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6 ohm speakers with Onkyo HT-R520?

2665 Views 2 Replies 2 Participants Last post by  jkhering
I'm a bit of newb when it comes to speakers and I'm trying to fully understand the impact of speaker impedence and what I can and can't do with my receiver.

I recently bought the Onkyo 770 HTIB that comes with the R520 receiver. In the manual, it lists the specs below, specifically mentioning "Speaker impedance: 6ohm~".


Amplifier Section

Power output:

All channels: 130 W (8ohm, 20 Hz-20 kHz, FTC)

Dynamic power: 2 x 260 W (3ohm, front)

2 x 200 W (4ohm, front)

2 x 150 W (8ohm, front)

THD (total harmonic distortion): 0.08% (rated power)

Damping factor: 60 (front, 1kHz,8ohm)

Speaker impedance: 6ohm~

I know the speakers that came with the 770 are all 8 ohm speakers, but I have a pair of older/nicer front speakers that are rated at 6 ohm. My question is, can I hook up these 6 ohm speakers as the "B" speakers, or can I replace the fronts that came with the 770 and use these 6 ohm speakers as my "A" fronts instead? Or would it be too much for this receiver to handle? (would I run the risk of damaging the receiver?) Also, if I do hook them up as the B speakers, would I be able to run the A+B speakers together at the same time?

Thanks in advance!
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Looking at the electronic version of the manual on page 17 it states:

"Only use speakers with an impedance of 8 ohms or higher. Connecting speakers with an impedance of less than 8 ohms may damage the HT-R520."

So, that answers your first question. I'm sure you could hook them up and they'd work (at least momentarily), but leaving them for any length of time might tax the receiver too much and it'll shut down.

As to your 2nd question, if you have A and B on simultaneously then set A will switch to stereo mode. Meaning that only your front left and right speakers will play from set A + the two speakers wired to set B. I'm almost positive of this, but look at your manual to be sure.
Oh, whoops - I had looked in the manual this morning, but must have missed that. Thanks!
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