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HELP! SP B1 kill my pre?

Discussion in 'Recording/Live Sound' started by laiben, Jul 27, 2004.

  1. laiben

    laiben Member

    Messages:
    43
    Joined:
    Nov 21, 2002
    Hello,

    I had a ball mic and M-Audio DUO (with 2 pre built-in) for almost a year and working fine.

    Today I just got a Studio Projects B1 and plug into my DUO...
    no sound.. I unplug it, and see that both 'sig' and 'clip' led keep
    light on ( nothing is plugged!!!!). After I switch on and off my DUO, and reboot and reboot my PC it still don't work, both LED
    keep light on even there is nothing connect to that channel. I
    plug in my ball mic in that channel and still don't work. it seems
    that channel is dead.

    Then I try to plug the ball mic in another channel, it works.
    they I unplug the ball mic, and plug into the B1, and see that
    both 'sig' and 'clip' ligh up (the gain knob is set to minimum)...
    and now i have both channel die......

    Is that the B1 problem or my DUO problem??!!!

    Pls help!!

    laiben
     
  2. laiben

    laiben Member

    Messages:
    43
    Joined:
    Nov 21, 2002
    And I connect and disconnect the B1 while the phantom power
    is ON... is that the problem??!
     
  3. oldgtarz

    oldgtarz Member

    Messages:
    440
    Joined:
    Feb 12, 2003
    Location:
    netherlands
    Pluggin in while phantom powered is supposed to be killer for your condenser mic... When I plug or unplug a mic in my mindprint envoice I always switch the power off.
     
  4. laiben

    laiben Member

    Messages:
    43
    Joined:
    Nov 21, 2002
    Thanks..

    Will the phantom power damage the mic or the pre (or both?) if I connect them while the phantom power is on?
     
  5. MichaelK

    MichaelK Member

    Messages:
    6,479
    Joined:
    Jan 7, 2002
    Location:
    Fort Mudge
    It's like asking, "If my car hits a cow without me wearing a seatbelt, will all three be damaged?"

    All due respect, all I can answer is, "I dunno - will they?"

    Sorry - maybe someone else can be more helpful.
     
  6. loudboy

    loudboy Member

    Messages:
    27,399
    Joined:
    Nov 3, 2003
    Location:
    Sedona, AZ
    I don't practice it, but leaving phantom on whilst unplugging a mic should cause no damage. I've done it inadvertently a ton of times when other engineers leave it on and I'm setting up for a session, no problems so far...

    Fletcher (who should know) says that a lot of the classic old consoles were wired w/phantom permanently on.

    Loudboy
     
  7. Bassomatic

    Bassomatic Silver Supporting Member

    Messages:
    12,351
    Joined:
    Nov 3, 2003
    Location:
    western ma
    +1.

    (However, this is NOT the case for ribbon mics, where you'll fry 'em with such treatment).
     
  8. MichaelK

    MichaelK Member

    Messages:
    6,479
    Joined:
    Jan 7, 2002
    Location:
    Fort Mudge
    My understanding is that it depends on the mics, that older condensers were more succeptible to damage, either from power supplies or phantom power. I make a point of making sure it's off when I'm connecting and disconnecting, but it's happened on a couple of gigs with no damage done.

    Am I right that phantom power is a fairly recent thing, like in the last 30 years?
     
  9. laiben

    laiben Member

    Messages:
    43
    Joined:
    Nov 21, 2002
    Guys,

    I could certified that my DUO is dead.
    I email SP and they said it is impossible for the B1 to damage the
    pre. However from what I observed was that right after I plugged in the B1 the pre died.... I have no idea the fault is on the B1 or the DUO. The DUO is my only pre and now I have no way to verify
    if the B1 is faulty or not.. and I have no friend do recording so I
    couldn't borrow a pre to test.. even I can borrow a pre the B1 may
    burn their units.. (i dunno!). In conclusion, it sucks!

    BTW when the DUO was functioning I don't think the pre is good,
    not enough headroom.

    Maybe it's time to buy another soundcard.... $$$$

    laiben
     

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