CUSTOM DESIGNS - RD Audio Room View
The Biggest SUBWOOFER of the WORLD
for the most esoteric Audio Room of the World
The Highest efficiency ever obtained with NO distortion using NO feedback tube low power amplifiers and NO crossover on the speakers
Royal Device has on its own developped and built the biggest subwoofer of the world for an AUDIO/VIDEO room that can be also considered as the biggest AUDIO ROOM for private music listening of the world. The audio reproduction is focused on the speakers output capability more than electric power output of the amplifiers with no need of KWatts power supply lines, releasing a 110 dB/1W/1 meter sensitivity starting from below 10 Hz focused on the listening position.
See photos below and click for
The AUDIO room is 6.95 x 8.70 meters. Front LEFT + RIGTH speakers are 8 x LAURA speakers per channel ( see LAURA) with a total of 16 loudpseakers.
Lauras are placed in couple of two, one on top of the other in Delle Curti's configuration.
Only one RD-HORN works in the middle of the 8 speakers for high frequencies reproduction.
On the sides of the speakers two exponential wood panels (2.2 meters high with more than 1 meter width) increase the total efficiency of the system.
SUBWOOFER horns are built underneath the floor in a cavity 1 meter deep. Each horn is driven by 8 x 18" (45 cm) woofers. A total of 16 woofers.
Each horn is 9.5 meters long and has a mouth area of 2.2 square meters and reproduce starting from 10 Hz FULL POWER.
A central channel made by 4 LAURA is used in the same Delle Curti's configuration.
All amplifiers and CD players are placed into a 90 x 90 cm hole completely decoupled.
Rear channels with same speakers.
Total efficiency: 110 dB/1 watt/1 meter
FRONT CHANNELS AND CENTRAL CHANNEL TUBE AMPLIFIERS:
- 2 stereo amplifiers made by 6B4 Push-pull - NO FEEDBACK - For Royal Device custom design and manufacturing. 12-17 Watts/channel in Bi- Amplification manner toward the Hi-Horn. These two amplifiers feed the 16 frontal right and left channels, plus the 4 central channel speakers.
- 1 tube 1,7 Watt Single Ended amplifier - NO FEEDBACK for the left, right and central HIGH HORNS. Horns are Royal Device RD-HORN in solid cherry wood and NO frontal PHASER
SPEAKER AND SIGNAL CABLES
More than 500 meters ( 1700' ) RD cables involved expressely designed for the system. Two cables are used for each speaker and each one is made of 8 wires AVG 24 OFC + shield, particularly assembled and twisted to perfectly match speaker and amplifier needs , manufactured with the same technique of the RD-BW cables.
Signal cables are made by 32 wires AVG 24 OFC + 4 internal shielded foils.
SUB-WOOFER AMPLIFIERS:
2 x MONO TUBES AMPLIFIERS
Acoustic treatment on ceiling and walls made in different and several ways to extremely reduce room wall and ceiling resonances below 200 Hz (standing waves).
Anechoic Back Wall to completely avoid backwall reflection.
SUB-WOOFER Compression chamber closure ( 120 Kg on 3,6 mq) are held and reiforced by an extra weight of 600 Kg. Total closure weight 720 Kg.
Speakers and listening position designed for best results
Acoustic level at listening position (6 meters from frontal speakers) are 100 dB with 1 Watt.
Acoustic level reproduction can rise easyly above real play with No distorsion.
Frontal and deep perspective perfectly matching with real play
All frequencies from 30 to 5000 Hz are reproduced by speakers with NO-CROSSOVER in a full range modality. This gives no nasal twang at all.
The RD Audio Room - FRONT CHANNEL VIEW
FRONT SECTION and central CHANNEL SHOWN all speakers and horns are perfectly phase aligned
The RD Audio Room - Left REAR CHANNEL VIEW
and Listenin position at 5.8 meters from central and frontal channels
The RD Audio Room - Right side -
The 8 x Laura with the central RD Horn with the frontal side exponential panels
The frontal channel is placed as to create an elliptic tri-dimensional speaker loaded with exponential panels. On the floor can be seen one of the two 2.2 square meters grids of the mouth of one of the SUB-HORN
It can be seen all the acoustic ceiling treatment
The RD Audio Room - the central channel view and some of the electronics involved
The RD Audio Room - Left side -
The 8 x Laura with the central RD Horn with the frontal side exponential panels
The frontal channel is placed as to create an elliptic tri-dimensional speaker loaded with exponential panels. On the floor can be seen the 2.2 square meters grid of the mouth of left SUB-HORN
It can be seen all the acoustic ceiling treatment with the expansion horn conveyers
The RD Audio Room - back wall anecoic treatment
The RD Audio Room - Here is where real music and emotions live
Aliante s.r.l.
Viale dell’Industria 19
21052 Busto Arsizio (VA), ITALY.
Tel. +39 0331 354070
Fax. +39 0331 342445
e-mail: aliante@royaldevice.com