DLS MRA31 매뉴얼 - 페이지 5

{카테고리_이름} DLS MRA31에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. DLS MRA31 14 페이지. Marine audio amplifiers
DLS MRA31에 대해서도 마찬가지입니다: 설치 및 운영 방법 (12 페이지)

페이지 인쇄

Input Level control

The input level control, 5V – 0,25 V,

matches the output of your radio to

the input of the amplifier. After instal-

lation is complete, make sure the in-

put of the amplifier is turned down all

the way ( counter-clockwise at 5V ).

Play a tape or CD, make sure all bass or treble

settings or equalizer are flat, and turn the volume of

the radio up until you just start to hear distortion.

Turn the volume control down just a bit. On the

amplifier increase the input level control ( clockwise

or to the right ) until you just start to hear distortion,

then back the level control just a bit. Now your radio

and amplifier levels are matched.

Phase control MRA31

The phase control on MRA31

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 that the bass

sound is coming from the front. If you dont get the

result you want, also try to

phase reverse 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.

Crossovers

All amplifiers include high pass filter

( HPF ) and low pass filters ( LPF).

All filters are continously variable and all filters can

be switched on and off. MRA31 also include a

subsonic filter.

High Pass Filter (HPF)

Filter frequency range:

HPF

MRA22: 15-150 Hz

50Hz 220Hz

MRA31: 50 - 150 Hz

MRA41:

15Hz 500Hz

Ch A/B: 15 - 500 Hz

Ch C/D: 15(150)Hz - 500(5k) Hz

Off On

The HPF (high pass filter) blocks very low

frequencies from reaching the speakers. It is mostly

used at say 60 Hz to protect small speakers (like 6

inch and smaller) from deep bass. It can also be

used as subsonic filter to take away the very

deepest frequencies from a bass box. The typical

setting is then around 25 – 40 Hz.

The filter can be switched off if you want to run the

amplifier in full range mode.

On MRA41 the filter can also be used for active

crossover in a 2-way speaker component kit, a

typical crocssover point is then 3,5 - 4 kHz.

Low Pass Filter (LPF)

Level

0,25V

Off On

The LPF (low pass filter) mostly used for

subwoofers. It will allow low frequencies only and

blocks higher frequencies. A typical setting is 50 –

80 Hz. The filter can be switched in and out.

This is normally used for subwoofers

On MRA41 the filter can also be used for active

crossover in a 2-way speaker component kit, a

typical crocssover point is then 3,5 - 4 kHz.

can be set

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.

PHASE

For sub channel C only.

Grand bass on MRA41

180

Grand Bass is used to increase the bass volume

at an interval of bass frequencies. You can select

the center frequency between 25Hz and 80 Hz and

the amplification between 0 dB ( no amplification )

and 18 dB ( full amplification ).

The slope of the filter is 10 – 12 dB at maximum

setting.

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.

MRA22, MRA31, MRA41

LPF

Filter frequency range:

MRA22: 50-500 Hz

80Hz 200Hz

MRA31: 50 - 120 Hz

MRA41:

50Hz 500Hz

Ch A/B: 50(500)Hz - 500(5k)Hz

Grand Bass

40Hz 60Hz

25Hz

80Hz

0dB

18dB

Subsonic

Off On