DLS X-program X-D10 Owner'S Manual Download Page 14

NOISE PROBLEMS

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-cables are
Quasibalanced.

SPEAKER POLARITY CHECK.

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:

Professional Tip:

Professional Tip:

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.

Securing wires

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

Professional Tip:

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.

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

14

Summary of Contents for X-program X-D10

Page 1: ...er wiring Front speakers 9 Subwoofer 9 X D30 speaker wiring Two speakers and subwoofer 10 X D40 speaker wiring Four speakers 11 Two speakers and bridged subwoofer 11 Connection of subwoofers 12 Testing 13 Troubleshooting 13 Professional tips 14 Specifications 15 Technical Assistance For technical assistance ask the shop where the product was sold or the distributor in your very coun try Informatio...

Page 2: ...der a seat or in the trunk When you select a location do remember that the amplifier generates a lot of heat Choose a location where air can circulate freely around the amplifier Do not cover the amplifier with carpets or hide behind trim panels Do not mount the amplifier in an inverted or upside down position Check all locations and placements carefully before making any cuts drilling any holes o...

Page 3: ...r 1 pc of fuseholder to install close to the car battery fuse 50 Ampere 20 feet of AWG 15 1 5 mm2 wire for remote turn on off cable from radio RCA cable for input from radio 20 feet or 5 meter for trunk installations 12 feet or 2 3 meter for under seat installations Four to eight splicers to connect speaker cables to high level input cable if high level input is used Wire ties Insulating grommet o...

Page 4: ...mote cable in the RCA cable itself or use a separate cable Sometimes a small disturbance may enter the amplifier coming from the remote voltage through the built in remote wire and into the RCA cable Thus we recommend to use a separate remote wire and run the RCA lead separate from remote wire power cables and speaker cables You can insert the cable directly into the amplifier terminal If there is...

Page 5: ...polarity of plus and minus you can change the phase X D10 20 25 30 On these models you connect as in this example X D30 On X D30 the high level signal is fed internally to channel SUB when using high level input X D40 The four channel amplifier is connected likewise however we have four channels You can feed two channels from RCA and two channels using high level input from rear speaker cables 5 R...

Page 6: ...e bass sound for best front stage image Start at 0 and turn the control slowly clockwise until you experience that the bass sound is coming from the front If you don t get the result you want also try to phase reverse the subwoofer connections and make a new adjustment On models X D20 X D25 the phase control and LP filter can be switched on off Phase control X D10 D20 D25 D 30 Subsonic filter X D2...

Page 7: ... 4 channel amplifier where the fil ter configuration is the same for both front and rear channel pairs The amplifier has the following filters features Lowpass filter adjustable from 50 to 500 Hz Highpass filter adjustable between 50 to 500 Hz The filters can be turned off for running the amplifier flat Built in subsonic 25 Hz 18 dB for all channels Bass boost adjustable 0 18 dB The X D30 is a 3 c...

Page 8: ...nect subwoofers to amplifiers Crossover 50 Hz 500 Hz 150 Hz 250 Hz Phase 0 180o Bass boost 0 18 dB This function is used to compensate for the bass box function and to adjust for your own taste of bass Set level control at 0 dB if you want it to be inoperative NOTE Use the bass boost very carefully The sound can be destroyed if you turn it up to high Start at 0 and turn the control slowly clockwis...

Page 9: ...8 dB This function is used to compensate for the bass box function and to adjust for your own taste of bass Set level control at 0 dB if you want it to be inoperative NOTE Use the bass boost very carefully The sound can be destroyed if you turn it up to high Start at 0 and turn the control slowly clockwise until you experience that the bass sound is coming from the front If you don t get the resul...

Page 10: ...It can be switched on off The cutoff frequency is 25 Hz Normal position is ON Subsonic Off On The low pass filter is used for subwoofers It will allow low frequencies only and blocks higher frequencies A typical setting is 50 70 Hz LPF 30 Hz 150 Hz 60 Hz 100 Hz The phase control can be set continuously from 0 180 degrees This function is used together with subwoofers This is very useful when you w...

Page 11: ...to adjust for your own taste of bass Set level control at 0 dB if you want it to be inoperative NOTE Use the bass boost very carefully The sound can be destroyed if you turn it up to high Bass boost 0 18 dB With the filter switch in Flat position the amplifier allows the speakers to play fullrange When you have a subwoofer in your system it is adviceable to limit the low bass reproduction to the f...

Page 12: ... resulting impedance is 2 ohms CONNECTION OF SUBWOOFERS IN BRIDGE MODE TO DLS STEREO AMPS On DLS mono amplifiers with dual speaker connectors both the and terminals are internally connected in parrallel 4Ω Single voice coil subwoofer connected in bridge mode Impedance 4 ohm Amplifier load 2 ohm Amplifier speaker terminal L L R R 4Ω Single voice coil subwoofer connected in bridge mode Impedance 2 o...

Page 13: ... OFF AFTER 10 30 MINU TES The amplifier is overheating due to inadequate venti lation Check mounting position is free from obstruction Do this 1 Move the amplifier to a place with better ventil ation 2 Install one or two fans to cool down the heat sink 3 Overheating can also be caused by an impedance load below the level permitted NO OUTPUT FROM ONE OR MORE SPEAKERS Check the following 1 Balance c...

Page 14: ...ght 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 crossov...

Page 15: ... HxWxD mm 50x298x250 50x258x250 50x298x250 Dimensions inch 2x11 8x10 2x10 1x10 2x11 8x10 Weight 3 2 kg 2 8 kg 3 5 kg X program X D30 X D40 Number of channels 3 4 Power output 4 ohm 0 1 THD 2 x 120 W 4 x 110 W Power output 2 ohm 0 2 THD 2 x 200 W 4 x 180 W Power output 4 ohm bridged 1 x 310 W 2 x 380 W Power out mono sub ch 4 ohm 1 x 220 W N A Power out mono sub ch 2 ohm 1 x 330 W N A Signal to noi...

Page 16: ...DLS Svenska AB P O Box 13029 SE 40251 Göteborg Sweden Tel 46 31 840060 Fax 46 31 844021 E mail info dls se www dls se ...

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