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Owner's Manual DT 110 MK II

Line In:
These RCA jacks are for your low level signal input, such as a preamp or Pro-logic decoder. You can use this input as well with your integrated amp or receiver if there is a preamp-output (Pre out). If there is no such output you can still use the "Rec out"-jacks. Please switch your amp to "Tape monitor"

Line Out:
Low level output to connect to your power amp. This output uses a 12 dB high pass filter to block low frequencies from your satellites. If there is an integrated amp or receiver which cannot be split you can use the "Play in"-jacks. You will have to switch your amp to "Tape Monitor" in this case.

Hi Level In:
High Level inputs to connect your power amplifier speaker terminals to. Normally this input will be used to connect your subwoofermodule to and not the "Line in"-input, because like this the sound characteristic of your power amp will be integrated in the resultant sound making it more homogenious.

Hi Level Out:
High level signal outputs to connect to your satellites. This output uses a 6 dB passive high pass filter to block low frequencies from your speakers. As this filter is passive the final turnover frequency will depend on the connected speakers.

Alternatively you can connect your satellites directly to your power amp without using the fitered outputs of the subwoofer module. They will be in parallel with the subwoofer then running full range. Try for yourself. The proof is in the listening.

Power:

  • Off: Turns module off.  
      N.B.: Even in the Off-position the module is still connected to the mains.
      Please unplug the module from the mains socket before working on it!
  • Auto: Turns module to stand-by. The module will switch-on automatically when there is a signal at the inputs. After about 15-20 minutes without a signal the module will turn-off.
  • On: Turns module on.

    Bass-Boost:
    boosts the bass level at 30 Hz for the chosen amount.

    Crossover By-pass:
    by-passes the built-in low-pass filter in case the modul is connected to the subwoofer-output of a surround decoder. The module is then working like a normal power amplifier.

    Crossover Frequency:
    Controls the low frequencies to the subwoofer.

    Volume:
    Controls the sub's loudness.

    Phase:
    With this control you can vary the phase of your subwoofer module's low pass output signal smoothly. This might be necessary to fight strong standing waves or other interference within you listening room.

    Output:
    The subwoofer amp's output is available at the red (+) and black (-) wires on the PCB-side.

    How to integrate your subwoofer into your listening room:
    Now you know how to make the different connections to your subwoofer. In the following passage we will describe how to integrate your subwoofer sonically into your listening room.

    All we need to do this is a bit of time, a well known CD or LP, preferrably a second person to help and some patience.

    To position the subwoofer in your listening room the same rules apply as with every loudspeaker: the more boundaries it "sees" the more bass you will have. I.e. it will play loudest in a corner, a bit less in front of a wall and still less in the middle of a room. It has shown that a position near a wall in between the satellites will give best results. You do not have to place it exactly in the middle though. (The ones among you listening mostly to classic music may keep in mind that the basses in an orchestra are placed on the right hand site.)

    Important:
    All adjustments to make in the following are only valable for this now chosen position of the subwoofer. Changing the position of the subwoofer will result in an new adjustment!

    Still more important:
    All adjustments are to be found while the satellits are playing. There is no use in playing the subwoofers alone. You will end up with all the wrong adjustments in the end. Integration of all parts is the keyword here.

    1) Put both the volume control as well as the crossover frequency to a midway position. Now find the position of the phase control at which the bass seems louder.

    2) Now turn the volume to zero and slowly turning it up again find the points where the subwoofer becomes audible. Turn it lower now to the point where you cannot hear it once more.

    3) Turn the crossover frequency to maximum now and slowly reducing it until the bass does not sound whooly and soft anymore.

    4) Just now it might be necessary to readjust the volume once more and you should check whether the phase control is still in the position that gives you the most bass-volume.

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