Receiver compatibility for Pioneer SP-PK21BS speakers

[srivenkat]

Hello,

I am looking at getting the Pioneer SP-PK21BS speakers and am
now looking for a compatible receiver.

I am looking at the Sony STR-DH520 but am unable to determine
if this receiver can drive the speakers which are rated at 6 Ohms.

Specs for the Sony:

Output Power
(8Ohms 1kHz) THD : 1%
(8Ohms 20-20kHz) THD : 0.09%
8Ohms 1kHz : 100W + 100W
8Ohms 20-20kHz : 90W + 90W
Output Power (JEITA 10%)/ Rated Output Power(0.09% 20Hz-20kHz 4Ohm) : 10%
Output Power (JEITA 10%)/Rated Output Power(0.09% 20Hz-20kHz 8Ohm) : 130W
Total : 945W (135W/ch x 7 (8?, 1kHz, 0.05% THD))

4 Ohm/8 Ohm Switching : 8 Ohm only

Does the last sentence above (or any of the earlier lines) means
it cannot drive the 6-Ohms-rated Pioneer speakers?

Thanks.

 

[markw]

The specs for that receiver show ratings for 4 ohms. You should be fine with your 6 ohm speakers.

 

[srivenkat]

I also looked at the pdf specifications at Sony site (unable to post the link as
my posts haven't crossed 5) and surprisingly it doesn't mention 4 Ohms at all.

Also, I am curious as to what "4 Ohms/ 8 Ohms switching" means.

Thanks again.

 

[zieglj01]

Not bad for Sony - here are the measurements.
Sony STR-DH520 A/V Receiver HT Labs Measures | Home Theater

They will handle the Pioneer speakers

Also check into the Denon 1612, and the Pioneer 821 receivers.
http://www.amazon.com/Denon-AVR-1612-Channel-Theater-Receiver/dp/B004U403WM
http://www.newegg.com/Product/Product.aspx?Item=N82E16882117397

 

[agarwalro]

I am curious as to what "4 Ohms/ 8 Ohms switching" means.

To oversimplify it, the setting protects the receiver from electrical or thermal failure when connected to 4 Ohm speakers and the amp section is being pushed beyond its limits. Those concerns are better addressed through over specifying the needed power, good amp design and implementation and judicious user operation of the electronics. Therefore, for the most part, the setting allows the receiver to be "low impedance certified" while hampering full power delivery. More details here, Setting the A/V Receiver Impedance Selector Switch.

Based on (fwiw) measurements from this review, the Sony will be fine.

The SP-BS41-LR’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.62/–4.50 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 67 Hz, and the –6-dB point is at 52 Hz. Impedance reaches a minimum of 6.97 ohms at 224 Hz and a phase angle of –38.35 degrees at 129 Hz.

The SP-C21’s listening-window response measures +1.35/–3.88 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +0.98/–4.18 dB from 200 Hz to 10 kHz. The –3-dB point is at 81 Hz, and the –6-dB point is at 62 Hz. Impedance reaches a minimum of 6.31 ohms at 8.1 kHz and a phase angle of –39.38 degrees at 3.4 kHz.