Specs Sheet

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NOMINAL DIAMETER POWER HANDLING SENSITIVITY (1W/ 1m) FREQUENCY RESPONSE VOICE COIL DIAMETER MAXIMUM LINEAR EXCURSION
© Precision Devices International Ltd. We operate a policy of continuous research and development and as such published specifications are subject to change without notice.
210220
FREQUENCY RESPONSE AND IMPEDANCE CHARTSFEATURES:
THIELE SMALL Parameters (8 Ω MODEL)
3
GENERAL SPECIFICATIONS
Nominal Diameter 12” / 304.8 mm
Voice Coil Diameter 4.0” / 101.6 mm
Available Impedances 8 Ohm
Power Rating
1 2 *
1100 W (A.E.S.)
Peak Power (6dB Crest Factor)* 4400 W (A.E.S.)
Sensitivity (1W - 1m)* 99 dB
Frequency Range 45 Hz - 4 kHz
Recommended Enclosure Volume 25 - 70 Litres
Resonance 58 Hz
Voice Coil Winding Depth 22.00 mm / 0.87”
Magnet Gap Depth 11.0 mm / 0.43”
Flux Density 1.25 Tesla
Magnet Material Neodymium
Voice Coil Material Copper Clad Aluminium
Former Material Glass Fibre
Dust Dome Material Solid Paper
Suspension Material Poly Cotton / Silicone Damping
Cone / Surround Material Paper / M Roll Poly Cotton
DIMENSIONS
Overall Diameter 331.0 mm
Width Across Flats 320 mm
Flange Height 10.0 mm
Depth (Excl. Flange) 146.00 mm
Magnet Diameter 138 mm
MOUNTING INFORMATION
Chassis Shoulder Diameter 280.0 mm
Outer Bolt Circle x4 M6 on 318 mm PCD
WEIGHT
Nett Weight 7.00 kg / 15.43 lb
Shipping Weight 7.50 kg / 16.53 lb
Fs 58 Hz
Re 6.1 Ω
Qms 8.20
Qes 0.370
Qts 0.350
Le
(@ 1 kHz) 2.60 mH
Le
(@ 10 kHz) 0.750 mH
Vas 49 Litres
Mms 60.00 g
Sd 540 cm
2
Cms 119.00 μm/N
BL 19.20 T/m
Xmax 8.50 mm
Vd 0.590 Litres
Ref. Eciency 2.52%
EBP 156.76 Hz
*1 Power compression is the reduction of sensitivity at the specified power. Higher power
ratings do not necessarily give a proportionate increase in SPL therefore the maximum SPL of
the driver may significantly exceed that of other manufacturers with high power ratings.
** Distortion is measured at 10% of the rated power (AES Standard).
1. AES Standard (55 to 550 Hz) @ 1000 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 800 Watt preconditioning period.
Please note that frequency response measurements are supplied for comparison purposes
only and are not a measure of the low frequency performance which may be achievable in a
fully optimised system.
Half space response measured in a 950 Litre sealed enclosure.
• Radial neodymium motor structure.
• Vented cast aluminium chassis for improved thermal control of voice coil.
• Forced air cooling vented voice coil gap.
• Aluminium demodulation ring.
• Dual spider configuration with silicone based damping control.
• Rear aluminium heat sink.
The PD.124NR1 is intended as a high power mid bass driver in multiway systems. The
unit can also be used as a dedicated woofer in bass reflex and horn loaded designs.
The optimised radial neodymium motor system allows more ecient management
of the magnetic flux. Forced air venting and rear aluminium base plate keeps the
motor temperature under control and reduces power compression to a minimum.
The unit features a 4-inch, high temperature, CCAW voice coil capable of handling
1100 W (AES) and exhibits an average sensitivity of 99dB across its working band.
BASS/ MID RANGE DRIVER
PD.124NR1
12” / 304.8 mm 1100 W (A.E.S.) 99 dB 45 Hz - 4 kHz 4.0” / 101.6 mm 8.50 mm Xmax
PD.124NR1 BASS/ MID RANGE DRIVER