Metra Interfaces for European Cars, Tesla DSP Details

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Metra Tesla DSP

Axxess by Metra announced eight new interfaces for MOST25 amplified factory radios for several European car makers.  And it also announced details on its Telsa DSP.

On display at the SEMA show this week, the MOST25 interfaces provide accessory 12-volt power, parking brake, reverse, and speed sense NAV outputs.  They retain audio controls on the steering wheel and are micro “B” USB updatable.

New applications include the following vehicles:

  • 2004-2013 BMW 1 Series and 3 Series
  • 2006-2012 Land Rover and Range Rover
  • 2005-2009 Land Rover 3 and Range Rover Sport
  • 2003-2008 Mercedes CLS, E, and SLK
  • 2006-2011 Mercedes GL, ML, SLK, and E
  • 2002-2007 and 2007-2010 Porsche Cayenne
  • 2004-2009 Porsche 911, Boxster, and Cayman

Axxess’s new DSPL and DSPX packages include applications for 2021 and up Teslas with amplified systems and select GM vehicles.  The Tesla package is one of the first of its type in the industry for the brand.  The DSP units include amplifier bypass harnesses and they combine digital signal processor and data interfaces.

The DSPs are designed to integrate with factory audio systems and retain factory chimes and voice prompts. Axxess’s DSPL series provides six channels of output and a 15-band graphic EQ per channel, while the DSPX series has 10 channels of output and a selectable 31-band graphic EQ or 5-band parametric EQ per channel. They both have selectable crossover slopes, independent equalization for each output, and the ability to read, write, and store configurations for future recall.

All tuning is done via an Axxess app over Bluetooth for smartphones and tablets.


Other new Metra Axxess products are as follows:


Total Control Interfaces               

Two new interfaces have been added to Axxess’s Total Control Series, designed for use when replacing the radio in the 2009-2016 Porsche and the 2016-up Mercedes. The interfaces automatically detect the vehicle type, radio connection, and preset controls while allowing the ability to dual-assign steering wheel controls. They provide wires for multimedia radios (parking brake, reverse, speed sense), accessory power, a 12-volt illumination output, as well as wires for retaining R.A.P., balance, and fade. The Axxess Total Control Series works with all major radio brands. It can be manually programmed for most vehicles and retain memory settings even after battery disconnection or interface removal.


Backup Camera Retention Interface

Axxess will also display a new backup camera retention interface for the 2008-2015 Volkswagen. This plug and play interface allows the factory camera to be used with an aftermarket radio.


Pioneer Radio Interfaces

Axxess is introducing various vehicle-specific interfaces at SEMA for installing select Pioneer radio models. With these interfaces, vehicle information and settings controlled on the factory screen are retained, displayed, and controlled on the Pioneer touchscreen. These displays, such as HVAC functions, would otherwise be lost after replacing the head unit.


The built-in integration technology from Axxess also retains safety chimes through an included offboard speaker, retains audio controls on the steering wheel, retains R.A.P. (Retained Accessory Power), and provides 12-volt 10-amp accessory power and NAV output for parking brake, reverse, and speed sense.


The interfaces allow for auto stop/start override, if equipped, and the retention and adjustment of the OE Personalization Settings. Total Control interfaces have plug-n-play connectivity, and a radio antenna adapter and an antenna adapter for GPS are included. New interfaces launching at SEMA include applications for:

  • 2013-Up Chrysler
  • 2021-Up Chrysler
  • 2010-2017 GM
  • 2014-Up GM
  • 2019-Up GM
  • 2011-Up Ford
  • 2020-Up Ford
  • 2015-Up VW

OnStar® Retention Interfaces

Two new interfaces will debut at SEMA designed specifically for the 1997-2005 Cadillac with amplified systems and the 2004-2007 Saturn with non-amplified audio systems. These interfaces will retain OnStar functionality, chimes, balance and fade, and R.A.P. (retained accessory power). They also provide NAV outputs, including parking brake, reverse, speed sense, and 12-volt 10-amp accessory power.


Turn-on Interface

The AXTO-MAX interface is designed to fit 2016-up* Nissan Maximas with amplified systems. Interfaces from this series are intended for vehicles that require a data signal to turn on OEM amplifiers, retain rear seat entertainment, and more. This new interface will retain the factory backup camera, the audible parking sensor warning, the factory AUX-IN jack, and balance. It also provides accessory power (12-volt 10-amp) and wires for multimedia radios (park brake, reverse, speed sense). This interface can be paired with the AXSWC steering wheel control interface (sold separately), and a pre-wired AXSWC harness is included.


Add-a-Sub Interfaces

Various new interfaces from Axxess’s Add-a-Sub series will be introduced at SEMA to fit select Chrysler, Ford, and GM vehicles. These interfaces have 2-channel non-fading 5V RMS output, a fixed low pass frequency of 234Hz, and 250mA remote turn-on output. There are options designed for amplified and non-amplified vehicles, and a bass knob & vehicle-specific harness are included. New applications to be displayed at SEMA include:

  • 2007-2018 Chrysler
  • 2013-Up Chrysler
  • 2007-2017 Ford
  • 2013-2021 Ford
  • 2022-Up Ford
  • 2014-2019 GM
  • 2014-Up GM
  • 2019-Up GM
  • 2021-Up GM
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