Pre-amp newbie question


Hi,

I've recently returned to vinyl after a long hiatus. Please excuse my naiveté on the subject of pre-amps but back in my younger days I couldn't afford such equipment and never really researched it. Now, I constantly have the upgrade bug. My question is: Would I hear a big difference by by-passing my stereo pre-amps phono stage and going with a dedicated phono pre?

I currently have a Rega P3/24 with a Dynavector 10x5. Further down the chain is a Parasound P7 pre-amp and Parasound A21 Amp. The phono stage of the P7 is MM/MC with input impedence of 47k and 100 ohms respectively. With the high output Dynavector the sound is remarkably good but could it be better with a dedicated phono pre-amp?

I'm looking at a Musical Surroundings Phonomena II which has multiple settings for impedence and gain and is compatible with both MM and MC (high and low) carts.

Embarrassingly, the whole subject of ohms, loading and gain confuses the heck out of me so any input would be greatly appreciated.
mjm1124
One of the many benefits of AudiogoN is buying used equipment to evauluate and re-sell if it the equipment is not satisfying. You should be able to buy a reasonably priced phonomena II on this site. Everyone has opinions and they all.. are subject to their personal experiences. Those experiences may or may not be relevant to you. In your room, with your favorite music, on your system, you are best off trusting what you hear with your ears. Take some time and try different equipment.

Cheers
"Dedicated phono stages are better than built in ones"

I don't know how you can make an unequivocal statement like that. Also, one has to pay for the replication of a power supply, case, etc., and a built in phono sections can be very good. It depends on the designer. I much prefer the phono board in my BAT pre to the outboard models I've tried (Rogue and Dynavector.)
I agree with Daverz; whether an outboard phono stage is better than what you're using now is something you'll need to determine by listening. For example, I found the Grado phono stage to be better than the built-in stage of my LK1 preamp, but not quite as good as the phono stage in my Audio by Van Alstine OmegaStar PAT-5 (when using a Grado Green cartridge; I did end up buying a Grado PH-1 so I could try Grado's low output cartridges, which my OmegaStar lacks the flexibility to support).

The Dynavector P-75 sounded good, but no better than the built-in stage of a Linn Wakonda I was auditioning at the time (comparison made with 10X5 cartridge), and I didn't like the combination of the 10X5/P-75 as well as the less costly Grado Green/PH-1 set.

I've only heard the Musical Surroundings Phonomena II in a dealer showroom and it impressed me as a good-sounding phono stage with lots of flexibility, but I didn't compare it with anything familiar to me. If at all possible, compare it to what you're using now before making a purchasing decision.
The reason I can say it is because it is true.No preamp can have the space to to contain phono stages like the two I use , one of which weighs 75 pounds by itself and the other 50. The best phono stages are all stand alone ones, the Dynavector is better than the phono stage in my $5000 integrated amp, which was in Stereophile's Class A when it was in production. If you look at ARC, Conrad Johnson, Boulder ,Naim, etc, all their top preamps are line stages without phono stages. The Rogue and Dynavector, while good , are not among the top phono stages. My best phono stage cost over twice as much as my line stage, both originally and when I purchased them used. It is true that you can save money by having a built in phono stage and they can be quite good but the highest level of performance will be from separate stages.
I second the Ray Samuels Audio F-117 Nighthawk phono stage for $795. It's a great little unit and very easy to use and adjust from the rotary front-panel controls. You won't be disappointed...