Roksan Audio 5-CH AMPLIFIER - Manual (Page 7)

Please refer to the front panel view on page 4.
After connection to the Mains supply, switch the Caspian 5-Channel Power Amplifier ON at the rear panel. It will
enter STANDBY and the STANDBY LIGHT (2) glows RED. Press either of the MODE buttons (1 or 9), after a
couple of seconds, the amplifier will set it self in AUTO mode and the AUTO LIGHT (8) will glow GREEN and the
STANDBY LIGHT (2) will extinguish. Your Caspian 5-Channel A/V Power amplifier is now ready for use.
To set the amplifier back into standby, press either of the MODE buttons (1 or 9), and the AUTO LIGHT will
extinguish and the STANDBY LIGHT (2) glows RED.
Thanks to its advance circuit design and 1 kVA power transformer, the Caspian 5-Channel Power amplifier is
capable of audiophile sound quality with excellent transient power to compliment both ‘pure audio’ and
audio/visual sound tracks. Your Caspian 5-Channel power amplifier is a high power, high current amplifier with
very low distortion.
Most of the time, even with the most demanding material, it will not current limit and the distortion will remain
ultra low. However when using low impedance loudspeakers at very high volume levels or when the surround
sound processor output is set too high, the amplifier may occasionally current limit and its output distortion begin
to increase. The control circuit of your 5-Channel Power Amplifier will automatically detect this and on the front
panel display the corresponding channels’ Overload Indicator (3, 4, 5, 6 or 7) will glow RED. You should first
check the output of level of your surround sound processor and if it is set too high Trim it lower. Secondly lower
the Master Volume and if applicable consider Multi-Amping your loudspeakers.
IMPORTANT NOTE: The current Overload Indicators will only illuminate if the amplifier is driven continuously at
or past its maximum current capacity. These indicate overload of the power supply just before the onset of
audible distortion. These Indicators in virtually all imaginable listening situations will rarely illuminate
The control circuit indicates a fault when one or more of the Overload Indicators glow continuously RED without
any input signal. You should switch the amplifier immediately off and contact your ROKSAN Authorized Retailer.
Multi-Amping The Loudspeakers
Operation
If the Loudspeakers utilise more than one drive unit with individual input terminals, for example a Tweeter and a
Woofer, then the loudspeaker performance will benefit from Bi-Amping. Dedicating one amplifier to the Tweeter
and another to the Woofer, isolates them from each other hence reducing distortion and increasing reserved
power. Speakers work far better with most amplifiers when Multi-Amped than using one yet more powerful
amplifier. Note: Bi-Wiring reduces the impedance seen by the Woofer and the Tweeter and is a first step towards
Bi-Amping.
If you suspect that your ROKSAN Caspian 5-Channel Power Amplifier is not operating properly, you should
check all the connections carefully. Below are some commonly encountered problems with suggestions for
possible cure. The list is not exhaustive: If you have any unresolved problems, please consult your appointed
ROKSAN dealer or distributor.
SYMPTOM LIKELY CAUSE SUGGESTED REMEDY
No power AC Mains lead not inserted properly
Unit not switched on at rear panel Ensure AC Mains lead is fully inserted
Switch unit on at rear panel
No output on one or more
channels Amplifier in stand-by mode (MODE light
RED)
Missing or bad input signal connection
Incorrect speaker connection
Over heating Press MODE button to set amplifier in
AUTO mode (AUTO light GREEN)
Check all input connections
Check all output connections on rear
panel
Allow amplifier to cool, increase
ventillation or use at lower volume
Hum from speakers Incorrect Grounding
Check Mains polarity and grounding on
all connected equipment
T R O U B L E S H O O T I N G C a s p i a n 5-Ch Amplifier
O P E R A T I O N C a s p i a n 5-Ch Amplifier
Roksan Audio ltd Caspian 5-Channel A/V Power Amplifier User Manual
CLASSIFICATION: General Use Version 2.01
All specifications are liable to change without notice. E&OE Page 7 of 9 ENGLISH