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#1
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Hi,
I've read a bunch of posts regarding the differences between tube and transistor mic preamps. Apparently, circuit design and component quality has more to do with the sound than the tube vs. solid state issue. I've even read many posts saying that there is no "tube sound". But I would guess that there are many well respected people out there who would beg to differ, (*don't* quote me on this), possibly Doug Fearn, Aspen Pittman, Oliver Archut, etc., who might even say that tubes make better preamps. On the other hand, there might be people out there which we all respect and they believe the best products are solid state preamps. Is there a global difference between top-of-the-line tube preamps and top-of-the-line solid state preamps that can be put into words? I know that all preamps are different, but if a recording (in my case, live in-the-studio local pop/rock bands) was done through a variety of great tube pres, ie. Vipre, Fearn, Pendulum, Tab-Funkenwerk, etc., what kind of difference could I expect in my recording processes and finished products vs. doing the same recordings with a variety of great solid state preamps, ie. Neve, API, GML, Great River, etc.? I'm sure they'd be quite different, but how? Thanks, Gord |
#2
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Gord wrote:
I've read a bunch of posts regarding the differences between tube and transistor mic preamps. Apparently, circuit design and component quality has more to do with the sound than the tube vs. solid state issue. I've even read many posts saying that there is no "tube sound". Right. But I would guess that there are many well respected people out there who would beg to differ, (*don't* quote me on this), possibly Doug Fearn, Aspen Pittman, Oliver Archut, etc., who might even say that tubes make better preamps. They make different preamps. And of the three folks you list, they all make preamps that sound radically different than one another. On the other hand, there might be people out there which we all respect and they believe the best products are solid state preamps. No, the best product is the one that fits your particular application on a particular track on a particular song. If everybody wanted the same thing, they wouldn't have to make so many kinds. Right now, the most neutral-sounding preamps happen to be solid state ones, although Fred Forssell is definitely in the running with a very neutral tube preamp. I tend to be a fan of neutrality in preamps myself. Others aren't. Is there a global difference between top-of-the-line tube preamps and top-of-the-line solid state preamps that can be put into words? I know that all preamps are different, but if a recording (in my case, live in-the-studio local pop/rock bands) was done through a variety of great tube pres, ie. Vipre, Fearn, Pendulum, Tab-Funkenwerk, etc., what kind of difference could I expect in my recording processes and finished products vs. doing the same recordings with a variety of great solid state preamps, ie. Neve, API, GML, Great River, etc.? Most of the preamps you describe are colored preamps, and most of them are designed for particular coloration. And yes, they all sound different. Not different enough to be religious about it, but different enough that if you had a varied selection, you'd want to use different preamps on different tracks. I'm sure they'd be quite different, but how? You need to listen to the Boston Pre Party CD, or to Lynn Fuston's preamp shootout CD. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#3
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#4
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On Mon, 6 Dec 2004 22:24:32 -0500, play-on wrote
(in article ): On 6 Dec 2004 22:00:52 -0500, (Scott Dorsey) wrote: Right now, the most neutral-sounding preamps happen to be solid state ones, although Fred Forssell is definitely in the running with a very neutral tube preamp. I had a Forsell pre for awhile, and it may have been neutral but it definitely had a different quality than a solid state pre, "sweeter" somehow, especially on the high end. It was a pretty sound but I actually preferred the accuracy of solid state when comparing it to my Great River MP2H, & I eventually sold the Forsell. Al Define sweeter. Is it relative to salt, sour or sugar? I see sweeter too frequently and most of the time it seems to mean "I like it." I think we could all do with a little less "sweeter." Ty Ford -- Ty Ford's equipment reviews, audio samples, rates and other audiocentric stuff are at www.tyford.com |
