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Specifications

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development.
For this reason all or part of specifications & designs
may be changed without prior notice.

MRA22, MRA31, MRA41

DLS MARINE AUDIO

MRA 31

Number of channels

Power output, 4 ohm (0,1% THD)

2 x 65 W

Power output, 2 ohm (0,2% THD)

2 x 90 W

Power output, 4 ohm bridged

1 x 170 W

Power out mono sub ch. 4 ohm

1 x 170 W

Power out mono sub ch. 2 ohm

1 x 280 W

Signal to noise ratio, A-weighted

>100 dB

Damping factor

>100

Frequency response

10 Hz - 35 kHz

Input impedance, low level

>10 kohm

Input impedance, high level

100 ohm

High level input with auto start

Yes

Low output (RCA output)

Input sensitivity

0,25 - 5V

Variable phase shift control CH C 0-180 degrees
Filter high pass CH A & B

50-150 Hz*

Filter low pass CH C

50-120 Hz*

Subsonic filter CH C

Fixed 25 Hz*

* can be switched in/out
Power consumption, idle

1,0 A

Fuse

2 x 30 A

Dimensions HxWxD(mm)

70x357x268

Dimensions (inch)

2,92x14,06x10,55

Weight

4 kg

All output power ratings at 13,8 VDC

DLS MARINE AUDIO

MRA 22

MRA41

Number of channels

Power output, 4 ohm (0,1% THD)

2 x 60 W

4 x 70 W

Power output, 2 ohm (0,2% THD)

2 x 100 W

4 x 125 W

Power output, 4 ohm bridged

1 x 200 W

2 x 200 W

Signal to noise ratio, A-weighted

>100 dB

Damping factor

>100

Frequency response

10 Hz - 35 kHz

Input impedance, low level

>10 kohm

Input impedance, high level

100 ohm

High level input with auto start

Yes

Low output (RCA output)

Yes

Input sensitivity

0,25 - 5V

Grand bass adjustable frequency -

25 Hz - 80 Hz

Grand bass adjustable gain

0 - 18 dB

Filter highpass /subsonic

15-500 Hz*

see spec. below

Filter lowpass

50-500 Hz*

see spec. below

* can be switched in/out
Power consumption, idle

0,5 A

1,0 A

Fuse

1 x 25 A

2 x 30 A

Dimensions HxWxD(mm)

70x230x268

70x372x268

Dimensions (inch)

2,92x9,06x10,55

2,92x14,65x10,55

Weight

2,7 kg

4,2 kg

Filter configuration MRA41

Channel A/B:

Highpass: 15 - 500 Hz*
Lowpass: 50(500) - 500(5k) Hz*
(x 10 switch)

Channel C/D:

Highpass: 15(150)Hz - 500(5k)Hz*
(x 10 switch)

* can be switched in/out

Содержание MRA22

Страница 1: ...ound on our WEB site www dls se Contents Installation 2 Tools and materials needed 3 Amplifier installation kit 3 Wiring Power and Remote 3 Input and controls Input wiring Hi Low level 4 Parallel input 4 Hi Low input switch 4 Fuses Protect light 4 Input level control 5 Phase control 5 Crossovers 5 MRA 22 speaker wiring Front speakers 6 Subwoofer 6 MRA 31 speaker wiring Front speakers 7 Subwoofer 7...

Страница 2: ...tem wiring outside or underneath the vessel This is an extremely dangerous practice which can result in severe damage to your vessel and person Protect all system wires from sharp edges metal fiberglass etc by carefully routing them tying them down and using grommets and loom where appropriate Do not mount the amplifier in the engine compartment or in any other area that will expose the amplifier ...

Страница 3: ...ust have the same size Wiring Connect power and remote Connect the fuse holder as close to the vessel battery as possible using AWG 8 10 mm2 or heavier cable Use a ring crimp terminal cable to connect to battery Apply silicon grease to the fuse to prevent corrosion Use a 50 Amp fuse for both amplifiers Connect the battery cable by a crimp fork terminal spade to the 12 Volt on the amplifier Do like...

Страница 4: ...ot available on MRA31 Input Output A A B B Parallel input on MRA31 MRA41 On MRA31 the PC position internally connects the A B input with the input for channel C On MRA41 the PCD position internally connects the A B and C D inputs High Input C D Ch White A ch White Black A ch Grey Black B ch Grey B ch Power Green Protect Red Power Light Protect light The power light green comes on when the amplifie...

Страница 5: ... the subwoofer connections and make a new adjustment NOTE This function is intended for car use and may not be fully functional in boats Set the control to 0 Phase control MRA31 0 180 PHASE Subsonic filter MRA31 The Subsonic filter blocks the very deepest frequencies from reaching the subwoofers It has a fixed frequency of 25 Hz and can be switched On Off For sub channel C only Level 5V 0 25V LPF ...

Страница 6: ...tion This way we can use this amplifier to feed a 2 way system where the midbasses are fed from 80 Hz 4 kHz The tweeters connected to channel C D operate from 4 kHz upwards using the HPF in multiplier po sition x 10 150 Hz 5 kHz Multiply x1 x10 80 800Hz Off On 200 2 k Hz 50 500Hz 500 5 k Hz LPF HPF 50 500Hz 220 2 k Hz 15 150Hz 500 5 k Hz Off On Multiply x1 x10 The MRA31 is a three channel amplifie...

Страница 7: ... as subsonic filter to take away the very deepest frequencies The typical set ting is around 25 40 Hz The LPF will allow low frequencies only and blocks higher frequencies A typical setting is 70 90 Hz LPF Off On 80Hz 200Hz 50Hz 500Hz Filter settings NOTE 4 ohm minimum load when using bridge mode connection Lower impedances may damage the amplifier In bridge mode the amplifier sees a 4 ohm load as...

Страница 8: ...urn on the subsonic filter if you want to remove these frequencis The LPF will allow low frequencies only and blocks higher frequencies A typical setting is 60 80 Hz The phase control can be set continuously from 0 180 degrees This is very useful when you want to adjust the bass sound for best front stage image Start on 0 and turn the control slowly clockwise until you experience the bass sound co...

Страница 9: ...0Hz 500 5 k Hz LPF 220 2 k Hz MRA41 Speaker wiring MRA 41 three different wiring examples 1 Four fullrange speakers to MRA41 One pair in front and one pair in rear Rear speakers Front speakers Filter settings A B Channels With the HPF filter in OFF position the amplifier allows the speakers to play fullrange If you for some reason want to limit the low bass reproduction switch on the HPF filter Th...

Страница 10: ... switch on the HPF filter The typical setting is then around 60 80 Hz Switch the LPF filter switch to ON and the Multiply switch to x10 position Now you can adjust the filter setting from 500 Hz to 5 kHz Adjust the setting to 4 kHz Channel C D are used for tweeters and must be set to play from 4 kHz and up The HPF filter switch must be ON and the multiply swich in x 10 position Now you can adjust ...

Страница 11: ... 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 control pos...

Страница 12: ...onnection 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 ...

Страница 13: ...sions inch 2 92x14 06x10 55 Weight 4 kg All output power ratings at 13 8 VDC DLS MARINE AUDIO MRA 22 MRA41 Number of channels 2 4 Power output 4 ohm 0 1 THD 2 x 60 W 4 x 70 W Power output 2 ohm 0 2 THD 2 x 100 W 4 x 125 W Power output 4 ohm bridged 1 x 200 W 2 x 200 W Signal to noise ratio A weighted 100 dB 100 dB Damping factor 100 100 Frequency response 10 Hz 35 kHz 10 Hz 35 kHz Input impedance ...

Страница 14: ......

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