Recoil RW8D2 User manual

RW8D2/RW8D4
RW10D2/RW10D4
RW12D2/RW12D4
Woofer speaker system 8/10/12-inch
User Manual
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
DUAL 4 OHM/2 OHM
VOICE COIL WOOFERS

RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
BEFORE YOU START - CONGRATULATIONS!
PRECAUTIONS
Congratulations on your purchase of our product! We hope that RECOIL sub- -
woofers will delight you with impressive performance. In the production of RW
subwoofers, high-quality components and ultramodern materials are used. This
manual contains the basic instructions required for the correct installation and
use of the system. Before installing the components, please read all instructions
in this manual carefully. Failure to follow instructions can result in unintentional
damage or product damage.
To install RW series subwoofers, it is recommended to contact a professional car
audio installation service. Correct acoustics setting allows you to achieve
excellent sound and extend the service life.
ATTENTION!
Prolonged exposure to sound pressure 100 dB and higher can cause hearing
loss. Use common sense and practice safe sound. Remember that prolonged
exposure to excessively high sound levels can damage your hearing. Driving
safety comes first.
The manufacturer is not responsible for hearing loss, body damage or property
damage due to misuse of this product.
ATTENTION!
Proceed with the installation only if you are a qualified car audio installer,
otherwise contact a professional installation service.
• Always wear safety glasses when using tools.
• Before proceeding with the installation, turn off the car head unit and other
electronic devices.
• Disconnect the negative (-) terminal from the car battery before starting the
installation.
• Store the loudspeaker in its packaging if you have not proceeded to install it,
and always place the
loudspeaker with the cone facing up. Never use force when installing speakers.
• Determine the location of the fuel lines, brake pipes, oil lines, and vehicle
electrical wiring beforeproceeding with the installation.
1

RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
BILL OF MATERIAL
• Check that the installation site has sufficient air exchange on both sides of
the speakers before drilling holes.
• Check that nothing interferes with the normal operation of the cone, other
wise the cone will be damaged.
• Use a utility knife to cut off excess pieces of fabric near the hole where the
speaker will be installed before starting drilling.
• Use a grommet for the speaker wires (not included) when pulling through
sheet metal, otherwise the wire may be damaged by the metal edges of the
hole.
Subwoofer - 1 pc
Instruction - 1 pc
Mounting screw pack - 8 Pair
EXAMPLES OF CONNECTING SPEAKERS
Your subwoofer speakers have a dual voice coil and 2Ω/4Ω impedance.You need
to know the maximum power of your amplifier to optimize your sound,
You can vary the impedance parameter by connecting the woofer acoustics: in series,
in parallel or mixed. Please select a suitable woofer speaker connection scheme
depending on the number of speakers to be connected through the speaker system
and the stability of the amplifier impedance. The most important thing when
connecting speakers is to make the connection so that none of the speakers are
overloaded. Overload threatens to damage the speaker. It is important to understand
that the speaker can be powered either less or equal to the rated power for which it is
designed. Otherwise, any speaker will be damaged due to overload. Before
connecting the speakers, you need to determine their nominal power (W), the active
resistance of the voice coil (Ohm), which are indicated on the magnet or in the
technical specifications in the attached instructions.
2

RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
RW series subwoofer size table
Code
A
B
C
D
E
F
RW8
RW10
RW12
113.5
101.5
137.5
182
215
202
136
121
146
233
263
246.5
148
130
146
278
320.5
300
Unit mm
:
3

RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
PARALLEL
CONNECTION
SERIES
CONNECTION
Speaker DCR
Speaker
(1 PC)
Parallel Connection
2 PCS
series connection
2 PCS
Connection
RW8D2 RW8D4 RW10D2 RW10D4 RW12D2 RW12D4
2+2 2+2 2+2
4+4 4+4 4+4
0.5/2 1/4 0.5/2 1/4 0.5/2 1/4
2/84/16 2/84/16 2/84/16
Measurements in Ohm (Ω)
（ ）
（ ）
4

