Question about Quad 11L Main / Stereo Speaker

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Re: Quad 11L tweeter replacement

Thanks for your help!

So what tool would you use to wedge out the woofer without damaging the lacquer coating and the rubber around the drivers?

Is a knife too tough?

Should I deliver it to a service centre? Only unauthorized ones are available where I am (in Dubai). The cost of labour is approx $80.

Akil

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Given the relatively small cost of the repair, I'd have the servicer do it. That way if anything happens, he/she is respionsible for it. When I repair this type of speaker, I usually use an old chisel. It is sharp enough to get under the edge and strong enough to pry up the speaker. Just be careful not to nick the cabinet.

Dan

Posted on Jun 25, 2008

  • Paul Torego Jan 17, 2011

    I found a more low-tech solution, removing the allen screws first from the woofer, placing the speaker on its side and using my fingernails to gently prise out the woofer. Once the woofer is out, I removed the tweeter screws and put my fingers into the hole and genty pressed the back of the tweeter. If your fingernails are too short, you could grow them, or perhaps you know someone with longer nails.

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Sirius paint protection problem with bonnet leaving water marks on a car that is only six months old?


It sounds like the paintwork needs inspecting by an experienced paint professional.

Could be something has penetrated the lacquer coating and is now trapped behind it.
Paint protection systems have been responsible for many such instances after attacks by tree sap or bird lime or something more mechanical in nature has damaged the surface. Often such problem-causing damage is virtually microscopic and I have a pocket microscope which has been invaluable in the search for reasons why.

If something is trapped underneath the lacquer the cure will be a bare-metal respray.

In my opinion the best paint protection system is an old-fashioned hard wax polish and lots of time and energy. It is only by applying a regular hard wax coating that the thousands of the inevitable tiny and microscopic road-damage chips in the lacquer can be kept waterproof and prevent water ingress under the lacquer and paint which causes so much damage, especially in frosty weather. It is already too late when the results of such damage become visible.

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I open my b212a and disconnected the speaker and horn wires and know i have completed my repair i am read to reconnect and i don't remember which set of wires are the positive side


Because the system is bi-amplified, it is important to replace the wires correctly to avoid phase problems. I don't know how the wires are colour coded, but if it is any help I downloaded the schematic and the wires are numbered 1: Woofer Active 2: Woofer Earth
3: Tweeter Earth and 4: Tweeter Active. Sorry if that's no help. Otherwise it should be easy to trace the wires to see which connect to earth.

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1 Answer

Remote reset


Yes the woofer and tweeter can be replaced but the woofer needs a recone kit to repair as the whole speaker cannot be replaced without replacing half of the speaker enclosure.... call JBL pro or a service center for help.

Oct 08, 2013 | JBL EON15 G2 Main / Stereo Speaker

1 Answer

My Bose l1 tweeter cuts out. any suggestions?


you are most likely turning it up too high so it cuts out to protect the speaker. Get bigger speakers.

Sep 04, 2013 | Quad 11L 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

Diamond 8.4 serie are there 2 way or 3 way


Hi,

These speakers are 3-way there are 2 woofers and 1 tweeter per speaker. Here are the technical specifications of each speaker:

Two 6.5-inch Kevlar woofers and 1-inch silk-dome tweeter per speaker
86 dB sensitivity
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6 ohms impedance
30 to 20,000 Hz frequency response

Please rate my answer if this helps.

Many thanks,

Chris

Mar 02, 2011 | Wharfedale Diamond 8.4 Main / Stereo...

1 Answer

Quad 11L distorts sound temporarily at the beginning of a session


Swap the speaker that makes the noise with one of the others. If it acts up on the new channel you know that it's got a fault on it. However if the noise appears on the new speaker the fault is in the amp (perhaps an overheating transitor).
Looking at the picture on fixya of the speakers, it seems unlikely that the speaker units would cause that fault, but the crossover could in it.

Feb 09, 2010 | Quad 11L Main / Stereo Speaker

1 Answer

Stainless steel cleaner damage to lacquered finish?


Most stainless products don't have a lacquer coating. That's why stainless is so nice. Go over it lightly with a soft scouring pad like scotch brite to remove the marks. Just follow the grain.

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1 Answer

Re: Quad 11L tweeter doesn't work


If you sure it is working and new then ,maybe connection error,try to review the hooked up connection maybe there might be interchange;

Just click and choose whatever connection you want;


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Hope this may help;

Regards,
VOTIT

DON'T FORGET TO RATE

Aug 25, 2008 | Quad 11L Main / Stereo Speaker

2 Answers

Need to replace 11L tweeter


the best solution I've found is this:
1. Remove all the tweeter screws.
2. Take a thing metal rod (a coat hanger should work) and lightly tap the tweeter through the top port in the rear until it is loosened and comes out. The tweeter is totally sealed so you probably won't damage it if you need to do this to a working tweeter.

This method also works for the woofer but you need to be very careful to tap the frame or magnet of the woofer and not the cone.

Jun 25, 2008 | Quad 11L Main / Stereo Speaker

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