Soundcraftsmen RA7501

wingzam
wingzam Posts: 201
edited October 2008 in 2 Channel Audio
I just bought this RA7501(375watts@4ohms) from ebay for $237.The condition is worse then advertised to the point of being deceptive.Although it sounds very clean,hooked up to SDA-1B's it starts to clip at half volume and cuts out with a little more.I'm using the preamp section from a Pioneer SA-9500II with 12 gauge wires-Whats your opinion on that? Did I pay too much for this thing and what did these retail for new?Thanks guys
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  • george daniel
    george daniel Posts: 12,096
    edited October 2008
    this might help,, you may want to get another amp for you 1B's



    http://www.diyaudio.com/forums/showthread.php?postid=638331
    JC approves....he told me so. (F-1 nut)
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  • wingzam
    wingzam Posts: 201
    edited October 2008
    I previously was running the pioneer and it too was clipping at half volume.What would cause two vastly different power rated amps to clip at half volume?
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  • george daniel
    george daniel Posts: 12,096
    edited October 2008
    wingzam wrote: »
    I previously was running the pioneer and it too was clipping at half volume.What would cause two vastly different power rated amps to clip at half volume?

    Well if thats the case,it's time to stop putting power to them and start troublshooting. Can you describe your setup, and exactly what is happening when you power it with the receiver.When you say clipping,, can you describe in a little more detail?
    JC approves....he told me so. (F-1 nut)
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  • wingzam
    wingzam Posts: 201
    edited October 2008
    The receiver just cuts out at half volume/shuts off momentarily and then 2 seconds later comes back on.As long as I don't exceed that volume level it seems to be working just fine.However I am hooked up to a two prong house with three prong outlets.I have a surge strip plugged in and the receiver and amp are plugged into this.I do beleive I may have an actually three wire outlet so will open that up and see what i've got.
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  • ben62670
    ben62670 Posts: 15,969
    edited October 2008
    Check your other thread. Your Pro amp is most likely cutting out because it may not be common ground.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • wingzam
    wingzam Posts: 201
    edited October 2008
    The guy I bought this amp from on ebay said he'd hooked it up to all types of speakers and was never able to find its limlits..think he was BS'in me?
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  • wingzam
    wingzam Posts: 201
    edited October 2008
    Ben,there is 1 ohm resistance across the neg. terminals,is this low enough to be considered common ground?
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