SEEBURG acoustic line K-Sub-1801-dp Bass Extension User Manual
- June 12, 2024
- SEEBURG acoustic line
Table of Contents
SEEBURG acoustic line K-Sub-1801-dp Bass Extension User Manual
2. Foreword
The K Sub 1801 dp is a multi-functional premium class subwoofer with an integrated digital ampli-fier providing 2400 Watt power @ 4 Ohm (AES) and a DSP controller. The 18” long-excursion neo-dymium driver is powered by the integrated amplifier. An additional subwoofer (e.g. K Sub 1801) can be connected to the SpeakOn parallel LS out connector. Various pre-configured presets and level settings are available for selection.
The integrated DSP controller is based on the same operating principle as the stand-alone control-lers HDLM 8 and DSP 2.6. A mere 0.8 ms latency (from analogue input to output) is achieved through the use of a 96 kHz sample rate. The excellent signal to noise ratio is a further feature of the DSP controller. Electronic simulation of a transformer balanced input provides additional pro-tection against hum and buzz caused for example by external interference. High grade electronic components from the industrial sector and first-class circuit design result in a robust device with excellent audio characteristics and minimize disruptive noise.
The default state of the integrated DSP controller is the standard configuration as described in this manual. Custom presets can be installed by the user, but must be programmed with the LPI (Loud-speaker Programming Interface) by the manufacturer. The preset file is a custom audio file which is simply played into the audio input of the controller. In this manner, individual configurations can be created, for instance to accommodate the specific requirements of an installation project. Further-more, should you ever be unsure as to the integrity of the DSP configuration of your controller, you can obtain a fresh default file from SEEBURG acoustic line and re-install the original factory pre-sets yourself. Efficient and intelligent limiter functions provide optimal protection without sacrificing any of the potential of the system.
If you would like further information about SEEBURG acoustic line products, or
have any com-ments or suggestions regarding this handbook or the product, you
can contact us here:
SEEBURG acoustic line Produktions- und Vertriebsgesellschaft mbH Auweg 32
89231 Senden 07307 / 9700 – 0
www.seeburg.com
3. Safety instructions
If the loudspeaker is connected to a power source in which the volt-age is too high, a protective mechanism is triggered which reliably safeguards the amplifier module and DSP. Once triggered, the pro-tection must be renewed by a qualified service technician.
Never open the housing. There are no user serviceable parts inside. Do not expose the loudspeaker to rain, and avoid operating in envi-ronments below -5° C or above 40° C. Be aware of the possibility of condensation forming inside the housing due to rapid changes in temperature. Allow the loudspeaker to adjust to ambient temperature before operation. Leave the device switched on if operating in unfa-vorable conditions.
To prevent overheating, do not operate the loudspeaker in the direct vicinity of strong heat sources, and avoid direct sunlight. After long periods of operation, the loudspeaker, particularly metallic compo-nents such as the pole mount and the connector panel, can reach temperatures exceeding 40° C.
4. Connectors/Indicators
4.1 Connection panel
4.2 Connectors
XLR connectors (1)
The K Sub 1801 dp should be connected with a standard symmetrically wired XLR
cable. To con-nect the input signal to further devices, use the male XLR Loop
thru connector. To obtain full power performance from the system, the signal
source should be able to provide a minimum of 6 dBu distortion free output
voltage.
PowerCon blue (2)
Power supply input voltage 110-230 VAC. This connector provides the function
of an on-off switch. After powering on (turn the connector to the right until
it locks), the systems starts up and is ready for use after approximately 3
seconds. Avoid repeatedly switching the system on and off, particu-larly when
it is operating.
PowerCon grey (3)
110-230 VAC loop-through connector. This connector is to be used when multiple
active loud-speakers are to be provided with power from one source. Please
observe carefully the maximum power capacity of the power source.
**** The nominal power consumption of the K Sub 1801 dp under full power is 4.2 A (measured with pink noise, Crest Factor 8). Transient peaks can, however, cause much higher momentary power drain. Observe carefully the nominal power consumption when connecting the loudspeaker(s) to the power source, and observe carefully the cut-off current of the safety circuit breakers. We recommend using the loudspeaker on power circuits with circuit breakers with C characteris-tic.
