Soundstream Technologies Speaker SPL 15 User Manual

Subwoofers  
OWNER’S MANUAL AND  
INSTALLATION GUIDE  
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SOUNDSTREAM TECHNOLOGIES  
120 Blue Ravine Road  
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Folsom  
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California 95630 USA  
tel 916.351  
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fax 916. 351. 0414  
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SPL15 and SPL160 SUBWOOFER  
CONGRATULATIONS! You have chosen a superior product for  
reproducing high levels of "Sound Pressure Level" in the car. This precision  
component, when properly installed, is capable of amazing output  
performance. The SPL15 and SPL160 woofers are well-suited for sealed,  
vented, and sealed bandpass enclosures. They also work well in infinite baffle  
installations at one-half the power rating.  
and home theater applications.  
SUGGESTED ENCLOSURES (Continued)  
Should your woofer ever require service or replacement, recording the  
information below for your own records will help protect your investment.  
Sealed Bandpass  
Model Number:___________________________________________________________  
Serial Number: ___________________________________________________________  
Dealer’s Name: __________________________________________________________  
Date of Purchase: ________________________________________________________  
Installation Shop: _________________________________________________________  
Installation Date: _________________________________________________________  
· Enclosure #56  
· Rear = 4.7 ft3 sealed  
Front = 3.5 ft3 @ 50 Hz (Four 4" x 7.5" ports) - Very high  
output for Rock or Rap music.  
· Enclosure #57  
· Rear = 2.8 ft3sealed  
Front = 2.3 ft3 @ 61 Hz (Three 4" x 5.25" ports)- Very high output with good  
low frequency extension. Good for Rock or Rap music.  
· Enclosure #58  
DESIGN FEATURES  
· Rear = 1.5 ft3 sealed  
· Front = 2.3 ft3 @ 75Hz (Four 4" x 3.5" ports) - Super high output. Great for  
· Long Excursion Design -- The SPL woofers use high performance components and the  
New Ultra-Excursion Surround to achieve extra long excursion for high output and deep  
bass.  
Rap music.  
· Heavy Cast Aluminum Basket on the SPL160 and Heavy Gauge Steel Basket on the  
SPL15 provide extra rigidity and damping.  
· Textured Blue Powder Coating ensures durability and lasting superb good looks.  
· Ultra-High power handling Voice Coil with Glass Polymide Former increases power  
handling and performance. Aerospace grade adhesives and materials insure longevity and  
high performance.  
· Dual Voice Coil Inputs for increased flexibility in optimizing installations.  
· Computer Numerically Controlled (CNC) machined magnet plates and pole piece  
precisely focus the magnet energy for optimum performance.  
· High Emissivity Coatings on pole and top plates improve power handling.  
· Double Magnet Structures for powerful, well-controlled output.  
· Vented Pole Piece for greater voice coil cooling.  
· Custom-designed High Strength Spider controls the long travel cone assembly.  
· Gold Plated 8 Gauge Terminals ensure consistently outstanding connectivity for cable  
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Preliminary  
SPECIFICATIONS & THIELE/SMALL PARAMETERS  
SPECIAL DESIGN FEATURES!  
25-500  
95 dB  
2
25-500  
96 dB  
2
Frequency Response (Hz)  
Sensitivity (2.83v/1m)  
Impedance (nominal Z, ohms)  
Rated Program Power, Watts  
Fs (Hz)  
· Custom-designed Cast Frame Basket for deep excursion and precise  
alignment of the voice coil.  
· Custom chrome top and back plates for show-quality installations in any  
vehicle!  
400  
800  
· Nearly 2 1/2" peak-to-peak maximum excursion for producing awesome  
25  
28  
sound levels with just a single woofer!  
.33  
.33  
Qts  
6.80  
.35  
7.82  
.35  
Qms  
Qes  
Vas (ft3)  
7.98  
226  
7.24  
205  
Infinite Baffle  
· Excellent performance for all types of music at moderate levels  
Vas (liters)  
Vas (m3)  
.226  
201  
.205  
183  
Cms (um/N)  
Sealed  
· 1.5 ft3 - Good linear response, excellent small enclosure.  
