Celestion Orwell PA speakers from K+T magazine 4/2016

Kit without housing, price per speaker

Orwell is a high-quality two-and-a-half-way PA loudspeaker with HiFi sound qualities. Orwell uses the Celestion CDX20-3020 tweeter with a P-Audio PH-2380 horn as a tweeter. The bass part is handled by two Celestion FTR15-3070C. 

The crossover consists of a 3rd order high pass (18 dB / octave) for the tweeter. A 2nd order low pass separates the lower woofer above approx. 300 Hz. The upper woofer is also separated above 1000 Hz with a 2nd order low pass (12 dB / octave). Both woofers play together in the bass range below 300 Hz. The frequency response of the loudspeaker is balanced. The decay spectrum shows small artifacts typical of horns. At low volumes, the non-linear distortions are below the measurement limit according to Klang+Ton magazine. At medium volumes (95 dB, 1 m) they are below 0.5% between 500 and 4000 Hz. At 105 dB, 1 m they remain below 1.5% in the frequency range mentioned.

.

Technical data:

• Impedance: 4 Ohm
• Sound pressure level (2.83V/1m): 99 dB
• Dimensions (HxWxD): 1250 x 550 x 550 mm
• Frequency range (-8dB): 40 - 20000 Hz
• Crossover frequency(s): 220, 1050 Hz
• Principle: bass reflex box

.

• Celestion CDX20-3020, 3 inch titanium driver, 8 Ohm
• P-Audio 2 inch horn PH-2380
• 2x Celestion woofer FTR15-3070C, 100dB, 50Hz-2.5kHz
• 4x bass reflex tube HP100, 100x200 mm, black
• 3x convoluted foam panels N25 100x50x4cm anthracite/black
• 2x Neutrik Speakon NL4MPR, round socket, 4-pin
• 4m speaker cable 2x2.5 mm2, transparent
• Speaker feet, pack of 4 (st-BN202554)
• 24x 1 piece drive-in nut M6x9mm, DIN 6930 g, galvanized
• 24x 1 piece Allen screw M6x35mm, DIN 912, black
• 2x Handle shell GSM-220, steel 22x16 cm black
• Construction plan for the kit the crossover components (right), to be assembled on a wooden board.
• Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
• Audaphon MKP CAP Superior 8.2 μF / 400 Vdc
• Audaphon MKT capacitor 33 μF / 160 Vdc
• Audaphon MKT capacitor 47 μF / 160 Vdc
• 1.0 mm air coil, 1.5 mH/0.62 Ohm
• Mundorf BS140 core coil 8.2mH/0.33Ohm
• Mundorf H-core coil H140, 2.2 mH/0.14 0hm
• Ceramic resistor 15 Ohm/20 Watt