"The" Onkyo TX-SR875 Thread - Page 93

I do not have a 1080p signal to use yet, so I am just guessing, but are you sure the Reon will not touch it? Not even for contrast, color, luminance, or saturation? I tend to believe that you can use these controls also over a 1080p signal.

Hi Enzo it will have control, I got my new 875 yesterday, but only up to 1080p60.
Do not understand why is not been enabled for 1080p24sources. I am using a PS3.
Can anyone explain ,please?? Any technical reasons for doing it this way??
Regards Alex

Are there any settings on the 875 that will prevent my subwoofer from turning on. My sub will not automatically turn on w/ the 875. I need to unplug the rca cable from the sub and plug it back in to turn it on.

What do you have the level for the subwoofer set to on your 875? If it's set to -12 dB or something close to that, you might not be sending a strong enough signal to your sub to turn it on. In that case, turn the volume knob down on your sub and increase the trim on your 875. For best results recalibrate all your channels with a sound level meter.

Does the 875 have a phono input/output function? I have a pair of KEF 107s as my main speakers and they must be used with the equalizer designed for them. It's usually plugged into the pre in/out. Are the audio management function defeatable?

I am having this same problem. I did notice today that if I tell the sat receiver (HR21 DirecTV) to NOT send Dolby Digital, the lag goes away. With Dolby Digital set to "ON" on the DVR, when I fast forward, the little Dolby Digital light goes out, then when I stop fast forwarding, the sound is off until the light comes back on (.5 to 1.5 seconds). Any other resolution on this?

Hi guys.
I am pretty new to the receiver world and considering getting one in the near future. I have read the Onkyo 875 manual and there are some specifications that I don't quite understand. I hope you guys can translate them so I can have better understanding of where I'm standing at.

- 140 watts minimum continuous power per channel, 8 ohm loads, 2 channels driven from 20 Hz to 20 kHz, with a maximum total harmonic distortion of 0.05% (FTC)
160 watts minimum continuous power per channel, 8 ohm loads, 2 channels driven at 1 kHz, with a maximum total harmonic distortion of 0.7% (FTC)
170 watts minimum continuous power per channel, 6 ohm loads, 2 channels driven at 1 kHz, with a maximum total harmonic distortion of 0.1%.
Basically I don't know when do the 140, 160 and 170 watts come in respectively. Which one is for the stereo mode and which is for the surround mode?

- What is Dynamic power?

- What does the unit xx mV / xx kohms of Input sensitivity/impedance mean?

I appreciate in advance.

The 875 has pre-ins and pre-outs that should work for incorporating the KEF equalizer.

You can defeat all audio processing on the 875 by using Direct or Pure Audio mode, or you can just turn off the 875's equalizer.

Anyone know what the RCA pre-out voltage is ? Thanks

None of your questions matter at all. There is plenty of power to drive normal speakers with normal sensitivity/efficiency as loud as you'll ever want to listen to them. You can't hear the difference betwee 140 and 160 watts anyway.
The difference between 140 watts and 280 watts is 3 dB of sound pressure level in your room. That's noticeable, but not very big. For the sound to be twice as loud as 140 watts, you would need about 1300 watts per channel. So now you know why 140 or 160 or 170 watts is not important.

All of the other specifications for the 875 are "normal" for audio components. They don't really mean anything unless they are very high or very low - and that is not a problem for the 875.

It changes constantly with the music signal, just like it is supposed to.

The specification is completely "normal" - the same reference level as any line level output - industry standard. It will be fine with anything that handles line level inputs. The line level outputs easily drive any amp I have to full output - and also drive a stereo preamp to full output levels (into a stereo amp).

I need some help with my 875 folks... I just set it up this weekend.
When I run a test tone through it, I can hear all 7.1 channels. When I put a DTS-MA signal through it, I get the proper DTS-MA logo showing up on the receiver but I do not get the back-rear-surrounds to show up nor does sound come from them. No matter what I put through it, I have yet to get 7.1 sound out of the system, only 5.1. Do I need to run the automatic speaker setup or something? I have only manually set it up so far. I do have the rear-back-surrounds set up as 2 speakers that are over 4 feet apart. What am I missing? Thank you!

Most DTS-MA soundtracks are 5.1. The additional speaker icons on your front panel will only light if the soundtrack is 6.1 or 7.1. To get sound out of your rear speakers, you need to use one of the matrixing listening modes Try THX Ultra 2 Cinema or PLIIx. Just press the Surr button and select one.

Video switching.
Just a question about the display on the 875 when I switch inputs.
Does the display show any info on the video signal when you switch input?
Like HDMI 720P or HDMI through? I imagine it used to show HDMI trough before, but now it just show the Sound prossessing(Pro logic etc).

Any input?

I got a STP box via s-video and PS3 via HDMI connected.

