Earthquake Sound Power Supply Connections, Power-SupplyConnections, TUNING BP112, Controls

POWER SUPPLY CONNECTIONS

	HI INPUT			LOW	Power-Supply Connections
					Positive: Connect a wire (at least 12-gauge)
L+			R+	INPUT
				L	between the vehicles +(positive) battery
L-			R-	R	terminal and the "+12V" connection on BP112
					amplifier. You must install a fuse holder with a
		Bass			50-75A fuse, within 18" of the battery. Route
Level		Boost		LPF	the power wire through a grommet in the
					vehicle's firewall. If there is not factory
Min	Max	Min	Max 50Hz 300Hz		grommet available, you must install one.
Remote		Subsonic		Phase Shift	Negative: Connect a wire (at least 12-gauge)
	ON		ON	0
	OFF		OFF	180	between the -(ground) connection on BP112
					amplifier and a bare metal surface near the
		Power Thermal OC DC			mounting location. You may need to scrape
				Protection	away some paint from the metal surface to
BASS					insure a good connection. Use a screw and a
EXT
					lock (star) washer.
REM	GND +12V		Fuses
					Remote: Connect a wire (usually blue)
					between the remote terminal on BP112 and
POWER			15A	15A	the remote output wire on the back of your
					head unit (deck). This wire should provide
					between +5VDC and +12VDC when the unit

is on and no voltage when the unit is off.

Note: If your head unit provides preamp outputs it will have remote wire. If your radio provides only high-level outputs, it may not have a remote wire. If you will be using the high level outputs from your head unit, you do not need to connect the remote output. The speaker level inputs will sense voltage on the speaker wires and BP112 will turn itself on. If you are using only lin-level (RCA) inputs, you must connect the remote wire to the BP112.

Input Connections:

Note: BP112 is equipped with two line level (RCA) inputs and four high level inputs. Any combination of high-level and speaker-level inputs may be used to provide nonfading bass when connected to a head unit with four outputs.

Head units with dedicated subwoofer outputs (line level): Connect the

subwoofer output form the head unit to line-level inputs.

Head units with four line-level (RCA) outputs:

Connect the four high-level outputs to the four high-level inputs on the BP112.

TUNING BP112

BP112 provides several controls that simplify sonic integration with virtually any vehicle’s unique acoustic properties. Please read the following section carefully to familiarize yourself with the function of each control.

Controls

Level: The Level control is a rotary knob on the panel with the electrical connections. This switch will line match the voltage of your head unit, which will deliver high sound quality and performance.

Bass Boost: BP112’s interaction with the acoustics of your vehicle may produce a peak or dip in BP112’s response. For the vast majority of vehicles, these peaks or dips occur at about 40Hz — around the frequency of a low bass guitar note. Use this control to correct that peak or dip. Adjustment between –6dB and +3dB is possible. Although response without any sharp peaks or dips is technically correct, you may choose the position that best suits your taste.

LPF: The low-pass filter, blocks unwanted high frequencies to allow cleaner low- frequencies.

Gain Control / Remote Gain: This control will adjust the input sensitivity of BP112. Use this control to adjust the relative volume (loudness) of BP112 with respect to the other speakers in the vehicle. To use the remote gain control you must set the main gain to it's max level, then adjust the remote gain to your preference. Note: If the main gain is not set to max then it will limit the usability of the remote gain. Also be sure to make sure that your system is turned OFF while executing this process, so that you do not damage your amplifier or subwoofer.

Subsonic: BP112’s interaction with the acoustics of your vehicle may produce a peak or dip in BP112’s response. For the vast majority of vehicles, these peaks or dips occur at about 40Hz — around the frequency of a low bass guitar note. Use this control to correct that peak or dip. Adjustment between –6dB and +3dB is possible. Although response without any sharp peaks or dips is technically correct, you may choose the position that best suits your taste.

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	www.earthquakesound.com	Specifications Are Subject To Change Without Notice