PD.121/2
Mid Range Driver
- New ergonomic, vented cast aluminium chassis offers improved thermal control
- Improved motor plating providing a more resilient finish and resistance to corrosion
- Mid range transducer suitable for either direct radiating or horn-loaded applications
- Smooth frequency response for easy integration across vocal frequency band
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Download PDF Datasheet
The PD.121/2 excels in a variety of systems being perfectly suited to either direct radiating or horn loaded applications. Covering the critical vocal range in a single unit the PD.121/2 is particularly effective at faithfully reproducing the pattern of powerful low end male vocals.
The PD.121 perfectly compliments our 15”, 18”, 21” and 24” transducers as part of a three-way system.
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 |
| Magnet Weight | |
| Voice Coil Material | Copper |
| Former Material | Glass Fibre |
| Dust Dome Material | Paper |
| Suspension Material | Fabric |
| Cone Material | Paper |
| Surround Material | Fabric |
Thiele Small Parameters
| 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) | '- |
| Vas | 66.58 Litres |
| Mms | 65.37 g |
| Sd | 530.93 cm2 |
| Cms | 168.33 μm/N |
| BL | 21.46 T/m |
| Xmax | 2.7 mm |
| Vd | 0.143 Litres |
| Ref. Efficiency | 5.10% |
| EBP | 231.60 Hz |
Dimensions & Mounting
| Overall Diameter | 331 mm |
| Widths 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 |
Shipping Information
| Nett Weight | |
| Shipping Weight |
Notes
* 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 (60 to 600 Hz). Program 600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 300 Watt preconditioning period verified 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.
** Distortion is measured at 10% of the rated power (AES Standard).
1. AES Standard (60 to 600 Hz). Program 600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 300 Watt preconditioning period verified 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.
Frequency Response & Impedance
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