Silverhammer 4 - Car stereo Auna - Free user manual and instructions

Product type	4-channel audio amplifier for car radio
Brand	Auna
Model	Silverhammer 4
Article numbers	10006684, 10006685, 10006686, 10006687, 10006688, 10006689
Power supply	12 V DC
Dimensions (W x H x D)	45 x 5.5 x 25 cm
Speaker impedance	2 to 16 ohms (stereo)
Recommended fuse	7.5 A
Bass Boost adjustment	Amplifies frequencies around 50 Hz up to 12 dB
Treble Boost adjustment	Amplifies frequencies around 10 kHz up to 12 dB
Volume control (Gain)	Input gain adjustment
High-pass / Low-pass filter	Adjustable frequency from 50 to 250 Hz
Audio inputs	Line input (speaker connectors)
Protections	Overheat, overvoltage, short circuit (red indicator)
Mounting	Trunk or under seat, cooling fins unobstructed
Cleaning	Dry cloth (microfiber), no detergents
Operating temperature	Avoid direct sunlight and high temperatures
Connections	+12 V, GND, REMOTE, speaker inputs
Recommended wire gauge	AWG-10 or 5 mm diameter for +12 V and GND
Compatibility	Passive speakers (do not connect active speakers)

Frequently Asked Questions - Silverhammer 4 Auna

How to adjust the volume of the amplifier?

Use the volume control (Gain) located on the device. Turn the slider towards MAX if the volume is too low. Be careful not to saturate the signal.

How to adjust the Bass Boost?

The Bass Boost adjustment amplifies frequencies around 50 Hz up to 12 dB. Turn the corresponding potentiometer to increase or decrease the effect.

How to adjust the Treble Boost?

The Treble Boost adjustment amplifies frequencies around 10 kHz up to 12 dB. Adjust it according to your sound preferences.

What is the function of the frequency filter?

The frequency regulator (50-250 Hz) allows you to set the cutoff frequency of the high-pass or low-pass filter, depending on the adjustment. This optimizes the distribution of frequencies between speakers and the subwoofer.

How to replace the fuse?

Cut the power, remove the defective fuse and replace it with a fuse of the same type (7.5 A). Never use a fuse of higher value. If the fuse blows again, consult a professional.

What to do if the protection indicator lights up?

The red indicator indicates overheating, overvoltage, or short circuit. Turn off the device, let it cool down, check connections and speaker load. If the problem persists, contact the dealer.

How to wire the amplifier?

Connect +12 V to the battery (after all other connections), ground (GND) to metal body, and REMOTE to the remote output of the car radio. Use cables of diameter AWG-10 or 5 mm.

What speaker impedance should I use?

The recommended impedance is 2 to 16 ohms in stereo. Do not connect active speakers to the amplifier.

Where to install the amplifier in the car?

Mount the amplifier in the trunk or under a seat, ensuring the cooling fins are not obstructed. Avoid direct exposure to sunlight, heat, moisture, and dust.

How to clean the amplifier?

Use a dry microfiber cloth. Never use detergents or abrasive products. Avoid any contact with moisture.

USER MANUAL Silverhammer 4 Auna

Member of Berlin Brands Group

Handwerkerstr. 11

15366 Dahlwitz-Hoppegarten

Deutschland

Berlin Brands Group UK Ltd

PO Box 1145

Oxford, OX1 9UW

United Kingdom

Congratulations on the purchase of your appliance. Please read the following instructions carefully and follow them to prevent potential damage. We accept no liability for damage caused by disregarding the instructions or improper use. Please scan the QR code to access the latest operating instructions and for further information about the product.

CONTENTS

Safety Instructions 18

Arrangement of the controls 18

Replace fuse 20

Connect the appliance 21

Circuit diagram 22

Input connections 23

Precautions 26

Protective circuit 27

Notes on installation 27

Special disposal instructions for consumers in Germany 28

Disposal Considerations 30

Declaration of conformity 30

TECHNICAL DATA

Item number	10006684, 10006685, 10006686, 10006687, 10006688, 10006689
Power supply 12 V
Dimensions (W x H x D) 45 x 5.5 x 25	cm

SAFETY INSTRUCTIONS

• Repairs to the device should only be carried out by an authorised specialist workshop.
• Do not open the device under any circumstances.
  Incorrect assembly may lead to malfunctions or total failure.
• The device should be protected from any moisture and direct sunlight.
• Do not clean the appliance with detergents.
• Only use a dry (microfibre) cloth for cleaning.
• Only connect the appliance to the designated power supply.
• Never connect the appliance to voltages other than those intended.

