Lyngdorf MP-40 Programmierhandbuch
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SPEAKERS AND BASS MANAGEMENT
MP-40, MP-50, MP-60
LYNGDORF MP-40, MP-50, MP-60
SPEAKERS AND BASS
MANAGEMENT GUIDE
Speakers and Bass Management guide 2
Table of Contents
Setup of Speaker and Room ............................................................................... 3
Initial Setup Considerations ................................................................................ 5
Subwoofer(s) ................................................................................................... 5
PCM 5.1 / 7.1 ................................................................................................... 5
Dolby Surround ................................................................................................ 5
Dolby Atmos / DTS:X ....................................................................................... 5
AURO .............................................................................................................. 6
Channel Specification ......................................................................................... 7
Speaker Size / Bass Cutoff Frequency ........................................................... 7
LFE (Low Frequency Effects) Sub .................................................................. 8
Gain ................................................................................................................. 8
Amplifier Delay ................................................................................................ 9
Natural roll-off .................................................................................................. 9
Bi-amping ........................................................................................................ 9
Dolby-enabled speakers ................................................................................ 10
Verify speakers ................................................................................................. 11
Adjust Sub ......................................................................................................... 11
Appendix / Assignment of speakers to bass positions ...................................... 12
Appendix / Comments on physical positioning of speakers and subwoofers ... 14
Trademarks ....................................................................................................... 16
Service Information ........................................................................................... 16
Speakers and Bass Management guide 3
Setup of Speaker and Room
The purpose of the speaker setup is to inform the decoder and bass management processing
which speakers and subwoofers are available. The functionality of the decoder is subject to change
by their creators: Dolby, DTS and Auro, whereas the bass management is a proprietary design by
Lyngdorf Audio.
Surround sound audio is comprised by dedicated audio tracks for low-level speakers (FL, C, RF,
LW, RW, LFE, LS, RS, LRS and RRS) and for a 3D experience like Dolby Atmos audio effects are
added as “objects” specified by their 3D coordinates in the room.
Lyngdorf Audio multi-channel processors (MP) are featuring 16 outputs for amplifiers and
speakers: The 12 are fixed and designated to the basic 7.1.4 channel configuration plus 4 auxiliary
outputs, which are designated to speakers and subwoofers defined in the Setup Menu.
The processors are specified having a capacity of decoding either 12 or 16 channels. A processor
with 12 channel decoding will be able to output the full 7.1.4 configuration plus 4 channels created
by the processor. These channels can be additional subwoofer channels, where the processors
bass-management is combining the bass from speaker channels (and LFE) and mixing them into a
stereo configuration. You can also activate Front Wide speakers or Top Middle speakers, and
these outputs will then hold a mix of other outputs – Left Wide being a mix of Left Front and Left
Surround, and the Left Top Middle would be a mix of the Left Top Front and Left Top Rear outputs.
A processor with 16 channel decoding would create discrete Left Wide and Left Top Middle
outputs.
Rear Panel:
Speakers and Bass Management guide 4
In the web interface the channel designation for the AUX output will be grey text
instead of white if the output is a mix of other channels.
Speakers and Bass Management guide 5
Initial Setup Considerations
In order to get the optimal surround sound performance from your processor, you should consider,
which audio format and post processing you want to perfect. In general minimum 5 low-level
speakers must be installed, before you can add high-level speakers for a 3D surround sound
experience.
Subwoofer(s)
- The bass performance is an essential part of the overall surround sound experience. Even
with very large front speakers (LF-RF) the Low Frequency Effects (LFE) audio channel and
bass-part of surround speakers will seriously stress your front speakers.
- A single subwoofer must be designated LFE. Position in the front corner is recommended.
- Using two subwoofers allows for a stereo setup for improved left to right panning. Positions
in the front corners of the room is recommended. If two subwoofers cannot be positioned
correctly for stereo, you should connect them both to the LFE output using a splitter.
