Parasound P/LD-2000 preamp mods?

One of the reasons that I bought mine was because I didn't think there was much that could be done to it. A company that I have used on other items says,

(Parasound equipment is usually of good circuit design. Beside normal component failure, the usual problems we see are related to soldering defects, some poor quality parts such as speaker relays, and loose push-on internal connectors. Parasound products generally have good quality parts in the audio path, so service is usually at a repair only level.)

I wonder what others have to say.

The P/LD-2000 does have some impressive circuit design such as dual mono topology, pure class A discrete circuitry, direct coupling, 92,000 uF of capacitance,etc., and pretty high quality parts such as lots of Black Gate capacitors, Nichicon Great Supply capacitors, Vishay resistors, etc., but, I do have to wonder about the silver-plated internal wiring, and the quality of some of the feed-back resistors, diodes, power transformer, bypass caps, etc.
I just wonder where the biggest weaknesses are, and which parts would bring the biggest improvements?

Daltonlanny,
The main sonic signature on the 2000 is derived from the use of the caps Parasound uses to bypass each electrolitic.

Upgrading those caps alone will help the 2000 a lot. Secondly, going through and replacing the metal film resistors with Vishay foil types will add more detail, depth, and drop the noise floor a significant amount.

Third, get rid of the walnut shell sized power transformer, and add an outboard 400-600VA type of your liking, toroid or E core. When you are done, you'll have an amazing sounding piece.

Fourth, replace the stock rectifier with a soft recovery type and replace the stock bypass caps with film and foil.

The sleeper of all time is their little Zpre. Sounds so-so stock, but once gone through, it becomes a true high resolution piece.

John

Thanks for your very detailed reply, John!
Lots of useful information in your post.