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Denver Courthouse: Audio/Video Design. Polysonics Corp 5115 MacArthur Boulevard Washington, D.C. 20016 1.800.388.7172 Denver Courthouse: Audio/Video Design. Presented by: George Spano Principal Consultant, Polysonics Corp Dan Dillingham

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denver courthouse audio video design

Denver Courthouse:Audio/Video Design

Polysonics Corp

5115 MacArthur Boulevard

Washington, D.C. 20016


denver courthouse audio video design1

Denver Courthouse:Audio/Video Design

Presented by:

George Spano

Principal Consultant, Polysonics Corp

Dan Dillingham

Senior Consultant, Polysonics Corp


SIZE: Ten stories with special proceedings and 15 district/magistrate courtrooms, one grand jury and one jury assembly room. A tunnel to the existing courthouse under the street with secure passage and data link was provided.



ACCESS FLOORS: All courtrooms have 16” deep access floors for cables and air conditioning. All courtroom floor boxes are 10”x12”x5”deep and have extra cable coiled up in the floor with a wire tie for ease of movement at least two floor tiles in any direction. All access floor tiles are covered with cork for easy movement.




The contract allowed an option for repositioning of the floor boxes and every judge exercised this option to locate furniture to the desired location. Courtroom AV closets are close to the access floor along the private corridor providing good space planning and ease of wire management.

Courtroom Furniture



The floor boxes used 50 pin DT12 connectors. Connections are made with one XLR microphone connector, power connector and one DT12 connector for all other equipment.

Access Floor Box



LIGHTING: Clearstory windows to the public corridor allow diffused natural light but maintain security. Wide angle down lights provide high efficiency and cove lights provide diffused light resulting in very little glare and good camera face shots.

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Portable Jury Box



ACOUSTICS: A central system with ducting to the access floor for supply air and ducting to the ceiling for return air was very quiet. Cork floors and adequate acoustical wall panels provided excellent speech intelligibility. Recordings were very clear.

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Acoustical Wall Panels/Clearstory Lighting



SOUND SYSTEMS: Ceiling speakers in the courtrooms, digital mixers and gooseneck microphones provided good sound. Two infrared emitters in each courtroom provided assisted listening and interpretation. The interpreter has a head worn microphone at the witness box for translation into English over the speakers.

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Wiremold/Plugmold in Knee Space



The interpreter also has a headset with microphone and control box at the defense table for clear listening via the headphones and microphone output to the speakers or infrared emitters (translation into English or a foreign language). A phone jack and head worn phone was provided at the defense table for the defendant to allow translation via the New Mexico interpreters association. Digital recording was provided with save to CD and the server. The special proceedings court was so large that column speakers were used with ceiling speakers over the bench. All courtrooms had a desktop speaker with headphone connection at the reporter’s station.

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Cork Access Floor


video evidence

All courtrooms were outfitted with “stationary video systems” consisting of wiring, switches, video processing and a control system. Four portable systems were provided with a video evidence cart containg a VCR/DVD player, document camera, audio mixer, monitor with annotation and inputs for attorney-supplied computers. These had a single DT12 connector for connection at the lectern or attorney tables.



Flat plasma screens on carts were provided along with 15” tabletop monitors. The portable witness box had a 4” depression on one sideof the work surface for the annotation monitor to reduce the site line interference.



Three courtrooms also had built-in jury box 15” monitors, which stowed in armrests between every other juror seat. The jury assembly room has a projector and ceiling speakers. All courtrooms are connected to a hub to receive video to their stationary video evidence system. Audio (send and receive) is also connected from the hub to all sound systems including jury assembly. The three courtrooms with cameras may be viewed with authorized selection in any courtroom or the jury assembly room.



VIDEO CONFERENCE: Since video conferencing is used frequently for habeas corpus hearings, three courtrooms had built in cameras in wall pockets behind glass. The CODECs are connected to the hub. Any courtroom with cameras may start a video conference using the network controlled system to engage the CODEC and select a number provided in the speed dial. The speed dial may be programmed remotely and shared by all courtrooms. The videoconference system is very easy to use.



The design allows easy repositioning of the courtroom furniture and all courtrooms may use the portable video evidence systems. The hub allows the authorized viewing of the courtroom in any courtroom and jury assembly. The hub also allows video conferencing in any courtroom with the cameras. The hub is flexible and allows for expansion for more cameras and CODECs. An MATV system was provided to distribute video to the jury assembly room and chambers.



The A/V contract was exercised thru the GSA and the cooperation was good. Wire pulls and equipment installation was coordinated with a local A/V contractor. This allowed for timing to be managed by the general contractor with the court free of any coordination/installation headaches. An email system of requests for information speedily handled construction questions maintaining a good installation pace. The building was built on schedule and on budget demonstrating a good relationship between the court, GSA, the general contractor, electrician and A/V contractor.


quality reliability

A mock up of the equipment was shown to the court at the A/V contractor’s facility. Problems were identified and rectified before courtroom work had begun. The installation was completed and testing began. A punch list was generated and corrections were promptly implemented. The court training was completed with all court personnel and 2nd level advanced training for a few special staff. The local contractor provided prompt service when problems were identified. The system has been in service for a year and the number of problems both from hardware and user operation are almost zero. The system meets expectations and is reliable.


renovated special proceedings courtroom

Renovated Special Proceedings Courtroom

Washington, D.C.

  • Shallow access floor added
  • Historic nature does not allow changes
  • Sound system had to deal with severe acoustical problems