DLS Svenska AB A5, A8 Series, A2, A1 Noise Problems, Speaker Polarity Check, Constant Whining Noise

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ULTIMATE A-series

 

 

 

 

Professional Tip:

 

Professional Tip:

 

 

 

 

 

NOISE PROBLEMS

SPEAKER POLARITY CHECK.

WHINING NOISE VARYING WITH ENGINE REVOLUTIONS:

Do this:

1.Rewire the power supply (12 V) to source unit direct from battery.

2.Rewire ground wire from source unit to clean position on chassis.

3.Check all power connections to ensure that they are clean and tight.

4.Check quality of system ground connection.

5.Install a Power Cap capacitor. This can be helpful against most noise problems.

CONSTANT WHINING NOISE:

Do this:

1.Ensure that all equipment has a common ground point.

2.Check quality of earth strap connection from battery negative terminal to chassis.

3.Disconnect signal cables from amplifier to see if noise disappears. If so the leads are picking up noise. Test this by laying a new cable over the seats and reconnecting to the amplifier. If the noise does not return, re- route original cable away from source of interference.

If noise remains regardless of cable position, try to use so called Quasi-balanced signal cables. DLS PRO and Ultimate-cables are Quasi-balanced.

Professional Tip:

Installing in trunk

When installing the amplifier in the trunk, run the power wires along the same path as the other vehicle wiring. Many cars have insulated channels for wiring. you will have to remove the door sill trim and the carpet.

Professional Tip:

Crimp connections

Purchase crimp connectors and crimping tool. Connectors are color coded.

1.Strip 1/4 inch (6 mm) of insulation from the wire.

2.Insert into connector

3.Crimp tightly

All speakers in a car audio system should be connected in phase (the same polarity). All spea- ker cones must move in the same direction. Out of phase speakers will cause a lack of bass, and a poor stereo soundstage.

Checking polarity:

Hold the - connection of the speaker wire to the - terminal of a 1,5 Volt flashlight battery. Tap the + wire on to the + terminal of the battery, and observe the movement of the cone. The cone should move outwards when the wire touches the battery, and inwards when the battery is removed. If it is the other way around, the speaker has been connected backwards and it must be removed and connected correctly.

If your system also has a subwoofer connected through a passive 6 or 12 dB crossover, try to connect this with various polarity and judge what sounds best. The phase shift in passive crossovers sometimes makes it necessary to change polarity.

 

+

 

Battery

+

1,5 Volt

 

-

-

NOTE! Tweeters can not be tested this way, double check the connections instead.

Professional Tip:

Securing wires

Use wire ties to bundle together when possible. (But never bundle speaker wires or signal cables together with power wires).

Professional Tip:

Speaker and power wires

Do not run speaker and power wires next to each other. Power wires can generate a ”siren” sound in the speakers. Run speaker and power wires on opposite sides of the car.

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Contents Welcome ContentsBefore you begin to install Disconnect Battery Ultimate A-seriesAmplifier location Amplifier installation kit Ultimate A-series Tools and material needed Routing wiresConversion Gauge mm2 ToolsUltimate A-series Remote terminal REM For RCA cable signal inputGround Terminal GND Fan terminalInput Wiring Ultimate A-series Phase control on A5, A6 and A7Remote bass level and phase shift control on A5, A6 and A7 Power / Protect lightAmplifier front Ultimate A7DLS A4 DLS A1DLS A5 DLS A6Highpass filter on front channels Crossovers / filters on A7Highpass filter on rear channels Filters on sub ChannelSpeaker Polarity Check Noise ProblemsWhining Noise Varying with Engine Revolutions Constant Whining NoiseUltimate A1-A2 Button out Fuse Pre out 60 a FM1 107,3 Battery Volt RemoteDLS A1 and A2 can be connected in different ways One speaker pair connected in stereoTwo stereo speaker pairs Connected in parallel Connection in mono with one subwoofer in bridge modeDLS A1 Button outUltimate A3 Wiring Examples DLS A3DLS A3 can be connected in different ways Stereo with one front and one rear speaker systemHP-filter setting 30 Hz LP-filter setting 60-80 Hz Button Mono bridge modeOne or more subwoofers DC Feed DLS A3HP-filter setting 80-100 Hz Wiring Examples A4HP-filter setting 30 Hz LP-filter setting 70-80 Hz Button DC Feed DLS A4HP-filter not in use LP-filter not in use Ultimate A4 DC-FEED DLS A4FM1 107,3 HP-filter not in use LP-filter not in use Button out Pre out RearButton Own tests HP-filter setting 400 HzUltimate A5 Wiring Examples A5Connection of a front system Stereo and a subwoofer in monoWiring Examples A6 Connection of two 4 ohm subwoofersUltimate A6 DC Feed DLS A6 Wiring Examples A7 A7 in Bridge ModeDC Feed DLS A7 Front Rear Tweeters with active high-pass x-over setting at 4 kHzSwitch settings in this example Filter settings HP-filter setting Button HP-filter setting 80 Hz LP-filter setting 400 HzFilter settings Switch settings in this example Example 1 Speaker wiring with front and rear speakers Wiring Examples A8Ultimate A8 Button Out Button outFilter settings Front HP-filter OFF LP-filter settingLP-filter Setting 70-80 Hz Rear HP-filter OFF Subwoofer 2 4 ohmReconnect Battery Test power wiringTest speaker connections Specifications A1 to A6 Channel 1&2 Specifications A7 & A8Channel 3&4 Subchannel

A3, A4, A7, A6, A1 specifications

DLS Svenska AB is renowned for its innovative audio solutions, and its A-series speakers, specifically models A1, A5, A6, A7, and A8, underscore this commitment to superior sound quality and cutting-edge technology.

The A1 is the entry-level model, yet it showcases impressive features that set it apart. With a compact design, it is ideal for smaller spaces while still delivering a powerful sound experience. The speaker incorporates advanced driver technology for clear mids and an extended frequency range. It is compatible with various audio inputs, making it a versatile choice for multiple setups, from casual listening to more complex audio systems.

Moving to the A5, this model emphasizes broader soundscapes without sacrificing clarity. It boasts a robust cabinet design, which minimizes resonance and distortion. The A5 features a high-performance woofer and tweeter that work seamlessly to produce a balanced audio profile. Added connectivity options, including Bluetooth, allow for easy streaming from devices, making it convenient for users who value flexibility.

The A6 takes things a step further with enhanced power and performance. Designed for both home and professional use, it offers a more extensive dynamic range and impressive volume levels without compromising on sound quality. The A6 implements proprietary technologies such as phase coherence, ensuring that audio playback is precise and immersive. Its stylish design is also a significant selling point, allowing it to blend seamlessly into any environment.

The A7 is built for audiophiles who demand more from their equipment. With a focus on advanced acoustics, the A7 incorporates a sophisticated crossover design that ensures each frequency range is represented accurately and with depth. It also features high-grade materials in both its components and cabinet construction, resulting in a durable yet aesthetically pleasing product.

Finally, the A8 represents the pinnacle of the A-series lineup. Designed for large spaces or high-fidelity requirements, the A8 delivers extraordinary sound pressure levels and richness in audio. Integrated with advanced DSP technology, it offers tailored sound profiles suitable for different environments. The A8 is engineered for exceptional bass performance, ensuring that every note is not just heard, but felt.

Collectively, the A1, A5, A6, A7, and A8 series by DLS Svenska AB illustrates a commitment to quality, design, and innovation. Each model caters to various needs and preferences, ensuring that there is a perfect match for any audio enthusiast.
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