Home / Venues / The Royal Sonesta Chicago Downtown / Grand ABC

Grand ABC at The Royal Sonesta Chicago Downtown

Published dimensions

Grand ABC is 27.1 x 9.4 m (89 x 31 ft), 255 m² (2,742 sq ft), with a 4 m (13 ft) ceiling.

Plan view

LED wall that fits

Under a 4 m ceiling with 1.5 m trim and 0.3 m clearance you get 4 rows of 500 mm tile flown. Along the 27.1 m wall a Absen A2 Pro wall runs 43 x 4 (7224 x 672 px, 1,720 kg, 31.8 kW).

Panel	Pitch	Wall (cols x rows)	Size	Resolution	Weight	Power (max)
9thPanel DW1.9 S Pro	1.875 mm	36 x 6 = 216	21.6 x 2 m	11520 x 1080	1,037 kg / 2,286 lb	54.9 kW, 264 A @ 208 V
Absen A2 Pro	2.97 mm	43 x 4 = 172	21.5 x 2 m	7224 x 672	1,720 kg / 3,792 lb	31.8 kW, 153 A @ 208 V
Absen A3 Pro	3.9 mm	43 x 4 = 172	21.5 x 2 m	5504 x 512	1,634 kg / 3,602 lb	27.5 kW, 132 A @ 208 V

Wall sizing assumes 1.5 m trim to the bottom edge, 0.3 m clearance under the ceiling, and a wall no wider than 80% of the longest wall. Weight and power are tile totals from the panel spec sheet; add processing, rigging, and cable.

Seating estimate

After a 12 x 7 m stage, Grand ABC holds about 379 theater seats, 155 banquet seats at rounds of 10, or 106 classroom seats. Back row in theater is roughly 20.1 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at The Royal Sonesta Chicago Downtown

Grand Ballroom38.9 x 9.5 m (128 x 31 ft) · 4 m ceiling
Grand BCD24.7 x 9.4 m (81 x 31 ft) · 4 m ceiling
Grand AB21.3 x 9.4 m (70 x 31 ft) · 4 m ceiling
Penthouse Ballroom14.4 x 13.4 m (47 x 44 ft) · 4 m ceiling
Grand CD18.3 x 9.4 m (60 x 31 ft) · 4 m ceiling
Pre-Function A16.2 x 10.4 m (53 x 34 ft) · 2.4 m ceiling
Penthouse Terrace14.1 x 10.4 m (46 x 34 ft) · 3.1 m ceiling
Grand A14.3 x 9.4 m (47 x 31 ft) · 4 m ceiling
Grand BC13.1 x 9.4 m (43 x 31 ft) · 4 m ceiling
Grand D11.9 x 9.4 m (39 x 31 ft) · 4 m ceiling
Penthouse Pre-Function4.3 x 18 m (14 x 59 ft) · 2.4 m ceiling
Adams15.9 x 4.1 m (52 x 13 ft) · 2.4 m ceiling

Published dimensions (source), fetched 2026-09-04. All rooms at The Royal Sonesta Chicago Downtown · Venues in Chicago