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FAQ - Frequently Asked Questions


Browse among the following topics to read our answers to the most commonly asked questions.

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  1. How do I set my LT 5 Subwoofer to the correct crossover frequency?
  2. What room sizes is the LT 5 suitable for?
  3. Can the LT 5 replace a stereo system?
  4. Can I connect the LT 5 directly to a DVD player or PC?
  5. Which AV Receivers are suitable for operation on the LT 5?
  6. Can the 5.1 set LT 5 be used on a 6.1/7.1 receiver?
  7. Can the 5.1 set LT 5 be expanded to a 6.1 system?
  8. Can the 5.1 set LT 5 be expanded to a 7.1 system?
  9. Is the LT 5 also available as a set with five "short" L 520 FCR columns?
  10. How do I set up my AV Receiver correctly in relation to the LT 5?
  11. How do I set up my LT 5 subwoofer correctly: Cut-off frequency ("Frequency")?
  12. How do I set up my LT 5 subwoofer correctly: ("Phase")?
  13. How do I set up my LT 5 subwoofer correctly: Volume ("Volume")?
  14. Where is the best place to set up my LT 5?
  15. Where is the best place for me to set up my LT 5 L 520 C centre and both L 520 FR front speakers?
  16. Where is the best place to set up my LT 5 subwoofer?
  17. Where is the best place to put both my LT 5 rear speakers?
  18. Which accessories are included?
  19. Which accessories does Teufel recommend?
  20. The subwoofer won't play, what can I do?
  21. My subwoofer is humming. What can I do?
  22. Why doesn't my active subwoofer switch on or off automatically?
  1. How do I set my LT 5 Subwoofer to the correct crossover frequency?
    The crossover frequency is determined through the AV-Receiver - whose settings are dominant. If the red light of the Diode 3 is on, the subwoofer is operating in full-range. This position is the best for interplay with the AV-receiver.

    Use the included subwoofer remote control (key "Frequency") to adjust the crossover frequency (only recommended for old receivers). Here the frequency knob on the back side of the subwoofer can be enabled. When enabled, the green light will shine.
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  2. What room sizes is the LT 5 suitable for?
    We recommend the LT 5 for reproducing sound in rooms of up to 50 m². The set sounds best in these dimensions. It's important that you only take into consideration the area that is used for acoustics when calculating the number of square metres; you should deduct any areas such as dining areas.

    In particularly high rooms of 3.50 metres of more, the number of square metres should be multiplied by a factor of 1.5. That obviously decreases the possible room size.
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  3. Can the LT 5 replace a stereo system?
    Yes, definitely.

    The LT 5 is equally well suited to music reproduction and cinema sound. It can completely replace any standing stereo speakers.

    As a result of careful development of satellites in accordance with the most demanding criteria, we can guarantee stereo sound that is more than comparable with much larger standing speakers.
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  4. Can I connect the LT 5 directly to a DVD player or PC?
    No.

    The LT 5 is a partially active system that requires AV Receiver operation. It has a built-in 500 watt amplifier that only supplies bass tones in the subwoofer housing That is why an "AV Receiver", i.e. a combination of radio receiver and multichannel amplifier, is essential for using the LT 5.

    The subwoofer is connected from the Line In R input to the AV Receiver's sub out jack using a mono RCA cable, while the five satellites are connected to the five speaker outputs of the AV Receiver using the speaker cable and are supplied with power from there.

    Connect signal-emitting source appliances such as DVD player or PC etc. directly to the corresponding input jacks on the AV Receiver.
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  5. Which AV Receivers are suitable for operation on the LT 5?
    Our homepage features a number of AV Receivers recommended for use with the LT 5. When making your selection, you can also consider later models, as well as other brand models with similar technical specifications.

    Hardware recommendations
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  6. Can the 5.1 set LT 5 be used on a 6.1/7.1 receiver?
    Yes.

    The LT 5 is always shipped out in 5.1 standard configuration. As such it is also fully operational on a 6.1 or 7.1 receiver. The corresponding outputs for rear centre signals are simply not used.
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  7. Can the 5.1 set LT 5 be expanded to a 6.1 system?
    Yes.