1.68  
1.02  
12.4  
131.0  
.0845  
845  
2.01  
.67  
DCR (ohms)  
Excellent for high SPL, multiple driver applications.  
Levc (mH) @ 1 KHz  
BL (Tesla m)  
· 2.0 ft3 - Good response, excellent all around enclosure.  
13.3  
131.0  
.0845  
845  
Sd (in2)  
Sd (m2)  
Sd (cm2)  
7.0  
10.0  
22  
X max; one way (linear mm)  
X max; one way (peak mm)  
Vd (linear cm3)  
Vd (peak cm3)  
Vd (linear m3)  
Vented  
22  
· 3.0 ft3 @ 27 Hz (Two 4" x 22" ports) - High output with good  
592  
845  
low frequency extension. Good small enclosure.  
1859  
0.000592  
0.001859  
206  
1859  
0.000845  
0.001859  
173  
· 4.0 ft3 @ 32 Hz (Three 4" x 16" ports) - High output with  
excellent low frequency extension. Great for Rock music  
Vd (peak m3)  
Mms (grams)  
238  
345  
Magnet Assembly (oz)  
Magnet Weight (oz)  
Vf (volume of frame, in3)  
Coil length (mm)  
104  
157  
320  
385  
27.9  
28.6  
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SELECTING AN ENCLOSURE  
There are several different enclosure designs for different applications.  
The SPL subwoofers work very well in all the following enclosure  
designs. It is up to you to select the specific enclosure that will work  
the best for your particular application.  
SUGGESTED ENCLOSURES (Continued)  
Infinite Baffle  
Sealed Bandpass  
Infinite baffle is the simplest type of subwoofer installation. In this type  
of installation, the woofer(s) is mounted to a baffle which is then  
mounted to either the rear deck or back seat of the vehicle. The best  
results are achieved when the trunk area is virtually airtight and  
isolated from the passenger compartment.  
·
·
·
Enclosure #54  
Rear = 2.8 ft3 sealed  
Front = 2.2 ft3 @ 55 Hz (Four 4" x 11.5" ports) - High  
output with good low frequency extension. Good for  
Rock or Rap.  
Sealed Bandpass (SBP)  
Pros  
Cons  
·
·
·
Enclosure #55  
· Excellent low frequency extension  
· Excellent transient response  
· Uses almost no trunk space  
· Lower power handling  
· Low to medium efficiency  
Rear = 1.3 ft3sealed  
Front = 2.2 ft3 @ 77Hz (Four 4" x 3.25" ports) - Very high output. Great  
for Rap music.  
Sealed Enclosure  
Sealed enclosures are relatively simple to build and install, as all that is  
required is an airtight box. The larger the sealed enclosure, the more  
the performance resembles that of an infinite baffle installation.  
Pros  
Cons  
· Very good low frequency  
extension  
· Medium efficiency  
· Very good transient re-  
sponse  
· High power handling  
SEALED  
Vented Enclosure  
Vented enclosures use a sealed enclosure with a vent or port in the box  
Pros Cons  
· Good low frequency exten- · Low power handling  
sion down to the tuning fre-  
quency  
below the tuning fre-  
quency  
· High power handling down · Almost no output  
to the tuning frequency  
· Higher output than sealed  
enclosures  
below the tuning fre-  
quency  
VENTED  
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which is tuned to resonate at a specific frequency.  
Sealed Bandpass Enclosure  
Sealed bandpass enclosures enclose both sides of the  
woofer(s). An airtight enclosure is built around the front and back of  
SUGGESTED ENCLOSURES  
Pros  
Cons  
Infinite Baffle  
Excellent performance for all types of music at moderate levels  
· High power handling  
within the operating  
frequencies  
· Low power handling  
beyond the tuning  
frequency  
·
· Very high output within · Poor to moderate  
the range of the oper-  
ating frequencies  
transient response  
· Poor low frequency  
extension  
Sealed  
SEALED BANDPASS  
the woofer and one  
chamber is ported to  
·
1.5 ft3 - Good linear response, excellent small enclosure.  
Excellent for high SPL, multiple driver applications.  
a specific frequency.  
