TBI TWEP51 User manual

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Congratulations on your purchase of the revolutionary TBI TWEP51 car tweeter.
Your new tweeters are HDSS® certified and therefore guaranteed to improve the
sound in a way you never thought possible. Please read these instructions
carefully before attempting installation of your new tweeters. When properly
installed your TBI deluxe tweeters will give you years of enjoyment. Your
TWEP51 Tweeters come with 1 year limited warranty against manufacturers
defects. Retain your invoice for proof of purchase.
Your box should include the following items:
2-TWEP51 tweeters for flush or surface mounting
2-surface mount enclosures with angle adjustment
2-surface mount enclosures with fixed angle
2-flush mount enclosures for use with retaining rings
2-flush mount enclosure retainer rings
1-hardware bag - flush mount hardware 4 screws -4 capture nuts- 2 foam pads
2-wiring harnesses with 6db crossover network included (6.6uf film 100 v)
INSTALLATION
First you must chose where you will mount the tweeters. Ideally it is best to
locate the tweeters near the speakers in which they will provide support. We
recommend that you decide on using the speakers which will provide your main
front sound stage or point of presentation. This is the most realistic position to
enhance if only two tweeters are to be used. Locate them as close as you can to
your front speakers using the angle mounting hardware to focus the main high
frequency energy high and to opposite sides of the car.
In order to connect your new tweeters you will need to gain access to the left
front and right front wires which are connected to their respective speakers. In
some cases when your vehicle is already equipped with conventional tweeters
you will have to disconnect them. In most cases these tweeters are located at
heights which represent a great distance from the speakers that are associated
with them. This is because of the limitation of conventional tweeters in their
directivity and the breakup that is associated with these products. This is not the
optimum position although your new tweeters can operate in those positions
successfully. Remember, just as with high quality home speakers, the tweeters
work best when located close to the midrange source.
Figure 1 illustrates the basic position of the front speakers and their associated
wiring. If you are going to put your new tweeters in the same position you will
have to make sure that they will fit. The crossover associated with your factory
speakers may not be optimal when replacing the tweeter but in this case you
cannot use the included crossover in series with the original. It is best to use the
supplied crossover connected direct to the proper channel for best performance if
the original or existing crossover capacitor has a value which is much different

than the high quality 6.8 uf film capacitor supplied. Be sure to connect the wiring
in the proper phase for best performance and imaging.
If your front speakers are coaxial then it is best to disconnect the tweeter or cut
one wire going to the tweeter for best performance. In using the TWEP51 it is
important that they are the only source for the high frequencies. It is okay to use
multiple TWEP51 tweeters when using additional full range sources such as the
rear deck speakers. This will provide a central image for most stereo sources
when the front and rear fader is balanced. The rear speakers are best setup to
function for lower frequencies so as to provide a vivid front stage for your sound
presentation.
When flush mounting your tweeters you will need to cut a 1 15/16 (45mm) with
9/16 (14mm) depth requirement for the flush mounting retainer cup. Use the
flush mount retaining rings to secure the enclosure from the back side of the
hole. For all other flush mounting enclosures please use the holes at the base of
the enclosure for marking your mounting holes.
FIG 1
The above drawing represents typical situations and the installations can vary
depending on the vehicle. It is important to follow the above instructions as
accurately as possible but excellent performance can be attained if you must
position your tweeters differently. It always best to angle the tweeter opposite
your seat toward your head when the tweeters are located close to the floor.
Flush mounted dash mounted tweeters can use the front windshield to reflect all
of the high frequency energy into the cabin and is an excellent location for dash
mounted systems. Flush mounted tweeters mounted in the rear shelf of sedans
can also use the rear window to reflect their high frequencies into the cabin.
Keep tweeters and midrange as close as you can regardless of the final
positions.