Hi Jwm,
As Mark says, the 4D is the Atmos rebadged for non-USA markets. The two models are identical, though I've seen European dealers claim otherwise.
Performance vs. the UNIverse? A search here will turn up a UNIverse owner who tried the Atmos/4D and went back to the UNIverse. Also, read the reviews next to my signature, which were the first ever written for either cartridge.
The Atmos/4D is a great cartridge that outplays all but a few competitors - but it does not outplay the UNIverse. Non-USA dealers have an incentive to say that because they can't sell you a UNIverse.
As to timing, a properly set up UNIverse will outplay every cartridge I've heard in this respect, including the Atmos.
Hope that helps,
Doug
As Mark says, the 4D is the Atmos rebadged for non-USA markets. The two models are identical, though I've seen European dealers claim otherwise.
Performance vs. the UNIverse? A search here will turn up a UNIverse owner who tried the Atmos/4D and went back to the UNIverse. Also, read the reviews next to my signature, which were the first ever written for either cartridge.
The Atmos/4D is a great cartridge that outplays all but a few competitors - but it does not outplay the UNIverse. Non-USA dealers have an incentive to say that because they can't sell you a UNIverse.
As to timing, a properly set up UNIverse will outplay every cartridge I've heard in this respect, including the Atmos.
Hope that helps,
Doug