2. amps-preamps
  3. 136563-1506

preamp inverts polarity

I have a DeHavilland Ultraverve 3 preamp that inverts polarity.
my problem is my speaker cables, the negative cable is designed for negative terminal connection as is the positive cable is designed for positive terminal connection, so reversing the speaker cables defeats the design of the speaker cables.

what am I to do ?
mboldda1

Showing 2 responses by thom_at_galibier_design

thom_at_galibier_design's avatar
thom_at_galibier_design
729 posts
 
Three things i don’t believe were mentioned.

Some folks don’t hear phase reversals - even those with golden ears. You might be one of those lucky individuals.


Secondly, do we know that your amplifier doesn’t invert polarity? You might have two inverting components which net out to non-inverted.

Finally (and building on the second point), you need to take the entire signal chain into consideration - your digital front end as well as your phono section.
For each source selected, add up the total number of gain stages. An even number means non-inverting and an odd number means inverting.

It could end up (for example) that running through your digital front end, the signal is inverted and through your phono section, it’s non-inverted (or vice-versa).

BTW, I’m one of the lucky ones ;-)

Cheers,
Thom @ Galibier Design
thom_at_galibier_design's avatar
thom_at_galibier_design
729 posts
 
@ kosst_amojan - of course you’re correct (definitions of polarity vs. phase). By the time I noticed the typo, the 30 minute edit window had expired. It never pays to post before going to bed ;-)

@ geoffkait absolutely (with respect to how media is recorded). This might be the biggest factor as to why so many folks don’t "hear" polarity reversals.  They doubt their perception - as much because of inconsistencies in recordings as any other factor.

Cheers,
Thom @ Galibier
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