SET UP ADJUSTMENTS
Your RTA enclosure uses several controls to provide sonic integration with virtually any vehicles
unique acoustic properties. Please read the following section carefully to familiarize yourself with
the function of each control.
The following adjustment sequence is recommended to properly tune your RTA enclosure. By first
adjusting the GAIN, the LPF, then the PHASE switch, followed by the BASS EQ (in this order) will
give you the best results.
Input GAIN Control
This control allows you to match the input level of the amplifier to the output level of your head unit
(Fig 6). Matching the input can be accomplished in four simple steps:
1. Make sure the remote gain control is not plugged in until after the master gain control is set.
2. Set the GAIN control on the amplifier to MIN (completely counter clock wise).
3. Turn on the head unit and adjust the volume to 2/3 maximum, and set the BASS and TREBLE
on the radio (source) to zero or flat.
4. Turn the GAIN control clockwise until the sound just begins to distort, then back off slightly to cut
distortion and operate at optimum gain.
Remember, the GAIN control is not a volume control. Ignoring these four steps above may leave you
with a damaged woofer and/or damaged amplifier.
LPF (Low Pass Filter) Crossover Adjustment
Since musical tastes vary, adjust the crossover by ear while listening to the music of your choice.
Turn the crossover LPF adjustment all the way down to 50Hz. Then slowly turn the knob up until
desired sound is achieved. Normal listening level should be right around 100Hz to 150Hz. Use
common sense when adjusting the crossover. When properly adjusted, the bass from the RTA
enclosure should blend in with the rest of your speakers and not overpower the music. Be sure to
set the tone controls of your radio (source unit) to flat while dialing in the crossover. (Fig 7)
Fig.6 GAIN Control
GAIN
MIN
MAX
Fig.7 Low Pass Control (LPF)
50Hz
LPF
200Hz