Sonance Sonamp 260 MKII 2-Channel Amplifier - Answered Questions & Fixed issues

Don't know if you still this, but I uploaded it to this post in .PDF format. Hope it helps...

follow the wiring.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/search?q=Sonance+Sonamp+260

It's not bridgeable according to the manual.

Who specs an amp at 3 ohms anyway? Your Carver might be just as effectively powerful.

Check fuser, power supply filters, and all electrolytic capacitors, look at the top of these caps for swelling check for dry solder on the circuit boards, check output transistors and scorched resistors

connect the two wires to the woofer

Generally speaking, an amp attempts to protect 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.

Check for loose speaker connections at the speaker as a possible root cause for intermittent shutdown.

There are numerous locations that should be able to repair your unit. Can you please indicate your location so we can provide a local recommendation?

Thanks,
Dan

I reckon the line out is for connecting the pre-amp section to a powered amp. Which is why you are hearing the weak signal. In which case it's clear to me that for some reason the power amp section in your Sonance is dead! Since it's a stereo amp it's something that has killed both channels. Like a power-amp IC such as the picture I'm posting below. Or something else that is accross both channels, but not the pre-amp section.

The red light will stay on without speakers connected.

Make sure your speakers are good and try again

If it still fails then there's a power supply failure internally

Try using your headphone, if the sound comes out, then the problem came from power output

I am assuming you are using the standard sonamp 260 not a 260x3
and that when you say you are getting sound on only 1 pair that means only on 1 side (left or right channel only?)

Are using a speaker selector box? you must to regulate the resistance (ohms)

if so first unhook all but on pair of speakers and see if both channels are working.

if they do your problem is in the speaker selector not the amp if no then check to see what the amp level is set to. These are the two small holes on the front right of amp make sure they are set about equal at around half way up.

If that doesn't work flip the RCA cables coming to the amp perhaps you have a bad cable if that doesn't work make sure your receiver (source) is outputing a stereo signal to begin with.

lastly 8 sets of speakers off 1 amp? that's pushing it.even with a high quality Niles or speakercraft selector that controls the resistance going to an amp I wouldn't go past 5 sets.

The right way to do it would be to use 260x3 or a sonance or speakercraft 12 channel amp.

When an eletronic devices shuts down, it is usually caused by an overload in the circuit. You can try connecting a different speaker to it to see if does the same thing. If that do not work it is needs repair.

Here you go bro:
http://docs.google.com/gview?a=v&q=cache:6hHh18UZsloJ:www.sonance.com/files/downloads/file/Cinema260AmpManual_Revised.pdf+Sonance+Sonamp+260+pdf+manual&hl=en&gl=us&pid=bl&srcid=ADGEESjDo20tG_6vpCpSsnzX7v0dH6vTAvGsy4cMblzyYH0iaIJpAyt0OVecrJRaDVNsFIvVF9aI0ZdN69nP6nXyQ-N6KQtdBNrtL-j6bD8yzupS9iTVdcKzCraFnavgFGNXF8SjPrXb&sig=AFQjCNFtaCgbZFC-dhO6QHrqGZf3BoqfGQ

Normally this denotes a protect condition. Remove the speaker wires from the back of the amp and see if the green light stays on. If this fixes the problem, then there is a short circuit in your wires, speaker level volume control or speakers. The amp sees the short and goes into protect. After a couple seconds it closes the connection again and if the short is still present it goes back into protect.

1. Check that the trimpots on the front panel are all the way up.
2. The speaker relay on the Amp PCB may be bad. Over time the fingers can warp and won't make contact any longer.

Hi Rommel_fix

Do you want to use a mixer for a preamp? This will work fine. Is this what you are doing?

regards
Graeme

Tape out from dennon to tape in on sonamp then select source from dennon.
GOD LUCK
BIGRED

The fuses are there to protect the internals of the AMP.....
Please check that the correct fuses are installed......
if the incorrect ones are installed then a fire may develope...

There should be a manufacturers lable on the external chassis that details the fuses to use....

Fuses now days can be slow blow or fast blow....so the correct fuses must be used.....dont increase the fuse rating past the chassis panel label...but make sure they are correct...if they are correct then the amp needs a service to determine where the peak loadings to the power supply are originating from...

Some one may have installed incorrect fuses in the past...

Cheers from YUBEUT

The answer depends on if you have external speaker level volume controls (usually in-wall type) between the amp and the speakers. If yes, hook the RCA cables from the 275 inputs to the Denon's Tape Output. With speaker level volume controls set to max, use the level controls on the front of the 275 to set max level desired in each room. If no, then you must use a line level volume control between the Tape Output and the 275.

There are many replacement speakers available from "MCM Electronics" - check out their website and you'll be amazed. They ship quickly too.