Psst... Ready to join TalkBass and start posting, make new friends, sell your gear, and more?  Register your free account in 30 seconds.

PLX3402 and DB680 question?

Discussion in 'Amps and Cabs [BG]' started by djshawn47, Feb 5, 2004.


  1. I read in another post that the PLX amps may have a hard time driving being driven to full power by a preamp. Will the Aguilar DB680 drive the PLX 3402 to full power?

    Your help is appreciated.
     
  2. inazone

    inazone

    Apr 20, 2003
    Colorado
    I have the same set up, 680/plx 3402, and dont know the answer but I also have the eden pre and people say it will drive the plx. I cant tell a difference in volume between the two. Dont know if that helps or not.
     
  3. Well, The DB680's manual says its output impedance is: Normal output=1K ohm., and Balanced output=600 ohm. I dont know what the PLXs input impedance is nor do i know hardly anything about all these number, but does anyone know if this preamp can drive the PLX 3402 to full power. Bob(QSC) if you are out there, help??????
     
  4. Bob Lee (QSC)

    Bob Lee (QSC) In case you missed it, I work for QSC Audio! Gold Supporting Member Commercial User

    Jul 3, 2001
    Costa Mesa, Calif.
    Technical Communications Developer, QSC Audio
    The PLX input impedance is 12K balanced and 6K unbalanced, so that's not a big deal. The main issue is what is the DB680's maximum output level?
     
  5. OK, the specs that I recived from Aguilar are that the Max output is +17 Dbm and Nominal output is -3.9 Dbm. Can you tell from these numbers if this preamp can push the PLX3402 to max power?

    Thanks again.
     
  6. Bob Lee (QSC)

    Bob Lee (QSC) In case you missed it, I work for QSC Audio! Gold Supporting Member Commercial User

    Jul 3, 2001
    Costa Mesa, Calif.
    Technical Communications Developer, QSC Audio
    +17 dBm = 5.5 volts RMS into a 600-ohm load, so into a 12K load it should be somewhat higher.

    The PLX 3402's input sensitivity at full gain is 1.9 volts RMS (with an 8-ohm load on each channel) or 1.7 volts RMS (4 ohms).

    So yes, the combination should work and allow you to make full use of the amp's power capabilities.
     
  7. Bob,

    I sincerely appreciate your help. Thank you.