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JPF - TS212 TREBLE ISSUE

During a party with 2 TS212 + 1 TS215S, the highs suddenly cut off 212. No way to find the treble. The two speakers were not bought at the same time and have only ten nights on the clock. The volume was 25% of the max power. How to explain the phenomenon? I'm disappointed because I was happy with this system !
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  • Hey FOUCHARD Jean-Philippe,

    Thanks for posting!

    I'm sorry to hear that! From your description it sounds like the HF drivers might need to be replaced. If this happened to two units simultaneously then it's possible that there was a power surge that damaged internal assembly. In any case, I recommend contacting the Support Team for further assistance in setting up a repair.

    Let me know if you have any questions!
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  • Power surge .... really, it's a common fault of these tweeters, having an HF amplifier capable of driving 350 watts into an excuse for a compression driver naturally it's going to cook, what Alto should do is source a compression driver that runs at 75 to 100 watts but more efficient, and there are many of them on the market, but they are going to be larger and a tad more in cost but it won't fail so easily. I'm not going to recommend a suitable screw on driver, but having a good look it seems that there is only a few, there is one rated at 250 watts for around £20, from a company called BLASTKING, www.blastking.com and another one from a company called Bass Rockers BRHD1 rated at 150 watts RMS, power handling 300 watts for £25, but at that price its worth trying, just turn down the treble a tad.
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  • Its all down to cost and weight, people want a lightweight cabinet with lightweight drivers expecting it sound the nuts, albeit things have improved with Neodymium magnets and better voice coils with Class 'D' amps devoid of large toroidal transformers all good stuff to keep the weight down but to get that extra power that we all demand, there is a compromise you cannot expect a 3" voice coil to dissipate a 1000 watts say on a 15" driver, designers use at least 4" with the most expensive use up to 6" voice coils with good venting and for efficiency use large Neo magnets used by leading manufacturers like JBL, B&C, Precision Devices (PD) Electrovoice (EV) but these will last forever but will weigh a lot more.

    For my subs I use the 21" PD2150 driver ok it is a ceramic magnet and weighs 33 kilo's there is a Neo model available now but these are expensive and will last forever and would never be used in a active speaker cabinet, most times if you ever took say a 15" or 18" sub apart you will see a budget driver and definitely not a brand name unless you bought H&K or JBL if Alto did the price would reflect that.

    I'm not knocking Alto as they do look appealing and definitely good value for your buck but only good for small events and parties, no PA hire company would ever stock these for obvious reasons, I would use them as monitors and let the main PA do the work for front of house. They are fine if you're playing background music all night long but when you have a dance floor filled with revellers they will always want it louder and louder, they only fail because you forget to check the red warning light.
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