Moscow theatre’s acoustic overhaul

Moscow’s Central Palace for the Culture of Railway Workers (CDKG) has recently installed an Alcons audio system to handle its array of classical and modern performances, conferences, banquets and exhibitions.

The facility was originally built to provide a social focus for Moscow’s railway employees.

LTM, a Russian supply and installation company, handled the refit at the 800-capcity concert hall.

The Alcons main front system comprises 12 QR36 pro-ribbon line-source columns, each fitted with double RBN1801 pro-ribbon HF drivers and six 6.5” woofers. For low-mid extension, six QM36 line-source fill columns are installed, each fitted with six 6.5” woofers, together with the QR36 forming two arrays of nine metres tall. For the low frequency extension, 14 QB363 bass columns were used, with three 12" vented woofers, forming two bass arrays of seven metres tall.

The side-by-side flown arrays were designed to blend into the hall’s décor through the ACO colour scheme in RAL 1001 beige finish.

Also installed are five Alcons SR9 front fills with RBN401 pro-ribbon HF driver with two 5” woofers, the entire system being powered by ten ALC4-ST 2 x 2250W amplifiers and one ALC2-ST 2 x 1.050W amplifier. System control is by eleven Alcons 24 bit, 96 kHz Digital Drive Processors.

Andrey Zhelamski, pro audio manager at LTM, said: “Using the line-source Q series , we could avoid using speakers beneath the balcony but still provide a sound pressure of 110-112dB throughout the hall, with a variation of less than 3dB. Also, due to the line-source configuration, every person in the audience is sitting on-axis in the vertical plane with the system.”

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