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Kramer VM-4UX

1:4 4K 12G SDI Distribution Amplifier

Max bandwidth 12Gbps

£529 (£634.80 inc. VAT)
Availability: In stock

Kramer VM-4UX (10-80441090)

The Kramer VM-4UX is a compact and high performance 1:4 4K distributor for standard broadcast-grade SDI signals of up to 12G transmitted data rate. It auto-adapts to the data rate of one SDI input signal, equalizes and re-clocks the signal to improve transmitted signal reach, and distributes the signal to four identical SDI outputs.

Kramer VM-4UX Key Features

  • Reliable Wire Connectivity — Coaxial broadcast-grade cables are reliably connected via lockable BNC connectors, preventing unintentional wire disconnections, to gain fast and highly professional uncompressed SDI signals distribution deployments.
  • Extended-reach Input Extension — Input signal equalization and output signals reclocking to gain extended-reach signal extension. Using Kramer high-quality coaxial SDI cables, supports extension of up to 300m (984ft) for SD signals; 200m (656ft) for 1.5G HD signals; 100m (328ft) for 3G and 6G HD signals; 80m (262ft) for 12G 4K signals.Note: Reach depends on signal resolution, and quality of copper cable used. Reach extension performance may vary while using non-Kramer coaxial cables.
  • Transmitted Data Rate — Auto-adapting from 270Mbps to 12Gbps data rates.
  • Compliance — Complies with SMPTE 259M (SD-SDI), 292M (HD-SDI), 344M (ED-SDI), 424M (3G HD-SDI), ST-2081 (6G-SDI) and ST-2082 (12G-SDI) standards.
  • Max. Resolution — 4K@60Hz (4:2:2) 30bpp.
  • SDI Signal Transmission — SDI, HD-SDI, 3G HD-SDI, 6G and 12G SDI compliant signals, supporting pass-through of standard embedded audio channels with ancillary ID and metadata information.
  • LED Indicators — Status indicators for transmitted SDI data rate of input and output connected signals, and power indicator, for ease of maintenance and troubleshooting.
  • Easy Installation — Compact DigiTOOLS fan-less enclosure for small footprint spaces and over-ceiling mounting, or side-by-side rack mounting.
  • 7 year warranty (Click Here for details)
  • Order Code: 10-80441090

Kramer VM-4UX Downloads

Play Kramer VM-4UX Video VM-4UX Product Video

Kramer VM-4UX Specifications


Inputs 1 × SMPTE 259M (SD-SDI), 292M (HD-SDI), 344M (ED-SDI), 424M (3G HD-SDI), ST-2081 (6G-SDI) and ST-2082 (12G-SDI) compliant serial video, 75Ω on a BNC connector
Outputs 4 × equalized and reclocked SMPTE 259M (SD-SDI), 292M (HD-SDI), 344M (ED-SDI), 424M (3G HD-SDI), ST-2081 (6G-SDI) and ST 2082 (12G-SDI), outputs 75Ω on BNC connectors

Video Specifications

Cable Equalization Reach 12Gbps: Up to 80m (260ft), 3Gbps and 6Gbps: Up to 100m (330ft), 1.5Gbps: Up to 200m (660ft), SD: Up to 300m (980ft), Note: The above specs apply when using Kramer cables
Video Up to 4K@60Hz (4:2:2) 30bpp resolution, 270Mbps to 12Gbps data rate
Maximum Output Level 800mVpp /75Ω
Coupling AC
Standards Compliance SMPTE 259M (SD-SDI), 292M (HD-SDI), 344M (ED-SDI), 424M (3G HD-SDI), ST-2081 (6G-SDI), ST-2082 (12G-SDI)


Power Supply 5.2V/4A
Consumption 5V DC, 250mA
In The Box VM-4UX, Power supply, mounting bracket, 2 male BNC 75Ω terminators
Product Dimension 12.00×7.15×2.44cm (4.72×2.81×0.96") W×D×H
Product Weight 0.2kg (0.4lbs) approx.
Shipping Dimension 23.20×12.00×8.90cm (9.13×4.72×3.50") W×D×H
Shipping Weight 0.7kg (1.5lbs) approx.


Operating Temp. 0° to +40°C (32° to 104°F)
Storage Temp. -40° to +70°C (-40° to 158°F)
Humidity 10% to 90%, RHL non-condensing

Replacement Power Supplies

ProductDescriptionPriceInc. VAT
Kramer VA-102P5 10-Output 5v DC/18A Power Supply (Max 1.8 Amp per channel) £440 £528.00

Kramer VM-4UX Compatible Products

Product CodeDescriptionPriceInc. VAT
Kramer RK-3T-B Rack Adapter 3 × Tools new shape and black colour £78 £93.60

Kramer VM-4UX Optional Cables

DescriptionLengthPriceInc. VAT
Kramer C-BM/BM-1.5 1.5ft SDI/HD-SDI COAX with BNC connectors 0.5m £7 £8.40
Kramer C-BM/BM-3 3.0ft SDI/HD-SDI COAX with BNC connectors 0.9m £10 £12.00
Kramer C-BM/BM-6 6.0ft SDI/HD-SDI COAX with BNC connectors 1.8m £12 £14.40
Kramer C-BM/BM-10 10ft SDI/HD-SDI COAX with BNC connectors 3.0m £14 £16.80
Kramer C-BM/BM-15 15ft SDI/HD-SDI COAX with BNC connectors 4.6m £18 £21.60
Kramer C-BM/BM-25 25ft SDI/HD-SDI COAX with BNC connectors 7.6m £16 £19.20
Kramer C-BM/BM-35 35ft SDI/HD-SDI COAX with BNC connectors 10.6m £22 £26.40
Kramer C-BM/BM-50 50ft SDI/HD-SDI COAX with BNC connectors 15.2m £29 £34.80
More Cables for the Kramer VM-4UX

Kramer VM-4UX Possible Alternatives

Product CodeDescriptionPriceInc. VAT
AJA 12GDA 1:6 12G/3G/HD/SD SDI reclocking distribution amplifier 1 × BNC input; 6 × BNC outputs Formats100 Mbps - 12 Gbps, format agnostic outputs; Max. 90m @ 4K £582 £698.40
AJA 3GDA 1:6 3G/HD/SD SDI reclocking distribution amplifier 1 × BNC input; 6 × outputs; Max. 120m @ 1080p £468 £561.60
AJA HD5DA 1:4 HD-SDI/SDI distribution amplifier £238 £285.60