermal compression and various forms of driver non linearities.

You can read about Direct Servo in more detail in our technology section.

View animation demonstrating how Direct Servo works >

H600PEQ3 Amplifier and DS1510 Driver

F15HP uses our new high power H600PEQ3 servo amplifier and DS1510 driver. DS1510 features anodized aluminum cone, a 3" voice coil, and 200 oz magnet. Its linear excursion range has increased to +/- 20mm (from +/-15mm of DS1501). The entire subwoofer is 12lbs heavier.

The quickguide of the PEQ3 amplifier for sealed subs can be found here . PEQ3 amps do not have high pass filter RCA output. The response curves with various extension frequency/damping combinations of both amplifiers can be found in our EQ page.

The feet are sold separately. Black cones are made of anodized aluminum. Price includes shipping to 48 US continental states only. Shipping to other region or country should inquire us for actual cost. Black oak and black matte are on sale for $1282.

  Description: FREE SHIPPING to 48 US continental STATES Price  
  F15HP black oak grain finish with H600PEQ3 amplifier and black cone driver $1282 buy it now
  F15HP black matte finish with H600PEQ3 amplifier and black cone driver $1282 buy it now

  Description: Other Options Price  
  Change to silver cone driver for one subwoofer $70 buy it now
  Upgrade to H600XLR2 (with one XLR in and one XLR out) $40 buy it now
  Upgrade to H600XLR3 (with two XLR ins) $40 buy it now

Spike Feet

Our subs can be placed directly on carpet floors or matching spike feet are available. These are 1.2" in diameter and 1.75" in height. The thread size is M10. Spike feet are not recommended on hard surfaces where we recommend the standard rubber feet which inlcuded in our subwoofers. Free shipping in the shopping cart is only valid when ordered and shipped with subwoofers.

  Description Price  
  Metal spike feet for carpet floor to match F15HP(4pcs) $45 buy it now