Free UK Shipping.

VIP & UK B2B Trade Accounts.

Safe & Secure Payment Methods.

Manufacturer Support.


Sub Bass Driver
(2 customer reviews)
  • Heavy-duty cast aluminium chassis for increased rigidity
  • Power compression 2dB at rated power
  • A B/L in excess of 35 T/m
  • Double suspension system
  • Suitable for horn loaded or bass reflex designs
  • Lightweight neodymium magnet


21" / 530 mm

Coil Diameter

6" / 152 mm

Power Rating

1000 w (A.E.S.)

Frequency Range

30 Hz - 1 kHz


98 dB


10.5 mm
SKU: PDN.2151.8 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 PDN.2151

General Specifications
Type Sub Bass Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 21" / 530 mm
Voice Coil Diameter 6" / 152 mm
Peak Power (6 dB Crest Factor) * 4000 w (A.E.S.)
Power Rating 1 2 * 1000 w (A.E.S.)
Sensitivity (1W/ 1m) * 98 dB
Frequency Range 30 Hz - 1 kHz
Resonance 31.44 Hz
Voice Coil Winding Depth 30 mm / 1.18"
Recommended Enclosure Volume 130 - 350 Litres
Flux Density 1.1 Tesla
Magnet Material Neodymium
Magnet Gap Depth 15 mm / 0.59"
Former Material Glass Fibre
Dust Dome Material Paper
Voice Coil Material Copper
Cone Material Paper
Suspension Material Dual Fabric
Surround Material Fabric
Thiele Small Parameters
Fs 31.44 Hz
Re 5.35 Ω
Qms 18.3
Qes 0.28
Qts 0.28
Le (@ 1 kHz) 1.9 mh
Vas 303.35 litres
Mms 342.86 g
Sd 1698.23 cm2
Cms 74.67 µm/N
BL 35.86 T/m
Xmax 10.5 mm
Vd 1.76 litres
Ref. Efficiency 4.81%
EBP 112.28 Hz
Dimensions & Mounting
Overall Diameter 550 mm
Width Across Flats 532 mm
Flange Height 14 mm
Depth (Excl. Flange) 204 mm
Magnet Diameter 223 mm
Chassis Shoulder Diameter 492 mm
Outer Bolt Circle 6* M6 on 528mm PCD
Inner Bolt Circle N/A
Shipping Information
Nett Weight 16.3 Kg / 35.93 lb.
Shipping Weight 21.25 Kg / 46.85 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 (30 to 300 Hz) Program 2000 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 1000 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 PDN.2151

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.

2 reviews for PDN.2151

  1. francis

    I have 10 of them need recones and one of them the magnet has moved please advise

    • admin

      Please contact us or your local retailer to see if recone kits are available.

      If the magnet has shifted then the units cannot be repaired.

  2. Tony

    Hello I would have liked to buy 8 pd2151 in neodymium would it be possible thank you

    • admin

      Hi Tony,

      Thanks for you post. We have sent you an email to discuss this further.

Add a review

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

Got a question about the PDN.2151 ? Send us a message...

13 + 13 =

Pin It on Pinterest

Share This