RRRush Posted June 17, 2004 Share Posted June 17, 2004 Anyone know what impedance the RF7, RC7, and RS7 speakers drop too(minimum impedance)? Quote Link to comment Share on other sites More sharing options...
SteelerFan Posted June 17, 2004 Share Posted June 17, 2004 I've heard the RF-7 can dip to 3 ohm's at times, don't know about the RC or RS. Hope that little bit helps. Quote Link to comment Share on other sites More sharing options...
nicholtl Posted June 17, 2004 Share Posted June 17, 2004 Could I just ask what impedance and ohms means, and what it has to do with speakers? I hear about it alot, but I only nod my head and smile. I actually have no clue what it's about??? Quote Link to comment Share on other sites More sharing options...
MrMcGoo Posted June 17, 2004 Share Posted June 17, 2004 The Klipsch rating is 8 ohms nominal on all of the Rx-7 speakers. Sound & Vision's May, 2002 issue reviewed the Reference 7 speakers. The RF-7s were rated at 6 ohms nominal with a dip to 2.8 ohms. The RC-7 was rated at 10 ohms nominal with the lowest impedance at 3.1 ohms. The RS-7 was rated at 6 ohm nomial impedance with the low poit at 3.6 ohms. Impedance is similar to resistance, but it is in AC circuits instead of DC. The impedance of a speaker varies with frequency. For example, when the impedance drops with a change in frequency from 8 ohms to 4 ohms (half) the current required to drive the speaker doubles per Ohm's Law. Many amplifiers, especially receivers, cannot produce the needed current. An amplifier that has low output impedance and that can "double down" with both 4 ohm and 2 ohm loads can produce flatter frequency response and better bass. More detail is also reproduced in the speaker output. Bill Quote Link to comment Share on other sites More sharing options...
RRRush Posted June 17, 2004 Author Share Posted June 17, 2004 MrMcGoo, Well put, I appreciate the #'s. You've been a huge help. My addiction to this forum is not going to be good for my wallet. Quote Link to comment Share on other sites More sharing options...
Deang Posted June 17, 2004 Share Posted June 17, 2004 Bill, do you have that issue of S&V. I'm pretty sure the RF-7 hits its low spot at 3.8 ohms Quote Link to comment Share on other sites More sharing options...
MrMcGoo Posted June 18, 2004 Share Posted June 18, 2004 Dean, I have kept that edition of Sound & Vision and copied the numbers correctly. Home Theater's August 2002 review put the minimum impedance of the RF-7s at 3.53 ohms at 9.9 kHz and a phase angle of -68.48 degrees at 74 Hz. The RC-7 had a minimum impedance per HT Mag of 3.35 ohms at 176 Hz. Those are the only reviews that I have kept for the RF-7s. I keep drooling when I read the reviews of your crossovers. Too bad I blew my budget when I bought a Sunfire amp to drive the difficult impedances on the Reference 7s. Bill Quote Link to comment Share on other sites More sharing options...
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