#5
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On Tue, 7 Dec 2004 00:41:55 -0500, Ty Ford
wrote: On Mon, 6 Dec 2004 22:24:32 -0500, play-on wrote (in article ): On 6 Dec 2004 22:00:52 -0500, (Scott Dorsey) wrote: Right now, the most neutral-sounding preamps happen to be solid state ones, although Fred Forssell is definitely in the running with a very neutral tube preamp. I had a Forsell pre for awhile, and it may have been neutral but it definitely had a different quality than a solid state pre, "sweeter" somehow, especially on the high end. It was a pretty sound but I actually preferred the accuracy of solid state when comparing it to my Great River MP2H, & I eventually sold the Forsell. Al Define sweeter. Is it relative to salt, sour or sugar? I see sweeter too frequently and most of the time it seems to mean "I like it." I think we could all do with a little less "sweeter." sweet ( P ) Pronunciation Key (swt) Pleasing to the senses; agreeable: the sweet song of the lark; a sweet face. Pleasing to the mind or feelings; gratifying: sweet revenge. Having a pleasing disposition; lovable: a sweet child. ----------------------------------------------------------------- What adjectives to you prefer, since I have no lab to test these things in. The top end on the Forsell sounded more liquid somehow, a bit softer, the detail ever so slightly more blurred sounding. To me. Al |
#6
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![]() In article playonATcomcast.net writes: sweet ( P ) Pronunciation Key (swt) Pleasing to the senses; agreeable: the sweet song of the lark; a sweet face. Pleasing to the mind or feelings; gratifying: sweet revenge. Having a pleasing disposition; lovable: a sweet child. Yeah, I know a mic preamp just like that. C'mon, that doesn't say anything about frequency response, distortion products, or stray noises. -- I'm really Mike Rivers ) However, until the spam goes away or Hell freezes over, lots of IP addresses are blocked from this system. If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo |
#7
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On Tue, 7 Dec 2004 17:22:14 -0500, play-on wrote
(in article ): sweet ( P ) Pronunciation Key (swt) Pleasing to the senses; agreeable: the sweet song of the lark; a sweet face. Pleasing to the mind or feelings; gratifying: sweet revenge. Having a pleasing disposition; lovable: a sweet child. ----------------------------------------------------------------- What adjectives to you prefer, since I have no lab to test these things in. The top end on the Forsell sounded more liquid somehow, a bit softer, the detail ever so slightly more blurred sounding. To me. Al Al, Sweeter tells me you like it (presuming you like sweets). You're on the right track with the above. This is something I have worked on for years; how to describe sound with any sense of accuracy. My lab is my ears. Soft, hard, brighter, cleaner, quieter, more aggressive, focused. These are some of the term in my very unofficial glossary. Lot of times I'll compare two or more mics to help with pinning down what the one I'm reviewing sounds like. If the reader knows what Mic A sounds like, maybe that'll help with explaining Mic B. Regards, Ty Ford -- Ty Ford's equipment reviews, audio samples, rates and other audiocentric stuff are at www.tyford.com |
#8
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I've got 7 Forssell channels here (a CS-1 and a JMP-6 prototype-I've also
demo'ed the FEtcode and it's a wonderful sounding circuit too) I've also got a GR MP2-MH. I hate trying describe the sonic qualities of preamps, so please excuse the audio porn analogies I'll be making, but I did a shootout between the JMP and the GR a while back reamping a recorded source through a pair of ADS 1520's into a Stephen Paul U87 (3 micron) which was palced about 7 feet in front of the ADS' speakers about 4' off the floor. The recorded source was *Forget About It* by Allison Krause. Lots of ear candy as far as well recorded and mixed acoustic instruments. I'd also describe the Forssell as *sweet/warm with a softer top end, (the JFet circuit I figure)* and the GR as *sweet/accurate with a bit more open top*, but both are in that same sonic big league. I've got a CD of that test around here somewhere. Doug Joyce http://www.graphicresultsofdurango.com/musicstudio.html "Ty Ford" wrote in message ... On Mon, 6 Dec 2004 22:24:32 -0500, play-on wrote (in article ): On 6 Dec 2004 22:00:52 -0500, (Scott Dorsey) wrote: Right now, the most neutral-sounding preamps happen to be solid state ones, although Fred Forssell is definitely in the running with a very neutral tube preamp. I had a Forsell pre for awhile, and it may have been neutral but it definitely had a different quality than a solid state pre, "sweeter" somehow, especially on the high end. It was a pretty sound but I actually preferred the accuracy of solid state when comparing it to my Great River MP2H, & I eventually sold the Forsell. Al Define sweeter. Is it relative to salt, sour or sugar? I see sweeter too frequently and most of the time it seems to mean "I like it." I think we could all do with a little less "sweeter." Ty Ford -- Ty Ford's equipment reviews, audio samples, rates and other audiocentric stuff are at www.tyford.com |
