RLM Posted April 4, 2007 Share Posted April 4, 2007 I have question on The RF-7 wiring in there boxes. They are 8 ohm and I want to bring them down to 4 ohm, so I can get more power out of my amp, is this possible by changing there wiring to parallel instead of series. Can anyone give me advise or am I shooting in the dark. Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted April 5, 2007 Share Posted April 5, 2007 Actually the RF-7 drops down to around 2.8 ohms at a couple points across the frequency spectrum. I'd advise in not re-wiring anything since they are a very difficult speaker for most amps to drive right out of the box. The ohm rating of a speaker is not a linear rating that stays the same at all frequencies, most speakers have huge peaks and valleys in their ohm resistance from single digits to over 100 ohms. Quote Link to comment Share on other sites More sharing options...
Speedball Posted April 5, 2007 Share Posted April 5, 2007 Save your pennies and watch this forum because once in a while a qsc pro amp comes up for sale for about 300 bucks, they will light a fire under those rf-7's. Good Luck. Quote Link to comment Share on other sites More sharing options...
Dylanl Posted April 5, 2007 Share Posted April 5, 2007 Actually the RF-7 drops down to around 2.8 ohms at a couple points across the frequency spectrum. I'd advise in not re-wiring anything since they are a very difficult speaker for most amps to drive right out of the box. The ohm rating of a speaker is not a linear rating that stays the same at all frequencies, most speakers have huge peaks and valleys in their ohm resistance from single digits to over 100 ohms. You couldn't be more correct. I had trouble driving my pair with a 150 watt Marantz at high levels without the clipping lights comming on. I never could understand it the SPL level is high but when heavy bass was needed they would drain an amp flat. Quote Link to comment Share on other sites More sharing options...
michael hurd Posted April 5, 2007 Share Posted April 5, 2007 I clipped my QSC driving my RF3II's, and it is rated to do 550 wpc into 8 ohm stereo ( 20 - 20khz ) 600 at 1khz. I can say that they still sounded pretty darn good and held up well. I killed a tweeter after about a half hour marathon, but I found the treble to be boosted in my Marantz AVR. Abuse... pure and simple. That amp never got hot enough to cycle the fan at high speed.... even at this level. Dynamics were uh... dynamic. Well recorded kick drum with little compression would light up the clip lights, while the average level ( as measured with a rat shack LED power level meter was about 10 watts ) In an instant, the LED's would register 200wpc, ( highest the meter goes ), then back down to 10wpc. Quote Link to comment Share on other sites More sharing options...
RLM Posted April 5, 2007 Author Share Posted April 5, 2007 What is a qsc pro. thanks for the tip. Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted April 6, 2007 Share Posted April 6, 2007 QSC is a company who makes some serious amps that are mainly for professional use but can many times be used in home applications for power hungry speakers such as RF-7s. Their PLX series seems to be the best for home use. Every now and then someone on here sells one and you can also find them on eBay or probably AudiogoN. Quote Link to comment Share on other sites More sharing options...
turbobusa65 Posted April 13, 2007 Share Posted April 13, 2007 I fully agree with Wuzzzer these speakers really wake up when you feed-um some power!!! Quote Link to comment Share on other sites More sharing options...
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