Data Sheet

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030221
THIELE SMALL PARAMETERS (8 Ω MODEL)
3
DIMENSIONS & MOUNTING INFORMATION
Overall Diameter 331 mm
Width Across Flats 320 mm
Flange Height 11 mm
Depth (Excl. Flange) 112.23 mm
Magnet Diameter 200 mm
Chassis Shoulder Diameter 282 mm
Outer Bolt Circle x4 M6 on 318 mm PCD
Inner Bolt Circle x8 M6 on 293 mm PCD
WEIGHT
Nett Weight 9.20 kg / 20.28 lb
Shipping Weight 10.00 kg / 22.05 lb
Fs 53.27 Hz
Re 5.93 Ω
Qms 14.66
Qes 0.23
Qts 0.23
Le (@ 1 kHz) 0.42 mH
Le (@ 10 kHz) - mH
Vas 66.58 Litres
Mms 65.37 g
Sd 530.93 cm
2
Cms 168.33 µm/N
BL 21.46 T/m
Xmax 2.7 mm
Vd 0.143 Litres
Ref. Efciency 5.1%
EBP 231.60 Hz
* Power compression is the reduction of sensitivity at the specied power. Higher power ratings do not necessarily
give a proportionate increase in SPL therefore the maximum SPL of the driver may signicantly exceed that of other
manufacturers with high power ratings.
** Distortion is measured at 10% of the rated power (A.E.S. Standard).
1. A.E.S. Standard (60 to 600 Hz). Program 600 Watts.
2. A.E.S. Recommended Practice.
3. Thiele - Small Parameters follow a 300 Watt preconditioning period veried by Klippel LSI measurement.
4. 2.83V. Half space response measured in a 975 Litre sealed enclosure.
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.
PD.121/2 MID RANGE DRIVER
GENERAL SPECIFICATIONS
Nominal Diameter 12” / 300 mm
Voice Coil Diameter 2.5” / 63 mm
Available Impedances 4 / 8 / 16 Ohm
Power Rating
1 2 *
300 W (A.E.S.)
Peak Power (6dB Crest
Factor)
*
1200 W (A.E.S.)
Sensitivity (1W - 1m)
*
99 dB
Frequency Range 100 Hz - 6 kHz
Recommended Enclosure
Volume
10 - 60 Litres
Resonance 53.27 Hz
Voice Coil Winding Depth 12 mm / 0.47”
Magnet Gap Depth 9 mm / 0.35”
Flux Density 1.5 Tesla
Magnet Material Ceramic
Voice Coil Material Copper
Former Material Glass Fibre
Dust Dome Material Paper
Suspension Material Fabric
Cone Material Paper
Surround Material Fabric
FREQUENCY RESPONSE & IMPEDANCE CHARTS
4
20
0
50
100
150
200
250
300
+50
+60
+70
+80
+90
+100
+110
50 100 200 500 1k 2k 5k 10k 20k
Ohms (Ω) dB (1W* - 1m)
Hz