    If you are using a 6.1 receiver, we offer the option of adding another, individually available L 520 C centre to the rear centre channel.
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  8. Can the 5.1 set LT 5 be expanded to a 7.1 system?
    Yes.

    If you want to use all channels of a 7.1 receiver, we offer LT 5 customers either two additional L 520 FR standing speakers or L 520 FCR "short" columns.

    These satellite speakers make excellent rear centre speakers. It's best to base your decision on which model could be most easily integrated into your home.
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  9. Is the LT 5 also available as a set with five "short" L 520 FCR columns?
    Unfortunately not.

    For logistical reasons, we have to limit ourselves to the most popular varieties - and experience has shown that these are formats with four or two long columns.
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  10. How do I set up my AV Receiver correctly in relation to the LT 5?
    Select the "small" or "normal" (not "large") setting in the bass management/speaker management ("Speaker Setup") of the AV Receiver for the satellites – this guarantees that the satellites can be used fully and the subwoofer and front speakers harmonise perfectly with each other.

    The subwoofer channel must be set to "On" in the bass management / speaker management ("Speaker Setup") on the receiver. The appropriate cut-off frequency for the LT 5 is 100 Hz (other values between 90 - 120 Hz are also possible).
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  11. How do I set up my LT 5 subwoofer correctly: Cut-off frequency ("Frequency")?
    The cut-off frequency is determined by the AV Receiver - its settings are dominant. Use the remote control that is included with the subwoofer ("Frequency" button). This activates the frequency control on the back of the subwoofer. Diode 3 then lights up in green. If Diode 3 lights up red, the subwoofer is in "Full range" operation.

    This position is the best solution when combined with the AV Receiver.
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  12. How do I set up my LT 5 subwoofer correctly: ("Phase")?
    Nowadays the phase is normally determined by the AV Receiver. Leave the phase on the subwoofer at 0o (= diode 2 lights up green).

    Individual setting may be necessary on older receiver models:

    Listen to a loud piece of music with a lot of bass and ask somebody to change the phase while it is playing. The correct setting of the phase switch depends on the position of the subwoofer in the room. The position where the bass reproduction can be heard fully (especially in the upper base area) is the right one. Have fun trying!

    In practice, the correct position has often been shown to be the one where the phase controller is at 0°, if the subwoofer is set up near the front speakers.
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  13. How do I set up my LT 5 subwoofer correctly: Volume ("Volume")?
    Use the remote control included.

    This sets the subwoofer’s volume. Increase the volume using the "+" button and decrease it using the "-" button. Diode 1 flashes quickly while the level is changed.

    The volume setting of the subwoofer may be slightly different when playing back music compared to playing home cinema sound, depending on the recording quality and mixing. Whereas a massive bass element predominates on DVDs with lots of special effects, the desired level is sometimes not reached for music (especially if the set has been set up for ideal DVD playback). In this case, the user's own taste is the main determining factor in finding the right compromise between the two sources. That way you can gradually find the best volume for the subwoofer.

    We do not recommend selecting an automatic setting for the subwoofer using the integrated calibration computer (if the receiver has one) but rather setting the subwoofer channel in the bass management /speaker management ("Speaker Setup") to a high value (fairly restrained on the subwoofer). Then you can determine the ideal level by carrying out listening tests.
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  14. Where is the best place to set up my LT 5?
    With a home theatre system like the LT 5, we recommend that you concentrate on the area that is actually being used, i.e. the area where the TV/screen and sofa/seats are located. Positioning the TV/screen as centrally as possible makes set-up much easier.

    The recommended set-up information below represents the best possible arrangement for perfect multichannel playback in your home. Your available space, your partner or your furniture may not always allow you to arrange the speakers in the ideal manner. Try to meet as many of the requirements as possible. Modern AV Receivers offer numerous options for compensating electronically for any compromises in the set up.

    Generally speaking, the following rule applies: you can always use our recommendations as a basis for experimenting with what works best for you, acoustically and optically. Let your ears (and eyes) decide!
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  15. Where is the best place for me to set up my LT 5 L 520 C centre and both L 520 FR front speakers?
    Because the centre plays back actors' dialogue, the speaker must be positioned as centrally as possible under or over the TV/screen and inclined or angled towards the listener.

