Question about Sony STR-D865

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What power rated speaker shoud I use with my str-d865

I have a STR-D865 and do not have the specs on the output power. I need new speakers and do not know the power rating requied

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Sony STRD865 Home Receiver - Dolby Pro Logic - 1995 Related Models << STRD665 ($300) | STRD965 ($400) >> Here's the specs, see below but looks like 100Wx2 speakers at 8ohms. Features: A/V remote; Digital Signal Processing w/ 6 soundfields (Dolby Surround, Hall, Theater, Stadium, Game, Acoustic), Soundfield link; 30 presets; 4 audio/ 4 video inputs (1 tape monitor); sleep timer Specs: Stereo: 100w x2 into 8 ohms (20-20k Hz) at 0.3% THD; Pro Logic: 100w x3; Surround: 25w x2; subwoofer preout; FM sens. 11.2 dBf; 17" W x 5 3/4" H x 14 1/2" D Hope this helps!

Posted on Sep 14, 2007

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Cant get it out of protect mode i ve dissconnected everything. tried holding power button in . with no luck any suggestions? jeffree3@hotmail.com


Maybe if you resolve the reason it's self-protecting...

Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Apr 03, 2011 | Sony STR-D865

2 Answers

Power out rms- 4 o 8 homs?


I can see why you're asking for help on this. It almost seem this unit has been 'disappeared' as far as online information is concerned. Even Sony has nothing on it.

I founs some articles and For Sale posts:

http://toronto.kijiji.ca/c-buy-and-sell-electronics-Sony-STR-4800SD-Stereo-Receiver-135-OBO-W0QQAdIdZ243602516
"Sony's STR-4800SD receiver was extensively, and positively, reviewed in Stereo magazine's Fall '77 issue. In their introduction, they found the 4800SD bettered its published f.m. sensitivity specs "by a wide margin...it has exceptionally smooth frequency response, very low distortion(especially in the midband), and excellent quieting. No exotic claims are made for the power amp section, either (35 watts/channel,15.4 dBw at 0.2% THD). But our tests indicate much more capability than that, and a distortion of only one-tenth that spec."

The power consumption figure shown in a photo below says "145W", which would be consistent with a 35 watt amplifier.

http://www.oaktreevintage.com/web_photos/Stereo_Receivers/Sony_STR-4800SD_Stereo_Reciever_collage.jpg

Jan 02, 2011 | Sony str-4800sd stereo receiver with...

1 Answer

Sound quit and display shows PROTECTOR Sony STR-D865


This is a common question on this site. Amps of all types have protection circuits to keep them from doing a self meltdown. Testing follows this logic.
1. Remove all speaker wires. 2. Keep the volume down - all the way. 3. Turn the unit on. 4. If it does not trip off, then there is a problem either in a speaker or the wiring. a. Reconnect one at a time until/unless it trips off b. That will tell you where to look further.
If it does trip off, then there is an internal circuit issue in the amp and probably requires professional help to fix.

Nov 09, 2010 | Sony STR-D865

1 Answer

When i turn up volume on receiver it display protected and then i loose sound on my sony str-d865 receiver


That's a protection circuit in the output of the speakers. It indicates a short, or abnormally low resistance of the speaker itself. Disconnect the speaker wires from the unit, and see if the message goes away. If it did, you have a problem with your wiring, or the speaker itself.

Mar 13, 2010 | Sony Audio Players & Recorders

1 Answer

I turn it on and it says protect and wont play.


That model of receiver goes into protect mode when there is really
low
resistance or a short on your speakers/wires. It does it to protect the
final drivers in your amp. Does it do the same thing with all of your
speakers disconnected? If it doesn't then you might have a problem with
one of your speakers or wires. Check your wires for shorts in them
first. That may be the only problem. That model is designed for 8 ohm
speakers, but you can go down two 6 ohms safely. I have a STR -D865 that

has been running 6 ohm speakers safely for almost 3 years now. A way to
check your speakers out is to take an ohm-meter across the terminals on
them(with the receiver unhooked). They should read anywhere between 8
and 4 ohms. Check with the manual on your speakers to see if they
correspond. If the resistance is really low, you may have a short in
that speaker. it is also possible that if they are 4 ohm speakers, you
could have damaged the drivers in your receiver. I know the model above
mine, (the 965) has a 4-8 ohm speaker selection switch on the back. The
lower models were not designed to run 4 ohm speakers. Hopefully this has

been of some help.

Brad

Jul 18, 2009 | Sony STR-D565 Receiver

1 Answer

No audio through speakers and no light on volume dial of Sony STR-D865


unplug it back in went into safe mode it sounds like gotta watch those kids lol unplug from wall 10 min try pluging back in ok if not blow fuse inside

Jan 24, 2008 | Sony STR-D865

1 Answer

No output on main speakers


I have experienced a similar problem with my Sony STR-GX57ES and took it to a certified tech only to find it needed the power supply replaced. I opted to hunt down a compatible power supply but have been unsucessful thus far. That being said I picked up an STR-D665 for next to nothing and found the power supplies to be quite different (you would hope so any, with the ES meaning Elivated Standard and all) but with the D665 working flawlessly I'd rather have something working than nothing. Good luck!

Dec 06, 2006 | Sony STR-D665 Receiver

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