The Key Smart Amplifier Test Tones
Test tones for use with the Key 180.4 smart amplifier:
KXA Amplifier GAIN MATCHING
Input Gain Control with Gain Matching: The input gain control is not a volume control. It matches the output of the source unit to the input level of the amplifier and features Gain Matching to prevent clipping the input. For a quick setup, turn the source unit up to about 3/4 volume (if the source unit goes to 30, turn it to 25). KICKER recommends using these test tones to reach the most accurate and best performing settings. Next, slowly turn (clockwise) the gain on the amplifier up until you see the Gain LED light up or hear audible distortion, then turn it down a little. If the GAIN knob’s backlight comes on, the input is still clipping.
In any audio system, the goal is to reach maximum input and output levels without distortion or clipping. The engineers at KICKER have taken the guesswork, and hassle, out of matching the output voltage of your source unit to the amplifier with the Gain Matching feature. To begin, you’ll need to download the KICKER test tones:
These test tones are sine waves meant to provide a consistent signal for the KX amplifier to reference. The different recording levels are designed to give you the perfect gain match for your application.
Afterwards, use the following procedure to accurately Gain Match your amplifier(s):
All level matching circuitry in the KX amplifiers is at the beginning of the signal chain. If you are going to use features like bass boost, SHOCwave or EQ settings, it may be necessary to readjust the gain to a lower setting to compensate for increased output at those frequencies.
Once the amp and source unit are level matched, you will want to make certain you are not overdriving your speakers. Use the following procedure:
Likewise, you can use the CLIP indicator feature of the KXARC remote to easily identify which amplifier’s output is clipping and when.