    Using the old stereo tradition (distance to listener = distance between the left and right speaker), the front speakers are set up next to the TV with the same distance to left and right. It is best to position the standing columns as close to the wall as possible.

    If these values have to be outside of the recommended range, you can slightly tilt the front speakers up or down towards the listening area. It is important that the centre and front speakers are positioned approximately in a line or possibly even on a slight arc to the TV. Otherwise possible run-time differences can affect the homogeneity of the playback.
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  16. Where is the best place to set up my LT 5 subwoofer?
    At a cut-off frequency of 100 Hz, the subwoofer is best located within a straight line between the two front satellites, whereby sideways alignment to one of the two front speakers, rather than a central position, has often turned out to be best.

    The bass cube can be alternatively placed anywhere in the room.
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  17. Where is the best place to put both my LT 5 rear speakers?
    You have the following options for positioning the rear speakers:

    1. To the left and right sides of the listening point. The front, with the Teufel emblem, emits sound in the direction of the listener.

    2. To the left and right sides of the listening point. The front with the Teufel emblem emits sound in the direction of the TV/screen.

    3. Left and right behind the listening point – ideally mirroring the front speakers. The front with the Teufel emblem emits sound in the direction of the listener/TV.

    We recommend that the distance between the rear speakers and the listening point is greater than 1.00 m. However, if you (must) sit closer, make sure that the front of the speaker is not facing you directly, but that it faces into the room by slightly turning / angling the speaker.
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  18. Which accessories are included?
    The LT 5 is supplied without connecting cable because of diverse customer requirements.

    You can find the right accessories for it in the Teufel webshop.
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  19. Which accessories does Teufel recommend?
    We recommend using our optionally available 4 mm2 diameter speaker cable for producing optimal sound quality in the set.

    For connecting the subwoofer, Teufel's NF mono RCA cable is the best choice for interference-free bass reproduction. And using a Y adapter, you can use both line inputs on the subwoofer simultaneously, which increases the volume again.

    If you require any of these recommended accessories you can order them, in various lengths, from our accessories area.
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  20. The subwoofer won't play, what can I do?
    1. If the operation lights on the front display don't light up:
    Change the fuse next to the mains switch on the back of the appliance. If the power diodes on the front display don't light up after that, please contact our service department. If the power diodes light up afterwards, but there is no sound, please continue as described under point 2.

    2. If the lights on the front display light up:
    Use the remote control to set the level of the subwoofer to "minimum", disconnect the subwoofer RCA cable from the amplifier, carefully increase the level and touch the RCA thermistor of the RCA cable (inner) with your finger. If you can now hear buzzing or crackling, the defect is in the receiver or its settings. If the subwoofer remains silent, please contact our service department.
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  21. My subwoofer is humming. What can I do?
    This hum can be caused by the connected devices or disruptions in your electricity current. Please do a test to see which it is.

    1. Remove the RCA cable from the input on the subwoofer. If the hum is no longer heard, go to point B. Otherwise, follow point A.

    A. Attach the net cable of the subwoofer to another electricity outlet (i.e. Kitchen/Bathroom/Bedroom). If the subwoofer still hums, get in contact with our Support team.

    Should the hum no longer be there, the disruption was a problem in your power supply, which can, for instance, be caused by dimmers or chargers. To find out where the disruption is, unplug all your devices and work back from there. As soon as the hum is heard, you now know your source of the disruption.

    B. In your case, the "ground hum" is responsible for the disruption. Please proceed as follows to discover your source.

    • Disconnect the cable or satellite port from the TV Receiver and check if the hum disappears or not. If it does, you can use a sheath current filter for the cable outlet to prevent this. For example, the sheath current filter AC 9022 ED. If you have a satellite connection, connect the Satellite Receiver to the optical cable playback source - Teufel Optical Digital Cable

    • If this reason can be excluded, separate all devices from the AV Receiver one at a time until the hum stops. The last connected device is then your hum source and should be separated from the others using a galvanic separation filter (found in a retail shop)

    • If this doesn't work, get in contact with us once again so that we can give an individual, helpful response.

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  22. Why doesn't my active subwoofer switch on or off automatically?
    The "On/Standby" button on the remote control supplied allows you to determine when the woofer switches on, from the comfort of your sofa.
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