You know, that crossed my mind too. But, I thought to myself, why would the most advanced audio "encoding" today only use 5.1... I thought there was no way, so thanks for the education! I know DTS-MA is capable of 7.1 but it is up to the producers of the disc to implement it, right? BTW, I don't know if I mentioned the BluRay I tried, but it was Fantastic 4 Silver Surfer. On the HD-DVD side, I tried Unforgiven but it was encoded as Dolby Digital Plus.
Thanks again!

How much clearance is recommended for the top of the unit to allow heat to escape?

The 875 does tend to run hot if you are using the Reon chipset for video upscaling/de-interlacing. If you can get 4-5" of clearance over the top of the unit then you could add in an extra computer case fan to allow adequate ventilation for sure.

The 875 runs hot enough to kick the cooling fans on my FIOS STB into high gear, when the FIOS STB is running in low power mode. I haven't found the 875 hot to the touch, but the continuous heat output from it is noticeable.
I have a shelf 2" above my 875, my STB and DVD player on top of the shelf. The shelf is solid wood/particle board/whatever, and it's about 3/4" thick and like I said above, the heat from the Onkyo will turn on the fans in the STB.
Honestly, heat management seems better since I reflashed the 875, but it still runs warm. It blows my mind to look into the 875 and NOT see a heatsink/fan on the Reon.

What I would recommend is not running anything directly above the 875 and giving it as much clearance as you can. It's not going to hurt the system to run it hot like this, but the heat wash from the 875 cannot be good for other electrical components. I will most likely rearrange my electronics to do exactly this sometime soon.

I could be wrong, but I think whether a DVD soundtrack is 5.1 or 6.1 or 7.1 is determined by the producers and the sound engineers, not by what codec gets used on the disk. If the theatrical release was 5.1, the DVD will be 5.1 regardless of whether the DVD soundtrack is DD or DTS-MA.

Here's a possibly stupid question.

Just got my 875 back from service and damned if I can't find it's designated (no ground pin) power cable. Now I've got plenty of extra standard 3 prong power cables laying around, can I use one of those - or do I run risk of damaging my unit?

Hey guys, I've been out of loop for a little while. It's always hectic for me this time of year. I just want to confirm that the firmware for the 875 added:

Noise Reduction Control
Edge Enhancement Control
Brightness Control
Contrast Control
Saturation Color

Thanks guys!

Larone

...and how do I check my firmware version? Thanks!

how are firmware updates obtained without usb or lan? Service center?

While your system is ON, press the Display and Stand By button, should display the firmware version on unit's diaply.

Any one tried the MUTE button on 875's remote?
Mine instead of muting the receiver sets to maximum volume, which is very wiered. My firmware version is still 1.03.

The plug on the back of the receiver doesn't have a ground pin, so it just won't be connected to anything. So it shouldn't matter one bit.

Yes, that is exactly what I wanted to do, but I tried this last night, and it doesn't work. It is as the wording of the manual suggests it is... If you switch the speakers to bridged mode, no 5.1 or 7.1 (or even 3.1) options are available... only the two speaker listening modes can be selected. So essentially, if you bridge the fronts, you've turned the 875 into a relatively high powered stereo receiver, and disabled it's surround sound processor.

There's no 1 easy answer for this. Too much depends on how much clearance there is on the sides and whether the shelf the 875 sits on is ventilated or solid or whether you have raised the 875 on the shelf to get more clearance at the bottom.

If you are enclosed on 3 sides (bottom, left, and right) with a completely open back and front, I would want to see 9" of clearance above the 875. If the bottom is the only side that is close to anything, 6" above the 875 would be OK.

If the 875 is in an entertainment center with a closed off back (maybe 1 hole for cables and power cords), you'll need 12" of space or more because that enclosed space is going to heat up sigificantly.

I measured the temperature at the top of the 875 again today... it is reading 115 degrees now, 3 months ago it read 123 degrees but it was probably 5-8 degrees warmer in the room 3 months ago too. Someone attributed the firmware update to 1.04 for appearing to make the 875 run cooler... if that was the case, the 875 would pull less power (power dissipation = heat) after the firmware update, but the 875 pulls the same 200-210 watts doing all the processing but no amplifiers running (audio muted) - that did not change before vs after the firmware update.

Any power cord will work, 2-pin or 3-pin. The supplied power cord is AWFULLY SMALL for a receiver with 7 amplifier channels rated at 140 watts. Find the biggest fattest power cord you have and use that one. The smaller the wires in the power cord, the less ideal it will be for anything with power amplifiers in it. If all your power cords are on the small side, getting a newer-bigger one wouldn't hurt. If you are sorting through 3-wire power cords, they are going to be 1/3 bigger just because of the extra wire so don't let that fool you too much. Using a power cord that's too small is like using a garden hose to fight a house fire - the hydrant and fire department hoses are a bit more effective (-:

It's not weird, you've just been in the Setup menu changing things - or somebody else has been changing things.

Menu 6.1 Volume Setup
Volume Display - Relative
Muting Leve - -infinity (looks like an 8 laying on it's side with a minus sign in front of it.)
Maximum Volume - off
Power On Volume - Last