Speak ON black (4)
This connector is used to connect and power a further external K Sub 1801.
ATTENTION! The total impedance of the connected passive systems must be 8 Ohm
or more! It is highly recommended to not connect more than one passive K Sub
1801 to this output.
4.3 Controls
4.4 Status indication
5. Operation
5.1 Starting up
When the system is switched on, it retains the settings from the previous
usage. This also applies to the Bank selection. The system is then in the
Status Mode. If the red Mute LED is lit as a result of the previous setting,
no signal will be passed. Pressing the Set button once will un-mute the
system. The Mute LED will go off, and signal will be passed.
5.2 Selecting a bank
The loudspeaker presets are stored in the DSP controller in up to 3 banks. To change banks, press and hold the Mode button whilst the loudspeaker is switched on.
- Press and hold the Mode button.
- Connect the power cable (PowerCon blue).
- Corresponding LEDs blink to indicate the chosen bank.
- Release the Mode button.
When the power cable is connected, the level and/or preset LED lamps blink to indicate which bank is selected. The level LED blinks to indicate the first bank, the preset LED for the second. The third bank is indicated by both LEDs blinking.
If only one bank is programmed, there is no possibility to switch the bank.
5.3 Setting level
Pressing the Mode button once selects the Level Mode, in which you can adjust the output volume in 3 dB steps. There are four settings available: +3 dB, 0 dB (standard), -3 dB and -6 dB. The setting is done by pressing the Set button. The Level LED lights to indicate which mode is activated. The four vertically aligned LEDs (lit green in this mode) indicate which setting is selected.
5.4 Recalling presets
Pressing the Mode button twice selects the Preset Mode. Three different
presets with an each switchable Cardioid Mode are available in each bank for
selection via the Set button. The four ver-tically aligned LEDs indicate the
current selection. The Cardioid Mode is activated in the preset when the
bottom of the four vertical LEDs lights up.
5.4.1 Preset Bank 1 – Default Settings
LP 100:
Preset for use with a mid-high system (e.g. TSM15 or K24). The acoustical cut-
off frequency in this preset is 100 Hz.
LP 120:
Preset for use with a smaller mid-high system (e.g. A6 or TSM12). The
acoustical cut-off frequency in this preset is 120 Hz.
LP 140:
Preset for use with a smaller mid-high system (e.g. TSNano or TSMini). The
acoustical cut-off frequency in this preset is 100 Hz.
Cardioid Mode:
The so-called backward attenuation of a subwoofer system (combina-tion of at
least 2x subwoofers) can be significantly increased with a cardioid. The
cardioid function works regardless of the choice of three possible presets.
More details in section 5.7.
5.5 Reprogramming of dp-speakers with preset audio files
By default, the built-in DSP controller is in a default configuration state that conforms to the descrip-tion in the User Manual. The installation of special presets on the DSP controller can be done by the user himself, since only a special preset audio file must be loaded. The programming of these audio files via the LPI (Loudspeaker Programming Interface) can only be done by the manufactur-er.
The preset is getting installed on the DSP by playing the preset audio file in the XLR input. This can be done in different ways (MP3 player, smart phone, PC, CD player, …). Installation via PC is done as follows:
- Use a mini-jack-XLR (stereo) cable to connect the headphone output to the XLR input of the self-powered box. Use only one of the XLR connectors.
- Mute the box by pressing the Set button in Status Mode. The Mute LED lights up. The DSP controller can only receive data in the muted state.
- Make sure your computer’s volume is set to 100%.
- Load the “.wav” file received from SEEBURG acoustic line into a music player.
- Press the play button.
- After a successful programming operation, the Mute LED turns off.
**** It is very important to ensure that the preset audio file is played in single mode. Other music files in the playlist or on the data storage medium will otherwise be played at full volume.
