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71.84.126.28
Its a long story.
I bought 2x Gemini GSM3250 cabs (dual 15" subs, 4 tweets, and a horn. rated for 300 watts rms 1200 watts peak). You can get em new for 150ish so they are dirt cheap. One arrived in the mail and the other was on back order. I already had my amp so I hooked it up with the one cab. The amp is a Behringer EQ1200 600 watts per channel.
I ran with just the one cab for a few days at VERY low gain. Never put it above 1/4 max gain.
One morning I was listening to it and all of a sudden I heard a loud POP sound that almost knocked me out of my chair. The pop was followed by a constant hum or buzz. I disconnected all audio sources from the amp, and I still got the buzz so I returned the amp as BEH said it must be a faulty component (in the amp).
After a few weeks I got my 2nd cab and a new BEH amp. I hooked it all up and the speaker the pop was heard from was blaring really bad. Especially on bass notes. I figured it was blown by the bad amp so I'm having it replaced.
That particular cab had some issues from day one though. When we were unpacking it, it had something rattling/loose inside. Also one of the handles was on upside down.
So here is what I am wondering...
1. Was it a faulty component in the amp that caused the pop and buzzing?
2. Was 600 watts just too much for the speaker, causing it to blow without my knowledge, thus changing the ohms , and legitimately fry a good amp?
3. I've heard the rule is the amp can be 2x the wattage of the cab if you're not pushing it too hard. But maybe its not the case for these extreme cheap Chinese models?
I just don't want the 2nd cab to get here, and I blow up the amp again. Maybe I should just buy a 600 watt amp?
Thanks
-x
Follow Ups:
So sorry to be blunt.......You bought junk, and got exactly what you paid for.
otari
My mother-in-law, after seeing the Levinson 33H amps in my listening room: "Those are the nicest electric room heaters I've ever seen".
Its blunt yes, but its also so very helpful. I shall take this new found enlightenment and...
1. Buy a system I can't afford?
2. Have no system at all?
I don't like either of those options. Besides, this was not question solely about the specific equipment.
Thanks!
x
I bought some Eminence 15" drivers, cast frame, made in USA, for something like $75 each. 80 oz magnet, about 99 dB efficient. In a pinch you could start with piezo tweeters, then add Selenium or Eminence compression drivers and horns and proper crossovers.
The problem with paying too little is that you end up with junk that's worth even less. White van quality speakers covered in rat fur carpet. Living-room karaoke-grade amps with too many blue LEDs and imaginary power ratings. No decent amp will put out DC when it fails... there must be an output relay or crowbar SCR to protect the speakers.
There's plenty of used power amps out there from the likes of Peavey. And some Behringer stuff that is "not bad", like the EP1500 and EP2500.
No excuse for junk equipment. Save up a while longer or shop used at places like Craigslist.
Forgive my bluntness.....I am not politically correct.
Example of deals out there: A pair of 2 month old JBL Eon315 powered tops and 2 month old Eon 518S 18" powered subwoofer and stands. Just like new. I paid $700 from my local Craigslist. I use these for small DJ gigs. My base rate is $375 for 4 hours, and they have already paid for themselves and are now making me money in the month I've had them.
Shop smart, do better.
best,
Otari
My mother-in-law, after seeing the Levinson 33H amps in my listening room: "Those are the nicest electric room heaters I've ever seen".
Ok here is what Im pretty sure happened
The pop and hum you are hearing was one of the BEH1200 channels went
bad and was sending the rail voltage or what they call DC voltage
When you apply such a large amount of DC voltage it pushes the woofer
out all the way and destroys the voice coil of the loudspeaker
When the amp goes DC you will hear humming come out of the tweeters
and they will not blow because there is a series capacitor that prevents
the DC from taking out the tweeters as well...but you will hear the hum
out of the tweeters
My guess is the second amp is ok and the woofer/s are toast on the original cabinet
Also, the wattage rating is just fine for the amp speaker combination
That is the funniest story I've heard all day! Thanks!
:)
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