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Conrad-Johnson It just sounds right

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  #161  
Old 12-30-2014, 12:26 AM
bgiliberti bgiliberti is offline
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Originally Posted by Forte 4A View Post
I just took home an ET3 SE for a home demo. The biggest problem I've had has been a rather noisy hiss coming from the speakers. So I'm reluctant to buy. When I give it back to the dealer tomorrow I'll see if the hiss is still there.
Can't speak specifically to the ET3 SE, but the ET-3 regular had a normal, slight tube rush, as does my CJ Classic SE. Can't really hear it more than a few feet away. But, just a question -- is there a separate tube for each channel in the ET-3? If so, I would think that a bad tube would hiss in one channel only. I surmise that you hear it on both. I don't know the circuit topology of the ET-3. I do know that they now use just one tube in the Classic SE, when they used to use 2, one per channel. Could be the same in the ET-3. They have tube diagrams on the CJ website.
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  #162  
Old 12-31-2014, 03:34 PM
ronenash ronenash is offline
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Quote:
Originally Posted by Forte 4A View Post
I just took home an ET3 SE for a home demo. The biggest problem I've had has been a rather noisy hiss coming from the speakers. So I'm reluctant to buy. When I give it back to the dealer tomorrow I'll see if the hiss is still there.
What you are hearing is a bad tube. An ET3 SE with a good low noise tube is super quiet.
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  #163  
Old 01-01-2015, 01:19 PM
Forte 4A Forte 4A is offline
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The dealer told me it was an impedance problem between my modified Threshold T-50's and the CJ. We hooked up the ET-3 at the store w/a Bryston 4B Amp, and a pair of Aerial 7T's. Dead quiet. Excellent sound.
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  #164  
Old 01-01-2015, 07:09 PM
pkelly1504 pkelly1504 is offline
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I have an ET3 SE also. It has a hiss on the right side which in my opinion is too loud & I find it bothersome. I replaced the tube 10 months ago with A Gold Lion Genalex tube. It helped a bit when 1st replaced but is now louder than ever. Any suggestions or should I look to replace the unit? An issue is the dimensions of The ET3 SE as it fits perfectly in my custom made cabinet.
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  #165  
Old 01-02-2015, 12:05 AM
ronenash ronenash is offline
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Quote:
Originally Posted by Forte 4A View Post
The dealer told me it was an impedance problem between my modified Threshold T-50's and the CJ. We hooked up the ET-3 at the store w/a Bryston 4B Amp, and a pair of Aerial 7T's. Dead quiet. Excellent sound.
I don't think the ET3 has an impedance problem as it can drive any power amp with ease. I am pretty sure you Threshold has a much higher gain than the Bryston and/or the speakers are more sensitive and thus you hear the noise more. Tube noise will not be effected by volume setting. The more sensitive your amp and speakers are the more pronounced the noise will be.

Using a good tube my ET3 did not show any noise even with high gain amps and high efficiency speakers.
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  #166  
Old 01-02-2015, 12:07 AM
ronenash ronenash is offline
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Originally Posted by pkelly1504 View Post
I have an ET3 SE also. It has a hiss on the right side which in my opinion is too loud & I find it bothersome. I replaced the tube 10 months ago with A Gold Lion Genalex tube. It helped a bit when 1st replaced but is now louder than ever. Any suggestions or should I look to replace the unit? An issue is the dimensions of The ET3 SE as it fits perfectly in my custom made cabinet.
Try a 7dj8/pcc88 tube in the ET3. They will last longer. The Phillips PCC88 is great and not expensive.
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  #167  
Old 01-02-2015, 10:36 AM
bgiliberti bgiliberti is offline
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Originally Posted by ronenash View Post
Try a 7dj8/pcc88 tube in the ET3. They will last longer. The Phillips PCC88 is great and not expensive.
Any similar recommendations for alternates to the NOS Mullard 8080s that come with the Classic SE? I really like the sound and they are good tubes for sure, but it might be fun to experiment a bit, just to see.
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  #168  
Old 01-02-2015, 07:36 PM
pkelly1504 pkelly1504 is offline
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Thanks for the advise!
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  #169  
Old 01-16-2015, 04:20 AM
noeljs noeljs is offline
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Default Phase invert

Hi all
I understand that with this pre amp we have to swap the speaker cables,
Will the sound differ if I leave it to the normal connections.
Why are CJ pre amp are phase inverts.

Thank You.
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