ABS Terminal Insulating Sheath
Thickened Frame
Large Stroke T YOKE
Pure Copper
Terminal
Suture High Strength Cone
High Temperature Resistant
Black Paint Voice Coil
NBR Magnet Cover
Cooling Vent
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
RW8D2
RW8D4
RW10D2
RW10D4
RW12D2
RW12D4
UNIT
Nominal lmpedance
RMS Power Handling
MAX Power Handling Se
Frequency Response
Voice Coil Diameter
Winding Material
Diaphragm Material
Frame Material
Magnet Material
Magnet Weight
Small signal parameters
Dimensions
Overall Depth
Mounting Depth
Overall Width
Cutout Diameter
2+2
4+4
2+2
4+4
2+2
4+4
200
200
250
250
400
400
500
500
50-500
50-500
40-400
40-400
2/50.8
2/50.8
2/50.8
2/50.8
2/50.8
2/50.8
ASV
ASV
ASV
ASV
ASV
ASV
Fiber paper
Fiber paper
Fiber paper
Fiber paper
Fiber paper
Fiber paper
Steel
Steel
Steel
Steel
Steel
Steel
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
Ferrite
966/34
966/34
1027/36
1027/36
1129/40
1129/40
36
37
34
34
0.42
0.52
0.62
0.48
0.58
0.71
0.74
0.68
0.78
3.87
4.78
4.85
5.01
4.69
4.43
14.2/0.50
16.6/0.59
35.7/1.26
35.7/1.26
83
83
85
85
8.5
8.5
8.5
8.5
113.5/4.47
113.5/4.47
101.5/4.0
101.5/4.0
215/8.47
215/8.47
182/7.17 182/7.17
ohms
300
300
Watts
600
600
Watts
35-300
35-300
Hz
in/mm
N/A
N/A
N/A
N/A
g/Ounce
34
33
Hz
0.64
0.6
0.66
N/A
N/A
N/A
57.6/2.03
60.6/21.4
L/FT3
87
87
dB
7.5
7.5
in/mm
136/5.35
136/5.35
148/5.83
148/5.83
in/mm
121/4.76
121/4.76
130/5.12
130/5.12
in/mm
263/10.35
263/10.35
320.5/12.62
320.5/12.62
in/mm
233/9017
233/9017
278/10.94
278/10.94
in/mm
FS
Qts
Qes
Qms
Equivalent Volume Vas
Sensitivity 1W 1M
Xmax
（ ）
（ ／ ）
5

Subwoofer enclosures? Why?
This is a very complicated and overly discussed topic. For over 80 years manufacturers
and hobbyists have discussed, debated the virtues of having enclosures, vented (ported)
versus sealed versus bandpass versus transmission lines.
It is beyond the scope of this tech tip to discuss all the virtues (pros and cons) of each.
We will keep the discussion to sealed versus vented as these are the 2 most commonly
used enclosures for car audio applications.
Remember there are 2 types of energy in car audio. Electrical, which ISNT free, and acoustical – which is
FREE. Typically no one complains to their retailer/installer that they got TOO MUCH BASS! Everyone
complains about not getting enough!!! So lets FIX that! Design and build better subwoofer enclosures.
SEALED: Advantages
1. Simple to build, no real thinking involved.
Hard to screw up
2. Best phase and time response.
SEALED: Disadvantages
1. Loose typically 3 - 6dB of output versus
vented
2. You’ll need 6dB more power to get to the
same point in output as a vented enclosure.
Or like going from a 500 watt amplifier to
a 2,000 watt amplifier. And the subsequent
additional current draw. 500 watts is about
58 amperes, versus 2,000 watts which is 233
amperes (full power current draw)
SEALED
TYPES OF ENCLOSURES
SEALED VENTED BANDPASS TRANMISSION LINE
PROS & CONS?
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
6

