P-Audio Replacement 8 Ohm Diaphragm For BM-D750 and BM-D740

Official manufacturer's replacement diaphragm for P-Audio compression drivers.

This 8 Ohm diaphragm is an exact fit and replacement for the P-Audio BM-D750 (Mk 1) and BM-740 compression drivers.

This diaphragm is also used in the following speakers/parts:

P-Audio Co-Ax BM12 CX38, BM12-CX38, BM12CX38
P-Audio Co-Ax BM15 CX38, BM15-CX38, BM15CX38
TurboSound RD210 RD-210
TurboSound CD210 CD-210
TurboSound RD212 RD-212
TurboSound CD212 CD-212
TurboSound TXD252 TXD-252
TurboSound TXD15M TXD-15M
P-Audio 740, 740-8
P-Audio BMD-740, BMD 740, BMD-740-8, BMD740, BMD740-8
P-Audio 750, 750-8
Mackie SRM450 Diaphragm DC10/1701-8 0008093 some models ONLY - most use DT027 diaphragm
Fane CD.280 Compression Driver


Voice coil diameter 72mm
Frame diameter 110mm
Diameter at outside edge of contact terminal lugs 142mm
Distance between centres of contact terminal 122.5mm
Contact terminal lug width 19.5mm
Frame thickness 4.2mm
Voice coil length (below lower face of frame) 3.5mm
Dome height (above rear face of frame) approx. 10.5mm

This diaphragm is not suitable for the newer BM2-D740 and BM2-D750 compression drivers with adjacent, "side-by-side" input terminals, the input terminals are diametrically opposite on this diaphragm. Click here for the BM2-D740 and BM2-D750 diaphragm.

PLEASE NOTE - You will need appropriate skills and product knowledge in order to fit this replacement part correctly. We do not provide a consultancy service or fitting advice for this product - this is a replacement part intended for professional use only.

Technical skills are required for fitting, do not attempt diaphragm replacement if you don't know what you are doing! Replacement diaphragms are classed as consumables and we are therefore unable to offer returns on these items.

Before buying this item, please ensure that the diaphragm you have looks EXACTLY the same as the one illustrated. If you have any doubt, please contact our Sales Team to ensure you are buying the correct item. Cabinet and speaker manufacturers often change driver suppliers and speaker suppliers during manufacturing and retain the same cabinet model number. We highly recommend that you remove your old part, and compare the diaphragm to the image and dimensions before ordering.

Our database has the following results for compatibility of this product with common speakers and components.

Turbosound TXD-15M CD212 RD212 | Tweeter Diaphragm | Aftermarket
Turbosound TXD 252 CD210 RD210 | Tweeter Diaphragm | Aftermarket

Our database of parts includes a wide range of products, and in many cases offers cost effective alternatives for repair. Alternatives are loosely grouped into three types:

Original - Usually an exact match to the original product, and just the 'standard' part from the factory which gets rebadged by manufacturer with their own brand and part number. Occasionally, there are subtle tweaks made from the standard part, but its virtually impossible for us to determine this. If we have listed the part as Original, it means we are confident the performance is the same.
Aftermarket - Aftermarket parts often become available from factories in the far east once the original part is no longer manufactured. They are intended to be a close match, and provide a cost-effective alternative.
Equivalent - These are alternative options, which provide very similar performance, but are not the same as the original. In some cases the performance may actually be improved. We have used both our own experience, and feedback from customers in generating list of alternatives. Alternatives like this are useful when the original part is no longer made, there is no aftermarket option, so the only choice is to upgrade with the nearest current equivalent product.