Consistency in loudness is the single most important audio issue in broadcast. That is why DB8 and DB4 units are the most widely used digital transmission processor today.

Quite simply, they have set a new standard for real-time loudness control and format conversion.


  • Measure - LM6 Loudness Radar Meter
  • Correct - ALC6 Automatic Loudness Correction
  • Convert - Any Format for Any Platform


LM6 is the only loudness meter that will give you a 'complete loudness overview at a glance'.

In a single view, you can monitor Momentary Loudness, Loudness History, True-peak Level and two universal descriptors that reflect parameters of your choice - for example Program Loudness and Loudness Range (LRA).


If you measure the loudness of a 5.1 program, the results can differ significantly from a stereo or a mono downmix of the same program.

ALC6 introduces a new way of dealing with this issue: A 5.1 program may be adjusted based on what it measures in 5.1, or on what it measures using a specific set of downmix coefficients. 


DB4 and DB8 will help you convert between formats and platforms. Up-convert your stream from mono or stereo to e.g. 5.1, then corrcect loudness and downmix for different delivery platfiorms such as TV, iPod, YouTube, etc.

If you deliver for different platforms, UpCon HD and Downconvert 5.1 will help you making this process a breeze. 

Dual Redundancy

We have made sure that DB4 and DB8 will never let you down. With thousands of units operating constantly all over the world, there is plenty of proof that they rarely fail. The level of operational safety is simply unrivaled and the result is the ultimate level of redundancy.


  • Dual Power - For Independent Power Sources 
  • Dual Fuses - Double up on fuses
  • Dual Fans - Two Swiss-made Pabst Fans


DB4 and DB8 come fully loaded with a wide range of tools designed specifically to manage your audio stream, measuring loudness at input and output stages, correcting, converting and more. These pristine tools are what make DB4 and DB8 unparalleled for TV Transmission at any level.



Complete loudness overview at a glance, including Loudness History, Momentary Loudness, True Peak Level and universal descriptors that can show e.g. Program Loudness, Loudness Range.

Learn More About LM6


Automatic Loudness Correction Processor delivering high-resolution, low-latency loudness control in a world full of level jumps between programs.

Learn More About ALC6


Downmix, loudness-process and true peak limit any mono, stereo or 5.1 source. Input formats are detected automatically.

Learn More About DMix

MDX 5.1

High-resolution dynamics processor for multichannel signals. This algorithm gives you a sophisticated approach to dynamic range control.

Learn More About MDX 5.1

UpCon HD

Let UpCon HD monitor your audio and if the signal falls back from 5.1 to stereo, it seamlessly cross-fades into a convincing 5.1 surround up-conversion.

Learn More About UpCon HD


Loudness Control, Level Optimize and Peak Limit your audio stream. You can even configure to Stereo, Wide Stereo or Dual Mono.

Learn More About ATX/DTX

Multiband 5.1

4-band dynamic control for 5.1 signals. Integrate processing not possible to obtain using multiple stereo dynamic processors.

Learn More About Multiband 5.1

Downconvert 5.1

Downconvert multi-channel formats to LCRS, Stereo or Mono mixes. You can also extract or distribute LFE(Sub) channels to and from the 5.1 main Input channels.

Learn More About Downconvert 5.1

EQ/Delay 8

State-of-the-art multi-channel EQ and Delay that gives you flexibility to cover several different applications and I/O-format setups.

Learn More About EQ/Delay 8

Keeping You Up To Date

We have been listened to by those actively setting broadcast standards - we've even donated our technology to many of the same international bodies that impact your broadcast work.  

Legislation on loudness in television is constantly evolving.  However, regardless of your location and no matter which TC Electronic Loudness units you use, we will always help you remain compliant with the latest revision of the broadcast standard that impacts your work.


5 Year Warranty

DB4 and DB8 units have been serving 24/7 all over the world for years and years, and with the dual redundancy scheme, you can rest assured that down time is a thing of the past. That is also why we offer an unrivalled 5-year hardware warranty on DB4 and BD8. 

I/O Options

DB4 and DB8 both handle up to 16 audio input and 16 audio output channels. There are two slots available, and you can choose any combination of SDI, AES/EBU unbalanced or AES/EBU balanced.

