subwoofer for audiophiles with the need to play up to upper bass
For audiophiles looking for
uncompromising accuracy in both bass and upper bass frequency range
and higher crossover frequency up to 250hz, our F8 subwoofer is
the ultimate choice. It features two light cone weight 8" drivers
with our Direct Servo technology to ensure accuracy and definition.
FM8 is a variant of F8 subwoofer with a slightly different extension
filter arrangement. The Low-music and Low-HT positions on the extension
filter allows FM8 to be used as a regular subwoofer. The "high"
position implements a 4th LR filter to allow FM8 only play down
to 50hz and crossover to low bass subwoofer unit at 50hz (for instance,
the 50hz/24 setting of our larger subwoofers). For upper end extension,
this sub is designed to effortlessly play up to 250hz . Customers
should note signals above 80hz can be localized and therefore placement
is important if FM8 is used above 80hz. While there are already
many subwoofers on the market which can play deep bass, their sound
quality and transient response degrade as the frequency goes up
above 120hz. FM8, when used as a subwoofer, can cover more than
a decade of frequency range of servo control from below 20hz to
Direct Servo Technology
You may have heard about other
servo subwoofers which are generally well regarded for their accuracy.
It is a well established technology, most often based around an
accelerometer which measures cone movement. Our Direct Servo technology
has significant advantages over other
servo technologies. We use a sensing servo coil which acts like
a microphone which compares the original signal to what the subwoofer
is actually reproducing. The signal is then corrected instantly
to compensate for any differences. Once you understand the concept,
you may wonder like we do why anyone would make a subwoofer any
All our subwoofers use our patented Direct Servo technology. The most significant benefit is that it provides high end performance at an affordable price. Conventional subwoofers require heavy drivers in order to achieve deep bass extension. Direct Servo allows the use of a lighter driver which is more efficient so that a very high powered amplifier is not necessary. At the same time, Direct Servo reduces detrimental memory effects which detracts from the realism of reproduction.
Some of the benefits of Direct Servo include:
- Reduction of the effects of 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 memory
effects, such as spider hysteresis and creep effect of surround
material, is reduced, further improving transient response
- The effective Q value is 0.3 resulting in much tighter and accurate bass than conventional designs
- Dramatic reduction of the re-radiation of bass from inside the box
Many audiophiles aren't aware of all of these issues, but we believe they are critical to the design of an accurate subwoofer. While it's not necessary to understand them to enjoy accurate bass, for those who wish to understand how we do it, we have articles to describe our unique approach.
Read more about Direct Servo in our technology section.
View animation demonstrating how Direct Servo works
View animation demonstrating the reduction of bass re-radiation
Better value through intelligent design
FM8 uses two Hypex Ucd class D modules in the
power amplifier with each module independently driving an 8"
driver. Hypex Ucd modules are considered as one of the best sound
quality class D modules available. The standard amplifer is HX580
(300WRMS x 2 for a total of 600WRMS), It has one RCA and one mini-XLR
input. The quickguide of the FM8 can be found
here . Three different finishes are available: piano black,
black matte vinyl, and black oak vinyl. Price includes shipping
to 48 US continental states only. Shipping to other region or country
should inquire us for actual cost.
FREE SHIPPING to 48 STATES
||FM8-SE dual 8" subwoofer
with piano black finish
||FM8-BO dual 8" subwoofer
with black oak finish
||FM8-BM dual 8" subwoofer
with black matte finish