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Bose 301 Replaced Tweeter Doesn't Work

I'm bringing a pair of Bose 301 Series 1 (the ones with the tweeter vane) back to life. I've already redone the foam surrounds on the woofs. Next I've replaced a bad tweeter, but the new tweeter doesn't work also. I'm a diy'er with no knowledge of internal speaker wiring... anyone out there have an idea what I should do next. I'd like to finish this project without having to go to a shop. Thank you for your time. Scooter

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BOSE 2 AND VCSX OVER DISTORTION


have a tech look at your set you have some bad caps in the audio circuit along with your audio out put transistor or ic.have it replace along with the bad caps.good luck my friend.

Jun 10, 2007 | Bose VCS-10 Center Speaker

2 Answers

Both tweeters on one of my Bose 301V speakers have stopped working. Is it possible that they failed together or is it likely to be a crossover problem?


Since there is no single crossover for two speakers it is likely both speakers experienced the same audio trauma and blew together. Something like microphone feedback will take thenm out in a literal heartbeat.

The 301's sometimes have an element in series with the tweeters that looks like a little light bulb (or it could be a fuse, too) and it is designed to blow before the tweeters die. They're easy to find if you remove the woofer to get some maneuvering space inside. If they'rethere and blown (visible) you can either wire aroundthem and be careful in the future or get some more.

Do a web search for "tweeter protection fuse".

If the tweeters did take the hit get on eBay and find some more, plus think about installing protectors if you can't avoid excessive distortion or power going to them.

Regarding pwoer vs distortion, the latter will kill tweeters in a blink so don't think a modest amp is safer than a powerful one. The modest amp will distort sooner.

Aug 09, 2011 | Bose 301 V Main / Stereo Speaker

1 Answer

To Mr. Hyde: you appear experienced with Bose 501 Series III speakers. I need to replace a burned out glass bulb fuse inside the right speaker, the fuse for the woofer I believe. I think that you said that...


Hello whit_hughes,

Just received your request for some information regarding Bose 501's......... Series III. Your looking for te manufacturers part # for the fuse which is in line with the woofer? The fuses used ON the Series III Crossovers (hard wired/soldered directly to crossover board/componants) have been Identified as BUSS #2494, 2amp, Quick-Blow Glass Tube Type Fuses. The fuse which is in-series with the woofer & the fuse which is in-series with the pair of tweeters are the same! In theory this means that the woofer is capable of twice the wattage of the tweeters due to the tweeters being wired in series with each other..... which in turn divides the power beween the two equaly. On the woofer circuit there is only the one speaker or voice coil obsorbing the power. The woofer circuit being wired in parallel with the tweeter circuit again splits the power between the two cuircuits..... so in an ideal situation the woofer sees 50% total input power while the tweeters each see 25% total input power;;;; totaling 100% total. The way Bose has fused them in the Series III's is such that each branch can obsorb a total of 2 amps before shutting down each indivigual branch. This can be adventageous..... should peak power be exceeded causing loss of full load abruptly, Amplifier Power Output Transistors usually blow..... however when only half of the full cuircuit shuts down due to peak power exeeding limits causing one fuse to open (blow) ... the actual impedance (resistance) of the speaker increases protecting the Amplifiers Output Transistors! Thats the reason for the 2 fuses. Each of them are identical. They are soldered into place.... via the wire which is attached to each end of the fuse. (Note; the fuse "kit" Bose is trying to sell you is an external in line fuse holder for each speaker {costing 1.29 each} & 2 fuses for each holder, One for now & One for Later aftr it blows {costing 1.00 each}..... costing Bose 6.58, neting Bose $13.42 Profit!!!! Keep in mind that this fuse WILL NOT FIX YOUR PROBLEM EITHER! DUE TO THE FUSE WHICH IS PRESENTLY BLOWN HAS NOT BEEN REPLACED!!!!! ) The one that has to be replaced is on the crossover... not between the Amplifier & the Speaker Enclosure. Tools required = 1 Long Big Straight Blade Screwdriver to pry off speaker grill, 1 Phyllips Screwdriver to remove screws seccuring woofer to encloser... be carefull not to damage/tear gasket, 1 pair side cutters to cut blown fuse out of crossover curcuit, 1 pair needle nose pliers to attach NEW fuse to crossover curcuit, 1 soldering Iron & a small piece of solder to re-solder fuses leads securly to crossover curcuit. ( replace gasket, woofer, screws, & speaker grill. ENJOY! Should additionaL informaton be required please let me know.... you'll have to leave me your e-mail address for pictures or drawings.... as I don't think they can be sent through this site. Hope this helps ya..... Its an EASY JOB...... you CAN DO IT! & will be glad you did when your done, they'll sound GREAT! ) GOOD LUCK!

