800W Full-Range 8-Channel Class D Amplifier
with Integrated DSP
with
CONNECTION GUIDE
5.53 in
141 mm
1
2.12 in
54 mm
Thank you for purchasing a JL Audio amplifier for your sound system.
Your amplifier has been designed and manufactured to exacting standards in order to ensure years of musical enjoyment. For maximum performance, we highly recommend that you have your new amplifier installed by an authorized JL Audio dealer. Your authorized dealer has the training, expertise and installation equipment to ensure optimum performance from this product. Should you decide to install the amplifier
yourself, please take the time to read this manual thoroughly to familiarize yourself with its installation requirements and setup procedures.
If you have any questions regarding the instructions in this manual or any aspect of your amplifier’s operation, please contact your authorized JL Audio dealer for assistance. If you need further assistance, please contact the JL Audio Technical Support Department at technical@jlaudio.com or call (954) 443–1100 during business hours.
Installation Applications
This amplifier is designed for operation with 12 volt, negativeground electrical systems. Using this product in systems with positive ground and/or voltages other than 12V may result in damage to the product and will void the warranty. This product is not certified or approved for use in aircraft.
Product Description
This is a eight-channel, full-range Class D amplifier equipped with the second generation of JL Audio’s NexD2™ high-speed switching technology. It is engineered to deliver reference-grade audio amplification with outstanding efficiency and unprecedented, built-in processing power. Instead of traditional analog processing controlled by knobs and switches, VXi amplifiers feature an integrated DSP (Digital Signal Processor). The amplifier and its integrated DSP are configured using an external device (PC, Tablet or Phone), with the appropriate JL Audio TüN™ application installed. (See What is TüN? section for more info.)
Planning Your Installation
It is important that you take the time to read this manual thoroughly and that you plan your installation carefully. It is very easy to damage
expensive vehicle systems in modern automobiles. Never assume that you have found appropriate wires without consulting a reliable wiring diagram or without analyzing with proper test equipment. If you are uncomfortable or unfamiliar with reading diagrams or testing methods, please enlist the services of your authorized JL Audio dealer to perform the installation. Your authorized dealer has the training, expertise and installation equipment to ensure optimum performance from this product. The following are some considerations that you must take into account when planning your installation.
10.22 in
260 mm
6.62 in
168 mm
11.32 in
287 mm
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Safety Considerations
•Install your amplifier in a dry, well-ventilated location that does not interfere with your vehicle’s safety equipment (air bags, seat belt systems, ABS brake systems, etc.).
•Do not mount the amplifier in the engine compartment or in any areas of extreme heat.
•Securely mount the amplifier so that it does not come loose in the event of a collision/sudden jolt or as a result of repeated vibrations during normal operation.
•Check before drilling to make sure that you will not be drilling into a fuel tank, gas/brake line, wiring harness, or other vital system.
•Do not run system wiring outside or underneath the vehicle/vessel. This is an extremely dangerous practice, which can result in severe damage/injury.
•Take the necessary precautions when making connections to the vehicle’s battery.
•Protect all system wires from sharp edges by carefully routing them, tying them down and using grommets and loom where appropriate.
•Secure all wiring as needed, using cable ties or wire clamps to protect them from moving parts and sharp edges.
Cooling Efficiency Considerations
The outer shell of your JL Audio amplifier is designed to remove heat from the amplifier circuitry. For optimum cooling performance, this outer shell should be exposed to as large a volume of air as possible. Enclosing the amplifier in a small, poorly ventilated chamber can lead to excessive heat build-up and degraded performance. If an installation calls for an enclosure around the amplifier, we recommend that this enclosure be ventilated with the aid of a fan. In normal applications, fan-cooling is not necessary. If mounting the amplifier under a seat, make sure there is at least 1 inch (2.5 cm) of space above the amplifier’s outer shell to permit proper cooling.
What is Included
(1) |
Amplifier |
(1) |
Power Connector |
(1) |
Analog Input/Pre-Out Harness |
(2) |
Speaker Output Harnesses |
(1) |
JL Audio Badge |
(4) |
Corner Caps |
(1) |
USB A/B Cable (6 ft./1.8 m) |
(1) |
Corner Cap Tool |
(2) Black Hex Cap Machine Screws |
(1) |
2.5 mm Hex Wrench |
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(2) Silver Thumbscrews |
(1) |
3 mm Hex Wrench |
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(1) Connection Guide |
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JL Audio Badge
To complement the amplifier’s mounting orientation, the logo badge includes a recessed key feature allowing it to be affixed at 90 degree increments on the amplifier’s top. To install, remove the adhesive backing and press the badge at the desired orientation.
1 Power Connector
The VX800/8i’s“+12 VDC” and“Ground” connections are designed to accept up to 2 AWG copper wire. Note: Copper Clad Aluminum (CCA) wire is not
Arecommended. . 4 AWG is the minimum copper wire size for this amplifier.