ARRANGEMENT OF THE CONTROLS

6	3	7
CH1/2MIN MAX	50 Hz 250	50 Hz 1500
GAIN	L.P.F	H.P.F
CH3/4MIN MAX	50 Hz 250	50 Hz 1500
6	3	7
4	Bass boost control: Boosts frequencies around 50 Hz up to a maximum of 12 dB.
5	Treble boost control: Boosts frequencies by 10 Hz to a maximum of 12 dB.
6	Volume control: Controls the amplification. If the volume seems too low, turn the control towards MAX.
7	Frequency control: Frequency section (50-250 Hz) for high-band filter

REPLACE FUSE

If the fuse is defective, check the power supply and replace the fuse. If the fuse blows again, there is probably an internal defect. You should contact the retailer.

Note: Replace the fuse only with an identical fuse. Never use a fuse with a higher value, otherwise the appliance may be damaged.

• Before connecting components, disconnect the connection to the negative terminal of the battery.
• Make sure that the speakers have sufficient capacity.
• The negative speaker cable must not touch the car body. The negative speaker cables of the left and right speakers must also not be mixed up.
• Route the cables for signal and power supply at a distance from each other, otherwise interference may occur.
• This high-performance amplifier cannot develop its full power with the standard speakers.
• If you have a vehicle with standard navigation, the internal memory may be deleted as soon as you disconnect the negative terminal from the battery.

CONNECT THE APPLIANCE

Connect the cables as shown here.

Note: Tighten the screws, but do not use too much force (the tightening torque should be less than 1 Nm), otherwise the screws will be damaged.

CIRCUIT DIAGRAM

First hold the appliance at the position where it is to be installed. Mark the four points for screw holes. Drill the holes with a diameter of approx. 3mm and fix the amplifier with the 15mm screws. Make sure that the mounting plate (not included) is thicker than 15mm .

Line input (with loudspeaker connection 3)

(For operation please refer to: Arrangement of the operating elements)

3-speaker system

(For operation please refer to: Arrangement of the operating elements)

Note: With this variant, the subwoofer volume is set using the fader setting of the car radio. The output signals to the subwoofer are a combination of the 34 channels or the bass input signal.

2-speaker system

(For operation please refer to: Arrangement of the operating elements)

Power supply

Note: If a radio without remote output is installed, connect REMOTE to the accessory power supply.

Notes on the power supply

• Connect +12 V only after you have connected all other connections.
• The earthing must be securely connected to the body (metal), otherwise faults may occur.
• REMOTE must be connected to the remote output on the radio.
• If a radio without remote output is installed, connect REMOTE to the auxiliary power supply.
• Use a power cable with an integrated fuse (7.5 A 2).
• The fuse must be as close as possible to the battery.
• The +12V and GND wires must have a diameter value of AWG-10 or a diameter of 5 mm.

PRECAUTIONS

The appliance may only be operated on 12 V DC.
The speakers must have sufficient impedance 2 16 (stereo).
- Never connect active speakers to the amplifier.

• Do not install the amplifier where:

exposed to direct sunlight or high temperatures.
exposed to rain or moisture.
- this is exposed to dust and dirt. If the car has heated up in the sun, let it cool down before use.

• If the appliance is installed horizontally, the cooling fins must not be covered by the floor carpet.
• If the appliance is installed too close to the radio, it may interfere with it.
• If there is no power to the appliance, check the connections.
• The appliance has a protection circuit that protects the transistors and speakers in case of malfunction.
• Never attempt to test this protective circuit.
• For safety reasons, always set the volume so that you can still hear the outside noise.

PROTECTIVE CIRCUIT

The circuit protects the appliance from:

Overheating.
- Overvoltage.
- Short circuit

In this case, the fuse lamp lights up red and the appliance switches off. If this happens, switch off the connected accessories and try to find the cause. If the appliance is overheated, let it cool down for a while.

NOTES ON INSTALLATION

• The appliance is installed either under a seat or in the boot.
• Mount the appliance in such a way that the driver's movements are not restricted and the appliance is not exposed to direct sunlight or heat.
• Do not install the appliance under the floor carpet as it may cause heat accumulation.

