6
D-fend™ SA300 User Manual
Thermal Limits
D-fend incorporates built-in thermal protection circuitry which will temporarily disable the unit in the event that the
thermal limit has been reached or exceeded. Failure to mount the device in the recommended orientation will increase the
likelihood of reaching this limit (see Mounting Recommendation on page 17). Reaching the temperature threshold signifies
the SA300 is being subjected to extremes beyond what it is rated for, and/or that there is an issue with the protected
system or the system demands.
Weights and Dimensions
Weight
Width
Height
Depth
SA300 Unit Only
2.4 lbs / 1.09 kg
5.94 in / 15.09 cm
2.38 in / 6.05 cm
6.75 in / 17.15 cm
SA300 in Retail Carton
3.1 lbs / 1.41 kg
8.0 in / 20.32 cm
3.0 in / 7.62 cm
7.0 in / 19.05 cm
Terms and Definitions
All Pass – the entire audible spectrum: low, mid and high frequencies.
Attack and Release Times
Attack time – Determines how fast the D-fend processing engages after the signal has exceeded the threshold.
Setting the attack time to a short value will result in a fast response to peaks and will result in more obvious changes
in the output signal as the output is clamped to the threshold level.
Release time – This is the amount of time after the signal has dropped below the threshold level before the signal
returns to its unprocessed form.
Attack
Phase
Input Level
Threshold
Output Level
Time
Level
-3
0
+3
+6
+9
Release
Phase
Connect – Press this button in the Advanced Programming GUI software to connect the D-fend SA300 to your computer
unless you are using the set-up wizard (The wizard automatically connects the SA300 to computer.)
Enable – select this button to activate processing for the desired frequency range
Enclosure Type
Multi-way – indicates a full range system utilizing one or more speakers to cover the audio spectrum.
Subwoofer – indicates you have a system that only produces up to the first three octaves of music (20Hz—160Hz)
