amplifiers are more significant...
Hello PSS AUDIO;
I could'nt agree with you more! Last year my Marantz 300DC power amplifier developed a thermal runaway condition. After I repaired the problem and realizing how difficult it was to repair (typical of Marantz), I decided to replace all of the electrolytic capacitors. I then connected my CD player directly to the amp, not using the preamp. Not only was the sound clearer, but the bass was much deeper. I then connected the preamp (Marantz 3650) and the sound was not like it was when directly connected to the amp. I then replaced all the electrolytics as well as the resistors on the preamp board. The sound is now unbeliveable. As good as when I connected the CD player directly to the amp
I started out to repair the amp and I ended with a new amp.
JBL
Re: amplifiers are more significant...
Quote:
Originally posted by jbl
Hello PSS AUDIO;
I could'nt agree with you more! ... I then connected my CD player directly to the amp, not using the preamp. Not only was the sound clearer, but the bass was much deeper. ... I started out to repair the amp and I ended with a new amp.JBL
Hi!
I will even add that the use of a preamp is useless, unless you have a turntable.
Never forget that less components will be in the circuitry, better the sound quality can be.
That is why on the next studio amplifier (same amplifier than the audiophile model) there will be four inputs (one balanced using an XLR socket, one unbalanced using a combo XLR & RCA jack socket, and two RCA) with a good rotary switch and a good ALPS potentiometer before the power stage.
The trick is done and your CD player, receiver or whatever you use is directly linked to the power stage and there are no capacitors in the audio circuitry, it means that the amplifier is directly linked to your source (if ever there is some DC it will be detected and the output relay will disconnect the speaker from the amplifier).
If you are interested in, look at the schematic …
The sample I shipped in Australia and the one I am about to ship in Mexico have all those tricks unless the four inputs as the amplifier is made from the actual PCB used for our amplifiers.
amplifiers are more significant...
Hi Audio Geek,
Let me know how it sounds when you are done.
JBL
Re: Amplifiers are more significant than you may think!
Quote:
Originally posted by PSS AUDIO
Amplifiers are more significant than you may think!
the sound result is equal at your cheaper item...
Poor amp, cheap cable, wrong mechanical decoupling, wrong ac current, position, room treatement, oxidation, bad match, mis-interpretation for many other factor is direclty affect spectrum, speed, harmonic, phase response,
In General, the science is a big light in tunnel or 1000 astrology arguments...
ex: the tribo-electrical is possible to affect over 10% of signal by introdution of noise... ???
the tribo-electrical is one of big phenomenon affect amp, speaker and all items who cox cable appear.
This is a real reason the old Quad is entire attach cables inside amp. same reason who JBL put a great quantity of wax into part inside Old cross-over (3143 ex)... what is That ?? Any cable multibrin is fluctuate in impedance if vibration shake cable and unstabilise the tousand concact braid inside the cable. this fact is usually checked in insrumentation laboratory...
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Damping factor: is critical and yes the cable is affected the result.
tip of rule
the target market is critical:
put very low damping factor amp in mic and go karaoke... and look the firework.
Krell vs Crown Krell is elow 10 Damping factor and Crown is over 5000 Damping factor (varying at model) because Crown is amp for live music with very high incidence factor in mic membrane.
Krell is for audio playback amp.
SO
What is a better damping factor???
Well if you mixing console with monitor studio, you have interest to ear clearly where the position of input x is place in the image stereo: You choose hight damping factor...over 500. Because the harmonic is not critical (you have just verified with spectrum analyser the THD is below to the standart and that-it. (i build very ruff imgae just for this point)
Of course after the big orientation is found the variation determine the % allowed in fundamental reaction and extension of the harmonic...
More stiff, more smooth, more harmonic, poor image. Match cable, etc,
In this area the Flavour is appear at each Co...
I just finish this immense problem by conclusion of my exemple Krell if is connected at hight impedance cable the sound is completely different if your connect at very low Cable impedence....
One factor of mil spec is control test for tribo-electrical...
(and the war is continue)
yuk yuk
:die: