Free UK Shipping.

VIP & UK B2B Trade Accounts.

Safe & Secure Payment Methods.

Manufacturer Support.


Mid Range Driver
(1 customer review)
  • Heavy-duty cast aluminium chassis for increased rigidity
  • A B/L in excess of 21 T/m
  • Extended mid range response up to 5kHz
  • Suitable for either direct radiating or popular horn loaded mid/high applications
  • Easy integration with small format compression drivers


12" / 300 mm

Coil Diameter

3.0" / 76 mm

Power Rating

400 w (A.E.S.)

Frequency Range

50 Hz - 5 kHz


97 dB


2.5 mm
SKU: PD.123ER .8 Category:

Sorry, this product is out of manufacture and no longer available.

Have you seen our latest range of drivers?

Go to Products

Find Distributors and Retailers

Download Datasheet PDF


Ask a Question About the PD.123ER

General Specifications
Type Mid Range Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 12" / 300 mm
Voice Coil Diameter 3.0" / 76 mm
Peak Power (6 dB Crest Factor) * 1600 w (A.E.S.)
Power Rating 1 2 * 400 w (A.E.S.)
Sensitivity (1W/ 1m) * 97 dB
Frequency Range 50 Hz - 5 kHz
Resonance 55.87 Hz
Voice Coil Winding Depth 13 mm / 0.51"
Recommended Enclosure Volume 20 - 80 Litres
Flux Density 1.35 Tesla
Magnet Material Ceramic
Magnet Gap Depth 9 mm / 0.35"
Former Material Glass Fibre
Dust Dome Material Paper
Voice Coil Material Copper
Cone Material Paper
Suspension Material Fabric
Surround Material Fabric
Thiele Small Parameters
Fs 55.87 Hz
Re 6.74 Ω
Qms 13.03
Qes 0.3
Qts 0.29
Le (@ 1 kHz) 0.25 mh
Vas 54.54 litres
Mms 58.92 g
Sd 530.93 cm2
Cms 138 µm/N
BL 21.73 T/m
Xmax 2.5 mm
Vd 0.13 litres
Ref. Efficiency 4.23%
EBP 186.23 Hz
Dimensions & Mounting
Overall Diameter 330 mm
Width Across Flats 320.5 mm
Flange Height 10 mm
Depth (Excl. Flange) 117 mm
Magnet Diameter 200 mm
Chassis Shoulder Diameter 282 mm
Outer Bolt Circle 6 * M6 on 318mm PCD
Inner Bolt Circle 8 * M6 on 293mm PCD
Shipping Information
Nett Weight 9.5 Kg / 20.94 lb.
Shipping Weight 9.75 Kg / 21.49 lb.
*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.

1. AES Standard (60 to 600 Hz) Program 800 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 400 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.
Frequency Response & Impedance
What people are saying about the PD.123ER

Please take a moment to share your feedback with us. We love to hear your success stories and comments about our products. It can really help us, and other PD customers, on our continuing mission of creating better sound.

1 review for PD.123ER

  1. Micke kajdo

    This is a wery good sounding 12inch. I have these in a double 12 horn+horn mid/high disco system and its a killer!
    Deliver mids at the top.

Add a review

Your email address will not be published. Required fields are marked *

Got a question about the PD.123ER ? Send us a message...

15 + 6 =

Pin It on Pinterest

Share This