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The one exception on TRS wiring
01/13/2000

If you ever get the opportunity to write and edit any sort of column (electronic or otherwise), you will learn very quickly to avoid the words "always" and "never" because there's "always" an exception somewhere. Last week I said that tip is always hot in a TRS connector (TTOTD 1/5/2000). It only took one day for someone to e-mail me the exception. While I wasn't really surprised there was an exception; the product did amaze me.

Tony Brooke of Silent Way Recording (check out his Web site, it has a lot of cool technical stuff on it) informed me, and I have confirmed, that on the original Mackie CR-1604 (not VLZ or VLZ Pro) the left and right main outputs are wired with ring hot and tip cold. All other connections (including the balanced mono out) are wired as you would normally expect. The obvious question is, why? But I haven't bothered to try to find that out. It is what it is. Anyone using an original CR-1604 beware.





Other Techtips from January 2000:
January 31 - CD burning issues
January 28 - Live miking and mixing with multiple microphones
January 27 - Fundamentals of Noise Reduction
January 26 - Kurzweil Output Architecture
January 25 - Mixing virtual tracks into a MOTU 2408
January 24 - Running wires through sound proof walls
January 21 - Miking an upright piano
January 20 - More on hard drive head crashes
January 19 - Reversing pins 2 & 3 in an XLR cable, what does it do to Phantom power?
January 18 - Pin 2 versus Pin 3 at mic inputs
January 17 - Where have the analog mixers gone?
January 14 - How does increasing amp power affect SPL?
January 13 - The one exception on TRS wiring
January 12 - Get line level signals into a mixer without line inputs
January 11 - Magnetic Fields from unshielded monitors and your cassette deck
January 10 - Keeping rooms isolated that have wire runs between them
January 07 - More on cable wiring - balanced to unbalanced
January 06 - More on wiring unbalanced and balanced connections
January 05 - Wiring XLR to TRS connectors and reversing polarity for pin 3 hot
January 04 - More info on cable polarity and how to wire for various circumstances
January 03 - Getting that R & B booming bass drum sound


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