#9
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On Tue, 7 Dec 2004 23:19:16 -0700, "Animix"
wrote: I've got 7 Forssell channels here (a CS-1 and a JMP-6 prototype-I've also demo'ed the FEtcode and it's a wonderful sounding circuit too) I've also got a GR MP2-MH. I hate trying describe the sonic qualities of preamps, so please excuse the audio porn analogies I'll be making, but I did a shootout between the JMP and the GR a while back reamping a recorded source through a pair of ADS 1520's into a Stephen Paul U87 (3 micron) which was palced about 7 feet in front of the ADS' speakers about 4' off the floor. The recorded source was *Forget About It* by Allison Krause. Lots of ear candy as far as well recorded and mixed acoustic instruments. I'd also describe the Forssell as *sweet/warm with a softer top end, (the JFet circuit I figure)* and the GR as *sweet/accurate with a bit more open top*, but both are in that same sonic big league. I've got a CD of that test around here somewhere. Uh huh uh huh... you said the "s" word... sweet. Al Doug Joyce http://www.graphicresultsofdurango.com/musicstudio.html "Ty Ford" wrote in message ... On Mon, 6 Dec 2004 22:24:32 -0500, play-on wrote (in article ): On 6 Dec 2004 22:00:52 -0500, (Scott Dorsey) wrote: Right now, the most neutral-sounding preamps happen to be solid state ones, although Fred Forssell is definitely in the running with a very neutral tube preamp. I had a Forsell pre for awhile, and it may have been neutral but it definitely had a different quality than a solid state pre, "sweeter" somehow, especially on the high end. It was a pretty sound but I actually preferred the accuracy of solid state when comparing it to my Great River MP2H, & I eventually sold the Forsell. Al Define sweeter. Is it relative to salt, sour or sugar? I see sweeter too frequently and most of the time it seems to mean "I like it." I think we could all do with a little less "sweeter." Ty Ford -- Ty Ford's equipment reviews, audio samples, rates and other audiocentric stuff are at www.tyford.com |
#10
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Is there a global difference between top-of-the-line tube preamps and
top-of-the-line solid state preamps that can be put into words? BRBR No. The differences between the top-of-the-line tube preamps (& between the top solid state pres) will be as great as the differences between top tube & solid state gear. Scott Fraser |
#11
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On Mon, 6 Dec 2004 23:43:14 -0500, ScotFraser wrote
(in article ): Is there a global difference between top-of-the-line tube preamps and top-of-the-line solid state preamps that can be put into words? BRBR No. The differences between the top-of-the-line tube preamps (& between the top solid state pres) will be as great as the differences between top tube & solid state gear. Scott Fraser As I mentioned before; good tubes are better than bad solid state. Good solid state is better than bad tubes. Ty Ford -- Ty Ford's equipment reviews, audio samples, rates and other audiocentric stuff are at www.tyford.com |
#13
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On Tue, 7 Dec 2004 00:14:59 -0500, DeserTBoB wrote
(in article ): On 6 Dec 2004 18:19:12 -0800, (Gord) wrote: But I would guess that there are many well respected people out there who would beg to differ, (*don't* quote me on this), possibly Doug Fearn, Aspen Pittman snip Aspen...snicker! Ho boy, now THERE'S some snake oil for ya! HAR! dB The GT tubes in my recently restored Fender amps tell a different story. Ty Ford -- Ty Ford's equipment reviews, audio samples, rates and other audiocentric stuff are at www.tyford.com |
#14
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Gord wrote:
