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Super Digital Delay Line

The SDD3 is a true technology statement by KV2 Audio. It utilizes our groundbreaking 20MHz PDM digital conversion process developed for time alignment applications in our speaker range. The SDD3 incorporates high-quality line driver outputs to allow users to deliver pristine audio signals to delay speakers or under-balcony fills over 100m from the source. The ultimate choice for the distribution of time-corrected audio signal, the SDD3 has two super digital channels that will deliver up to 400 milliseconds of delay. Each of these channels has an adjustable HPF and is easily programmed through the front panel menu, where all settings can be stored and recalled for varying situations. It also has a third channel with up to 10 milliseconds of delay for configuring cardioid subwoofer setups. Ideal for large stadiums, theatres, concert halls, or any application where time correction is required to achieve optimum audio quality.


  • Two very high definition, full-range channels with delays up to 400ms

  • One subwoofer channel with two independent outputs with a delay of up to 10ms

  • Tunable High-Pass filters for easy use with side-fill applications

  • High contrast OLED display

  • ADC sensitivity and LEVEL pots for easy and optimal system level setup

  • Phase reverse switch on each output

  • Line driver on each output for the highest possible signal integrity over long cables

  • A level meter on each input

  • Delay setup (time, distance - metric or imperial)

  • Cardioid mode for easy cardioid setup

  • Up to 30 user memory, power-off autosave

  • Lock feature - digital part only

  • Temperature auto-recalculation


Especially designed as a super high-quality audio delay line

  • Fixed installations

  • Live music and performance

  • Can be used to enhance the performance of third-party systems

System Acoustic Performance

-1dB Response: 2Hz to 40kHz

-10dB Response: 2Hz to 100kHz

Sampling Frequency: 20MHz, PDM

Dynamic Range: >105dB

Channel Crosstalk: 90dB

Signal to Noise Ratio: 105dB

Total Harmonic Distortion: 0.005%

Signal Input

Input Channels: 2 Full range + 1 Subwoofer

Input Impedance: 20kΩ (balanced)

Max. Input voltage: +14dBu

Line input: XLR

Signal Output

Signal Output Channels: 2 Full range + 2 Subwoofer

Output Impedance: 50Ω

Through Signal Output: XLR

Delay Signal Output: XLR


Input Level Control: -10 / +10dB

Subwoofer Level Control: -10 / +10dB

System setup: Normal / Cardioid mode

Delay Range: 0.012ms ÷ 393.216ms, step 0.003ms

Full Range Mode: 2 channels

Phase: 0° / 180°

High Pass Filter: OFF to 260Hz

Indicators: OLED Display

Memory: 30

Power Requirements

Power Connector: IEC 320

Operating Voltage: 115V / 230V

Operating Voltage Range: 90 to130V@60Hz | 180 to 260V@50Hz

Physical Dimensions

Height: 44 mm (1.75")

Width: 482.6 mm (19.0")

Depth: 203 mm (7.9")

Weight: 3.6 kg (7.94lbs)

Product code

  • KVV 987 302 - SDD3 - 230V

  • KVV 987 303 - SDD3 - 115V

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