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Can the Rotel THX 991 handle sterio 4 ohm loads or is it best to leave it at 8 ohms ?!?!?!
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all Rotel amps should handle 4 ohm loads with easy (with the exception of a bridged 1066)
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I have a 991 and am powering a set of 4 Ohm Jamo's with a sensitivity of 87dB. It does so effortlessly. I was quite impressed when I first got it and still am.
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the 991 can handle 4 ohm easilly.
Speaker impedance is only an average rating. The impedance can very with the frequency. So a big bass reflex has a impedance as low as 3 ohm on the tuning frequency of the bass reflex port (ie at 30Hz) . But it can go as high as 20 ohms on the resonance requency of the midrange unit.
take a look at this : http://www.focal.tm.fr/gb/compo/midbass/courbes/images/8w5411.gif
See how at 40hz it reaches almost 80 ohms.
A good power amp, with good power reserves can drive an average 4 ohm load easily. I am always a bit reserved about amplifiers with 4-8 ohm switches. I am unaware of current rotel amps with switches like that. I thought my rb840bx4 had one. But I am not sure.
Marantz AV8802, Marantz UD8002, Rotel RB-991 and RB985mkii, Rotel RD960
Focal/Jmlab Electra 1028S, Electra CC, Electra SW1000S, Cobalt 705
Pioneer KRL-37V, Epson EH-TW8100, Kinkping CES-180 77"inchComment
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Was thinking I'm going to use it to power a sub ............... that's has two 4 ohm drivers. So if I'm hearing right, this should be no problem (?!!)Comment
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sure, go for it.
eh....that will be a sub with 2 x 200 watts power.
probably no neighbours or a house in the middle of nowhere ?
Marantz AV8802, Marantz UD8002, Rotel RB-991 and RB985mkii, Rotel RD960
Focal/Jmlab Electra 1028S, Electra CC, Electra SW1000S, Cobalt 705
Pioneer KRL-37V, Epson EH-TW8100, Kinkping CES-180 77"inchComment
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Heh, heh, heh
What I'm actually worried about is my pot lights falling out of the ceiling 8OComment
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