Ceiling Speakers

[Speaker No.1488446]

Bros...I recently hooked up two 8" ceiling speakers to an old receiver as shown in the diagram. I might have blown the receiver. Original plan was to hook up three speakers. But I stopped when I smelled burn and some smoke. Could anyone tell me what's the best way to go?

Speakers are 8 ohm each.

The new receiver is Sony 7.2 STR-DH790

Output Channel Qty
7
Amplifier Output Details
Output Power / Channel
145 Watt
Output Impedance / Channel
6 Ohm
Frequency Response
at 1 kHz
Total Harmonic Distortion (THD)
0.9 %
Channel Qty
1

[Speaker No.1488450]

Also, what i'm trying to achieve is not a multi-zone setup. I just want all 3 speakers to play the same. Also, no sub-woofer.

[Anonymous No.1488457]

>>1488446
That's a 4 Ohm load (assuming you put two 8 ohm speakers in parallel)
Need to know what the impedance of your speakers is. Usually two in parallel is ok.
read up on that stuff here.
https://geoffthegreygeek.com/
Just one of many audio sites out there.

[Speaker No.1488463]

>>1488457
Here's the back side of the speakers while I read up on your link.

[Anonymous No.1488478]

>>1488446
You have those wired as a 4 ohm circuit and you're connecting them to an amplifier that is rated between 6 and 16 ohms. Not going to be good for the amp.

If you're going to run three of those 8 ohm speakers, wiring them all in parallel makes the ohms too low (2.7 ohms) and wiring them all in series makes the ohms too high (24 ohms).

The receiver has two sets of stereo outputs (labelled "front A" and "front B") that can be run at the same time. Connect each of the three speakers to one of those stereo outputs individually.

You could do some weird shit like wire 2 in parallel and 1 in series on the same circuit, but there's no point when the amp has enough channels to run each individually.

[Anonymous No.1488482]

>>1488463
Ah.. Those are for 70V audio systems in large buildings. take the white wires off the transformer and use those for your audio. Or desolder the tabs and use some push on connectors. You don't need that transformer at all.

Big tab is positive, small tab is negative (or ground).

[Anonymous No.1488486]

>>1488478
tl;dr - connect the speakers individually to front left, front right, and one of the rear surround outputs, then switch the sound mode to multi-channel stereo.

[Anonymous No.1488487]

>>1488482
I wonder if it runs the same resistance without the transformer

[Anonymous No.1488493]

>>1488487
The speaker is 8 Ohm.
Note the 8 Ohm designation on the white (secondary) side of that transformer.

You do not want to just tap that side and leave the transformer connected. That will show up as a 4 ohm load and have some really freaky audio properties.

70Volt systems are a whole different thing.
http://www.alectrosystems.com/audio/Distribution/70volt.htm
They are nice for large installs (whole house), but require special distribution equipment.

[Anonymous No.1488494]

>>1488487
No u need to match and carry it or it won't work well.

[Speaker No.1488498]

>>1488486
>>1488478
Thank you very much guys. Your instructions can't be clearer. Much appreciated!

[Speaker No.1488514]

>>1488498
Just to be clear, here's what I'm connecting right?

[Anonymous No.1488524]

>>1488514
The left and right sides will work. Though you might want to see if that can be set to Mono rather than Stereo. Otherwise you will get half the music in one room and half in the other.

Not sure about the surround.
Might want to hold off on that till you figure out how to make all the speakers have the same output.

The system I have is an old one.. Kenwood KR-V9010
(crappy pic from internet)
It has four channels plus a buttload of totally useless inputs now. S video, RGB,