Lon
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"Love without guts is worthless!" Philip K. D*ck
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Hi Sam,
I do use a preamp with my Torii Mk II and my Torii Mk III. I generally use the CSP2 with my second system, driving the Mk II. I do this so that I can have three sources (two in the CSP2 and one into the Mk II direct) in that system. It does allow me great tailoring of the sound as well: balance control (needed in this system as the speaker placement is not ideal), tube-rolling frequency changes, and "riding the gain" (see below). In my main system, I use my PS Audio PerfectWave DAC as a source AND a preamp. I find that for Redbook (my most used source) having the Mk III all the way up or thereabouts and the DAC at 65 of 100 volume or so gets me a great open, deep, natural sound. Better than if i have the DAC maxed out and use the Mk III for volume control. This is in essence what Steve calls "riding the gain." I've posted a section of the ZStage manual below, this applies even more so to the CSP2 as youi can control input and output gain and there's that wonderful huge power supply in the CSP2. I would personally consider the CSP2 a top-notch preamp. What Steve says about preamps applies to the CSP2.
I have also used the CSP2 in the main system with the Mk III to ride the gain and it sounds great. . . . It's just not as necessary in that system as I have the preamp capababilities of the DAC, and it really is needed at the moment in the second system with the Mk II.
I suggest trying to "ride the gain"--that is the biggest advantage I see for you in using the CSP in front of the Mk III as you have a rotary switch box as well. If this makes an appreciable difference to the sound of the system, great! If not, put it on the shelf for a while.
THE MAGIC OF GAIN By now if you don’t own one of the rare amplifies that requires more than 2 volts to come to full power, you’re probably wondering what possible advantages could there be to using a ZSTAGE? Gain = Dynamics. The more dynamic your music is, the more real it will sound. Adding a ZSTAGE to your source will increase it’s dynamics and overall presence. In fact the difference can be such that the sound of your source will improve so much your thoughts about upgrading it will melt away. A customer recently purchased a new CD player of considerable cost and reputation to replace his existing player. The new player was better in every way and justified it’s much higher price. Then the player broke and the customer was forced to go back to his old player. Sadness... then he remembered he had a ZSTAGE in a different system, and placed it between his old CD player and his preamp hoping it would make it sound better. In fact it did, so much so that he could tell no difference between this combination and the new player he had. An example of how gain could save you a couple thousand dollars! RIDING THE GAIN A term we came up with because of the active nature of the adjustment process that can take place when you use a ZSTAGE in conjunction with an preamp OR amplifier fitted with a gain control. Riding the gain happens when you have two controls. One at the source and one at the amp or preamp. Think of it like water pressure. You have a pipe with a valve at the input end and another valve at the output end. The valves represent the gain controls and the pipe represents the signal path between the two gain gain controls. By turning up the input valve and turning the output valve down we create pressure inside the pipe. By turning down (closing) the input valve and turning up (opening) the output valve we reduce pressure inside the pipe. So if you took a garden hose and turned on the faucet you would have lots of water coming out the end, but it wouldn’t be able to spray anything until you put a nozzle on the end. The nozzle acts like a valve to restrict the output causing the pressure in the hose to increase. PRESSURE in this metaphor is the same thing as DYNAMICS in your stereo system.
FREQUENCY BALANCE By having a gain control at the source and a second one at the amp (or preamp) it is possible to manipulate the dynamics of your music and it’s overall frequency balance. For example, if the music sounds thin you can increase the “pressure” by turning down the gain control on the amplifier (or preamp) and then raising the gain control at the source. This will add noticeable weight to the music and mellow out the top end. On the other side, if the music is sounding boomy or thick, you can do the opposite - turn up the gain on the amp and reduce the gain at the source. The boominess will go away.
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« Last Edit: 03/07/12 at 12:07:53 by Lon »
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