Why Sir, you never seen a cracked cylinder wall ?
(us big marine diesel block boys use sleeves)
(us big marine diesel block boys use sleeves)
It certainly is. You won't see it in an unmodified engine usually, but shade tree engineers break blocks all the time. It's a badge of honor, because it "proves" that your ride makes a lot of power (not always the reason why 😉 ) and then you get to spend three grand for a new, custom alloy block (which comes with bragging rights of its own).
Can you not see the analogy to modifying a 200 watt amp to produce 500 watts? Have you ever seen a broken transistor case? If not, look inside a blown car amplifier. You will probably find a smoked power supply switching transistor,
The car was sold 5 years ago, sorry.
Good morning 🙂
The problem is maybe that i am not a typical consumer
When i see tone controls i am disappointed because i think to all the effort to design and to build a circuit that is detrimental to sound
If you look at high-end units it is difficult to find tone controls
So for me this is a waste of resources plain and simple. Better is pure sonic perversion.
Moreover I guess that around there are units without these damned current limit circuits and i am pretty sure that they sound very good indeed
http://it.akg.com/tl_files/catalog//harman-kardon/Home/Manuals/Stereo%20Components/HK%20980/Owner%27s%20Manual%20-%20HK%20980%20%28English%20EU%29.pdf
Actually i have at hand an half destroyed HK670 that is miles ahead the Nad in terms of dynamic ,,, there is no comparison
I hope to save the power amp stage for using it as a power amp
Maybe sometimes they even blow out with fire
I would prefer to have to listen to music with a fire-extinguisher by side than listen to music that never come alive
Thanks again and kind regards,
gino
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Yes why ? 🙂
I mean, let's take the supposedly very best units ,,, and search for tone controls
No trace at all, as it should be
I would even put the two channel in different boxes
Dual mono everything
Kind regards, 😀
gino
Most of the people here fall in that category, including me.
When people see what I do, they want me to design and build them custom this and that. Then I tell them the price and they forget about it. 😀 I do not have the resources of a manufacturer; even a small one. I cannot beat them at their game.
A typical home setup requires tone controls. I use tone controls too. 😱 If you don't like them, buy a unit that has a tone defeat switch.
And if you think that a system automatically sounds "better" without tone controls, then you do not understand physiology and psychoacoustics. Do you think that our ears are perfect instruments?
No tone controls is a gimmick. "High-end" consumers are for the most part every bit as brainwashed and deluded as your typical consumer. Why else would they pay hundreds of $$$$ for speaker wires and other silly snake oil gadgets? Why do some people pay ten times as much for a capacitor that is nothing but a rebadged run of the mill component? Why do people think that "silk impregnated paper dielectric" and "gold ensconsed this and that" make any difference? It's marketing to the gullible with too much money is all that it is.
I don't know exactly what you mean by "pure sonic perversion", but I think the only way to obtain it is to hire the musicians to come to your house to provide you with a personal performance. That would be a wiser investment than silk empregnated paper dielectric capacitors with gold ensconsed electrodes and $300/ foot speaker cables.
By the way, you never told us the reason the other amplifiers were destroyed.
even then, unless its a purely acoustic unplugged performance, there is a very good chance the engineer would use.... EQ to correct for the room response error. A live performance in your house, unless you have a perfectly set up room, it would not be accurate. A well built room would contain what is effectively physical tone controls (bass traps, diffusers etc); if not it would very likely be wrong.
this whole notion of purity of sound through omission is quite strange IMO
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And this i understand! a serious correction in the listening room
But what two silly pots one for bass and one for highs can do for room correction ? Nothing
You need maybe a digital equalizer or something like that
There is a world of difference between a serious correction of the response in the listening room and the tone controls on a commercial amp
and you know better than me, so why defend those controls ? 😕
Regards,
gino
Well you're absolutely correct about this.
Some graphic equalisers come with a microphone and a correction gizmo display so that you can achieve the "true" frequuency response with your system and room. I have set up a few of these for people (it's real easy 😉 ) and guess what? Nobody liked the way it sounded. Nobody!
Does this setup correct for phase and time delay errors? No it does not. In fact it introduces more phase and time delay errors! Does it optimise response for the whole room? No it does not; it only optimises for one listening location. Does it compensate for our far from perfect auditory physiology? No way.