- Three subwoofers will allow for having one as a dedicated LFE subwoofer and the
remaining two in the front as Sub L and Sub R supporting the speakers with good stereo
performance.
- Rear subwoofers can be added in order improve the experience in the back of a large
room. The bass from the rear surround speakers will be directed to these subwoofers,
which will improve both the left to right as well as the front to rear panning. Without a
dedicated LFE subwoofer, the LFE audio track will be spread into all front and rear
subwoofers.
PCM 5.1 / 7.1
- Include a Center Speaker in order not to require post processing for having the dialogue
from the center channel mixed into the Left/Right speakers. Post processing will result in a
reduction of the dynamics of the overall performance.
- With smaller front speakers, using two Subwoofers in a Left/Right configuration will improve
the left/right panning and the overall stereo performance.
Dolby Surround
- A combination of high-quality, low-level surround speakers is essential for a good surround
sound experience. Rather use the budget for a good basic surround sound system than
spread the budget on a 3D setup with mediocre speakers.
- No matter WHERE these speakers are positioned in the room, these speakers MUST be
specified as Center (C), Left and Right Surround (LS-RS) – and optionally Left and Right
Rear Surrounds (LRS-RRS).
Dolby Atmos / DTS:X
Speakers and Bass Management guide 6
- If you want to add TWO high-level speakers in order to improve the 3D performance, you
MUST specify these as Left and Right Top Middles (LTM-RTM). This will ensure that all the
audio designed to be over your head will be routed correctly. Position of these speakers
should be according to Dolby’s recommendations for optimal performance.
- If you want to add FOUR high-level speakers, you MUST specify these as Left and Right
Top Fronts (LTF-RTF) and Left and Right Top Rears (LTR-RTR) no matter how you
actually position these speakers in the ceiling. Position of these speakers should of course
be according to Dolby’s recommendations for having the optimal experience.
- You will not have any benefit from adding a Top Speaker (TOP aka. Voice of God), as this
speaker designation is not recognized by these decoders.
DTS:X is a format using up to 12 speakers in decoding and postprocessing.
Processors with capacity of decoding/processing up to 16 speakers will be
upgraded to handling the new format DTS:X PRO, as soon as the decoder is
received from DTS.
AURO
- In order to have the optimal performance from the Auro decoder and post processing, the
speakers should be positioned according the Auro recommendations and in this menu, they
should be designated Height Speakers and optionally as Top Speaker.
- Position of these speakers should of course be according to Auro’s recommendations for
having the optimal experience.
Speakers and Bass Management guide 7
Channel Specification
Speaker Size / Bass Cutoff Frequency
For all the speakers in the system, a size must be chosen. The speaker size informs the system
how much bass the speaker can play by selecting a cutoff frequency. Signals below this frequency
will then be redirected to another speaker or subwoofer in the system.
Available selections for speaker size are:
• None (The output is not active)
• XXL (Plays full range signal, bass cut from surround speakers as well as the LFE channel if
no subwoofer is connected)
• XL (Plays full range signal)
• L (Cutoff frequency 40Hz)
• M (Cutoff frequency 80 Hz)
• S (Cutoff frequency 100Hz)
• XS (Cutoff frequency 120Hz)
• Custom (Opens the option for user selectable cutoff frequency)
Which cutoff frequency should you choose?
When selecting a cutoff frequency for your speakers, you should select a frequency higher than the
lowest frequency your speaker is specified to play. This directs the bass from this channel to the
subwoofer or a front speaker, if this is specified as XXL)
Speakers and Bass Management guide 8
If the redirected bass will be played by a subwoofer, you should also make sure that the cutoff
frequency is lower than the highest frequency the subwoofer can play.
The system can only redirect bass to XXL speakers placed at the Left Front/Right Front, Left
Surround/Right Surround, and Left Rear Surround/Right Rear Surround positions.
In a system with subwoofers present, there will be no difference between XL and XXL, since the
redirected bass is played by the subwoofers.
