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have an h4n recorder...do i need a DI box to connect a bass? DI schematic?

Discussion in 'Pickups & Electronics [BG]' started by soma89, Feb 27, 2018.

  1. soma89


    Jan 7, 2006
    Toronto, Canada
    It sounds good without it, but was wondering if "ideally" one would use a DI box.

    Kinda looking for a good excuse to build a good DI..I love the old 60's DI bass sound ( a la Byrds, Love, etc)

    Can anyone recommend a good DI schem?

    Thanks in advance
  2. qersty


    Aug 15, 2012
    I have never used one but on their website they say it works on instrument level. So no, I dont see any benefit using a DI box here if it sounds good and I suspect you don't run any long lengths of cable
  3. From the Manual:

    "Connect mics and guitars directly using combined XLR/
    standard phone jacks.

    The H4n Pro includes input jacks for connections that can accommodate a variety
    of recording styles. Microphones, including stereo mics and condensers, electric
    guitars, basses and keyboards can all be connected directly

    And remember when a DI was used in a studio in the '60's it was routed into a mixer, a preamp, EQ, compression and tape - they all alter the sound significantly.
  4. I have an H4N too. The unbalanced input impedance is 480k (I just looked it up.) This should be fine for a typical passive bass. (If your bass is active, it should easily drive an impedance that is 1/10 of this.)

    The other reason to use a DI is for earth loop isolation, and obviously this is not an issue when plugging in directly to a portable battery operated device!

    But if you want to build a DI, here's a nice one from Electronics Australia published about 20 years ago. I'm pretty sure that fet is still available, and you'll need a good audio transformer with mu-metal shielding can. Anything from 4:1 to 16:1 is recommended in the article. I built several of these back in the day and if you spend some coin on a jensen transformer or something, it will be easily suitable for studio use.

    EA Fet DI.
    qersty likes this.

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