Had my Creek since 1984 - absolutely brilliant !! However, I think something has gone phut and blown my Mission 70S's.
When the speakers load after power up, they rustle badly and hiss like excessive static, then they don't play anything.
Just bought some new speakers (AE Evo1 Aegis) and have tried connecting them to the Creek, they rustle very slightly but hiss over the music. Need to fix this before driving them for real.
Any ideas would be much appreciated - the amp is too good to give up on.
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You either have a blown speaker or the amplifier in the radio has gone bad. Sometimes a blown speaker will act as an additional ground thus grounding out the radios internal amp. Check your speaker by hooking them to an external audio source. If you do have a blown speaker once it is removed all working speakers should play. Speakers should be replaced in pairs. If they all work its the radio itself. It will need to be replaced.
It seems that you have a low Hz feedback loop between the speakers and the tonearm/stylus.
Usually it's only a visual effect and very little can be heard.
In the old times there was a "subsonic" filter in the phonostage part of the amps to cut this out.
You could try a different placement of the turntable as this phenomenon is induced by airborne vibrations and a different placement could ameliorate this interaction...
1. short circuit/crossed speaker wires- examine the speaker cables very carefully, paying particular attention to loose strands at the ends that may be crossing.
2. blown speaker/fried vioce coil- push in on the speaker and it should push down about an inch with no resistance befopre bottoming out. if there is resistance, and/or it feels scratchy/rubbing when pushing in then the speaker is blown.
protect mode usaully means that something has disrupted the power of feed lines to the subwoofer/speakers possibly fuse is blown in amp or amp is blown in which we hope not. see if you have a warrenty if blown and send back or bring it to where you purchased it from.
Those black things are likely the MOSFET transistors (the bits that provide the amplification). They likely look similar to these.
Your problem may be deeper than just these units being blown - especially since there are 6 that are gone. Have you been overdriving the amp? Using speakers with the wrong impedence?
Anyway, you can try www.user-manuals.com to see if they have the service manual. You could also try to source new mosfets from online retailers (eg digikey, www.sayal.com) - just read the numbers printed on them. You may also want to try to determine why they blew in the first place. I have fixed amps where one or two have gone bad because of being overdriven, but 6 makes me think that something else is wrong. Unless the am has a number of MOSFETs serving each channel. Eg, 3 MOSFETS per channel on a 2 channel amp..
Are you saying its taking a long time for the sound to come out of the speakers?? or that theres no sound at all?? If its taking a long time check the resistance of each speaker to see that a componet in the crossover or the speaker didnt short.If you take all the speakers and if theres supost to be a relay for protection and you hear it click then the amp is good or has an out put stage problem like bad poutput devices or blown driver transistors. Need alittle more info if you could Thanks.