·
2.0 ft3 - Good linear response, excellent all around  
enclosure.  
Sealed (S)  
CALCULATING (NET) INTERNAL ENCLOSURE VOLUMES  
When constructing any type of enclosure, you must be aware that the  
outside dimensions DO NOT represent the true (Net) volume inside.  
Such things as woofers, ports, thickness of enclosure material, dividing  
walls, and any internal bracing will reduce the total amount of the  
actual air space available. The following worksheet has been designed  
to provide you with the necessary steps to accurately calculate the  
absolute (Net) internal volume of any given enclosure.  
Vented  
·
3.25 ft3 @ 27 Hz (Two 4" x 19.75" ports) - High output with  
good low frequency extension. Good small enclosure.  
·
6.7 ft3 @ 21 Hz (Two 4" x 15" ports) - High output with  
excellent low frequency extension. Great for Rock music  
or home theater applications.  
Vented (V)  
Calculating Cylindrical Port Volume  
1. Measure the outside diameter of the port and divide by 2 for the  
radius.  
2. Square the radius and multiply by 3.14 (p) to arrive at outside port  
area.  
3. Multiply the area by the length of  
the port inside the enclosure for the  
port volume.  
length inside  
enclosure  
outside  
diameter  
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ENCLOSURE VOLUME FLOWCHART  
BUILDING THE ENCLOSURE  
Measure maximum possible dimensions  
· Determine the dimensions of your enclosure.  
· Be certain the box you have designed will fit into the location you have  
chosen. Sometimes making a cardboard box with the same outside  
dimensions is helpful.  
Multiply wall thickness by 2  
· Use 3/4 inch thick Medium Density Fiberboard (MDF) or High Density  
Particleboard. It is preferable to cut the wood with a table saw to ensure  
straight, even joints. If a table saw is not available, a circular saw is  
acceptable.  
Subtract this from each dimension to  
arrive at Gross Internal Dimensions  
· Use a “T” square to verify precise right angle gluing.  
· Use a high quality wood glue and air nails or wood screws to assemble the  
enclosure. Elmer’sâ woodworker’s glue and Weldwoodâ work well. To  
guarantee an airtight box, seal each inside joint with silicone sealant.  
Multiply LxWxD to arrive at  
Gross Internal Volume  
· For Sealed Enclosures, stuff the chamber with 50-75% filling (approximately  
1.5 pounds per cubic foot) of fiberglass insulation or Dacronâ .  
· For Vented Enclosures, staple 1 inch thick fiberglass insulation or Dacron to  
Deduct Vf (volume of the speaker frame)  
from Gross Internal Volume  
all walls of the enclosure except the baffle to which the woofer is mounted.  
· Use the supplied gasket to seal the woofer in the enclosure and eight(8)  
wood screws or T-nuts and bolts. Progressively tighten each of the bolts or  
screws to prevent warping the woofer frame.  
Braces?  
· Use slide-on connectors to attach speaker wires. Do not solder wires to the  
No  
Yes  
SUGGESTED ENCLOSURES  
Calculate brace volume and deduct  
from Gross Internal Volume  
The following designs include a variety of enclosure sizes and types.  
Each design has two frequency response curves; one showing predicted  
“In-Car” response, and the other showing “Half-Space Anechoic” (out-of-car)  
frequency response. The performance difference between the two curves is a  
result of the natural acoustics of an “average” automotive environment. This  
“average” transfer function is only an approximation of what you may expect to  
see in your car. Every car is different. Each curve was generated using 2.0  
Volts across both voice coils in parallel and measured at 1 meter. Also, each  
frequency response curve includes a 12 dB/octave low pass at 100 Hz. The  
response curves can help you visualize relative performance differences  
between designs. Read through the descriptions given for each enclosure and  
select the one that suits your needs.  
To convert to LITERS:  
Divide in3 by 61.03  
You are at Net Internal Volume  
in cubic inches (in3 )  
To convert to CUBIC FEET:  
Divide in3 by 1728  
Remember: all suggested enclosure volumes are Net, and DO NOT include  
woofer, port, and bracing displacement!  
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