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11

Troubleshooting

Problem:

 No output from woofer in individual speaker

Cause:

 Bad connection or defective woofer

Solution:

 Check connections from crossover board to woofer. If this is OK, check solder connections in the

crossover, particularly on inductors. If this is OK, directly test woofer by hooking it up to stereo system at low
volume setting. If sound comes out of the woofer, then go back and check connections. If there is no sound at
all, then woofer is likely defective. Call 1-800-338-0531 for service.

Problem:

 No output from tweeter in individual speaker

Cause:

 Bad connection or defective tweeter

Solution:

 Check connections from crossover board to tweeter. If this is OK, check solder connections in the

crossover. If OK, it is possible to carefully test the tweeter by directly connecting it to your stereo. Test at a very
low volume for a brief period of time, at the level of a loud whisper. If there is high-frequency sound, then go back
and check connections. If no sound at all, then tweeter is likely defective. Call 1-800-338-0531 for service.

Problem:

 There is sound from the speaker, but it is very quiet and seems to be mostly treble or midrange.

Cause:

 Woofer and tweeter are wired backwards

Solution:

 Immediately cease testing to prevent damage to the tweeter. Check connections from crossover board

to woofer and tweeter, making sure the T terminal goes to the tweeter and the W goes to the woofer.

Problem:

 There is sound from the speaker, but it doesn’t sound normal.

Cause:

 Crossover board is wired incorrectly

Solution:

 Double check that the input from the speaker terminals is connecting to the inputs on the crossover

board. If this is correct, check that all components are of the correct value and in the right location.

Problem:

 Intermittent output of entire speaker, woofer, or tweeter.

Cause:

 Bad connection in wires or crossover board.

Solution:

 If entire speaker is intermittent, then check connections between the input terminals and the crossover

board. If just woofer or tweeter is intermittent, check the wires going to the drivers. If these are OK, check the
connections of the components within the appropriate section of the crossover.

Problem:

 In stereo, speakers lack bass or image is unfocused.

Cause:

 Speakers are out of phase

Solution:

 Check connections from amplifier to the speakers. Make sure polarity is the same on both speakers. If

correct, check the polarity of connections going from binding posts to input on crossovers. If this does not
correct the problem, check polarity throughout the rest of the system, looking for one driver that is wired incor-
rectly.

Problem:

 One speaker appears louder than the other

Cause:

 Amplifier settings, environmental factors, psychoacoustics, poor connection in crossover

Solution:

 Check amplifier that balance is set even. Next, check that one speaker isn’t closer to a wall, window,

couch, or other acoustically important object. This may affect perceived loudness due to the addition or reduction
of extra sound reflections. If this is the case, physically switch the left and right speakers, and re-observe. If the
same location still sounds quieter, then it is the environment. If the quiet speaker moves, then you may have a
problem within the speaker. Often, if you think one speaker is louder than the other, it will appear so. Have
someone help you do a blind test or take a break and allow time for your brain to relax. The next day, if one still
seems louder, investigate all connections within the crossover.

Problem:

 Speakers play well, but amplifier shuts down.

Cause:

 Amplifier does not have enough power or cannot handle speaker impedance

Solution:

 If using 4 ohm speakers, check receiver/amplifier manual to see if it can handle 4 ohm speakers or if

it has a low impedance setting. If not, upgrade amplifier. If receiver/amplifier can safely handle the speaker load,
then it may simply not have enough power.

Parts Express 725 Pleasant Valley Dr  Springboro,  Ohio 45066-1158

Summary of Contents for 302-910

Page 1: ...Loudspeaker Kit Assembly Instructions Vifa PL Bookself Speaker Kit 302 910 302 912 302 914 Manual 999 241 January 2004 Parts Express ...

Page 2: ...2 x 24 x 18 Acoustic foam 081 435 20 6 x 3 4 Phillips pan head screws 264 527 2 Vifa PL27TG35 06 Tweeter 297 322 2 Vifa PL14WJ09 08 Midbass 255 242 2 Jantzen 80 mH 18 ga inductor L1 255 266 2 Jantzen 2 00 mH 18 ga inductor L2 027 420 2 Dayton 3 3 uF capacitor C1 027 423 2 Dayton 5 1 uF capacitor C2 027 427 2 Dayton 6 2 uF capacitor C3 004 6 2 Dayton 6 ohm Non Inductive resistor R1 004 16 2 Dayton ...

Page 3: ...n be mounted into the cabinet per the instructions below Screw mount port tubes The port can simply be set into place and carefully secured with the included 6 3 4 screws Be careful not to over torque the screws which may result in cracking of the plastic 2 Install Binding Posts The posts will need to be knocked into place with a hammer and secured from the inside of the cabinet Start by placing t...

Page 4: ...ed For example use one piece of foam on the right side wall on the front half of the cabinet Use a second piece on the left wall behind the brace For the top and bottom use one piece of foam on the bottom front half and one piece on the top rear half above the port This will reduce direct reflections between parallel walls on all surfaces without overdamping the system This configu ration also wor...

Page 5: ...round the hole in the baffle Either method can be used it is a matter of personal preference Thinning the bead is important to allow the drivers to sit flush in their recesses Placing a small bead of speaker sealing caulk around the driver frame Once all drivers have their gaskets they can be carefully lowered into place on the baffle Having the terminals facing towards the bottom of the cabinet i...

Page 6: ...e The following photographs are of a generic crossover assembly and will not exactly match the look of your particular system Component locations on PC board with labels Insert components into PC board securing with silicone or hot melt glue Each component will have two leads that correspond to holes on the PC boards Put the components into place with the leads going through their appropriate hole...

Page 7: ...will ensure a good flow of solder between the two After heating the board and leads for several seconds add solder to the joint to form an effective connection A good solder joint will have a conical shape and will not look blobby or spherical After all connections are made the remaining component leads on the rear of the board can be trimmed down with a pair of side cutters or other electrical cu...

Page 8: ...8 Final assembled 302 910 302 912 302 914 crossover ...

Page 9: ...re working and that the overall sound is full and smooth Even though everything is not completely secured we should still be able to get a good idea of what the overall sound will be like If a driver is not working or the sound is intermittent or distorted please see the troubleshooting section for possible remedies Be sure that you are satisfied that everything is working correctly before moving ...

Page 10: ... socket will protect the male pin while applying uniform pressure around the mounting flange It is best to install the guides with the grills laying flat on a solid surface to minimize the chance of installing the guide askew The female guides are designed to fit into the recesses where the screws attach the baffle to the cabinet They can be tapped into place with a hammer being careful not to dam...

Page 11: ... entire speaker is intermittent then check connections between the input terminals and the crossover board If just woofer or tweeter is intermittent check the wires going to the drivers If these are OK check the connections of the components within the appropriate section of the crossover Problem In stereo speakers lack bass or image is unfocused Cause Speakers are out of phase Solution Check conn...

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