The SDI card for DB4 and DB8 supports all commonly used SD and HD formats. While de-embedding and embedding 8 channels of audio (48 kHz, 24 bit), selectable from the four SDI Groups in chunks of four audio channels, it passes the video side untouched.

Processing may be inserted on any two of the four SDI Groups, and re-embedding may take place on any two groups. Consequently, the machine enables cross patching of audio and format conversion between SDI Groups. The design features two separate SDI inputs, of which one is active at a time, and two parallel, separately buffered outputs.

The DB's present an attractive SDI solution with massive jitter rejection, 48 bit processing and low latency. They also feature bit transparent, synchronous data handling, enabling routing of data reduced audio, such as AAC, DTS or Dolby E. Two SDI cards can be mounted, processing up to 16 audio channels.

The DSP6000 SDI card (bypass version) features automatic bypass at power-down or at loss of power. Even at boot-up audio and video will be passed lossless to transmission.

HD Audio

  • Embedded audio multiplexer and demultiplexer
  • Supports 38 HD video formats
  • Supports eight audio channels at one time
  • Fully SMPTE 299M compliant & compatible with common non-compliances
  • Up to eight bit errors can be corrected in each audio data packet
  • Full support for 48 kHz synchronous or asynchronous 16-bit, 20-bit and 24-bit audio
  • All four audio groups can be deleted
  • Any two audio groups can be replaced when operating in multiplexer mode

SD Audio

  • Embedded audio multiplexer and demultiplexer
  • Supports 6 SD video formats
  • Supports eight audio channels at one time
  • Compliant to SMPTE 272M A and C & compatible with common non-compliances
  • Full support for 48 kHz synchronous 16-bit, 20-bit and 24-bit audio
  • Programmable audio sample distribution
  • All four audio groups can be deleted
  • Any two audio groups can be replaced when operating in multiplexer mode

AES/EBU BNC, Coax, unbalanced with hardware bypass
The AES/EBU BNC (coax) card features 8 unbalanced I/O channels. With 8 BNC connections it is especially designed for broadcast installations as they often prefer the 75 Ohm unbalanced BNC connections that support considerably longer cables. At power off the frame is hardwire-bypassed via relays ensuring no signal loss whatsoever.

AES/EBU SUB-D, balanced
The AES/EBU SUB-D card provides 8 channels of AES/EBU digital inputs and outputs. Interfaces have a characteristic impedance of 110 Ohm, and the card comes with a DB25 to multiple XLR breakout cable.

Remote Control

Up to 8 mainframes can be controlled via the TC ICON Hardware Remote, but DB4 and DB4 units are most often controlled via a PC or Mac using the free TC ICON Software Editor.

When using up to four instances of the TC ICON Software Editor, no less than 32 frames can be controlled simultaneously.

Learn More About TC ICON Remote Control...

CCTV Installs 100 DB8 MKII

CCTV News Img

CCTV has more than a billion viewers and five control rooms each capable of handling 10 TV channels. The audio of all these channels is managed by DB8 MKII TV Transmission Processors. "We have inserted the DB8 MKII units into the signal chains of our broadcasting system and use them for loudness measuring as well as real-time loudness correction and upconversion from stereo to 5.1," says Jiang Ming, chief broadcast engineer at CCTV. "The units are used in live broadcast transmissions, so reliability is absolutely key. Another important factor is that we want to control the loudness of the programs we broadcast, but at the same time we do not want to sacrifice the audio quality. We brought in a lot of different processors and carried out comprehensive tests, and ultimately the DB8 MKII units proved to perform the best."


Learn More About the CCTV DB8 MKII Installation

Loudness Authority logo 2016

Loudness Website

Keeping track of the multitude of issues around loudness can be a challenge. That's why we've created a one-stop dedicated loudness website where you'll find critical information on the most important issues.

The site is an answer to the highly relevant question:
"What Is Loudness, and Why Is It Important?"

Visit the Loudness Website

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In the Press

There's a reason that world-leading broadcast magazine regularly invite us to share our knowledge: we've been pioneers in the digital audio world since 1985.

We've taken part in research studies and the definition of international broadcast standards right from the start, donating technology which has become a crucial part in new, open international standards.


Read The Articles Here

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