Jun 22, 2011 | Audio Players & Recorders

2 Answers

Hello........ looking for a schematic for Bose 501 series 3 speakers. I need to replace the fuse in line with the tweeters.... its blown & does not have a value on it (unmarked, quick blow, twin lead,...


Did you find a solution? Dunno if it's much help, but I just today picked up some 501s - Series I I think - ugly heavy brown material grilles - but with a manual! No fuses in these, but booklet recommends installing your own in-line fuse holders (!?). Specifies a BUSS AGC-3 fuse for amps under 50wpc; or a MDL-2 fuse for amps over 50 wpc. Can be placed is series with either or the two signal wires. Very strange.... Robin

May 14, 2011 | Bose 501V Speaker

1 Answer

Is there anyway to fix a blown Bose Speaker (201)?


The only 2 solutions are: 1. Just find an equivalent driver to replace. Re-wire new driver speakers into the enclosures. The old 201s may have had decent drivers (although probably paper cone) for back then, but now just about anything will sound as good in those particular cabinets.
2. Call Bose and exchange them for current 201 speakers (higher clarity more powerful). Bose will give you about 30-40% off I believe on a series 5 model. They now pay for inbound and outbound shipping as well.

Aug 12, 2009 | Bose Wave Radio II

1 Answer

Bose 301 speaker fell off bookshelf. Still works,


http://cgi.ebay.com/Bose-301-Series-II-Speaker-Woofer-Pair-Excellent-Cond_W0QQitemZ250402833131QQcmdZViewItemQQptZVintage_Electronics_R2?hash=item250402833131&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50


Determine the series from the label on the back and get yourself one or a pair (preferred, so they match sonically) of new woofers and replace the broken one. Carefully observe the + and - leads and replicate them on the replacements.

Sometimes you can snag a pair of whole speakers cheaply, too. Then you might end up with one spare 301 and one for parts. I use a single 301 IV as my Rear Surround, suspended on the wall behind my seating position. They also do well as Center speakers. The Series IV is also made of some kind of plastic composite which is bullet-prrof compared to the previous particle board models. I had one hit the floor from 5 feet up and it doesn't have a scratch. Get familiar with the models as they are all different in their tweeter arrangements. For example, the IV's are designed for corner placement with one tweeter facing inward at 45 degrees and one on the opposite diagonal corner of the box facing 180 degrees opposite the front tweeter, into the corner for a bank shot.

http://cgi.ebay.com/Bose-301-Series-IV-Speakers-NR_W0QQitemZ310134927077QQcmdZViewItemQQptZSpeakers_Subwoofers?hash=item310134927077&_trksid=p3286.c0.m14&_trkparms=72%3A1234%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50
.

Mar 15, 2009 | Bose 901 EQ1915 Home Equalizer

1 Answer

2002 Grand am gt monsoon, hook up rear aftermarket speakers


You have to test them, either should work fine (as in use either pair) if that doesn't work connect one pair at a time and listen for the difference, one pair might be for factory midrange and other for tweeter.. there are two different wiring configurations...

Jan 28, 2009 | 2002 Pontiac Grand Am

1 Answer

KLH tweeters stopped working


hi, have u first disconnected the tweeters and then checked, as if its on a cross over, the tweeter is in series with a capacitor,if u have a ohms meter or a continuety tester check the tweeter coil if its open,secondly you can have the coil replaced, check if u can get one before buying a new,let me know

Jan 11, 2008 | KLH HT-9930 System

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