Thank you for having the manual I needed for an older model Aiwa stero I had found on Ebay --- I wanted the Aiwa because I had tapes and cd's but I did not have a manual as to how to operate the system... I found what I needed and it has enabled me to set the system up for my enjoyment.
I wished detailed information of the JBL S310 and here I found it! Very happy with the service from this site!
Text excerpt from page 9 (click to view)
INDICATORS & POSITIONING
Indicators
On the front you will find 2 diodes. These are positioned just above the Dynaudio Logo. The woofer channel has a built in limiter that protects the woofer unit from too much excursion. It works by reducing the gain of the circuit when a certain threshold level is reached.
Positioning
The BM 5A is designed as a near to mid-field monitor and can be equally well used in both stereo and surround setups. Optimal performance is achieved when positioned 1-3 meters from the listener. It can be placed on stands or on the meter bridge of a console provided that the meter bridge is sufficiently sturdy. For best results the speakers may be aimed towards the listener in both vertical and horizontal planes. Note: Be aware that proper air circulation around the monitor for sufficient cooling is necessary. Also notice that the heat sink is designed to provide maximum cooling when the monitor is positioned vertically.
The green power diode indicates speaker on/off status. Green indicates; �power on�. The second diode has two functions. This will light up orange when the input signal reaches a level where the limiter is activated to prevent the internal bass amplifier from clipping. And it will light up red when the amplifier gets too hot. At the same time the monitor will be muted, in order to reduce the temperature.
Protection
The BM 5A monitor has several built in protection systems to reduce the risk of hazard or damage due to overloading. Both power amplifiers have thermal protection. This activates if a problem should occur, and helps protect both the electronics and the loudspeaker drivers. There is also a thermal sensor measuring the temperature on the heat sink. An electronic circuit will mute the signal when too high temperature is reached. The protection diode on the front will light up when this happens. On the tweeter output there is an overload protection to prevent burning the tweeter driver in case of overloading. This circuit will mute the tweeter signal if too much current is fed to the tweeter. 7