Hi, I've read a bunch of posts regarding the differences between tube and transistor mic preamps. Apparently, circuit design and component quality has more to do with the sound than the tube vs. solid state issue. I've even read many posts saying that there is no "tube sound". If you want to be pedantic, there *is* a tube sound, a bipolar transistor sound and a *fet* sound. This arises from their different 'transfer characteristics'. No gain device is linear. The non-linearities produce audible effects such as distortion. Tubes and fets produce mainly even order distortion products whereas bipolar transistors produce mainly odd-order distortion. There is one *big* caveat. A single bipolar transistor stage can provide much more gain than a tube ( or fet ) stage. This allows use of local negative feedback to reduce it's THD. Transistors are so much cheaper ( especially when within an IC ) that it's no problem to use lots of highly linearised transistor stages to produce vanishingly small amounts of distortion. This can be achieved through local and / or global feedback. In comparison, it isn't really practical to do this with tubes. Note that feedback isn't a bad thing like some audiophools ( who wouldn't understand technology if you whacked them round the head with it ) suggest. Even valve ( oops tube ) circuits use feedback. But I would guess that there are many well respected people out there who would beg to differ, (*don't* quote me on this), possibly Doug Fearn, Aspen Pittman, Oliver Archut, etc., who might even say that tubes make better preamps. On the other hand, there might be people out there which we all respect and they believe the best products are solid state preamps. For a mic pre-amp, a critical factor is the noise figure. Suitable bipolar transistors ( and some fets ) have such low noise figures that it's possible to directly ( a.c. ) couple the mic to the active devices and get super noise figures. By their nature, tubes do not perform so well with regard to voltage noise. To get a really quiet tube pre-amp you *have* to use an input transformer. Transformers have a whole stack of deficiencies of their own. This has to be considered in the context of a tube pre. Is there a global difference between top-of-the-line tube preamps and top-of-the-line solid state preamps that can be put into words? I know that all preamps are different, but if a recording (in my case, live in-the-studio local pop/rock bands) was done through a variety of great tube pres, ie. Vipre, Fearn, Pendulum, Tab-Funkenwerk, etc., what kind of difference could I expect in my recording processes and finished products vs. doing the same recordings with a variety of great solid state preamps, ie. Neve, API, GML, Great River, etc.? I'm sure they'd be quite different, but how? Transistor mic pres don't need input transformers. Tube ones do. That alone is likely to colour any comparison. Choose one you like. Graham |
#15
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On Tue, 07 Dec 2004 08:09:47 +0000, Pooh Bear
wrote: Transistor mic pres don't need input transformers. Tube ones do. Naw. |
#16
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On Tue, 7 Dec 2004 07:48:52 -0500, John La Grou wrote
(in article ): On Tue, 07 Dec 2004 08:09:47 +0000, Pooh Bear wrote: Transistor mic pres don't need input transformers. Tube ones do. Naw. and will someone please hand me a KleenWipe to remove the coffee from my screen. Ty -- Ty Ford's equipment reviews, audio samples, rates and other audiocentric stuff are at www.tyford.com |
#17
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Pooh Bear wrote:
If you want to be pedantic, there *is* a tube sound, a bipolar transistor sound and a *fet* sound. This arises from their different 'transfer characteristics'. No gain device is linear. The non-linearities produce audible effects such as distortion. Tubes and fets produce mainly even order distortion products whereas bipolar transistors produce mainly odd-order distortion. This is a horrible oversimplification, though. A pentode has a totally different transfer characteristic than a triode. A triode set up as a cathode follower has a totally different transfer characteristic than one set up for voltage gain. All of these tube circuits sound totally different... so how can we say there is a "tube sound." --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#18
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Scott Dorsey wrote:
