Question about Jensen M-1 Speaker

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Blown "S.T.A.R." tweeter on the M1

I have a blown "Symmetrical Throat Apex Relief" driver on one of my Jensen M1's. Can I get another one somewhere without paying an arm and leg? I would prefer a new one rather than getting one off e-bay. Should I get 2 to replace the one in the other speaker as well? Is there an upgrade {aftermarket or Jensen} to this driver that matches the acoustic characteristics of the M1? The markings on the blown driver are D04-0090 and 8H745. Any help is appreciated Tks.

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SOURCE: someone replaced the subwoofer on a jensen jps12


Posted on Aug 08, 2009

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Have 2 jbl 615 get good base and sub but neither tweeter playing

You will need to determine if it's the amplifiers or the tweeter themselves that are not working. If you open up the cabinets and check each tweeter with an ohm meter for continuity it will show if the tweeters are working, in which case the amp is the problem. if the meter shows that the tweeters are blown, you should still hook up another tweeter or speaker to the horn amp to see if it's blown and therefor took out the tweeters.
If any of this sounds complicated, you'd be best off taking the cabinets to the repair shop.

Mar 16, 2015 | JBL Speakers & Subwoofers

1 Answer

I lost the treble on both Alesis Monitor 1 speakers. The treble is good on the amp output toward the speakers. I'm thinking they went out one at a time and I didn't realize it until I lost the...

It's probably blown tweeters. But if you want to spend the money on a hipshot guess, try to find the the crossovers somewhere first; then find the readily available tweeters if/when that doesn't work out. Google "alesis monitor one MK2 tweeter".

You could test the tweeters by just removing one non-functional tweeter and wiring it directly to the speaker leads and with REALLY LOW volume containing NO BASS see if it makes any sound, which would prove it does/does not work.

Going forward, if the speakers sound stressed at high volume - THEY ARE. Too much power or too much distortion (overdriven amplifier) will kill speakers.

Sep 16, 2011 | Alesis Monitor One Mk2 Speaker

1 Answer

Subwoofer makes high pitch whistle when turned on. Blown tweeter?

Subwoofers don't have tweeters and NO speaker makes spontaneous sounds unless it's mechanically breaking apart - then it dies and is silent.

I'd look for an electronic component that's blown. No one online can do that part for you.

Then you can say, 'oh, I see (something blown)' and spend time and money obtaining and replacing the low-hanging visible fruit only to find that the ROOT cause is not visible and you still have a problem.

OR let a hands-on tech take a look at it.

Jun 07, 2011 | JBL SCS160SI System

1 Answer

I have no sound coming from the tweeter in my b&w 602

Probably blown, tweeters are much more fragile than lower frequency drivers. If you know how to use an ohmmeter properly you can test it for continuity if it's a good quality meter (cheap ones can blow it out themselves in testing).

Jun 01, 2011 | B&W DM602 S3 Speaker

2 Answers

How do i tell if my problem if the high freq diaphram or the cross over

The crossovers in professional speakers don't fail that easily. It could be a blown tweeter. To confirm remove the metal grille-- remove the screws of the Horn Tweeter -- remove the cable connectors on the tweeter terminals ( Red and Black wire ). Now if you have a multimeter put it in Ohms range and touch the probes on the tweeter terminals-- It should show a reading betwwen 4 to 8 Ohms depending what is written on the back of the tweeter magnet. If you do not have a Multimeter you can take an ordinary cell/battery ( 1.5v ) from a TV remote and touch the terminals of the Horn Tweeter with the battery. + to the tweeter + ( a small red dot or mark will be there on the tweeter ) and -- to the tweeter -- . When you touch the terminals or give 1.5 volt supply the tweeter will make a scratching noise.
If you do not hear the scratching noise - it indicates a blown tweeter coil and will need replacement.See link below for spares:-
But if it does, you are in trouble and will need professional help from a electronic technician.
Could be blown HF Amplifier, suspect the crossover last. They seldom fail.
Revert back for more help

Apr 02, 2011 | JBL PRX515 Speaker

1 Answer

Jbl e80 no sound coming from tweeter

Sound like the tweeter is blown, take to local jbl agent for service.

Sep 16, 2009 | JBL Northridge E80 (Single) Main / Stereo...

2 Answers


The JRX series have weak HF drivers, only rated for some 25 watts or so. Are you running in Bi-Amp or straight? Could be bad capacitors in the crossovers. Could also be clipping of your amp, a common cause of failure is using too small an amp and pushing it past it's clean operation limits. Speakers don't like square waves. Was the "Clipping" light flashing on the amp?

Jan 06, 2009 | JBL EON 15-G2 Powered DJ Speaker With EQ...

1 Answer

The tweeters in my yamaha NS-515F have blown. Any ideas where i can purchase suitable replacements? is a popular source for loudspeaker components.

Also, are you sure the tweeter's blown, and not a crossover component? carries many electronic components that could be used in crossovers.

Dec 02, 2008 | Yamaha NS-515F Speaker

4 Answers

Wharfedale Modus One

The tweeters are probably blown, i had the same problem.
You can test this by placing the cable on the dismanteled crossover at the back of the speaker. colour blue/yellow.
No high volume please.
for pictures.
If the tweeter is blown it can be dismanteld with the aid of a screwdriver, horizontally.
Place it between the tweeterbowl and the ring which has the mark wharfedale on it. The tweeter comes loose. On second hand sites you can buy little speakers, like modus one or two's with the same tweeters for a good price and put them on your larger speakers.

This how i repaired 2 of my 4 modus eights.

good luck Danny Mol
the netherlands

Jan 15, 2008 | Wharfedale Modus One-Six Speaker

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