There is no such thing as "pure response" for most types of music. You are in pursuit of unobtanium, Gino. And you are totally ignoring physiology and psychoacoustics as well.
My advice to you is simple. Save your money and buy a Krell. Then design a hard wired frequency compensation circuit that is customised for your system and your listening environment. Then see if you like it.
Gino, you might be interested in Rod Elliott's research and innovations. Mr. Elliot took off his nerd glasses and designed tone controls that are more suited to our actual audio perception- how revolutionary! 😉
Hi-Fi Preamplifier
That's something that you should think about.
Hi-Fi Preamplifier
That's something that you should think about.
Do you mean bass and highs ? i cannot believe 🙄
If you want room correction there are much better equipment
You cannot do this acting on just two fixed frequencies
I stand on my point. Much better nothing
And what is the sense to have tone control when I use always the defeat button ?
no of course
This is an interesting point of view. I still think that some high end equipment do sound very good because i listened to them
Expensive yes, bad no.
Equal to other commercial and cheaper units maybe 😱
because one thing is a serious room EQ and another the usual tone controls
If I wanted a room EQ i would buy one of those new digital EQ and put it the audio chain.
This would be a more reasonable solution
By the way i am not sure that also this EQ units are always without drawbacks
But the fact that my room is far from perfect i have heard just with a sweep
Maybe i should think to this EQ ... but not tone controls 🙁
And regarding the live effect i heard it .... it can be done. Not easily by the way
I heard for instance a impressive and realistic performance listening to these one
I will explain a little ...
My never ending nightmare is the line preamp
For me it is like a cornerstone .. but i had difficulties to get one right
As is not easy to listen without buy/building etc. i had an idea
Select a very good headphone amp and use it as a line preamp
I have a nice pair of Beyerdynamic to use as a testing tool
The problem with HP amps is the gain ... too high for a line stage
So i took a Rotel amp and replaced the feedback resistor to reduce the gain of the amp.
Then i start listen ,,, very bad sound
As the lid was off i put a hand on the fins ... 😱 burned fingers (what a pain)
and of course all the output bjts fused
Another one i tried to increase cap but then i see thin wire in the high current paths ,,, a old pioneer .. clearly a poor unit and so it went in the garbage
In another old one i broke a pcb
Sometimes i see pcb of kits and they appear to me so much superior in quality compared to what i find in cheap amps
Even for high current paths they use thin wires, like 0,5 sqmm
And it is not finished ... my friend call me demolition man
Regards,
gino
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Look buddy, I agree with you on this point. Don't you get it?
I am 100% sure that they always have drawbacks. Are you reading what I write, or am I wasting my time with you?
Now I am beginning to understand why you blow stuff up. Why do you think it had "very bad sound"? Why do you think you burned your fingers on the heatsink? Until you can answer these questions you are flying blind.
There's ways around everything, but I commend you for realising that you are polishing turds.
You do make some great observations. I think you have to design and build your own equipment to be satisfied. Might I suggest obtaining a master's degree in electrical engineering?
these look more as exceptions. The tone controls do not have reason
They are completely useless for room correction
The Cello unit anyway is something more than a couple of pots of low quality actually
For room EQ it seems that everyone is using digital units nowadays
Regards,
gino
Far and away the single easiest thing to design and build in the entire audio chain, assuming your goal is to have the output sound identical to the input when evaluating with ears only.
Sorry, but do not tone controls introduce similar errors as well ?
I don't understand what they can cure
Do you mean that a mic is flat and the ear not ?
My advice to you is simple. Save your money and buy a Krell. Then design a hard wired frequency compensation circuit that is customised for your system and your listening environment. Then see if you like it.
I agree that the room effect is very negative. I heard very strong resonances doing the sweep. Very bad actually
I wonder if people do this simple test and what they get in their rooms
Speaking of the power amp i am fine now.
Not so for the line stage
Still an open issue.
After this I can study at that compensation circuit
Thanks again for the very helpful advice.
Regards,
gino
1987, 100 Years Yamaha, CX-10000 preamp : CX-10000 YAMAHA HiFi-Do McIntosh/JBL/audio-technica/Jeff Rowland/Accuphase
(10k retail then, free SM now on the web)
"high-end units" usually are "exceptions".
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