In a system with an LFE sub, the LFE sub will play the LFE channel, while the XXL speakers will
play the redirected bass. (LFE is a separate channel for Low Frequency Effects)
In a system with no subwoofers at all, the XXL speakers will play the redirected bass as well as the
LFE channel.
Normally a system without any subwoofers will need to have XXL speakers to receive LFE and
redirected bass. There is, however, one exception; it is possible to make a system without
subwoofers and with all XL speakers. Since there is no redirected bass, the system can handle this
without XXL speakers, but in such a system, the LFE channel will not be played by any speakers.
LFE (Low Frequency Effects) Sub
According to the Dolby specifications, this channel should only contain audio up to 120 Hz. It is
though occasionally holding audio with much higher frequencies, why it possible to select a Low
Pass filter for this channel, if your subwoofer cannot reproduce these frequencies.
It is possible to add a cut-off for the LFE channel and you can choose to direct the higher
frequencies to the Left and Right Front speakers if they have the capacity to perform this audio as
well.
When setting up the LFE subwoofer, there is an option to select the size of the sub. This frequency
is only used to add a low pass filter to the LFE channel. If the subwoofers are not playing LFE, then
this setting has no effect. If subwoofers are playing the LFE, then the LFE channel will be low pass
filtered before being sent to the subwoofers. This setting has no influence on the redirected bass
since the filter frequency for that was selected when setting up the speakers.
Gain
For each speaker channel you can adjust the gain. This is used to roughly even out the levels of all
speakers with relation to the gain in each amplifier channel and sensitivity and distance to the
speaker. Use a sound pressure measuring application for your phone, while activating the Verify
Speakers feature. This would only be for ensuring, that all speakers are within the optimal
measurement levels, when RoomPerfect™ will perform the final calibration.
Speakers and Bass Management guide 9
Note: The menu Channel Gains will reveal the gain settings from the
RoomPerfect™ calibration, and you will be able to adjust the gain/level for each
channel related to the type of audio decoded.
Amplifier Delay
The objective with this setting is to easily adjust for differences in delays through the connected
amplifiers. This could be related to using Subwoofer(s) with digital processing, which employ an
A/D plus a subsequent D/A conversion causing a delay to the signal passing. Adding a delay to a
subwoofer output will result in the signal to all other outputs to be delayed accordingly.
Natural roll-off
When natural roll-off is used, the main speaker will receive the full range signal and will be allowed
to roll-off naturally. The bass cutoff frequency will still be used to send a copy of the lowest bass to
a subwoofer or XXL speaker.
This feature is used for speakers, which has an abrupt decline in its capacity for low frequencies,
and you need to have the cross-over frequency very close to this lowest capacity, as having the
cut-off filter on top of the abrupt natural decline would result in a poor integration with the
subwoofer. The feature should NOT be used to increase the overall bass output, as having the
same bass part played by two units simultaneously will result in serious phase problems and
deteriorate the subsequent RoomPerfect™ calibration.
Bi-amping
For the front speakers, it is possible to select an option to use bi-amping, in which the system will
route a copy of the full signal for the left and right front speakers to a pair of the AUX outputs.
This signal is an exact copy of the existing signal for the front speakers. If the front speakers have
been given a size with a cutoff frequency, that high pass filter is applied to both these outputs. This
means it is possible to use bi-amping for speakers and still have bass management redirect the
lowest bass to a subwoofer.
Speakers and Bass Management guide 10
Dolby-enabled speakers
For Dolby Atmos setups, it is possible to add Dolby-enabled speakers instead of using top
speakers mounted in the ceiling.
If you have Dolby-enabled speakers on top of your front and surround speakers, go to the settings
for these speakers and activate the Dolby-enabled speaker option, and then select the
corresponding size. The system will then find out which signal is to be routed for this speaker and
will add an output for it.
Notice that playback of Auro-3D material will not make use of Dolby-enabled
speakers.
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