F12SE has received Secret of HT and HI 2020
Best Subwoofer Award. Click the award for the article.
The standard amplifier is A370XLR3. (370WRMS
with both RCA and XLR inputs).
The quickguide of the A370XLR3 amplifier
for sealed subs can be found
here . A370XLR3 amps do not have high pass filter RCA outputs.
But it does have dedicated LFE inputs allowing for easy integration
of a 2-ch-plus-HT system setup.
A370PEQ3 has both speaker level inputs and LFE/LINE
RCA inputs for those with AV receivers. A370PEQ amplifiers are available
for those who still need high pass filter (or HPF) RCA outputs.
The response curves with various extension frequency/damping combinations
of both amplifiers can be found in our EQ page.
Manual for each amplifier choice is available below in documentation
section.
For those who are on a tight budget, we
do offer F12-400. The frequency response
plots of that model can be found on the same page.
The sub comes with screw-in rubber feet.
Spike feet are available as add-on for $25 with no extra shipping
cost.
Black cones are made of anodized aluminum.
Silver cone driver is available for $50 extra. Price includes
shipping to 48 US continental states only. Shipping to other region
or country should inquire us for actual cost. Due to tariff increase,
we have reduced the mult-sub discount to 5%.
Our speaker level inputs are only compatible
with power amplifiers having single ended outputs with black lead
output labelled as "COM", "GND", or "Ground".
Wyre4sound power amplifiers and others with differential outputs
are not compatible. These amps need an XLR type 3-wire (one positive,
one negative, and one ground) for safe speaker level input operation.
Using Y-splitter on input connection increases
the subwoofer gain by 6db. High efficiency horn speakers (105db/Wm
and above) may require custom modification for "gain matching"
of the volume control knob (not to be mistaken as sub not keeping
up with horn speakers) when this connection method is not option
(e.g., single sub accepting both L and R inputs). To summarize,
customers who need to consider higher gain are those with all these
conditions: 1) has high efficiency horn speakers, 2) has no AVR
or pre-processor, and 3) cannot use Y-splitter to connect to multiple
inputs on a sub to increase gain by 6db. Please select "High
gain" option in the order.
Efficiency of newer Klipsch horn speakers
are overrated by 6db and not an issue for gain matching. Please
inquiry us when using our subs with horn speakers if you are not
sure what to do.
Shipping is included only for 48 US states
with additional shipping charge for other areas. Upcharge per subwoofer
to Canada with prepaid tax is now added.
Documentation:
A370PEQ Quickguide
A370PEQ3 Quickguide
(limited qty)
A370XLR2 Quickguide
A370XLR3 Quickguide
Integration guide
Warehouse
will be closed between Sep 24 and Oct 16. There will be no shipping
from us and Ascend Acoustic during this period of time.
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Description:
Standard A370XLR3 amp (with RCA and XLR inputs, but no speaker
level inputs) |
Price |
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F12 Black Oak Grain with A370XLR3
amp (with both LFE and Line RCA inputs) (back order till
early Nov) |
$1139 |
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F12 Black Matte with A370XLR3
amp(with both LFE and Line RCA inputs) (back order till early
Nov) |
$1139 |
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Description:
Other Options (amps such as A370PEQ, , XLR2) |
Price |
|
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High gain option to match
horn speakers |
$20 |
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Upgrade to A370PEQ with HPF
outputs for those without bass management |
$50 |
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Upgrade to A370PEQ3 amp with
RCA and speaker level inputs (limited qty) |
$50 |
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Upgrade to A370XLR2 (with
one XLR in and one XLR out) |
$50 |
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A set of black coated metal
spike feet (add-on only at time of sub purchase) |
$40 |
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A set of black coated metal
spike feet (purchase without sub) |
$50 |
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The
subwoofer for audiophiles
For audiophiles looking for
uncompromising accuracy, our F12 subwoofer is the ultimate choice.
It features our Direct Servo technology to ensure accuracy and definition.
As an audiophile you appreciate that bass is the foundation of a
satisfying music or home theater experience. You also appreciate
that there is more to a home theater subwoofer than shaking the
room, and that music can be far more satisfying with a subwoofer
that can play deep.
What makes our subwoofers suitable for audiophiles? It's not that they can plumb the depths with authority. There are already many subwoofers on the market which can do that. The difference is that they reproduce bass with a level of realism that is normally only associated with much more expensive high end full range loudspeakers.
What is the difference between F12 and F12G? Read our comparison
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 other way.
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 and thermal memory
effects are reduced, further improving transient response
- The effective in-box Q value is 0.3 with
enclosure (0.13 for driver itself), resulting in much tighter
and accurate bass than conventional designs with typical in-box
Q value of 0.8-0.9 (and even higher when voice coil becomes hot)
- 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
Many of our customers marvel that we are able to produce such exceptional subwoofers at such a low price. One Direct Servo technology makes it possible, allowing us to get the most out of a 12" driver without the need for kilowatts of power. Don't be fooled into thinking that other more expensive subwoofers with much more powerful amplifiers will offer more output. The output of a subwoofer is determined by how much air the driver can displace, not the power rating of the amplifier. We could supply a more powerful amplifier, but there would be no increase in output, only extra cost.
To understand further how this works, you may
wish to read our article on smart Q.
Continue to Options & Features
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