Multi-Purpose Hall, Arunachal Pradesh Assembly Complex.

What the floor told us when work started.

• The architectural ceiling already had a job to do.

  Before the stage rig arrived, the stepped / terraced ceiling already carried HVAC supply diffusers, perforated acoustic tiles and the recessed downlight cut-outs. The 62-fixture theatrical rig and the 20 RGBW LED PARs had to thread between the existing grid — not replace it — so HVAC supply, the 100× 20 W LED downlights and the theatrical fixtures all sit in the same plane. Photograph 02 shows six rows of fixtures threading between the perforated tiles and the square HVAC diffusers without one trade blocking another.

• The spec-reduction collapsed three line items into one wall plate — without losing programmability.

  The original tender called for a Zero 88 120-channel / 200-fixture console (item 1.9), a 192+192+48-way cross-connecting panel (item 1.10) and a 48-channel × 5 kW floor-mounted dimmer rack (item 1.11). All three were specification-reduced during procurement and the handed-over deliverable is a PLS Stone 2048 Pearl 2010 console plus a single wall-mounted 12-channel × 4 kW patch-panel-with-built-in-dimmer (items 1.10 and 1.11 merged). The 62 fixtures were re-grouped into the 12 dimmer channels so every named scene the venue still asks for — Function / Presentation / Performance / Cyclorama / Cultural — sits inside the reduced channel count.

• 19 microphones under one DBX DriveRack 260 feedback profile.

  The dais format the hall runs — 2 cordless collar, 2 cordless handheld, 4 dynamic vocal and 11 podium goosenecks — would ring most multi-purpose rooms. The DBX DriveRack 260 carries the feedback-suppression profile across the whole microphone bus, the Yamaha MG24/14FX analogue mixer carries the gain structure, and the JBL Control 29 AV-class surround layer fills the audience plane without forcing the STX 825-class mains into the suppressor's gating threshold.

• Follow-Me PTZ tracking + Dias View confidence monitor work as one gesture.

  The Follow-Me layer — 2× PTX 36× 4 MP PTZ cameras on the house side walls, a 4-channel NVR for the recording loop, a joystick-controlled operator workstation and a 15-inch operator monitor — auto-tracks the presenter on stage so the projection feed never loses the speaker. The 32-inch HD LED Dias View monitor on the stage edge feeds the same projection back to the presenter, so the speaker reads the audience's view without turning round. The recording loop on the 4-channel NVR retains every sitting for review.

• Two specifications were reduced on the power chain too.

  The originally tendered 10 kVA servo stabiliser (item 19) and 10 kVA / 15-minute UPS (item 20) were both specification-reduced to 5 kVA each, with the UPS upgraded to a 30-minute SMF-battery backup window so the head-end rides through utility transients longer than the original 15-minute envelope. The 42U head-end rack carries the audio chain, the operator workstation and the UPS / stabiliser; the 24U secondary rack carries the lighting console, the 4-channel NVR and the Follow-Me peripherals.

• Sub-contracting under a published BOQ leaves no room for site interpretation.

  Every panel, every fixture and every conductor was signed off against the AP PWD's published BOQ inspection schedule before commissioning — including the 100 LED downlights (item 1.14), the 600 m of FR-PVC IS-694 wiring (item 1.16), the 72 stage light power points (item 1.17 a/b/c), the 2-camera Follow-Me system (item 24) and the Prolite emergency-lighting fit-out (item 26). The internal commissioning log is keyed row-by-row to the tender's BOQ — the PWD inspector worked off a single matching document at every visit, the same discipline applied to the Legislative Assembly chamber inside the same Assembly Complex and the Cabinet Conference Room at the separate Secretariat Complex.