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    1. Registered
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      79 Posts
      Discussion Starter · #54 ·
      Hey do you have experience with this unit? I have been on the hunt for a new or used scope. I like the big old ones for some reason lol
      I heard that one gives good reads. I already have a multimeter so I bought a dedicated O-scope.
      AUKUYEE Updated 2.4" TFT Digital Oscilloscope Kit with Power Supply and BNC-Clip Cable Probe Q15001 (Assembled Finished Machine) AUKUYEE Updated 2.4" TFT Digital Oscilloscope Kit with Power Supply and BNC-Clip Cable Probe Q15001 (Assembled Finished Machine): Amazon.com: Industrial & Scientific

      People have compared it to much more expensive ones and they give the same result.
       
    2. Registered
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      I saw this model a while back and wondered how good it would be for the money. Not many reviews speak on setting amp gains.

      It's good to know it's a detailed unit that marks distortion clearly.

      So you just plug it into the amp?



      Yea I have one it's exactly the same just a different band. But I love it. When setting gains it tells you the frequency of the sine wave and the Volts in the bottom corners. The sine wave is very diffined so u can see when there is a hint of distortion. Clip lights on ams some times are way off. Some the clip light goes off way before a clipped signal others the clip light goes off well into clipping. I don't trust the lights. When I set my gains on my accord for the sub channel I got a crazy looking sine wave not a clipped one but it looked way off and not uniformed and I realized it was the factory head unit sending a distorted signal at 0. so I tuned it down at the sub channel at the head unit until the sine wave settled at -3. When I got mine the prices were like 150$. And since have gone down unlike everything else in the world right now. But yea they are dope.


      I heard that one gives good reads. I already have a multimeter so I bought a dedicated O-scope.
      AUKUYEE Updated 2.4" TFT Digital Oscilloscope Kit with Power Supply and BNC-Clip Cable Probe Q15001 (Assembled Finished Machine) AUKUYEE Updated 2.4" TFT Digital Oscilloscope Kit with Power Supply and BNC-Clip Cable Probe Q15001 (Assembled Finished Machine): Amazon.com: Industrial & Scientific

      People have compared it to much more expensive ones and they give the same result.

      I hab been looking at this one before the one above. Mainly due to only needing a o scope as I have testo DVM I also use for work and stuff.

      I was about to buy this one, then chickened out. Figured it was too cheap to sense light distortion or may just stop working.
       
    1. Registered
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      13 Posts
      Discussion Starter · #1 ·
      Kenwood DMX905S
      Kicker 46CXA8001

      Rather then pay a knowledgeable and experienced professional to perform a "gain tune service", I decided to do the onerous deed myself.

      I educated myself at U of YouTube. I purchased an inexpensive o-scope, made a speaker-bypass harness with compatible harnesses I bought from Metra, downloaded a 40hz-0db uncompressed test tone to a USB and to my phone (for Bluetooth), set each relevant audio setting to my desire, then got to work.

      The Kenwood permits setting distinct volume gain (in 1db increments) for each input source. The headunit max volume value is "40". When I set the USB, radio and BT input sources to 0db, the headunit clips at "32"--not bad at all. I noticed that lowing input source level by 1db increases clip threshold by two clicks of the volume knob; i.e., -1db = "34"; etc., which suggests I can set this headunit so clipping never occurs at max volume. I felt like an expert. But then...

      I performed the same procedure the following day. Now the headunit shows clipping at "25" with USB input level set to 0. I changed no other audio settings changed from before. Yet it's obvious something is now switched in such a way that clipping occurs at so comparatively low a volume. I initialized the headunit and started over--exact same result: clips at "25" instead of "32". I'm stumped.

      Anyone experienced with sort of thing, feel free to offer suggestions!
       

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