Connecting a subwoofer correctly

Discussion in 'Hi-Fi Stereo Systems & Separates' started by Aflynn, Jul 25, 2018.

  1. Aflynn

    Aflynn
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    Hi all,
    I am new to this forum.

    I have a Cambridge Audio a300, and i was debating buying a a kenwood SW-305 subwoofer off a friend for a good price.

    1. Could I simply connect the amplifier with a RCA to RCA into the line input on the sub, and leave speakers connected to the amplifier?

    2. Will there be issues with crossover and the sub gain, and is it worth it?

    Thanks in advance!
    Alex
     

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  2. Ugg10

    Ugg10
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    Yep, pre-outs on the amp to rca in on the sub woofer.

    What main speakers do you have? Look at the specs fir them and try and find the -3db lowest frequency the usual process is to set the subwoofer frequency at about the same of just slightly over e.g. if main speakers are 55hz, set the sub to 55 or 60hz. Then turn the volume of the sub is just audible then back it of a very small amount.

    You could also download one of the free spectrum analyser phone apps and try and use that to balance as well.

    Finally, if you are on Spotify there are speaker set up playlists that have sine wave tracks for discrete frequencies e.g. 30hz, 50hz etc. Use these to find out where the main speakers drop off (sub off) the use that frequency with just the sub, changing the frequency control so it just cuts in. Then balance each the volumes as above.
     
  3. Aflynn

    Aflynn
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    thanks for your quick response!

    I am using Pioneer SZ 71's at the moment, i will also take a look at the spotify speaker playlists.

    cheers,
     
  4. Ugg10

    Ugg10
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    Think if you search “test tones” you will bring up some.
     
  5. Paul7777x

    Paul7777x
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    Without wishing to be rude I’d spend any money you have on new (used) speakers (with the Pioneers being rather old and not awesome even in their day), before considering a sub. Especially something like the kenwood.

    The amp is a great one and can drive some very good speakers.

    The kenwood sub is a bit of a plastic one note affair.

    However, if you’re okay with your current speakers then the kenwood will be happily driven by the preouts from the CA.

    But I can’t really see it being much good at all.

    Please forgive me if I sound like a pretentious tw#t.
     
  6. Aflynn

    Aflynn
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    I understand completely and thanks for the advice, i think it'd probably be wiser to invest in some better quality speakers. Do you have any recommendations? Im a student so money is a little tight so i would be looking at second hand speakers.
     
  7. Paul7777x

    Paul7777x
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    Difficult to say without a budget and room size, but here’s a couple of ideas. Your amp will be happy driving any of them.

    Q Acoustics 3010 Matt Graphite Bookshelf Speakers in Immaculate Condition | eBay

    Wharfedale DIAMOND 8.1SE Bookshelf Speakers (W535) | eBay

    black 100W 2-way BOOKSHELF reflex KEF Q15 Bi-Wireable SPEAKERS | eBay

    Mission m72 shelf speakers | eBay

    Mission LX-2 (Black) Pair of Bookshelf Speakers | eBay

    Any of this little lot will easily outperform the pioneers. And I think you’ll like what the amp can do with the.

    If you’re happy to mention a budget and room size you’ll get more suggestions too.
     
  8. Aflynn

    Aflynn
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    Great cheers! Thats the sort of price bracket im saving for (under £150) for now...

    In the mean time i may be able to get my hands on some celestion 3's for free, any opinions?

    Thanks for your help
     

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