ADS 310px User manual

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.
2
the px story
using the
310px

While the 310px is very rugged in use, some aspects of its design require careful handling
during installation. In particular, the voice coil is vented below the spider. This improves
power handling and linearity, but it also provides a path for particles to become lodged in
the voice coil.
• Keep the 310px in its protective plastic bag until you are ready to install it.
• Keep the unit away from sawdust and metal shavings.
•Thoroughly vacuum the inside of the enclosure before installing the woofer to
remove any sawdust or wood shavings.
•If using fiberglass or polyester filling in the enclosure, completely cover the rear of the
driver with a piece of cloth between the driver and the filling.
•Do not use wood screws to mount the woofer to the cabinet. Use "T"-nuts and
machine screws only.
• Do not press the dustcap! This will cause permanent deformation.
• Be careful handling the speaker frame to avoid scratching the cosmetic surface.
The 310px is unusually heavy and has very high capability. It demands above average enclo-
sure construction to perform at its best. We recommend that you construct the enclosure from
MDF or laminated Baltic birch plywood at least 3/4" (20mm) thick. Whenever possible, 1"
(25mm) thick material is preferred. Due to the unusual beauty of the 310px frame, you may
want to show it off with one or more panels made from clear acrylic. All acrylic panels should
be at least 1" thick. Use "T"-nuts and machine screws to fasten the 310px to the enclosure.
Make certain all of the joints and panels in the enclosure are airtight and rattle-free. Seal any
terminals or wire access holes completely. Seal the driver's mounting surface with foam tape.
Some applications may demand a different solution than the above recommendations allow.
For example, you may need to construct an enclosure from Fiberglass, Kevlar, or Carbon Fiber
in order to fit into an irregularly shaped cavity. When using these materials, try to keep any
unsupported flat wall surfaces to a minimum. Add bracing whenever necessary to keep the
enclosure walls from flexing under pressure.
3
warnings
and tips
enclosure
construction

Enclosure recommendations are given for enclosures with and without damping material as a
filler. Use of filler will yield the smallest enclosure size. If you are building with transparent pan-
els, you will probably not want to use any filler material, so use the "no-filler" enclosure rec-
ommendations. For sealed enclosures, or the sealed portion of a bandpass enclosure, the
design recommendations assume fiberglass or polyester damping material installed at a den-
sity of 12oz. per cubic foot. It is VERY IMPORTANT that you place a piece of reasonably fine-
textured cloth between the back of the driver and the filler material. A piece of grill cloth will
work. This will prevent any of the fibers from the filler material from becoming lodged in the
voice coil.
All vented enclosures, sealed enclosures with transparent sides, and the vented chambers of
bandpass enclosures should have all non-transparent cabinet walls lined with 1" thick foam
damping material.
The terminals used on the 310px will accept up to AWG#8 speaker cable. We recommend
using AWG #12 OFC copper wire to connect the 310px to the amplifier.
For the best contact:
• Do not tin the wire before inserting it into the terminal.
• Do not use any pins or other terminations.
•Do strip the wire approximately 1/2" and insert it into the terminal. The wire will
conform to the inside of the terminal to provide the best contact surface.
4
damping
material
wiring

The 310px is a dual voice-coil design. This allows great flexibility in system wiring, depending
on the number of woofers used and the capability of the amplifier. For the highest fidelity with
the a/d/s/ PXa, or other amplifier providing two channels of subwoofer output we recommend
the following connections:
5
wiring
diagrams
Number Impedance
of woofers to amplifier
1Connect individual voice coils to individual amplifier channels. 3 ohms
2Connect the two coils of each woofer in parallel and connect 1.5 ohms
each woofer to an amplifier channel
3Connect the coils of each woofer in series, connect the three 2 ohms
woofer in parallel, and connect to bridged amplifier channels
4Connect one coil from each of two woofer in series. Connect 4 ohms
the remaining coils of the same two woofers in series.
Connect the first and second coil pairs in parallel, and
connect to an individual amplifier channel. Repeat for the
second channel using the second two woofers.