B.
C.
D.
2
The Analog Input Harness accepts the following connections:
Line-Level Analog Inputs: Eight female RCA jacks feed a differentialbalanced input section, providing a high degree of input flexibility, and retaining superior noise rejection. This type of input architecture also allows the VX800/8i to cleanly accept any analog audio signal up to 16 VRMS, without using a line-output converter.
Preamp Outputs: Two female, RCA jacks deliver line-level, analog audio outputs (Max 4 V RMS) that are compatible with most types of aftermarket equipment. These are configured with the TüN™ Software Interface.
Remote: This connection provides a positive (+12V) turn-on voltage (475 mA limit) to activate other aftermarket equipment (similar to an aftermarket head unit’s remote turn-on lead).
Valet: When connected to negative ground, this connection activates the Valet Mode Preset and will remain active until the ground connection is removed. This preset is configured using the TüN™ Software Interface and will override any DRC controlled preset.
Corner Cap Installation and Removal
The corner caps are designed to conceal the amplifier’s mounting holes and hardware. To install, simply press a corner cap into each mounting hole. To avoid scratching the amplifier’s chassis during removal, use the included, plastic corner cap tool and lift below each cap.
Making Connections
VXi amplifiers utilize removable plugs and harnesses to make the following connections:
•Power Connector
To connect the power, ground and remote turn-on wires to the amplifier, back out the set screws on the connector using the supplied hex wrenches. Strip back 3/8 inch (10 mm) of insulation from the end of each wire and insert the bare wire into the receptacle on the power connector plug, seating it firmly so that no bare wire is exposed. While holding each wire in place, tighten each set screw firmly, taking care not to strip the head of the screw. Install the power connector by plugging it into the amplifier’s power connector receptacle, pushing firmly.
•Analog Input/Pre-Out Harness
This harness includes connections for Signal Input (RCA plugs), Preamp Outputs (RCA plugs), Remote Turn-On Output (wire lead) and Valet Input (wire lead). Select either the included black hex cap machine screws or the silver thumbscrews to secure the Analog Input Harness connector to the amplifier.
•Speaker Output Harnesses
These harnesses have output wire leads to connect with speaker cables.
Turn-On Mode
VXi amplifiers can be switched on and off using one of three methods, configured by the “Turn On Mode” setting in the TüN™ Software Interface. Refer to the table below for detailed info and decide which option is best suited for your specific system.
Setting |
Mode |
Function |
Connection |
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Connect your source unit’s |
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Remote |
Conventional |
Turn-on/off controlled by your |
+12V remote turn-on output to |
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(Preferred) |
source unit. |
the Power Connector’s Remote |
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Turn-On Input connection. |
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Automatically turns on by |
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DC |
DC Offset |
detecting the presence of small |
This circuit senses the Analog |
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Sensing |
DC signal in OEM audio outputs |
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Offset |
Input 1 only. Note: The sensitivity |
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(Auto) |
and turns off (within 5 minutes) |
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of this circuit is designed for |
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after the signal is removed. |
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high-level (speaker level) signals, |
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Automatically turns on by detecting |
not for low-level (preamp level) |
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signals. Make sure the OEM |
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Signal |
full-range OEM audio signals and |
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audio outputs contain midrange |
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Signal |
Sensing |
turns off (within 5 minutes) after |
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signals. |
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(Auto) |
the signal is removed (varies, |
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depending on input signal levels). |
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3 Speaker Output Harnesses
Connect the speaker output leads to the corresponding speaker wires.
4 JLid-COMM
Connect optional accessories (VXi-BTC, VXi-HUB, etc.) to this port.
5 JLid-CTRL
Connect optional DRC (Digital Remote Controller) wired controllers to this port.
6 SD + Reset
Lift the dust cover to access the following utility functions:
Reset Buttons: Use a small pin to perform the following: Reboot Amp - Press and release the right button.
Factory Reset (wipe memory, reboot amp) - Press and hold the left button for 7 seconds.
Micro SD Slot: For service/future expansion.
7 USB
This USB A/B port permits connection to a computer for configuration and tuning, using the TüN™ Software.
8 DIGITAL-In
Toslink port accepts 2-channel digital audio signal from any optical (S/PDIF) digital output, with a sample rate up to 192 kHz.
9 DIGITAL-Out
Provides a digital audio output (24 bit/96 kHz) that is not susceptible to RF interference or noise-generating electrical conditions. By default, this is a pass-through audio output, with no signal processing applied, and intended for use with other equipment that have an optical (Toslink) digital audio input (S/PDIF) port. Using the TüN™ Software Interface, you may configure this output’s routing, equalization, output level and DRC control functionality.
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