VENTED: Advantages
1. Gain 3-6dB of output over sealed. Or roughly
the equivalent of having a 500 watt amp “act” like its
2,000 watts. Enclosure is giving you FREE energy
2. Better transient response.
3. Less current draw becasue you can utilize a smaller
amplifier.
VENTED: Disadvantages
1. Much harder to design and build. Really need a
modeling program to do that. We recommend
WinISDPro. Which is FREE go to this URL:
http://www.linearteam.dk/?pageid=winisdpro
2. Typically about double the size of a
sealed enclosure. But still relatively small
in the scheme of things.
3. If you design the box incorrectly (in other words
mistune it) for example tune below Fs of driver
{highly discourged}) it can damage the woofer
VENTED
TYPICAL RECOMMENDED TUNING FREQUENCIES
For 4 door sedans 34-38 Hz
For longer vehicles (SUV’s ,Vans, etc) typically 30-36Hz
PRE-FAB? OR ..NOT TO PRE-FAB???
These can be “OK”. BUT...the secret is dont get one that is tuned TOO high.
Many of these prefab enclosures are tuned to 40 Hz. For most “mature adults
this tends to be too high and give you what is called ”1 note Bass” . Be careful!!
Typically no one complains to their retailer/installer that they got TOO MUCH BASS! Everyone
complains about not getting enough!!! So lets FIX that!
- Design and build better subwoofer enclosures-
PROS & CONS?
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
7

Tech Tips/Secret Stuff
There are all kinds of ways to design subwoofer enclosures. Nomograms, charts, on-line design
software, etc. But the BEST most consistent PC software is available...and better yet....its FREE!
And it has been available for over 10 years.
WINISD Pro
website: http://www.linearteam.dk/?pageid=winisdpro
1. Use 3/4 in or thicker MDF, or Baltic Ply (perfered)
2. When in doubt BRACE! Woofers can produce MORE than 10 pounds per square inch of pressure!
3. Always deaden the interior (if possible) with deadliner, DynaMat, HushMat, etc. Make the
enclosure as dead as possible.
4. Stuff enclosures about 1/2 to 2/3rds full of polyfill. BOTH for vented and sealed!
5. IF there is a choice between vented OR sealed. For a normal human being...go VENTED!!!!
Sealed? You need 4 times the energy (power) to get to the same place a vented can get you.
And some of the most expensive home speaker systems in the world...use vented enclosures!!
(HINT: only put in 4 of the Theile/Small Parameters - Fs/Vas/Qes/Qms)
IN THIS "SCENARIO" A 0.4 SEALED VS 1.0 CUBIC FT VENTED ENCLOSURE
VENTED IS +9 dB more output for every watt put into it!!
WINISDPRO SCREEN SHOT
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
8

RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
RW8D2/4,RW10D2/4,RW12D2/4
SUBWOOFER SPEAKER SYSTEM 8/10/12-INCH
Sealed Optimum Large Vented All Around
Vb (ft tf(bVN/A0.12 )
) 0.6
60/ 43)zH(3F/bFN/A40)zH(3F
).ni(s/troPN/A0.70ctQ (dia. x length) 2 x 5.5
400)W(ePN/A300
)
W
(
eP
Vb (ft tf(bV1.251.0 )
) 1.5
38 / 32)zH(3F/bF4039)zH(3F
).ni(s/troP0.85
0.91 ctQ (dia. x length) 3 x 6.5
500)W(eP400500
)
W
(
eP
36 / 31)zH(3F/bF3335
).ni(s/troP0.850.98 (dia. x length) 4.0 x 12
600)W(eP500600
Sealed Optimum Large Vented All Around
Sealed Optimum Large Vented All Around
)zH(3F
ctQ
)
W
(
eP
Vb (ft ) 1.5
3.0
tf(bV ) 1.75
RW8D2/RW8D4
RW10D2/RW10D4
RW12D2/RW12D4
The enclosures specified below are offereed as suggestions only. Assistance from
an authorized Recoils Audio retialer is recommended for designing the corrent
enclosure for YOUR system. All volumes are shown as gross internal volumes ,
driver and vent displacement have been accounted for.
NOTE:
The use of a 30Hz sub-sonic filter is recommended on most vented enclsoures
9