ULTIMATE A-series
Phase control on A5, A6 and A7
Input and controls
Input Wiring
Inputs are low level from the RCA output of the head unit.
Low level input
Use a pair of shielded stereo audio cables with RCA type jack. Most
DLS A1, A2 and A3 uses a single pair of RCA inputs while three and four channels amplifiers like A4, A5 and A8 uses dual pairs of RCA inputs A7 is a multi channel amplifier with three separate
The phase control on 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
at 0 and turn the control slowly | PHASE | ||||
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clockwise until you experience |
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that the bass sound is coming | 0 180 | ||||
from the front. If you dont get the | DEGREE | ||||
result you want, also try to phase |
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reverse | the | subwoofer |
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connections and make a new adjustment. On A5 you find this control on the amplifiers left side.
Remote bass level and phase shift control on A5, A6 and A7
inputs. On next page you can
A remote level and phase
Remote Bass Level
see how to connect the RCA inputs of A7.
Use high quality interconnects like the DLS SL5 PRO or SL5 Ultimate that has an effective shielding.
When you run the signal cables remember to keep them well spaced from the wiring loom and the power feed to the amplifier to avoid picking up interference. Lay the power cables and signal cables separated on each side of the car. Any extra cable must be laid in
Input Level control
shift control is included with A5, A6 and A7 amplifiers. You can adjust the bass level and phase from the front seat of your vehicle.
Connect it to the socket marked Remote Bass Level. When using a remote level control you must activate it by pushing the switch bes- ides the socket, to
IN
OUT
Phase
Level
LEVEL
7V 0,5V
The input level control, 7V – 0,2 V, (5V - 0,2 V on A8) matches the output of your head unit to the input of the amplifier. After installation is complete, make sure the input of the amplifier is turned down all the way (
On three/ four channel amplifiers like the A4, A5 and A8 it´s necessary to adjust the levels indiviually to achieve a good sound balance between the diffe- rent speakers, different speakers have different sensitivity. When using two of the channels for subwoofer operation, start the level adjustment on these channels. After having adjusted the bass level for good performance, adjust the level to the front system for a good sound balance.
Remote Bass Level & phase shift control
Power / Protect light
The power light (blue) is turned on when Power the amplifier is turned on.
(Blue)
| The protect light ( red ) is turned on |
| when the amplifier shuts down from |
Protect | overheating, or a short circuit (speaker |
(Red) | failure) |
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The amplifiers have an internal high current protection circuit shutting down the amplifier if the current draw is too high. It is indicated with a LED marked ”PROTECT”. The protection circuits will reset by turning the head unit off and on again.
The amplifiers also have a thermal protection that turns off the amplifier if getting to hot. It will resume operation after cooling down. If necessary install an external cooling fan.
There are one or two fuses on the front. Disconnect the main fuse before replacing any of these. Always replace with the same type and value.
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