Talked to DD today - DDZ Things

[Johnny Law.Lulz 5,000+ posts]

My opinion is that he was probably blowing hot air up your ***... I cannot see a sub not using a topplate... there is the stellus topology, but that is a different kind of animal all together, and to the best of my knoledge never took off..
I have no experience with the Z but from the photos I see it sure looks like they use a steel topplate...

I told him flat out hat i would never pay that much for a Z so he really didnt have a reason to. Either way, i figured id share it with the forums.

 

[DonH 5,000+ posts]

Konaki = DD = AQ
All the same, just made in different locations.

by far the WORST info ever....

 

[Kyle_Keating 10+ year member]

IA's marketing lit is misleading, there is NOT gapplate on the 99Z because its a radial motor like the Aura 1808 or the new TC 5100. The fact of the neo magnet is the gap and the aluminum has nothing to do with the equation -its just a spacer for the basket. This has many distinct differences including a much more gap in terms of stray flux and much lower fringe field so if the coil is much longer than the radial gap it would actually be a linear motor. Radial also far less flux leakage losses especially when the magnets are kept thin. In fact in the case of the tc motors they are naturally shielded because almost all the flux is contained inside the motor and none leaks thu the air. The downside is you can't focus the field beyond the flux density off the magnet itself so for an overhung gap you pretty much need a very thick magnet (like the 99z) or just do an under hung design like the Aura or TC motors. the 99z is actually a very tall overhung gap and its thick such to make up as much BL coupling and flux density as possible.

bottom line, we don't actually know which motor is more powerful because for some reason the DDz and the Warden don't have posted TS params???

 

[T3mpest 10+ year member]

IA's marketing lit is misleading, there is NOT gapplate on the 99Z because its a radial motor like the Aura 1808 or the new TC 5100. The fact of the neo magnet is the gap and the aluminum has nothing to do with the equation -its just a spacer for the basket. This has many distinct differences including a much more gap in terms of stray flux and much lower fringe field so if the coil is much longer than the radial gap it would actually be a linear motor. Radial also far less flux leakage losses especially when the magnets are kept thin. In fact in the case of the tc motors they are naturally shielded because almost all the flux is contained inside the motor and none leaks thu the air. The downside is you can't focus the field beyond the flux density off the magnet itself so for an overhung gap you pretty much need a very thick magnet (like the 99z) or just do an under hung design like the Aura or TC motors. the 99z is actually a very tall overhung gap and its thick such to make up as much BL coupling and flux density as possible.
bottom line, we don't actually know which motor is more powerful because for some reason the DDz and the Warden don't have posted TS params???

lol if SPL subs have T/S parameters companies would have to actually know a bit more about what they are doing than some internet companies do (not naming names). Also it would demyistify some of the "our woofers are loud because we say so) crap that many companies pull.

 

[JL Audio 5,000+ posts]

lol if SPL subs have T/S parameters companies would have to actually know a bit more about what they are doing than some internet companies do (not naming names). Also it would demyistify some of the "our woofers are loud because we say so) crap that many companies pull.

this is invalid, the pups are unbeatable, no matter what their specs say. That is all.

 

[Johnny Law.Lulz 5,000+ posts]

I will be posting T/S specs for a Warden soon.

 

[Haunz 10+ year member]

IA's marketing lit is misleading, there is NOT gapplate on the 99Z because its a radial motor like the Aura 1808 or the new TC 5100. The fact of the neo magnet is the gap and the aluminum has nothing to do with the equation -its just a spacer for the basket. This has many distinct differences including a much more gap in terms of stray flux and much lower fringe field so if the coil is much longer than the radial gap it would actually be a linear motor. Radial also far less flux leakage losses especially when the magnets are kept thin. In fact in the case of the tc motors they are naturally shielded because almost all the flux is contained inside the motor and none leaks thu the air. The downside is you can't focus the field beyond the flux density off the magnet itself so for an overhung gap you pretty much need a very thick magnet (like the 99z) or just do an under hung design like the Aura or TC motors. the 99z is actually a very tall overhung gap and its thick such to make up as much BL coupling and flux density as possible.
bottom line, we don't actually know which motor is more powerful because for some reason the DDz and the Warden don't have posted TS params???

View attachment 26517447

This is the aura driver I believe kyle is talking about.. you can see there is still a topplate (outer casting) to complete the circuit, but it's behind the neo slug which is charged through its thickness...

The DDZ has no steel outside of the neo to complete the circuit, and it still looks to me to have a steel topplate... that is all I would say without having a Z motor in my hands...

 

[abrhino 10+ year member]

They have a new policy because stupid people would buy recones and mess them up and expect free recone kits.

people were reconing Konaki's and AQ HDC3s with DD parts.. trying to pass the franken subs as DD and trying to get DD quality subs for a fraction of the cost. DD also stopped selling to individuals. you must be a store front owner , and they're now stressing the 50mile radius. This is why I went DC. I was going to order a 9512G, and some 2515s direct (like i always have) and got shot retail prices. Jack informed me of the policy change.Didnt seem to matter that he pulled my reciepts and i had ordered $3400 worth of stuff, only $1000 less than the nearest DD dealer within the same time frame.

 

[MaximusCarAudio 10+ year member]

doesn't the sub from Shocker (brazil) have the neo setup like the Z? Its said to be as strong and the cone looks like the older DD9900 yellow twin layer vacume cones they used. I was a big DD dealer but dropped the line a few years back so I am out of the loop on DD. I am just picking the line back up as a per customer reqest type of thing. Non of my customers are spl people they just want daily drivers loud as hell and I have been using Atomic and doing well. By chance what are 9515f subs with carbon fiber dust caps worth? They need reconing. I have 4 kicking around I boke the neckjoints and then the coils failed right after when I ran a DD Z1 to each one daily... =)

 

[orangecounty1 10+ year member]

What i was told today by Brad over at DD was that the piece of aluminum on the DD's is not a top plate and the DD Z's do not need a top plate. The piece that appears to be a top plate just stablizes the motor.

Permendur top plate

Says top plate on their site. Why did he tell you it's "not" a top plate?

/thread.

 

[abrhino 10+ year member]

good point

 

[thericanballer 10+ year member]

lol, why am I not surprised by this?
I'd own a Warden before a DDZ, but that's just me.

i agree

 

[sundownz Pro Seller]

Says top plate on their site. Why did he tell you it's "not" a top plate?
/thread.

Don't believe ANYTHING on the DDZ product page... FYI... it's all made up as a joke.

First sentence... "The Z series represent the pinochle of transducer archeology. " -- there are two "errors" in the first sentence as a joke already.

The DD-Z does not have a "top plate" -- there is an aluminum plate bolted up there... which is a shorting ring / structural part to hold the motor together and mount the basket.

The Z has a steel back plate and steel pillars that come up to the aluminum plate... then the neo magnets are mounted to the inside of the pillars at the top -- the magnetic flux goes from the neo to the pole piece without using a top plate.

IA argues that this leaves spots on the coil which are not immersed in the flux field as the magnets are not touching each other side to side -- there are gaps between the chunks of neo.

 

[Bobby322 10+ year member]

konaki is a fake of AQ, which is a fake of DD. Or the other way around. Who wants a fake, fake?

 

[orangecounty1 10+ year member]

fack!