What part of the diaphragm? That is a replacement for a Western Electric 555. It's the only one I know of besides maybe some of the Japanese exotic stuff that uses that 2 section diaphragm shape, but lots of the old Altec drivers have a tangential surround. More common is a simple dome with some sort of surround. Common surrounds are tangential, half-roll, diamond, and flat plastic of some sort.
ShinOBIWAN said:
For 15hz you'll only need one thats about, off the top of my head, 80ft long
Actually, it would 'only' have to be about 39.3ft long. Exit of the driver is 130mm so that sets the throat, 15hz flair, M~0.7, 8'x8' mouth. That's one example. However if you went for a 7hz horn but kept the same mouth size, then you'd hit 84' in length.
454Casull said:
Only based on mechanical limits - the thermal power handling is typically better at LF due to more convection cooling of the coil. However the excursion limited power handling is totally dependant on the load the driver has (ie, the horn) so it's kind of silly to discuss power handling of just the driver. You need to look at the system.
Q from 454Casull Advantages/disadvantages to each type?
The compression driver does not need a lot of travel, and needs to be kept low in mass.
That style of construction allows a 1 piece stamping, ie no adheasive to secure a surround.
Moving coil microphone diaphrams are made much the same way.
I think the "compression" drivers not made that way are existing dome tweeters with a horn stuck on the front. Some work OK, but not in the same league as the "real" ones.
Hope that answers your question.
Geoff
The compression driver does not need a lot of travel, and needs to be kept low in mass.
That style of construction allows a 1 piece stamping, ie no adheasive to secure a surround.
Moving coil microphone diaphrams are made much the same way.
I think the "compression" drivers not made that way are existing dome tweeters with a horn stuck on the front. Some work OK, but not in the same league as the "real" ones.
Hope that answers your question.
Geoff
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.