6
specifications Thiele-Small
Free-air resonance fs= 29.9 Hz.
Equivalent Volume of Compliance Vas= 1.95 ft3
55.16 liters
Compliance Cms= .326 mm/N
Total Damping Qts= .46
Electrical Damping Qes= .52
Electrical Damping Qms= 3.67
Piston area Sd= 53.5 in2
345 cm2
Linear excursion Xlin +/- .37 in.
Peak Excursion Xmax +/- .59 in.
Sensitivity @ 2.83V RMS @ 1 M, Voice Coils parallel SPL= 94 dB
Sensitivity @ 2.83V RMS @ 1 M, Voice Coils series SPL= 88 dB
Efficiency no=. 28%
DC Resistance, each coil Re= 2.6 Ohms
Motor strength BL= 13.75 TM
Moving mass Mms= 86.55 g
Nominal Impedance Z= 3 Ohms
Recommended amplifier power range, each voice coil Min.= 20 Watts
Max.= 300 Watts
sealed box
volume
vented box
volume
vent diameter
vent length
in car -3dB point
max in -car
response peak
max group delay
in car max spl
@30Hz
40Hz
50Hz
60Hz
70Hz
80Hz
graph
sealed with
filling
.75 cu.ft
<20
0dB
[email protected]
108.5
113.7
118
121.2
124
126.4
A
sealed without
filling
1.0cu.ft
<20
0dB
[email protected]
109.4
114.4
118.6
121.6
124.4
126.7
B
vented
1.5cu.ft
3”
8.25”
<20
[email protected]
[email protected]
13.7
129.2
126.4
126.3
127.4
128.8
C
bandpass with fill-
ing in sealed
chamber
.8cu.ft
.5cu.ft
4”
11.25”
<20
[email protected]
[email protected]
126.6
124.5
128.7
141.7
134.2
127.5
D
bandpass without
filling in sealed
chamber
1.00cu.ft
.5cu.ft
4”
13.75”
<20
[email protected]
[email protected]
126.3
124.9
129.5
140.7
137.2
129.1
E
Optimum Enclosure recommendations:

Sealed enclosure responses
Vented enclosure responses
7
graphs a & b
graph c

Bandpass enclosure responses
8
graphs d & e

9
dimension
drawings

10
warranty
and service
1 - Keep your original sales receipt in a safe place. A copy of the receipt will be required to obtain war-
ranty service.
2 - Be sure your retail dealer has written the date, the model number, and the serial number of the
Product on the receipt.
To give yourself an extra measure of protection, make a separate record of the information about your
purchase and keep it in a safe place. In the event you misplace the sales receipt, your dealer may be
able to give you a copy.
Take a moment now to read the terms of your warranty. Check to be sure your sales receipt is dated
and has the Product model number on it. Then put it away in a safe place.
When shipping a Product in for service:
•Enclose a copy of your original sales receipt that has the date, the Product model number and serial
number (if applicable) written on it.
• Always ship Products in the complete original packing material.
• Avoid shipping Products via the Postal service. If you must use the Postal service, be sure to register
and insure the package.
a/d/s/ Limited Warranty
Analog and Digital Systems, Inc. (a/d/s/) warrants to the original consumer purchaser of the a/d/s/
Products described in this manual, that the Product will be free from defects in materials and workman-
ship for a period of one (1) year after the date of purchase. If the Product is installed by an authorized
a/d/s/ retail dealer, the warranty is extended to (3) three years, a/d/s/’ sole obligation under this warranty
shall be to provide, without charge, parts and labor necessary to remedy the defects, if any, that appear
during the warranty period.
This warranty is the sole and exclusive express warranty given with respect to the Product. All other
express warranties are hereby excluded. Neither a/d/s/ nor the authorized dealer who sells the Product is
responsible for indirect, incidental, or consequential damages. Some states do not allow the exclusion
or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply
to you. This warranty gives you specific legal rights and you may also have other rights which vary from
state to state.
IMPORTANT - Keep your original sales receipt. Be sure the retail dealer has written on it the date, model
number, and serial number (if applicable) of the Product. This information is required for warranty service.
This warranty is limited to:
•Products purchased from authorized a/d/s/ retail dealers in the United States. a/d/s/ will supply a list of
authorized dealers on request. In order to obtain warranty service you must:
•Return the Product, freight prepaid, to the a/d/s/ dealer from which it was purchased, an authorized
a/d/s/ independent service agency, or to a/d/s/. If necessary you may call a/d/s/ Customer Service for
the names and addresses of authorized independent service agencies in your area.
•Provide proof of purchase in the form of a copy of your original sales receipt. The date, model num-
ber, and serial number (if applicable) of the Product must be written on the sales receipt.
This warranty does not cover:
•Damage that is a result of misuse, abuse, accident (including but not limited to damage by water),
faulty hookup, defective or maladjusted associated equipment, or the use of the Product with equip-
ment for which it was not intended.
•Cosmetic defects that appear more than thirty (30) days after the date of purchase. Cosmetic damage
caused by improper handling is also excluded.
• Products that are used for commercial purposes.
• The cost of removing or reinstalling the Product.
•Damage that occurs while the Product is being shipped to whoever will service it. See the information
above regarding shipping procedures.
This warranty is void if:
• The product identification or serial number label is removed or defaced in any way.
•The Product is serviced or repaired by any one other than a/d/s/ or an authorized a/d/s/ dealer or
service agency.
Analog and Digital Systems, Inc.
300 Wildwood Avenue
Woburn, MA 01801 USA
p 781.729.1140
f 781.729.3535

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PN 8900-0415 rev 0