ADS 310px Installation Manual page 2

the px story
using the
310px
2
Your 310px component subwoofer is the finest subwoofer ever from a/d/s/. Like other
models in the px system, the 310px sets a new standard of musical performance and precise
construction.
The philosophy behind px is to build products which are not compromised in any way by price
constraints or manufacturing simplicity. With all px series products, musical performance takes
precedence over all other considerations. Each design choice made during the engineering
process was made to provide optimum performance not attainable with conventional materi-
als and construction.
In the 310px, this philosophy results in a precisely machined frame of Aluminum, Brass, and
Stainless Steel. This frame is hand assembled to precise tolerances, assuring perfect alignment
of all of the moving parts. Additionally, the magnet and voice coil assembly are of an "under-
hung" design, which dramatically improves linearity and results in much lower harmonic dis-
tortion than with conventional woofers. The anodized aluminum cone and voice coil help dis-
sipate heat from the motor structure, thereby improving power handling and reducing dynam-
ic compression of the signal.
These improvements add up to make the 310px the most musically accurate low frequency
driver we have ever produced.
The 310px was carefully engineered for optimum use installed in a small sealed enclosure in
a typical automotive environment. The parameters were chosen to yield a gentle low fre-
quency rolloff, which combines with the typical vehicle transfer function to give extended low
frequency performance with excellent transient response. The optimum recommendations are
given in the specifications section of this manual.
The 310px may also be used in single-tuned bandpass or vented enclosures if different results
are desired, or if the application demands it. Using the 310px in a vented enclosure will typi-
cally give you higher SPL capability than in a sealed enclosure, but with the penalty of addi-
tional group delay and compromised transient response. Due to the effects of the vehicle's
transfer function, a typical vented enclosure will give you a slight bass emphasis above the
enclosures cutoff frequency, with a sharp rolloff below it. Most practical bandpass enclosures
will also share this characteristic, with the added disadvantage of signal compression and wind
noise through the port at high SPL. However, the vented option may be appropriate if you
value SPL above audiophile sound quality. A bandpass enclosure can sometimes be the best
choice if the bass must pass through a small panel, since you only need enough panel space
to pass the port through.