FINAL SYSTEM CHECK
INPUT SENSITIVITY ADJUSTMENT
The Input Sensitivity Control is located on the Front Panel. The objective of input sensitivity adjustment is to match the output of the source unit with the input of the amplifier. The output voltage of individual source units can vary. For example, some radios have an output of 200 mV, others have 5 Volts or more. To cater to these variations, the 160SE amplifier has an adjustable input sensitivity level that ranges from 100 mV to 5 volts.
Adjusting this control requires some experimenting. Basically you want all the gain at the begin- ning of the system, NOT at the end (amplifier). Turn your headunit volume UP and keep your amplifier gains at the minimum possible settings. This will give you the best sound and lowest signal to noise ratio.
Besides better sonic reproduction, proper input sensitivity also helps to prolong the reliability span of your amplifier by eliminating excessive internal temperature generated by incompatible source unit output and amplifier input.
Note : Turning the input gain UP does NOT indicate MORE power. Just MORE noise. The input gain control IS NOT a power control. REMEMBER that the input gain control has nothing to do with the power output of the amplifier.
NPUT SENSMODE
18 |
www.coustic.com
CROSSOVER SELECTION
The amplifier has
1.When the
2.When the
3.When the filter is switched off, the amplifier is used as a full range amplifier.
CROSSOVER FREQUENCY SELECTION
Both the
80Hz -
SS |
| MODE | FREQ |
| MAXMAX | HPF OFF LPF | 80 120 |
Figure 10: Crossover Frequency Selection
MIN | MAX HPF OFF LPF |
5 volts | 30 |
.1 volt |
Figure 9: Input Sensitivity Control
1. | Turn the Input Sensitivity Control all the way down (counter clockwise). |
2. | Set the volume control of the source unit to approximately 2/3 of its maximum output. |
3. | Turn the balance control of the source unit to its center position. |
RCA |
|
outputs | OPTION 1 |
| |
| |
PWR |
|
+ | II |
| |
SEL |
|
| DISC |
– | TUNE1 2 3 4 5 6 |
CD527 CD/RECEIVER
and CD CHANGER CONTROL
OPTION 2
(Note: You cannot use both RCA and speaker lead inputs simultaneously!!)
FRONT
speaker lead
outputs
A
B
Battery
B
– | A.S. | + |
| Auto Aligned |
|
| MODE | POWER | |
|
|
|
| Azimuth System |
|
| P. C |
| |
|
|
|
|
|
|
|
| L |
|
| TRACK |
| P.ME |
|
| DIS | PRO | BAN | DIS |
|
|
|
| G | D | P | |||
|
|
| ASM | LOU |
| TUNEC |
|
|
|
|
|
| M | D |
| 70∝ | SHUFF D.SCAN DISC D.RPT |
| 70∝ s TPS |
|
|
|
| TP |
| TRACK | ME | AM FM 1 2 | |
1 D. SCAN | 2 SHUFF | 3 T. | S | 5 D. RPT | S |
|
| 3 | |
4 T. SCAN | 6 P. PLAY |
|
| ST | |||||
|
|
| RPT |
|
|
|
|
| LOUD |
Anybody’s leased car: high power In dash
4. | Leave the tone (bass/treble) controls at their usual position. |
5. | Play a CD or tape track with greater dynamic range |
6. | To locate the optimum input sensitivity setting, ask the person assisting you to turn the Input |
| Sensitivity Control clockwise until audio distortion starts to develop. Turn the sensitivity |
| control backwards slightly to minimize the distortion. |
7. | If you constantly switch between CD/tape and radio, you will need further adjustment since |
| radio output level differs from that of CD or tape. In this case, you need to locate a balanced |
| sensitivity setting which is best for both the output level of radio and that of CD or tape. |
option 2 | 160SE | ||
FRONT speaker | POWER AMPLIFIER | ||
lead Inputs | |||
LoZ | (crossover set at 80Hz) | ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
option 1
FRONT RCA
lead Inputs
HiZ
–
+
6 1/2 inch
–
+
12
A
B
Figure 11. Typical System connection
13