SPECIAL DISPOSAL INSTRUCTIONS FOR CONSUMERS IN GERMANY

Dispose of your old appliances properly. This ensures that WEEE is recycled in an environmentally sound manner and that negative impacts on the environment and human health are avoided. The following rules must be observed during disposal:

• Every consumer is legally obliged to dispose of electrical and electronic equipment (waste equipment) as well as batteries and accumulators separately from household waste. You can recognise the corresponding waste equipment by the following symbol of the crossed-out waste bin (WEEE symbol).
• You must separate used batteries and accumulators that are not enclosed in the old appliance, as well as lamps that can be removed from the old appliance without destroying it, from the old appliance without destroying it before handing it in at a disposal point.
• Certain lamps and bulbs also fall under the Electrical and Electronic Equipment Act and must therefore be treated as old equipment. Incandescent bulbs and halogen lamps are excluded. Please dispose of light bulbs and halogen lamps with your household waste unless they bear the WEEE symbol.
  Each consumer is responsible for deleting personal data from the electrical or electronic equipment.

The distributors' obligation regarding return of goods

Distributors with a sales area for EEE of at least 400 square metres and distributors of food with a total sales area of at least 800 square metres who offer and make available EEE on the market several times in a calendar year or on a permanent basis are obliged,

1 when supplying a new EEE to an end-user, to take back free of charge at the place of supply or in the immediate vicinity thereof an old EEE of the end-user of the same type which fulfils substantially the same functions as the new EEE; and
2 to take back, free of charge, at the request of the end-user, WEEE that does not exceed 25 centimetres in any external dimension in the retail outlet or in the immediate vicinity thereof; the take-back may not be linked to the purchase of an EEE and is limited to three WEEEs per type of equipment.

• In the case of distribution by means of distance communication, free collection at the place of delivery is limited to electrical and electronic equipment in categories 1, 2 and 4 according to Article 2(1) of the Electrical and Electronic Equipment Act, namely "heat transmitters", "display screen equipment" (surface area of more than 100cm^2 ) or "large equipment" (the latter with at least one external dimension exceeding 50 centimetres). For other electrical and electronic equipment (categories 3, 5, 6), a return option must be guaranteed at a reasonable distance from the respective end user.
• Old appliances may be handed in free of charge at the local recycling centre or at the following collection points near you: www.take-e-back.de
• For electrical and electronic equipment in categories 1, 2 and 4, we also offer the possibility of free collection at the place of delivery. When purchasing a new appliance, you have the option of selecting an old appliance collection via website.
• Batteries can be returned free of charge wherever they are sold (e.g. supermarkets, DIY stores, drug-stores). Recycling centres also take back batteries. You can also return batteries to us by post. Used batteries in household quantities can be returned directly to us free of charge from Monday to Friday between 07:30 and 15:30 at the following address:

Chal-Tec GmbH

Member of Berlin Brands Group

Handwerkerstr. 11

15366 Dahlwitz-Hoppegarten

Germany

• It is important to note that, for safety reasons, lithium batteries must be secured against short-circuiting before they are returned (e.g. by taping off the terminals).
• If there are also the signs Cd, Hg or Pb under the crossed-out dustbin on the battery, this indicates that the battery contains hazardous substances. ("Cd" stands for cadmium, "Pb" for lead and "Hg" for mercury).

Note on waste prevention

By extending the life of your old appliances, you help to use resources efficiently and avoid additional waste. You can extend the life of your old appliances by having defective old appliances repaired. If your old appliance is in good condition, you could donate it, give it away or sell it.

If there is a legal regulation in your country regarding the disposal of electrical and electronic equipment, this symbol on the product or on the packaging indicates that this product must not be disposed of with household waste. Instead, it must be taken to a collection point for the recycling of electrical and electronic equipment. By disposing of this product in accordance with the regulations, you protect the environment and the health of those around you from negative consequences. For information on recycling and disposal of this product, contact your local government or household waste disposal service.

This product contains batteries. If there is a legal regulation in your country regarding the disposal of batteries, the batteries must not be disposed of in household waste. Consult your local regulations for the disposal of batteries. By disposing of this product in accordance with the regulations, you are protecting the environment and the health of those around you from negative consequences.

DECLARATION OF CONFORMITY

Manufacturer:

Chal-Tec GmbH, Wallstraße 16, 10179 Berlin, Germany.

Importer for Great Britain:

Berlin Brands Group UK Ltd

PO Box 1145

Oxford, OX1 9UW

United Kingdom

The complete manufacturer's declaration of conformity can be found at the following link: https://use.berlin/10006689

Cher client, chere clientele,

Member of Berlin Brands Group

Handwerkerstr. 11

15366 Dahlwitz-Hoppegarten

Germania

Berlin Brands Group UK Ltd

PO Box 1145

Oxford, OX1 9UW

United Kingdom