Wharfedale D613 woofer

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   Just wondering if anyone knows the basic specs of these OEM drivers (15in sub woofer with a cast basket).

I have 2 here. The cabs have lost their badges but I am guessing they are an LX15B.

One measures 7.2R and the other measures 2.9R.

The 7.2R driver is noticeably quieter than the other when given the same signal though otherwise they sound ok.

The client reports that 'they dont quite sound right'. 

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kedwardsleisure Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4811	Post Options Post Reply Quote kedwardsleisure Report Post Thanks(0) Quote Reply Topic: Wharfedale D613 woofer Posted: 22 May 2023 at 2:13pm
	Just wondering if anyone knows the basic specs of these OEM drivers (15in sub woofer with a cast basket). I have 2 here. The cabs have lost their badges but I am guessing they are an LX15B. One measures 7.2R and the other measures 2.9R. The 7.2R driver is noticeably quieter than the other when given the same signal though otherwise they sound ok. The client reports that 'they dont quite sound right'.
	Kevin North Staffordshire

jbl_man Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11056	Post Options Post Reply Quote jbl_man Report Post Thanks(0) Quote Reply Posted: 22 May 2023 at 8:38pm
	All i could find Kevin is it's a castframe woofer with 3 inch coil, rated at 700w, and is 8 ohms, so your 7.2r driver sounds right, the 2.9r would probably be 4 ohm, so somewhere along the way that 4ohm unit has been swapped or put in the wrong box?
	Be seeing you.

kedwardsleisure Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4811	Post Options Post Reply Quote kedwardsleisure Report Post Thanks(0) Quote Reply Posted: 22 May 2023 at 10:38pm
	I dont know. The boxes both have D613's in them. Wharfedale offered the cab in either a 4 or 8 ohm version but I'm sure they would have 4 or 8 ohm drivers in under different part numbers! I'm wondering if the wrong label has been stuck on one of the drivers. I suppose i could always order a new driver and then we'll know which one is the good one.
	Kevin North Staffordshire

cravings Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7389	Post Options Post Reply Quote cravings Report Post Thanks(0) Quote Reply Posted: 22 May 2023 at 11:50pm
	has one been reconed with a different impedence kit maybe?

kedwardsleisure Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4811	Post Options Post Reply Quote kedwardsleisure Report Post Thanks(0) Quote Reply Posted: 23 May 2023 at 8:31am
	I don't think so, no evidence of reconing, they both have a distinctive rough dustcap that looks like woodchip and the same cone pressing pattern. I measured the inductance and the '4R' one is lower than the '8R' one but not by much. I've decided the 4R one can't just be an 8R with shorted turns as it plays better and louder than the 8R one. The extra dc resistance of that coil is reflected in the higher inductance rather than say a poor braid wire which I've ruled out in any case.
	Kevin North Staffordshire