NAV-TV ZEN AVB-GM: GM IOS/IOT AVB to RCA, SPDIF & TosLink Sound Processor
NAV-TV
INTERFACING THE FUTURE
3950 NW 120th Ave, Coral Springs, FL 33065 TEL 561-955-9770 FAX 561-955-9760
Overview
The NAV-TV AVB-GM processor seamlessly converts GM's AVB bus to low-level (6 channel) RCA or TOSLink outputs. This aftermarket solution simplifies adding an amplifier to the OE BOSE IOS/IOT system. The plug-and-play kit integrates with various OEM data networks, retaining features like OnStar, door chimes, volume control, full fade and balance (analog only), treble, mid-range, bass control, and Bluetooth voice calls without requiring an external speaker for true OEM integration. Note: The OEM amplifier must be removed (or disconnected) from the vehicle to maintain proper functionality.
Kit Content
- USB Cable (updates): NTV-CAB009
- Power/Data Harness: NTV-HAR349
- ZEN AVB-GM Interface: NTV-ASY273
AVB-GM Overview:
The interface features:
- TosLink output
- Power/AVB connector
- LED status indicator
- USB (updates) port
- DIP switches
- REAR Analog OUT: Red (Right), White (Left)
- FRONT Analog OUT: Red (Right), White (Left)
- SUB/CENTER Analog OUT (mono): Red (Subwoofer), White (Center)
ZEN AVB-GM Compatibility (IOS, IOT radio with BOSE only)
| Year(s) | Make | Model |
|---|---|---|
| 2017+ | Cadillac | CTS, ATS, CT6 |
| 2019+ | Cadillac | ANY (except Escalade) |
| 2019+ | Chevy | Camaro, Silverado 1500 |
| 2019+ | GMC | ANY (except Yukon) |
AVB-GM Installation
IMPORTANT NOTE: Many GM vehicles have poor chassis grounding. Before connecting this interface, check the GROUND to the amplifier using a digital multimeter. If resistance (reference vehicle's battery negative) is greater than 1 OHM, run amp ground directly to battery or find a better ground source. Warranty will be VOID for the AVB-GM if damage is caused due to faulty ground(s).
Proper connection for the AVB-GM requires locating the OEM amplifier. Known locations are listed below:
| Vehicle | Radio Tuner Location |
|---|---|
| Cadillac ATS/CTS/XTS/XT4 | Trunk, passenger side panel |
| Cadillac CT6 | Trunk, driver's side floor |
| Cadillac XT5 | Driver under-dash, right of gas pedal |
| Chevy Camaro | Trunk, driver's side floor |
| Chevy Blazer, Equinox | Underneath front of center console |
| Chevy Corvette | Trunk floor, left of rear fuse block |
| Chevy Colorado | Behind Glovebox |
| Chevy Silverado/GMC Sierra | Behind rear seat, below rear window |
| GMC Acadia, Terrain | Underneath front of center console |
Wiring Connections:
- Connect to OE BOSE 16-PIN harness (brown)
- Connect to OE BOSE 16-PIN harness (black)
- Connect to Amplifier input (Analog RCA OUT: FRONT, REAR, SUB/CENTER)
- Connect to Digital TOSLink OUT
- Power connections: 12v (+) input, Ground (-) input, 12v (+) Remote OUT
Note: To avoid noise, connect power/ground with aftermarket amplifier power/ground.
AVB-GM System Layout Options
TYPE 1: Signal directly to amp, no additional external processor
This diagram shows the ZEN AVB-GM connected directly to an aftermarket amplifier, receiving signal from the OEM BOSE Amplifier harnesses.
TYPE 2: Signal to additional external processor, then to amplifier
This diagram shows the ZEN AVB-GM connected to an EQ/Processor, which then connects to an aftermarket amplifier, receiving signal from the OEM BOSE Amplifier harnesses.
OEM BOSE Amp Pin-Outs
Detailed pin-out information for the OEM BOSE amplifier connectors (X1, X2, X3, X4) is provided, listing pin number, size, color, circuit, function, terminal type ID, and option for various connections including speaker outputs, power, ground, and data communication.
AVB-GM Technical Specifications
Hardware & Software
- Current HW version: Version 1.0
- Current SW version: ZEN-AVBGM-1.1-7-11-13-19.enc
- Compatible SW (update) OS: Windows 7 (64 bit), 8, 10
INPUT
- Digital Input: AVB, GM-LAN
OUTPUT
- Digital Outputs: TosLink
- Digital Outputs supported: 24bit/48kHz
- Frequency Response (digital): 18Hz - 24kHz
- Analog Outputs: 6 channels (RCA)
- Output Voltage Peak: 3v (peak to peak, with EQ flat) or 6v (selectable)
- Output Voltage RMS: 2.1v
- Analog Output Type: Single-Ended
- S/N Ratio (analog): 112dB
- Frequency Response (analog): 18Hz - 24kHz
- THD+N @ -1dBFS: -93dB
- DAC: 192kHz/32bit
- DSP: 128bit/Channel Floating Point
- Delay (Time Alignment): none
Power Supply
- Current Consumption Stand-by: <1 mA
- Current Consumption Operational: 350 mA MAX
- Operational Voltage: 7V - 20V DC
- Amp Turn-On Output: Automatic
- Amp Turn-On Voltage: V-batt
- Amp Turn-On Current Limitation: 500mA
Other
- Dimensions: 4"x5"x1 3/8"
- Weight: 10 oz
- Country of Origin: USA
Tuning tips:
- Before beginning tuning process (especially with external EQ/Processors), set all HU settings for each source to flat.
- 1. Before beginning tuning process (especially with external EQ/Processors), set Bass & Treble on the head unit for each source to flat (0).
- 2. Begin with amplifier/EQ gains all the way down.
- 3. With dynamic music playing, adjust the radio volume to maximum.
- 4. Adjust the amplifier/EQ gains to desired maximum level.
Note: All doors should be closed during tuning and vehicle should be in Park (gear) to avoid alerts from door chimes/front or rear sensors, etc.
AVB-GM Pin Out
The AVB-GM unit has the following pin configuration:
| Pin # | Description | Color |
|---|---|---|
| 1 | --Empty-- | -- |
| 2 | --Empty-- | -- |
| 3 | --Empty-- | -- |
| 4 | GM-LAN | Green |
| 5 | --Empty-- | -- |
| 6 | Ground (-) | Black |
| 7 | AVB TX (+) | Orange |
| 8 | AVB TX (-) | White/Orange |
| 9 | --Empty-- | -- |
| 10 | --Empty-- | -- |
| 11 | Remote OUT | Blue |
| 12 | 12v Batt (+) | Yellow |
FAQ
- For installations with this AVB processor, make certain that any added amplifier's ground resistance (reference vehicle battery ground) does not exceed 1 ohm.
- NOTE: for Bluetooth media source, max volume occurs around 75%. This is a factory limitation and the ZEN AVB-GM duplicates this.
- If you've installed a third-party DSP (receiving signal from the AVB-GM, before the amplifier) and you're having issues with audio bleeding from one channel to another, echoing Bluetooth phone calls or any other signal processing issues, rule out the AVB-GM first by temporarily bypassing the third-party DSP and running signal directly from the AVB-GM to the amplifier(s) and verify the problem still exists before calling technical support.
