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Re: CD Player - CD-A8T, Tube/Solid State HDCD
michael_d #170916 06/24/07 01:18 AM
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mdrew:
I understand the question, and never in my life have I heard of a combo amp/CDP in one package. I was ignorant of the fact that one could buy a combination amp/CDP in on package. Pls. give me some names, and my apologies will be fortcoming.

Re: CD Player - CD-A8T, Tube/Solid State HDCD
tamzarian #170917 06/24/07 01:21 AM
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nope, you missed that one. He wasn't talking about a combo unit, he was asking the same thing I did.


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Re: CD Player - CD-A8T, Tube/Solid State HDCD
tamzarian #170918 06/24/07 01:37 AM
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Quote:

To interface to a speaker you must provide:
1. low voltage
2. high current

which is opposite fo what a tube provides.




Both voltage and current are important.

An amplifier limited to a 5ARMS output will deliver 200W into an 8Ohm load regardless of the available voltage. Having more voltage available will permit the amp to drive more power into higher impedance loads (within the current output limit).

An amplifier limited to a 40VRMS output will deliver 200W into an 8Ohm load regardless of the available current. Having more current available will permit the amp to drive more power into lower impedance loads (within the voltage output limit).

I think what you meant to say is that tubes are better mated to higher impedance loads that require "less" current whereas solid state is better suited to lower impedance loads that demand "more" current.

Re: CD Player - CD-A8T, Tube/Solid State HDCD
Ken.C #170919 06/24/07 01:39 AM
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To answer mdrew and kcarlile, if you want "tube sound" you do not need a tube source. You only need a tube amp.

Re: CD Player - CD-A8T, Tube/Solid State HDCD
Ken.C #170920 06/24/07 02:00 AM
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kcarlile:

Thanks again for another lucid explanation. Would it be within your capacity to explain what you're talking about. You're giving everyone the impression that your're talking about a combo amp/CDP, and at the same time you're saying you're not. Is it too much trouble to to say what you're talking about?

Or perhaps when rational people explain things so they can be understood, you find it exhillirating to play the chase game. Earlier, I politely asked you for the benefit of the Forum to explain the nature of your comments/queries, but apparently that hasn't sunk in. I'm asking you again to be polite enough to explain answers or comments. Yes, some of us are so thick that we are in need of these explanations.

Re: CD Player - CD-A8T, Tube/Solid State HDCD
tamzarian #170921 06/24/07 02:09 AM
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Way to be condescending and superior at the same time.

Moreover, I wrote a further explanation in the other thread (which you thanked me for).
I didn't ever talk about a combo tube amp/CDP, you're mixing me up with your mixed up impressions of MDrew's comment.

What I'm saying is in the post above your last by Mojo, and I think you're the only one assuming the existance of a combination device.

You don't need a tube amp and a tube CDP to achieve tube sound; it seems to me that that would be redundant. That is what I'm saying, that's what Mojo's saying, that's what Mike is saying.

Spend your money how you want--obviously you're not interested in advice that contradicts what you've heard or read before.

Last edited by kcarlile; 06/24/07 02:12 AM.

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Re: CD Player - CD-A8T, Tube/Solid State HDCD
michael_d #170922 06/24/07 02:40 AM
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Mike, the basic object of an amplifier(or pre-amp)is to amplify without adding any audible sonic characteristic of its own(the proverbial "straight wire with gain"). If an amplifier doesn't meet that standard, then it doesn't fully qualify as a high fidelity component. Both transistors and tubes act as valves to measure out the amount of power needed, and correct tube design can be competitive with solid state design in achieving audibly flawless amplification. Using tubes doesn't necessarily cause a higher level of second harmonic distortion if a balanced push-pull configuration is used. The tube design would still have 3rd and other odd orders of distortion, but it might have an even higher 2nd order distortion if not designed to minimize it. This is apparent from lab tests on amplifiers, such as those on SoundStage, showing either higher or lower 2nd order distortion, depending on the total design, not whether tubes happen to be employed. As the Stereo Review amplifier test which has been frequently cited illustrates, there's no necessary "tube sound".


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Enjoy the music, not the equipment.


Re: CD Player - CD-A8T, Tube/Solid State HDCD
JohnK #170923 06/24/07 02:55 AM
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Quote:

...there's no necessary "tube sound".




What about during clipping?

Re: CD Player - CD-A8T, Tube/Solid State HDCD
Mojo #170924 06/24/07 04:56 AM
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Mojo:

This is exactly what I meant to say; the following quote from Mojo:

"I think what you meant to say is that tubes are better mated to higher impedance loads that require "less" current whereas solid state is better suited to lower impedance loads that demand "more" current."

Thank you for making this important correction.

Re: CD Player - CD-A8T, Tube/Solid State HDCD
Mojo #170925 06/24/07 01:16 PM
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Quote:

Quote:

...there's no necessary "tube sound".




What about during clipping?




This discussion been going on since the invention of the transistor. Some people make the curious and silly sounding statement that "tube watts" are more than "SS watts". What they are referring to is the soft clipping aspect of tubes that gently roll off sound rather than the hard clipping off the cliff, odd order harmonic and intermodulation distortion you hear when a SS amp clips.

Both technologies offer advantages and disadvantages when used in amplifiers or preamplifiers or hybrids. In my own still evolving view, a well designed audio component will shine regardless of whether its SS or tube based. Very generally speaking:

A solid state component will present the transient or attack far better than a tube based unit. The sense of , articulation and the way images are conveyed in space seem to favour SS. But the tube units because of their greater even order harmonics, especially second order, can have better low level detail and dynamics which can sound more natural. . When many people talk of tube sound they are likely referring to the decay, and continuious notes with more pronounced harmonics, which does make a more airy midrange. Many guitarists favour tube amps for this reason. Where tubes are generally inferior is in bass and LF reproduction which can sound loose and sloppy because of the greater decay and distortion compared to SS. As for HF reproduction, I have found them a mixed bag with siblance being more a problem with SS than tube designs but tube designs having more a tendency to roll off highs than SS.

Like alot of audio concepts we are talking shades of grey here and not absolutes, which is why I take pains to point out that these are generalizations at best and my own evolving observations. I have heard SS components that do sound "tube" like and vice versa. At the moment I'm trying to get the best of both technologies by running a tube Mcintosh 220 preamp into bridged SS Bryston 4bsst amps, so far with very pleasing results.


John
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