Boston Acoustics Speaker RX47 User Manual

RX47  
RX57  
RX57DIN  
RX67  
RX67DIN  
RX87  
RX97  
®
Boston Rally Series  
Coaxial Speaker Systems  
Installation Instructions  
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Table of Contents  
Tools Required  
2
2
Before You Begin  
Planning the Installation  
Speaker Wiring  
3
4
Installing Speakers in Factory Cutouts  
Installing Speakers in Nonstandard Locations  
RX47/RX57/RX67  
5
8
10  
11  
12  
13  
RX87/RX97  
Professional Tips  
Adding Subwoofers and Electronic Crossovers  
Notice  
Installation of automotive stereo systems requires experience with a  
variety of mechanical and electrical procedures. This manual explains  
the installation flexibility of the Boston Rally Series coaxial speakers,  
not the exact installation methods to be used in any given case.  
If you do not have the experience that these procedures require,  
we strongly suggest you consult your Boston Acoustics dealer about  
professional installation.  
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Tools Required  
Before You Begin  
These are the tools required  
to complete the basic installa-  
tion of the Boston Rally Series  
components. Additional tools  
are necessary for more cus-  
Familiarize yourself with the location of fuel lines, hydraulic brake lines  
and electrical wiring. Use extreme caution when cutting or drilling  
around these parts.  
Shut off all stereo and other electrical devices before you start.  
Protect the speakers by keeping them in their plastic bags until final  
installation. Speakers attract metal chips and filings. Always rest the  
speakers with their cones and tweeters facing up.  
tom work.  
1
8
1. Electric drill with /(3mm)  
1
4
and /(6mm) bits  
Never use force when installing any speaker.  
2. Phillips screwdriver  
3. Saber saw, hole saw  
or nibbler  
Check clearances on both sides of a mounting surface before  
drilling any holes or installing any screws. Some screws require over an  
inch of clearance behind the mounting surface.  
4. Utility knife  
Use a utility knife to cut fabric away from hole locations before you  
drill or cut. Fabric is easily snagged by drill bits and hole saws.  
Always wear protective eyewear when cutting and drilling holes or  
when using power tools.  
5. Silicon sealant or weather  
stripping (optional)  
6. Pliers or 7mm wrench  
(RX87 & RX97 only)  
2
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Planning the Installation  
Read all instructions carefully before you attempt any installation  
procedures. Make sure all operations are clear to you.  
Make sure you have adequate time and shelter to complete the  
installation. Many installations require multiple days to complete.  
Examine the Boston Rally Series speakers and hardware so that you  
are familiar with them before you start the installation.  
1. Decide on speaker placement.  
2. Run the speaker wires.  
3. Install the speakers and complete the wiring.  
3
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Speaker Wiring  
For your convenience, two sets of two-conductor wire are provided to  
use between the speakers and the amplifier or head-unit. Other wire  
may be substituted if desired as long as it is at least 18 gauge.  
Two-conductor speaker wire connects the positive and negative ter-  
minals of each speaker to the corresponding positive and negative ter-  
minals on the amp or head-unit. One side of the wire will be marked in  
some way. Use the marked conductor to connect the positive terminals  
and the plain conductor to connect the negative terminals.  
stripe on one side  
ridge on one side  
different color wires  
thread on one side  
Routing the Wires  
Include a large safety margin when estimating the length of each wire.  
For Doors: Run the wires through factory harnesses or existing  
holes, if possible. If drilling new holes, file the edges and install rubber  
grommets and PVC tubing to protect the wires against abrasion.  
For Rear Deck: Run wires along the door sills just inside the car, lift-  
ing and replacing carpet as required. You may have to remove the rear  
seat to pass wires back to the rear.  
4
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Installing Speakers in Factory Cutouts  
1. Make sure the mounting surface provides a complete air seal between the front and the back of the  
speaker. If the surface is uneven, or if air can leak directly from the back of the speaker to the front, seal the  
air leaks with silicon sealant or weather stripping. Make sure that the sealing material does not touch any  
moving part of the speaker.  
2. Attach the wires to the speaker.  
3. Attach the assembly to the factory cutout using four of the supplied #8 sheet metal screws or other  
hardware. Tighten the screws just enough to seal the woofer against the mounting surface. Do not over-  
tighten the screws.  
5
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RX47 Notice  
The RX47 is supplied with the grille adapter ring attached to the metal basket of the speaker. For many  
factory cutouts, this adapter ring will have to be removed for installation.  
1. Hold the speaker between both of your palms with the speaker cone facing you. Hook your fingers  
behind the magnet assembly.  
2. Push one locking tab out and back with your thumbs to release it from the speaker frame (see  
diagram). Repeat this on all sides of the adapter until the adapter falls free.  
RX67/RX67DIN Mounting Screw Locations  
Factory speaker locations for 6-inch (160mm & 165mm) speakers provide various screw holes for mounting the  
speaker. The RX67 and RX67DIN include several different sets of holes. Rotate the speaker until the correct  
holes line up.  
4-hole pattern  
3-hole pattern  
6
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RX87 and RX97 Installation Option  
The RX87 and RX97 can also be installed from underneath the rear deck  
to reduce the installed height of the tweeter module. A spacer is sup-  
plied with these speakers to protect the rubber surround. The spacer is  
installed between the speaker and the mounting surface as shown in  
the diagram.  
7
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Installing Speakers In Nonstandard Locations  
Check the clearance of both speaker locations. Your vehicle may not be  
symmetrical. (There may be multiple window controls on the drivers  
side, for example.)  
If installing in the doors, remove the interior panel. Avoid possible  
speaker contact with door frames, handles and window tracks. Check  
the window clearance by rolling the window up and down. Also check  
for clearance with the door open and closed.  
