sunfire 300x2 - protecting my speakers

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murdox55
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sunfire 300x2 - protecting my speakers

Post by murdox55 » Tue Feb 12, 2013 2:09 pm

i have a sunfire tgII along with the 300x2 amp, driving a set of ohm f`s, which are rated at 200wpc. there is also an infinity psw310w sub. the sub is rated at 400w rms...700 peak. adjustable crossover from 50hz to 150hz. one active 10"and 2 passive 10".....along with the R.A.B.O.S. kit. the tgll crossover is adjustable from 80 to 120hz in 10hz increments. after adjusting the settings on the sub,(after running the rabos program), the final adjustments were frequency - 49hz....level - 7.1db and a width of 17%.
my 2 questions are : where should the crossover be set on the tgII...the manual recommends setting at 100hz or lower using a sunfire sub. and would installing a harrison lab fmod hi-pass low rumble sub sonic filter on the amp, protect the speakers from any potential damage....and if so, should i go with a 20hz or 30hz.
many thanks in advance

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kingman
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Re: sunfire 300x2 - protecting my speakers

Post by kingman » Tue Feb 12, 2013 5:03 pm

To protect the Ohms you nee to put an inline fuse in the negative side of the speaker cable and I would say a 3 amp fast blow fuse. This will be close as I would overprotect them if intending to push them hard. Best fuse is the volume knob! :lol:
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Re: sunfire 300x2 - protecting my speakers

Post by TNRabbit » Tue Feb 12, 2013 6:07 pm

A slo blo is better for speaker protection. I'd start with a 2 amp.
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Re: sunfire 300x2 - protecting my speakers

Post by kingman » Tue Feb 12, 2013 6:47 pm

I bow to Rabbits superior wisdom!!! :lol:
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Re: sunfire 300x2 - protecting my speakers

Post by MRHP » Wed Feb 13, 2013 10:17 am

I have played with those F-Mod inline bass blockers and they make everything sound like mudd.
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Re: sunfire 300x2 - protecting my speakers

Post by jjptkd » Wed Feb 13, 2013 10:41 am

I was under the impression that slow-blow fuses were for stage or concert speakers and fast blow were for home speakers.. :-k :-k logic being if you're performing etc you might push your gear harder rather then stopping to replace fuses where at home you want them to blow right away.
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Re: sunfire 300x2 - protecting my speakers

Post by elgrau » Wed Feb 13, 2013 1:18 pm

Perhaps Gary was implying that you don't want the fuse to blow from a high current split second musical spike/peak 'cause that split second of high watts won't harm the speaker. But an extended period of high wattage would...hence the use of a slo-blo fuse. Just speculating... Personally, I don't like speaker wire fuses...seems to defeat having "garden hose" sized mega shielded wires EXCEPT for that tiny little (unshielded!) fuse filament. "Clean" high watts does not generally kill a speaker...just distorted high watts, is the general consensus anyway... And I also agree that using your volume control is a pretty good "fuse" as well: if your speaks can only do 200 watts, don't turn up the volume to 300 watts (need power meters or LEDs like on most Carver amps for this, but there are other ways of measuring the power out to the speakers as well....note where this power limit is on your volume control and don't go past that mark...simple!)....Ed
Last edited by elgrau on Wed Feb 13, 2013 1:33 pm, edited 3 times in total.
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Re: sunfire 300x2 - protecting my speakers

Post by hewlew1 » Wed Feb 13, 2013 1:23 pm

I still remember the day I called Cerwin Vega tech support because I was blowing fuses. He asked me what I was using for amplification I told him A Carver M 500 T . He said that is nice clean power and not to worry go ahead and install 3 amp slo blow fuses in the speakers I have been a happy camper ever since.
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Re: sunfire 300x2 - protecting my speakers

Post by wrstps » Wed Feb 13, 2013 1:36 pm

I too have had Ohm F’s and there is a saying among those in that circle: “200 watts to make them sing and 201 watts to blow them up”! Be careful, they are very expensive to repair and I only know of two companies that repair the drivers properly. Have you had them serviced by the factory? The batting replacement helps the lower end and there are some upgrades available.
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