Audibile Illusions, Modulus 3 vs 3A

There is no comparison between the 3 and the 3A, they just look alike. Two different animals. Look up the reviews on the 3A.

I previously owned a Modulus 3 and purchased it from another Agoner who owned both models.
I asked him the same question and he prefered the older 3 modulus. He thought the 3A was not as musical (tube like) even though the 3A offered more detail. My AI preamp had a fresh quad of National 6922 tubes that only lasted about 200 hours. If you get an AI preamp be sure to use the Russian tubes which can take more abuse.

I owned a Modulus 3 for more than 10 years, then took advantage of the "factory upgrade" to get a new Modulus 3a made for me (took a good long time, too.)

The Modulus 3a does all the audiophile virtues better: much more extended highs, deeper bass, much more detail throughout the frequency spectrum. A lot like switching from a moving magnet cartridge to a moving coil.

That said, over time I think the Modulus 3 was more fun to listen to. About 75% of my listening is vinyl, and I really appreciate having a full-function preamp rather than a line stage with a phono amp too.

If I had to do it over again, I probably would never have done the upgrade, even though the 3A is probably better in most measurable ways.

Just my $.02

I own a 3A and I use NOS Mullard tubes that have lasted for years. The 3A is detailed. If you want the tube sound, you can't beat the older CJ's; PV10, PV11, or PV12.