Pooh Bear wrote: If you want to be pedantic, there *is* a tube sound, a bipolar transistor sound and a *fet* sound. This arises from their different 'transfer characteristics'. No gain device is linear. The non-linearities produce audible effects such as distortion. Tubes and fets produce mainly even order distortion products whereas bipolar transistors produce mainly odd-order distortion. This is a horrible oversimplification, though. Is it horrible ? It's a simplification for sure but at least it gives the OP some ides of the factors involved which is what I thought he was enquiring about. I also avoided mentioning ICs much. A pentode has a totally different transfer characteristic than a triode. Perfectly true. And of course all the tube nuts now seem to like to triode connect their pentodes it seems. Maybe it's flavour of the month ? A triode set up as a cathode follower has a totally different transfer characteristic than one set up for voltage gain. For a mic amp most of the work is the voltage gain. I'm sure a cathode follower would be nice on the output but don't even get me started on the limitations of 'single ended' followers. A sad limitation of tubes is the absence of the complementary pair. All of these tube circuits sound totally different... so how can we say there is a "tube sound." 'Cos the market says so ? I have played iwth the idea of simulating a 'tube sound' just using a fet but I'm sure the tube fans want a real fire bottle. Graham |
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On Wed, 08 Dec 2004 05:41:34 +0000, Pooh Bear
wrote: I have played with the idea of simulating a 'tube sound' just using a fet but I'm sure the tube fans want a real fire bottle. Not yet mentioned is a qualitative fundamental difference between junction transistors and field effect devices (both semiconductor and non-conductor-hot-cathode): BJT's have an intrinsic granularity caused by their integer number of injected electrons or holes. For some microphone level signals and typical beta's, this might become an audible issue. Field effect devices' granularity goes way down into the spooky-physics level. Not all that many years ago, some tree-hugging types were making a related argument for tape head amplifiers and phono cartridge amplifiers. Of course, nobody cares about those things anymore. Chris Hornbeck "Shi mian mai fu" |
#20
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![]() Chris Hornbeck wrote: On Wed, 08 Dec 2004 05:41:34 +0000, Pooh Bear wrote: I have played with the idea of simulating a 'tube sound' just using a fet but I'm sure the tube fans want a real fire bottle. Not yet mentioned is a qualitative fundamental difference between junction transistors and field effect devices (both semiconductor and non-conductor-hot-cathode): BJT's have an intrinsic granularity caused by their integer number of injected electrons or holes. At the atomic level for sure ! Have you recently checked the charge on an electron ? Quantum effects are present in all devices if you want to labour the point. Your point is largely spurious. The method of control of current is interestingly different but please don't labour the point. I suppose you'll be counting the *exact* number of electrons passing from cathode to plate next ? Ooops - that implies quantisation - i.e 'granularity' too ! LMAO ! For some microphone level signals and typical beta's, this might become an audible issue. Field effect devices' granularity goes way down into the spooky-physics level. Not all that many years ago, some tree-hugging types were making a related argument for tape head amplifiers and phono cartridge amplifiers. Of course, nobody cares about those things anymore. They were nuts. Graham |
#21
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#22
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In article znr1102506973k@trad, Mike Rivers wrote:
In article writes: I have played iwth the idea of simulating a 'tube sound' just using a fet but I'm sure the tube fans want a real fire bottle. MXL displayed a new line of solid state mics at the AES that they say accurately emulate the sound of tube mics - whatever that is. I think the big deal as far as a microphone goes is that the input capacitance of a FET changes with modulation. You can think of the FET junction as being like a varactor diode. This is less of a problem than it used to be with the 2SK170 available now, and it's much less of a problem with a cathode follower, but it's still a measurable and probably audible effect that does not happen with a tube impedance converter stage. So, this is a coloration that solid-state systems have which tubes do not, and so emulating the "tube sound" in this regard involves eliminating a coloration effect, which is a hard thing to do. There are some tube mikes, like the U47, which have considerable nonlinearity in the gain stage itself, due to the way the tube stage is built. But this is not typical of tube designs and I'd consider it a disadvantage, personally. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#23
