Major help needed in Input and output impeadance..

Not necessarily so Matrix.The standard output voltage of most cd players is 2 volts. The standard input voltage is 1.5 to 2 volts on most amplifiers. I've seen amplifiers that need 4 volts to get full power from the unit(the designer claimed quieter operation this way). You should be able to get 10 volts from the preamp using a 2 volt source without problems.The preamp may start at just a 10th of a volt and go up from there on the volume control.You really should be fine with the preamp. As far as the crazy specs go.IMHO the 200 khz is pretty meaningless. Most of us male humans can't hear past maybe 18khz ..I dont know though some audiophiles do claim to hear like bats ..LOL.

The variation of dbs from point to point would also have more meaning for me.For example frequency response from 10Hz to 20khz +/- 3db or better is very good.Some may claim +/- 1 dB variations..it doesn't get much better than this. Most highend speakers don't achieve such a flat response anyway. The only commercial speakers I've seen claim close to this are the Green Mountain Audio speakers(after hearing them I believe it to). Even then once you get in the lower bass region the variations still drop to +/- 3dB..which ain't bad at all. There should be a certain amount of rolloff to get the correct decay and timbre of certain instruments IMHO.

Gmood1, Thanks I do understand the standard is 2 volt, but I can assure that my Wadia CD player in fact puts out the pro audio standard voltage of 4 volt at the RCA's As well as XLR, as why it much more full and powerful sounding than most players. As for speaker frequency, Mine Go 16hz to 25,000hz, no problem there either, whether it can be proven we hear or feel it is another story, but I guess the frequency's exist thats why they have products built beyond the call of duty. Not sure why but all the top manufactures flagship Preamps are in the 10hz or even 5hz up to 100 khz, or 200 khz, is it necessary? , probably not but I guess these are the flagship specs. cause yes the run of the mill and even fairly high end pieces only claim 20 hz to 20 khz... Who knows, but thanks I will see what this preamp does I was just concerned of the impeadance match, but it should be okay.

Hi Matrix,
I have no doubt the Wadia puts out up to 4 volts I was more or less talking about why 2 volts is more than sufficient in real world applications.Sorry you may have misunderstood me.As far as those flagship specs go.Look a little deeper and you'll see equipment that's not held as flagships (because of price)that have these qualities.IMHO it's more to do with well engineered gear than it having a flagship stamp.Not sure if the Wadia has this feature. But if you want fuller sound and dynamics have a modifier to put inline output transformers(bypassing the caps or op amps on the analog output of the player).That's if it uses dual differential Dacs like some Denon,Pioneer and Esoteric players.. This is what gives you the full potential of the player's dynamics and transparency.Most stock equipment regardless of cost doesn't have this.You will find it in some DIY gear though..since manufacturing cost isn't an issue.

Well enough babbling on my part... enjoy the new preamp.

Good listening

I know what your saying, I just was reiteratting the fact for some reason the "Flagship" pieces seem to spec. frequency out of this world, whether it will help anything is another question. Actually thats funny I did just have the Wadia modded, with a new clock all caps replaced with Rubycon Cl/Cz (supposedly better than Blackgates, but Rubycon makes the blackgates so I don't know), WBT next Gen jacks, Silver Rectifier bridges etc... and they told me the output stage in the wadia is about as simple as it gets with one Opamp and thats it, they believe it is very good analog out stage already, but could get the silver transformers put in but we are talking a 1000.00 mod, and I am skepticle going that far to be honest.
Thanks for the tips, I hope the Preamp works out Too!

Voltage-gain/sensitivity issues are different than impedance 'matching'. The rule of thumb on output/input impedances, the original issue, is 1:20. The 'rule' indicates that if the 2 impedances are at a ratio of at least 1:20, the preamp will be able to deliver full Voltage into the amp. If the ratio is less than 1:20, the preamp MAY not be able to deliver full Voltage and/or the preamp/amp system may be more susceptible to the characteristics of interconnect cables than we'd like.

600 Ohms:20K-Ohms is a ratio of 1:33 and should present NO Voltage-delivery or cable-dependency problems.

GENERALLY, one would like very low output impedances and relatively high input impedances, but there are tradeoffs to both. Tubes, generally, are high-impedance devices, and some designers and audiofools believe there are compromises inherent in the use of cathode followers, the most-common method of reducing output impedance.
.