Yamaha RX-Z9 and 4ohm speakers?

[MAX661]

Since Gene and others are extremely fimiliar with the RX-Z9 I figured this would be the best place to ask this question.

I currently own a Yamaha RX-Z9 and am thinking of purchasing the PSB Platinum CHS80 L/C/Rx3 and S2 Rear/Sidesx4. I will be adding an external amp down the road for the front soundstage{after money relenishes}, but I was wondering if the RX-Z9 would be able to handle the 4ohm load for the meantime?

Thanks to anyone in advance who has the answer to help me...

 

[gene]

Yes the Z9 will handle those speakers just fine. It has one of the most robust amp and power supply designs as far as receivers go. Make sure you leave the impedance switch set to 8 ohms or more to preserve dynamic range and reduce risking the chance of clipping at high power levels.

Also be certain you give the Z9 plenty of room to ventilate. It runs hot even at idle.

 

[MAX661]

Thanks for the extremely quick reply Gene, I appreciate it!

 

[gmichael]

I just happened to be on Yammie's web-page for the Z9. Here are the specs.

http://www.yamaha.com/yec/products/receivers/RXZ9_spec.htm

Looks like 4 ohm speakers are no problem.

Minimum RMS Output Power (8 ohms, 20—20,000 Hz, 0.015% THD)
Front Channels 170 W + 170 W
Center Channel 170 W
Surround Channels 170 W + 170 W
Surround Back Channel 170 W + 170 W
Presence Channel 50 W +50 W
High Dynamic Power, Low-impedence Drive Capability Yes
Dynamic Power/Channel 8 ohms 210 W
6 ohms 260 W
4 ohms 340 W
2 ohms 580 W
Linear Damping Yes
Damping factor (8ohms, 20-20,000 Hz) 200 (speaker A)
Input Sensitivity/impedance Phono (MM) 2.5 mV/47 k-ohms
CD 200 mV/47 k-ohms
Frequency Response 10-100,000 Hz +0, -3 dB
Total Harmonic Distortion (20-20,000 Hz)
CD (Front/Center In, Sp Out, 85 W/8 ohms) 0.005%
Signal to Noise Ratio (CD, 250 mV) 100dB
Speaker/Headphone Tone Control Characteristics (front/center/subwoofer)
Bass Boost/Cut +6 dB/-6 dB (50Hz)
Turnover Frequency 125 Hz/350 Hz/500 Hz
Treble Boost/Cut +6 dB/-6 dB (20Hz)
Turnover Frequency 2.5 kHz/3.5 kHz/8 kHz
Manual Graphic Equalizer (front/center/surround/back/presence)
f=63Hz, 125Hz, 250 Hz, 500 Hz, 1kHz, 2kHz, 4kHz, 8kHz and 16kHz,
Q=1.2 Step=0.5 +6 dB/-6 dB
YPAO (Yamaha Parametric Room Acoustic Optimizer)
f=63Hz- 16kHz +6 dB/-20 dB, 10 bands
Crossover Characteristics (subwoofer out) 40, 60, 80, 90, 100, 120, 160 and 200Hz
Cinema Equalizer
High Shaving Filter Frequency 1,000- 12,700 Hz
Boost/Cut +6 dB/-9 dB
Frequency 1,000- 12,700 Hz
Boost/Cut +6 dB/-9 dB

VIDEO SECTION
Video Signal Level 1 Vp-p/75 ohms
S-Video Signal Level Y 1 Vp-p/75 ohms
C 0.286 Vp-p/75 ohms
Component Video Signal Level Y 1 Vp-p/75 ohms
Pb/Cb, Pr/Cr 0.7 Vp-p/75 ohms
Signal to Noise Ratio 50dB
Monitor Out Frequency Response
Composite/S-Video Signal 5Hz- 10MHz-3 dB
Component Video Signal 5Hz- 100MHz-3 dB

TUNER SECTION
FM 50dB Quieting Sensitivity (1khz, 100% modulation)
Mono 17.3 dBf
Stereo 39.2 dBf
FM Selectivity 400kHz 70dB
FM Signal to noise ratio Mono/Stereo 76 dB/70 dB
FM Frequency response 20-15,000 Hz +0.5/-2 dB

GENERAL
Standby Power Consumption Less than 1 W
Dimensions W x H x D 17-1/8" x 8-5/16" x 18-7/16"
Weight 30 kg; 66.1 lbs.

 

[agarwalro]

RX-Z9 would be able to handle the 4ohm load for the meantime?

It will comfortably handle the 4 ohm speakers... ANYtime. Seriously... what do you think makes it so huge .

And if you have even the slightest of doubts left, a review of the Z9 is here, Z9 on AH

 

[mulester7]

It will comfortably handle the 4 ohm speakers... ANYtime.

.....(waving Z9 flag).....

 

[darkraver]

Yamaha

All,

I have some Yamaha stuff too.
Yeah they definately run hot when pushing them really hard or when it is tropical outside. Just put a simple extra home ( table ) ventilator near your rack and you will see how drastically the temperatures will drop.
These table ventilators you can buy really cheap............