[Jukebox-list] Speaker connection

[Wesley Dean]

    It is a common mistake for people to confuse AC impedance with DC resistance.  Audio speakers are classified by impedance, not resistance. The impedance of a system varies with the resonant frequency. Inverse feedback in the amplifier is there to correct any mismatch. That is why the fader control varies the total volume and not the quality. Wes 
----- Original Message ----- 
From: "Francois Villeneuve" <francois.v at videotron.ca>
To: "Jukebox mailing list" <jukebox-list at lists.netlojix.com>
Sent: Monday, September 18, 2006 10:47 PM
Subject: RE: [Jukebox-list] Speaker connection


Thanks Joey for the input,

I do have the manual and connected the speakers as per the manual.

When I measure resistance on the speakers disconnected, I get something like
14 ohms, but when I do measure them connected as per the manual, I get 7.3
ohms.  According to the manual, I think the total load at the speaker
terminals on the amp should be of 8 ohms.  So this portion seems ok.

Now, the amp was just rebuilt (all caps changed including filters),
installed a new Pickering NP/AC cartridge (two grounds connected together
and two signals connected together).  The output of this cartridge is rated
at 10mV, one of the highest outputs out there.

I just installed 2 new Svetlana EL34 and all other tubes checked good
(according to the reliable guy who rebuilt the amp)

The sound is very good but seems a bit too low, even at MAX.  The phono
switch is set at Phono only.  Now this is the first time I hear a 1468, so
may be this is normal but it is certainly much lower than all my other jukes
(1700, 1428, 1100, 100C).

Any suggestions as to where I should look ?

Thanks in advance
Bye  :-)
Francois

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