MIRANDA - LADY and RD HORN

horns in solid wood -  feature constant directivity

The Royal Device MIRANDA & LADY HORNs are a CONSTANT DIRECTIVITY 90° Hi-Horn expecially designed to reproduce a frequency range starting from 2 KHz to 20 KHz . It is made all in solid wood and features NO FRONTAL PHASE ALIGNER

A particular type of THROAT has been designed to direct couple a SEAS .75" driver and the frequency response starts from 2 Khz with an efficiency of 100 dB/1W/ 1m  up to 18.5 Khz.

The horns are completely worked out starting from a wood mono-block. This choice together with the dimensions of the horn due to the high frequency range involved practically avoids all resonances that normally materials as A.B.S., fiberglass or similars and metal add to sound producing HI-COLORATION.

          LADY Horn

MIRANDA Horn 120 mm

The CONSTANT DIRECTIVITY feature helps to release the very best smoothing treble reproduction ever had in the treble range. Central stereo imaging remains constant also moving listening point toward the speakers. The horn rotation helps to fix frequency and phase response. These horns has been specially designed for Royal Device loudspeaker system (MIRANDA is now used also onto the ANNA & ERICA HORN models)  and acoustic crossed only starting from 9.5 KHz. The horn mounting gives the maximum speaker decoupling and suite easy listening positioning. The possibility to move forward/back or to rotate the horn makes the speaker a real "easy adapt" AUDIO system. The frequency response can be regulated into the acoustic cross of the treble range depending on the listening point placement. Even the height of the ear in this case won't be anymore a problem. The below graph shows some possibilities. The curve in the middle is the normal positioning (ear at horn height). The upper curve is obtained by moving the horn towards the front of the speaker (or leaving the horn in normal position and having ears higher then horn height). The lower curve is the response moving it back of few millimeters in respect to the normal horn positioning (or leaving the horn in normal position and having ears lower then horn height). In any of this cases phase between drivers (woofer & horn) remains perfectly matched.

LAURA ACOUSTIC RESPONSE DEPENDING ON HORN POSITIONING .

The Royal Device RD-HORN is a Hi-Horn expecially designed to reproduce a frequency range starting from 2 KHz to 20 KHz . It is made all in solid wood (walnut, cherry or MDF laquered) and features NO FRONTAL PHASE ALIGNER

A particular type of THROAT has been designed to DIRECT couple a SEAS .75" driver and the frequency response is flat starting from 2.5 KHz with an efficiency of 101 dB/1W/ 1m (+/- 2dB) up to 17.5 Khz.

The solid wood together with the dimensions of the horn due to the high frequency range involved practically avoids all resonances that normally materials as A.B.S., fiberglass or similars and metal add to sound producing Hi-COLORATION.

The horn is completely worked out starting from a mono-block of wood made by several solid staves 1" thick. These horns have been expecially designed for the DIANA and LAURA Royal Device loudspeakers.

Hereby are shown the MLS measures made on axis at one meter distance with 1/3 octave smoothing (fig.1 ) and 1/12 octave smoothing (fig.2). Measures are made with 2 meters standard (2.5 mm section) cable. RD-BW CABLE improves high frequency response above 17 KHz of about +1.8 dBs.

FIGURE 1

FIGURE 2