Is this enough power?


Does a 30w per channel 845 SET amp have enough power to drive 88.6 db at 6 ohm speakers at moderate level of volume. room is 14x18x9 and open at one end into the kitchen. mostly listen to jazz and classical.

Thanks
audioman999

Showing 5 responses by audioman999

Magfan - is there anywhere i can go to find out more about phase angles. that is something i am not familiar with. Does it have something to do with the slope of the impedance curve at a specific frequency?
Thanks for all the responses.

I found an impedance graph for the speakers.

Between 1k and 20k it is 6 ohms and peaks at 12 ohms at 5k.

From 1k and below it is ruler flat at 4 ohms.

Does this new info alter any of the comments?

the amp does have a 4 ohm and 8 ohm tap. Not sure which one would be the best to use.

Thanks

I also found this and used google translate. Is the frequency response and/or axel deviation comment related to phase angles? Not sure if the wording is different because of the translation.

"Also by measurement the relationship between S-1EX and S3-EX is unmistakable. The frequency response looks almost like drawn with a ruler and extends down to about 40 Hertz. From five kHz is a slight ripple into play when the axial deviation of 30 degrees (dashed line), however, is negligible. Straightened out into the room, the Pioneer actually sounds a bit faster and more coherent dunk. The impedance is danzverlauf critical, and the jump response is in order, with the enormous time accuracy of their sister, it can not record the S-3 EX bass but because of the delay."

Thanks
Thanks again for the explanations. I finally found a graph with phase.

Looks like the lowest phase angle is approx. -40 degrees at 30Hz where the impedance is 10 ohms. Other than that dip, the phase angle is above 0 degrees.

From what I understand from the above posts, this means this should be an easier speaker to drive and that the 30w of SET should be enough.

Have also found that most tests show that the speaker is 90db/2.83V/1m. Maybe the manufacturere specs are conservative.
Thanks again.

I did look at the links and found them to be a wealth of technical information that for the most part was over my head.

From these posts and my research into the Pioneer EX speakers, i do have a much better appreciation for their design/charts, etc...

Regardless of the actual specs, the speakers sound amazing. even paired with the SET amp. i do realize that there will be some compromises depending on volume and typed of music.

Once again, thank you for all the information.