Component identification

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nemohm
nemohm Posts: 19
Hi,
In a crossover upgrade activity there are 2 components in parallel to each other within the woofer low pass.
The brown is 3.3u capacitor.
What is the blue component ---1.5u Motorola MKT capacitor??
Thank you,xtrq5vwnk645.jpg

Answers

  • pitdogg2
    pitdogg2 Posts: 24,556
    edited May 2023
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    The Blue is yes a capacitor. The big M is also used to indicate +/- 20 percent tolerance. In your case the first M is most likely 1.5uf and the second M with the circle could indicate the +/- 20%. In the past I ran across another letter symbol that actually meant the value was MUCH more by like ten times. It was a 5 volt supercap that kept power for months and memory for presets. This is not what you have here.

    d9ctknci9tde.png
  • nemohm
    nemohm Posts: 19
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    Thank you, very helpful!
  • nemohm
    nemohm Posts: 19
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    I believe it is MKT /mylar capacitor?
  • VR3
    VR3 Posts: 28,020
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    If they are in parallel, a single 4.7uf should do the trick
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
  • nemohm
    nemohm Posts: 19
    edited May 2023
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    They are in parallel, just wondering what could be the design function of parallel capacitors with different values, different types (the brown one looks as radial MKP).
  • Gardenstater
    Gardenstater Posts: 4,182
    edited May 2023
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    Uhh well I can't see the brown one too good to be honest ;)

    Probably the intent was to do a bypass cap setup, where they do most of the desired capacitance with a less expensive cap and add a smaller value more expensive better sounding type in parallel to that. Supposed to take on a bit of the sonic character of the more expensive one.

    MKP (metallized polypropylene) would (probably) be better than MKT (metallized polyester or mylar).
    Post edited by Gardenstater on
    George / NJ

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  • nemohm
    nemohm Posts: 19
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    I'm sceptical about bypass setup. Neither capacitor has a typical bypass value.
  • VR3
    VR3 Posts: 28,020
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    Cost saving measure

    20 cent over 10000 speakers
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
  • Gardenstater
    Gardenstater Posts: 4,182
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    nemohm wrote: »
    I'm sceptical about bypass setup. Neither capacitor has a typical bypass value.

    Right but if the brown cap is the better sounding more expensive one, then this is better than a typical bypass setup.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform