Dual driver sub
F25 matches the low frequency
output of our vented subs and for music use the output is even higher.
The dual driver design increases efficiency so that only half the
power is required for a given output level. Like our other high
output options, a 800WRMS amplifier is included.
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:
- 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 and thermal memory effects are 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
Read more about Direct Servo in our technology section.
View animation demonstrating how Direct Servo works
The standard amplifier of F25 is H800XLR3.
It has two Hypex 400WRMS power amplifier modules in one heat sink
so that each module independently drive one driver with servo control.
The quickguide of the H800XLR3 amplifier for sealed subs can be
found here. Regular
price is $1499. It is on sale for $1399 (price reflected in shopping
cart). We currently only ship these to within 48 continental states
via UPS freight. These subwoofers are very heavy so we will include
furniture mover pads (for either carpet or hard floor). Customers
can only select one of them. Limited silver cone drivers are available
for $50 extra.
The feet are sold separately. Black cones
are made of anodized aluminum. Silver cones are made of non-anodized
aluminum in order to retain the shine.
F25 comes with a grille (not shown in photo).
These subwoofers are shipped via UPS freight. They are not time
definitive. So we cannot guarantee delivery time. In addition, the
shipping charge of $180 per sub is valid for business address delivery
without the need of lift gate service. For residential delivery
with a lift gate service, UPS now charges us $220 for both. It is
an issue starting happening this summer. We are now looking for
another carrier with more reasonable delivery charge. For single
F25 subwoofer purchase, please do add the residential delivery/lift
gate to the shopping cart (which we cover half of what UPS charges
us on residential delivery and lift gate service). For multiple
subwoofer purchase, we can cover this charge at our cost.
delivery/lift gate for Single F25 purchase
||F25 black oak with black aluminum
cone drivers and H800XLR3 amplifier
||F25 black oak with silver
aluminum cone drivers and H800XLR3 amplifier (back order)
|| 2 large furniture
mover pads for carpet (add-on for F25 order)
|| 2 large furniture
mover pads for hard floor (add-on for F25 order)