5.6 Locking the buttons
Press and hold the Set and Mode buttons simultaneously for more than 3 seconds to lock the controls of the system. Repeat the action to unlock the system.
5.7 Cardioid Mode
The Cardioid Mode serves to generate a cardioid response pattern for the
subwoofers. Using this mode, a significant reduction in bass energy emission
to the rear of the system can be achieved. A minimum of 2 subwoofer units is
required. Multiples of three is better. Specialised signal processing creates
controlled interference patterns between the sources, leading to the desired
cancellation to the rear.
In order for the interaction between the sources to function correctly and generate the desired car-dioid response, the subwoofer system must be set up at least 1.5 m away from any bordering sur-face such as a wall or solid stage front.
Installation using two subwoofers:
The K Sub 1801 dp that is in Cardioid Mode must be positioned such that the
front of the unit is facing the rear, whilst a second K Sub 1801 dp which is
not in Cardioid Mode faces the front as normal. The level of the rear-facing K
Sub 1801 dp must be reduced by 6 dB compared to the front-facing subwoofer if
the cardio system consists of only two subwoofers.
Note: Both subwoofers must be set to the same cut-off frequency. The cardioid preset of rear-facing subwoofer must be activated and the level has to be reduced by 6 dB.
Application example: Only the rear-facing subwoofer is operated in Cardioid Mode. This applies regardless of whether the two units are stacked on top of each other or laid side by side on the ground.
Installation using three subwoofers (recommended):
The performance of the cardioid configuration is better when 3 subwoofers are
used together. The units can be stacked on top of each other or laid side by
side on the ground. If in a stack, the low-est unit should face the rear. If
laid side by side, the middle unit faces the rear.
As in the previous example with two subwoofers, the rearwards facing subwoofer is operated in Cardioid Mode. The two forwards facing units are operated as normal without the Cardioid Mode activated (e.g. one K Sub 1801 dp with a K Sub 1801 connected to the parallel output SpeakON (4) and the Cardioid Mode not selected).All of the subwoofers in the configuration should be operating at the same level and with the same cut-off frequency to get the best result.
Note: Both subwoofers must be set to the same cut-off frequency. The cardioid preset of rear-facing subwoofer must be activated.
Application example: Only the rear-facing subwoofer is operated in Cardioid Mode. This applies regardless of whether the two units are stacked on top of each other or laid side by side on the ground.
6. Technical specifications
The technical data sheet and further information about possible applications
for the system and available accessories can be downloaded at the following
Internet address:
http://www.seeburg.net/download_getfile.php?file=downloads/06-Datenblaetter/K-Serie/K-Sub-1801-dp_Datenblatt_dt.pdf
7. Declaration of conformity
EG Declaration of conformity
This product
K Sub 1801 dp
confirms to the following EU guidelines, including any additions:
- 2006/95/EG, Low Voltage
- 2004/108/EG, Electromagnetic Compatibility
- (Locations: Appendix 1, Paragraph 1, a and b)
The following standards have been applied:
- DIN EN 60065
- DIN EN 55103-1:1996, classes E1 to E4
- DIN EN 55103-2:1996, classes E1 to E4
Declared by: Winfried Seeburg, SEEBURG acoustic line GmbH
Place and date: Senden, 01.01.2018
Legally binding sign:
The attachments constitute part of this declaration. This declaration
certifies conformity with the listed guidelines, but does not guarantee any
product characteristics. The safety precautions listed in the product
documentation must be observed.
SEEBURG acoustic line Produktions- und Vertriebsgesellschaft mbH Auweg 32
89231 Senden 07307 / 9700 – 0
All specifications are current at the time of publishing but are subject to change.
Auweg 32 D-089250 Senden-Freudenegg
Fon: +49 (0)7307 97 00- 0 Fax: +49 (0)7307 97 00- 29
www.seeburg.com
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References
- SEEBURG acoustic line | Aktuelles
- SEEBURG acoustic line | Aktuelles
- seeburg.net/download_getfile.php?file=downloads/06-Datenblaetter/K-Serie/K-Sub-
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