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1.  Make sure the subwoofer is turned off (the Power Switch is in the OFF position and the Power Cable 

is removed from the wall outlet).

2.  Make sure that your audio equipment (amplifier/preamplifier/AV receiver) is turned off.

3.  Turn the Volume Regulator to MIN (max counter clockwise).

4.  Choose one of the following connection methods: 

Hooking Up The Subwoofer

AV receiver, 

Amplifier etc.

(LFE) SUB OUT

single RCA output

AV receiver, 

Amplifier etc. 

L/R RCA outputs

AV receiver, Amplifier etc. 

Speaker outputs

Check „Kit Content” for a list of cables supplied with this product.

Before connecting make sure that your subwoofer and audio equipment are 

turned off - otherwise you may damage this subwoofer and/or audio equipment. 

This may void your warranty.

Speaker cables

Y-type subwoofer 

interconnect

RCA-RCA 

interconnect 

Y-type subwoofer 

interconnect

RCA-RCA subwoofer 

interconnect

Before using the subwoofer for the first time!

Your subwoofer will typically be set at the factory to accommodate the electrical 

outlet voltage in your area.

However before using this subwoofer for the first time we recommend to verify 

that the AC Select Switch is set in the position which is compatible with electric 

power voltage in your area.

The AC Select Switch is placed behind a seal and indicates the factory setting 

for the voltage - there are 2 positions available 115V [used for 115-120V range 

voltage] and 230V [used for 220-240V range voltage].

If the voltage indicated is incorrect, follow the below steps.

In the case that you do need to change the voltage:

1. Make sure that the Power Cable is disconnected from the subwoofer.

2. Remove the factory applied seal which protects the AC Select Switch. 

3. Set the voltage to the 115V or 230V setting as required for your area.

Summary of Contents for Thunder SW-15D

Page 1: ...Active Subwoofers Thunder SW 15D Thunder SW 12D Instruction Manual Edition 09 2023 ...

Page 2: ...xtremely high volume levels The bass driver may operate in high amplitude ranges and quickly reacts on any changes in the audio signal structure The removable IEC power cable gives an option to upgrade your subwoofer with a premium audiophile power cable in any time The Thunder subwoofer delivers the most powerful deep bass with staggering definition location and dynamics never met at this price l...

Page 3: ...3 Contents Introduction 2 Safety Instructions 4 Unpacking the Subwoofer 6 Placement 6 Controls and Connections Rear Panel 7 Hooking Up The Subwoofer 8 Operation 11 Additional Information 13 ...

Page 4: ... POWER CORD CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE THE FUSE IF THE UNIT IS EQUIPPED WITH A USER REPLACEABLE FUSE ONLY WITH THE SAME AMPERAGE AND VOLTAGE TYPE IN CASE WHEN THE UNIT IS NOT EQUIPPED WITH A USER REPLACEABLE FUSE REFER REPLACEMENT TO QUALIFIED SERVICE PERSONNEL WARNING THE UNIT MAY BECOME HOT ALWAYS PROVIDE ADEQUATE VENTILATION TO ALLOW FOR COOLING DO NOT PLACE T...

Page 5: ...ce receptacles and the point where they exit from the product 12 Lighting For added protection for this product during a lighting storm or when it is left unattended and unused for long periods of time unplug it from the wall outlet and disconnect the antenna or system cables This will prevent damage to the product due to lighting and power line surges 13 Overloading Do not overload wall outlets e...

Page 6: ...ot so critical as for speakers but there are general guidelines as shown below Placing the subwoofer in the center of the room usually gives less bass but with better precision and definition Placing the subwoofer near the walls usually gives more bass with quite good preci sion and definition Placing the subwoofer in the corners usually gives much amount of bass but with less precision and defini...

Page 7: ... High Input Speaker Connectors Left and Right 11 AC Select Switch 1 3 4 6 2 5 A blown fuse should be only exchanged for exactly the same type as originally used in this product 5 20 T8A 250V The Power Cable should be disconnected 8 7 9 10 11 Check Hooking Up The Subwoofer for more details Available controls and inputs as well as their placement on the rear panel may vary depending on the model The...

Page 8: ...interconnect RCA RCA interconnect Y type subwoofer interconnect RCA RCA subwoofer interconnect Before using the subwoofer for the first time Your subwoofer will typically be set at the factory to accommodate the electrical outlet voltage in your area However before using this subwoofer for the first time we recommend to verify that the AC Select Switch is set in the position which is compatible wi...

Page 9: ...t and the 1xRCA plug to the Left or Right Low Input on the rear panel III CONNECT USING SPEAKER OUTPUTS You can use regular speaker cables to connect the subwoofer with your audio equipment this process is the same as connecting stereo speakers Using the speaker cables connect speaker output connectors located on your audio equipment to the High Input Speaker Connectors Left and Right on the rear ...

Page 10: ...terconnect not supplied L R L R RCA outputs RCA RCA interconnect not supplied or Y type subwoofer interconnect not supplied HIGH INPUT SPEAKERS OUTPUT Speaker cables not supplied connection shown for 1 channel Bare wire Terminated with banana plugs External audio equipment connection options The sockets shown for external equipment and connection options may differ depending on the device 10 ...

Page 11: ...e the subwoofer This may void your warranty Operation Mode Switch The subwoofer is equipped with the auto audio signal detection feature When the subwoofer is turned on choose one of the three operating modes ON when the Power Switch is in the ON position the subwoofer will remain continuously turned on Auto Power when the Power Switch is in the ON position If no input audio signal is detected for...

Page 12: ...ossover Regulator until the frequency range of the subwoofer blends well with that of the front speakers and the rest of the system Setting the crossover at the too low level will create a gap between the frequency of the front speakers and the subwoofer Setting the crossover frequency too high will cause that certain frequencies will be duplicated or offset Using the CROSSOVER regulator at high v...

Page 13: ...en ON again in quick succession Follow this procedure each time you turn your subwoofer OFF ON This precaution will minimize the stress high voltages on internal components It is recommended to turn off the subwoofer when you intend not to use it for a longer period of time Noise floor It is a normal phenomenon that a built in amplifier may produce some amount of noise called noise floor or self n...

Page 14: ... to the appropriate collection point for the recycling of electrical and electronic equipment By ensuring that this product is disposed of correctly you will help to prevent potential negative consequences for the environment and human health which could be caused by inappropriate waste handling of this product The recycling of materials will help to conserve natural resources For more detailed in...

Page 15: ...Notes ...

Page 16: ...Notes ...

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