Diana is a 30 liters bookshelf frontal load bass reflex / solid wood horn loudspeaker system fully designed, hand crafted and manufactured in Italy by Royal Device with optimum design and finishing. The horn is a Royal Device product completely designed to reproduce full 2 – 20 KHz bandwidth at more than 100 dB efficiency together with a completely flat response without using any ogiva or phase alignment on the soft dome ¾" SEAS tweeter. The 8.5" woofer is another Royal Device product and has been specially custom designed for the Laura and Diana Royal Device loudspeaker systems. The Hi-horn is a completely custom design Royal Device product that together with the use of a soft dome SEAS tweeter reproduces full 2– 20 KHz bandwidth with more than 101 dB efficiency with a completely flat response without using a frontal phaser. The hi-cut of the horn (9.5 KHz) with no need of attenuation, makes the speaker a perfect balanced system avoiding any horn nasality. The choice of no crossover on the woofer together with a new frontal WF mechanical alignment (as LAURA MKII design ) and the Royal Device  custom technology for  woofer high break-ups reduction gives a perfect  matching to the HI-HORN  towards WF decay using a 24 dB slope HI-HORN filter in a phase coherent manner .  Woofer bandwidth rise up to 9.5 KHz @- 6 dB, for a full audio band direct radiation with no "midrange horn compression nasality". It delivers 98 dB efficiency together with high velocity and dynamic response. All components used are first class as the new generation Royal Device AudioCap PPFF custom made capacitors.

• N. 1 - 21 cm (8 ^½  inches) Royal Device custom made woofer with high quality low weight paper cone on aluminum die-casting with central phase mechanical filtering for no crossover implementation.

• Type of loading: Bass reflex system. Designed for the upgrade to a back-horn loading system as the Laura speaker. Bottom side removable.  See NEW LADY DIANA TOP MODEL

• N. 1 - 9" Royal Device Exponential RD- HORN Fully Hand-crafted from several solid walnut or cherry staves

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• Royal Device LADY HORN features constant directivity emission on both vertical and horizontal planes. Fully Hand-crafted from one piece solid wood.

   

• ¾" soft dome SEAS tweeter without ogiva or phase alignment

• Hi-Horn acoustic cross: 9.5 KHz.

• Mean Sensitivity: 98 dB/2.83 Volt/1 meter (100.5 "A" weighted).

• Frequency response: 35- 20,000 Hz - (20-20,000 Hz LADY DIANA TOP MODEL)

• Woofer crossover type: No crossover. Woofer is provided with a custom Royal Device technology to highly reduce high break up.  

• Horn filter type: 24 dB octave slope phase coherent filter to woofer decay with no serial attenuation

• Nominal impedance: 6 ohm

• Minimum impedance: 4,5 ohms at 200 Hz

• Power handling: to be connected to amplifiers up to 50 Watt rms. per channel. There is no need to go over 15 Watts for indoor use with a No feed back amp.

• Minimum power suggested:
  • 1,5 Watt per channel with the use of RD BI-WIRING CABLES and NO-NEGATIVE FEEDBACK low power TUBE CLASS A  amplifiers
  • Not suited to any Feed Back amplifier  (read the reasons)
• Suggested Amp: S.E. Class A Monotriode, completely no F.B. with 6 ohm nominal output transformer (8 ohms typical) with a rated power output of 2 to 8 Watts / channel or Royal Device amplifiers.

• Golden connectors for BI-amp or BI-wiring - RD BI-WIRING CABLES supplied with the speakers

• Dimensions: 490 (height) x 320 (Width) x 350 (Depth) mm
•                     1120(height) x 320 (Width) x 350 (Depth) mm TOP MODEL

• Weight: 16 kg each   - 25 Kg TOP MODEL

• Cabinet hand-crafted from eight 1" thick solid walnut or cherry staves accomplished by MDF with patented anti-scratch varnish for a full Italian design.