T R O U B L E S H O O T I N G
Use the following guide to identify symptoms and solve problems. Make sure the vehicle’s electrical system is working properly and power is reaching the Kappa 255a (i.e., green LEDs on the top panel are on).
SYMPTOM | LIKELY CAUSE | SOLUTION |
No audio | Low/No Remote | Check connections; |
| test | |
| Speakers are not | Check wiring; use |
| connected or are | VOM/DVM to |
| blown | measure speaker |
|
| coil impedance |
Distorted audio | Input sensitivity | See Setting Input |
| is not set properly | Sensitivity on |
|
| previous page |
Audio lacks | Speakers are wired | Check polarity of |
“punch” | with wrong polarity | connections; refer to |
|
| Applications (pages 3 |
|
| and 4) |
SYMPTOM | LIKELY CAUSE |
Audio cycles | A protection circuit |
off and on; | is turning the |
Amber protec- amplifier off and on tion LEDs (on
top panel) are on
Audio cycles | GAIN is set too high |
off and on; |
|
Amber protection |
|
LEDs (on top |
|
panel) are on |
|
Fuse blows | Incorrect wiring or |
| short circuit |
SOLUTION
Verify the following– electrical system is between 10 ~ 15.5 Vdc; temperature is not over 194°F (90°C); no short circuits; speaker loads are not less than 1 ohm
(2 ohms in mono)
Set Input Sensitivity correctly (see previous page)
Check connections; refer to Applications (see pages 3 and 4)
S P E C I F I C A T I O N S
K A P P A 2 5 5 A . . .
Power Output, 4 ohms: | 4 x 50 and 1 x 200 watts |
Power Output, 2 ohms: | 4 x 75 and 1 x 300 watts |
Power Output, Bridged 4 ohms: 2 x 150 and 1 x 200 watts
Frequency Response: | 20 Hz ~ 20 kHz |
Input Sensitivity: | 250 mV ~ 9 V |
THD + Noise (4 ohms): | 0.05 % |
> 95 dB | |
Maximum Current Draw: | 80 A |
Dimensions (w x h x l): | 23 x 2 3 ⁄16 x 81 ⁄2 in. |
| 584.2 x 55.6 x 215.9 mm |
DBO FREQ Control |
| DBO Q Control | |||
| (adjusts | (adjusts boost amount | |||
dB |
| frequency) | dB | at | |
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0 |
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| 12 |
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| 6 |
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| 0 |
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20 | 80 Freq. (Hz) | 20 | 80 Freq. (Hz) | ||
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Figure 8. Frequency response curves show range of Kappa 255a DBO controls.
®
©1997, Infinity Systems, Inc., 20630 Nordhoff Street, Chatsworth, CA 91311, USA
VOICE (818)
www.infinitysystems.com
Infinity constantly strives to update and improve existing products, as well as create new ones; therefore, the specifications and construction details in this and related Infinity publications are subject to change without notice. Dynamic Bass Optimizer and Unibloc are trademarks of Infinity Systems, Inc. Weco is a registered trademark of Weco, Inc.
8 – Infinity Kappa 255a Power Amplifier | P/N SH1105 Rev. 2 |