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Transformers have a whole stack of deficiencies of their own. This has to
be considered in the context of a tube pre. This is truth but you negleted to mention that in many cases, transformers, or at least GOOD trannies, sound great! In fact it can be argued that the transformer(s) are as much of the sound as the tubes are. -jeff |
#24
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![]() Handywired wrote: Transformers have a whole stack of deficiencies of their own. This has to be considered in the context of a tube pre. This is truth but you negleted to mention that in many cases, transformers, or at least GOOD trannies, sound great! In fact it can be argued that the transformer(s) are as much of the sound as the tubes are. It is indeed possible to make a *good* transformer. As opposed to a *bad* transformer. I have indeed used several from OEP ( Oxford Electronic Products ) and Sowter ( E.A Sowter Ltd ) in some of my products. They are far from being linear devices though. They are bedevilled with classic transformerish problems like handling low frequencies at high level ( for starters ). Do they contribute to the sound ? I bet they do ! I prefer direct coupling myself. Graham |
#25
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I prefer direct coupling myself.
Graham I like both, though the only time I tried to couple the outputs through caps, by the time i got really good polypro caps big enough, I almost might as well bought a transformer g! But seriously, I would not want to live without either option in the racks... |
#26
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#27
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#28
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![]() "Mike Rivers" wrote in message news:znr1102420267k@trad... With only a few exceptions, there is someone who loves every preamp ever made. Well, then, it seems pretty clear that - just to be contrary - someone here should go on record as *hating* every preamp ever made... who's it gonna be? Huh? C'mon, somebody step up to it! ![]() Neil Henderson |
#29
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![]() "Mike Rivers" wrote in message news:znr1102420267k@trad... With only a few exceptions, there is someone who loves every preamp ever made. Yes, ... but not at the same time. RD |
#30
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Neil Henderson wrote:
"Mike Rivers" wrote in message news:znr1102420267k@trad... With only a few exceptions, there is someone who loves every preamp ever made. Well, then, it seems pretty clear that - just to be contrary - someone here should go on record as *hating* every preamp ever made... who's it gonna be? Huh? C'mon, somebody step up to it! That's probably me, but I hate speakers and microphones much more. Only live music is any good at all. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#31
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Scott Dorsey wrote:
That's probably me, but I hate speakers and microphones much more. Only live music is any good at all. Even if you can't hear the vocals, or the flute player, etc.? I.m.o. there are things done in the studio that make the music sound better. And better is good. |
#32
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On Wed, 08 Dec 2004 10:00:16 -0600, Jazz Meister
wrote: Scott Dorsey wrote: That's probably me, but I hate speakers and microphones much more. Only live music is any good at all. Even if you can't hear the vocals, or the flute player, etc.? I.m.o. there are things done in the studio that make the music sound better. And better is good. "Better" is subjective. |
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#34
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Gord wrote:
Is there a global difference between top-of-the-line tube preamps and top-of-the-line solid state preamps that can be put into words? I know that all preamps are different, but if a recording (in my case, live in-the-studio local pop/rock bands) was done through a variety of great tube pres, ie. Vipre, Fearn, Pendulum, Tab-Funkenwerk, etc., what kind of difference could I expect in my recording processes and finished products vs. doing the same recordings with a variety of great solid state preamps, ie. Neve, API, GML, Great River, etc.? you might find out if you buy my TAB/Telefunken V76m preamp, which is still on Ebay for 20 hours #3863756738 ;-) regards Peter |
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