DACT

DACT stepped audio attenuators. Danish Audio ConnecT manufactures a range of High-End stepped audio attenuators for Hi-Fi, A/V and Pro-Audio, used by DIY Audiophiles and audio equipment manufacturers throughout the world: CT2 uses a resistor network built on non-inductive SMD resistors. The SMD resistors are mounted on a very compact PCB, offering a very short and ‘pure’ signal path. All switch contacts and connectors are gold plated.

DACT CT1 and CT2 stepped audio attenuator data sheet
DACT logo

Data sheet

RoHS Certificate

CT2-stereo

High-end sound and specifications

Compact design – easy to mount in most existing audio amplifiers as DIY upgrade.

Audio volume controls with very accurate attenuation and tracking (0.05dB).

Resistor network using Surface Mount Device (SMD) type of resistors for short signal path and very low series inductance and stray capacitance

Available as master volume control with 60dB attenuation range (1, 2, 4, 6, 8 decks) and as individual channel fine adjustment control with 0.5dB level change between each step (only available with 1 deck).

Above: Stereo version of CT2
Below: CT2-10k-1/fine with 0.5dB steps

CT2-fine

Attenuator-family 

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DESCRIPTION

The CT2 Audio Volume Controls are high quality stepped 24-position attenuators. They were designed for maximum sonic quality, accuracy and reliability. This makes them equally suited for audiophile applications and for professional applications.
Available as master volume control with 60dB attenuation range (1, 2, 4, 6, 8 decks) and as individual channel fine adjustment (CT2-10k-1/fine) with 0.5dB level change between each step (only available with 1 deck)
Their series resistor networks consist of 23 non-inductive, low noise, SMD metal film resistors.
The layout of the PC Boards and the choice of SMD resistors have reduced the signal path to a minimum length (typical five times shorter than conventional stepped attenuator designs with leaded resistors). The PCB design combined with the special resistors also account for the very low series inductance and the very low stray capacitance.
The result is a bandwidth beyond even the most demanding audiophiles’ requirements.
There has been special care taken to ensure the durability of CT2. Therefore, all contacts and PCB traces are gold plated to prevent any corrosion. As a result, the CT2s will maintain their specifications after long time of use even in hot and humid environments.
The rotary switch itself is a gold plated high precision switch manufactured in Switzerland.

SPECIFICATIONS

Number of steps

24

Bandwidth (10kOhm):

50 MHz

Channel matching:

+/-0.05 dB

Attenuation accuracy:

+/-0.05 dB

THD:

0.0001 %

Mechanical life, min.

25,000 cycles

APPLICATIONS

  • Passive preamplifier (volume control
  • Volume control in audiophile amplifiers
  • Volume control in professional audio and A/V equipment
  • Upgrading Hi-Fi and A/V audio equipment
  • Reference audio attenuator
  • Test equipment attenuator
  • Wide-band attenuator

SPECIAL FEATURES

  • Low noise, non-inductive, metal film SMD resistor network
  • CT2-resistors CT2 PCB showing the SMD resistor network.

    Compact design
  • Entire signal path gold plated
  • Shorter signal path than conventional attenuators with leaded resistors
  • Reduced inductance and stray capacitance
  • Improved sonic quality
  • Improved accuracy - 0.05dB tracking and 0.05dB attenuation accuracy
  • Improved reliability
  • Increased bandwidth
  • Reduced distortion, less than 0.0001%

OTHER  ATTENUATOR  RESOURCES

If you want to view any of the resources below on your monitor, we recommend that you click on the HTML version of the resource.
For printing or archiving we recommend downloading the PDF version.

Attenuator Data Sheet
Click here for on-screen viewing





Review
DACT attenuator review in Hi-Fi World magazineHi-Fi World logo
Click here to read the complete review of DACT’s CT1 Audio attenuator in the British Hi-Fi World magazine







Review
CT1 review in EnjoyTheMusic.com
Click here to read the complete review of EnjoyTheMusic.com logoDACT’s CT1 Audio attenuator in the online magazine EnjoyTheMusic.com

 








Review
CT1 review in Audio Electronics magazineAudio Amateur Corp. logo
Click here to read the complete review of DACT’s CT1 Audio attenuator in the American Audio Electronics magazine








Review
CT2 review by Stephen Chen
Click here to read the complete review by Stephen Chen to the members of the Audiophile Society of New South Wales, Australia







Application notes
Wiring diagram for a passive 4-channel (balanced stereo) volume control





Technical articles
1. Read here why we at  DACT prefer to use SMD resistors for all our high-end Stepped Audio Attenuators
2. Passive versus active preamplifiers / volume controls







High quality photos
1.  CT2 6-deck A/V Home theater attenuator
2.  CT2 8-deck A/V Home Theater attenuator



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