The Boston Rally Series speakers are heavy, and must be held in  
place by a strong, rigid structure.  
Check for signs of excessive water leakage inside the door. If the  
door has a plastic moisture barrier, cut a flap to shield the speakers, or  
make a flap from heavy sheet plastic and attach it to the inside of the  
door above the speaker.  
8
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1. Trace the template onto the mounting panel. Mark the pilot hole,  
the edges of the large cutout and the locations of the screws.  
2. Make sure that the mounting surface provides a complete air seal  
between the front and the back of the speaker. If the surface is  
uneven, or if air can leak directly from the back of the speaker to the  
front, seal the air leaks with silicon sealant or weather stripping. Make  
sure that the sealing material does not touch any moving part of the  
speaker.  
9
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RX47/RX57/RX67  
1
8
3. Drill the pilot hole at the center of the cutout, then drill four / holes for the speakers mounting  
screws. Make the large circular cutout with a saber saw, hole saw or nibbler (depending on the material).  
4. Slip U-clips over the screw holes. Position the flat side toward the speaker as shown in the diagram.  
5. Attach the wires to the speaker.  
6. Attach the assembly to the cutout as shown in the diagram. Use four of the supplied #8 x 1sheet metal  
screws or other hardware. Tighten the screws just enough to seal the woofer against the mounting surface.  
Do not overtighten the screws.  
7. Attach the grille. Snap the grille on to the speaker assembly from the front. Be sure to align the logo on  
the bottom of the grille before attaching the grille.  
Optional Spacers  
1
2
To reduce the mounting depth by / , optional spacers are available that can be mounted behind the RX57  
or the RX67.  
10  
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RX87/RX97  
1
4
3. Drill four / holes for the speakers mounting screws. Make the large elliptical cutout with a saber saw or  
nibbler (depending on the material).  
4. Attach the assembly to the cutout as shown in the diagram. Use the supplied machine screws and nuts or  
other hardware. Tighten the nuts just enough to seal the woofer against the mounting surface. Do not over-  
tighten the hardware.  
5. Attach the wires to the speaker.  
6. Attach the grille front. Snap the grille on to the grille frame from the front. Be sure to align the notch on  
the grille with the logo on the grille frame.  
11  
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Professional Tips  
Some installers construct mounting surfaces from MDF. This dense  
material dampens resonances and provides a rigid mounting surface.  
In cases where the speaker is being mounted on the surface of the  
interior door panel and there is a gap between the panel and the  
metal of the door, an appropriate thickness of MDF can be used as  
a spacer.  
When mounting the speakers in nonstandard locations in the front  
of the car, try mounting them as high up and forward in the doors as  
possible to avoid firing into knees, seats and other obstructions.  
12  
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Adding Subwoofers and Electronic Crossovers  
The best way to combine a subwoofer with your Boston Rally Series  
speaker system is with an electronic crossover. Level matching (making  
the subwoofer play at the same level as the coaxial system) and precise  
frequency division are much easier to get right with an electronic  
crossover. Additionally, electronic crossovers have no insertion loss, and  
they isolate the coaxial speakers from the subwoofers back EMF.  
Subwoofer Crossover Frequency Recommendations  
It is hard to predict the ideal crossover frequency to use between sub-  
woofers and the Boston Rally Series RX47, RX57, RX57DIN, RX67,  
RX67DIN, RX87 or RX97 coaxial speakers. Factors such as the interior  
dimensions of the car, the type of subwoofers and the installation  
method all play a role in determining the required crossover frequency.  
We recommend using an electronic crossover flexible enough to easily  
change crossover frequencies. Ideally, the subwoofer crossover fre-  
quency and level should be independent from the high-pass section(s).  
Only through experimentation can the optimum crossover fre-  
quency be determined. However, you can use the following guide as a  
starting point. Start with a crossover frequency of 100Hz for the RX47,  
90Hz for the RX57/RX57DIN, 80Hz for the RX67/RX67DIN or RX87 and  
70Hz for the RX97.  
Experiment with the crossover frequency to achieve a natural,  
balanced sound. Keep in mind that an electrical gap in crossover  
frequencies is often necessary to achieve a flat acoustical response.  
Depending on the installation location, it may become necessary to  
invert the phase of the coaxial speakers relative to the subwoofers.  
Even though they may be electrically correct, they may be acoustically  
incorrect.  
13  
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Limited Warranty  
For one year from the date of purchase, Boston Acoustics will repair for  
the original owner any defect in materials or workmanship that occurs in  
normal use, without charge for parts or labor.  
Your responsibilities are to use the speaker system according to the  
instructions supplied, to provide safe and secure transportation to the  
authorized Boston Acoustics service representative and to present proof  
of purchase in the form of your sales slip when requesting service.  
Excluded from this warranty is damage that results from abuse,  
misuse, accidents, shipping, or repairs or modification by anyone other  
than an authorized service representative. This warranty is void if the  
serial number has been removed or defaced.  
This warranty gives you specific legal rights, and you may also have  
other rights which vary from state to state.  
If Service Seems Necessary  
First, contact the retailer from whom you purchased this product.  
If thats not possible, write to:  
Boston Acoustics, Inc.  
Service Department  
300 Jubilee Drive  
Peabody, MA 01960  
We will promptly advise you of what action to take. If it is necessary to  
return your speaker to the factory, ship it prepaid. After it is repaired,  
we will return it freight prepaid to the U.S. and Canada.  
300 Jubilee Drive  
Peabody, MA 01960  
USA  
508.538.5000  
Boston, Boston Acoustics, and Boston Rally are  
registered trademarks of Boston Acoustics, Inc.  
©2000 All rights reserved.  
Covered by patents issued and/or pending.  
042-000472-4  
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