ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: Mackie SRS1500  (Read 517 times)

Michael Lawrence

  • Newbie
  • *
  • Offline Offline
  • Posts: 48
Mackie SRS1500
« on: June 02, 2018, 05:51:28 pm »

Once upon a time, when I was but a wee lad mixing on the local audio provider's PA system, I had two thoughts about the Mackie SRS1500s:
  • These things seem like a big ol' pile of 63Hz.
  • I don't think the polarity switch does anything.
I thought at the time that the polarity function (more accurately, lack thereof) was just a problem with our specific models.

Fast forward to today, when I decided to measure one, with the polarity switch in both positions:

The amplitude traces are offset slightly for clarity.

Clearly, the polarity switch is just there to look pretty.

Can anyone shed some light on this?
Logged

Art Welter

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1363
Re: Mackie SRS1500
« Reply #1 on: June 03, 2018, 01:23:06 am »

I thought at the time that the polarity function (more accurately, lack thereof) was just a problem with our specific models.
Clearly, the polarity switch is just there to look pretty.

Can anyone shed some light on this?
Michael,

The manual states:
"PHASE
This switch reverses the polarity of the signal at the HIGH PASS OUTPUT jacks."


The "PHASE" switch has no effect on the THRU jack, wired straight from the FULL RANGE INPUT connector, so switching it would have no effect on your measurement.

Art
« Last Edit: June 03, 2018, 01:38:36 am by Art Welter »
Logged

Michael Lawrence

  • Newbie
  • *
  • Offline Offline
  • Posts: 48
Re: Mackie SRS1500
« Reply #2 on: June 03, 2018, 09:23:28 am »

Michael,

The manual states:
"PHASE
This switch reverses the polarity of the signal at the HIGH PASS OUTPUT jacks."


The "PHASE" switch has no effect on the THRU jack, wired straight from the FULL RANGE INPUT connector, so switching it would have no effect on your measurement.

Art

A ha! Mystery solved. That certainly explains it. See what happens when you ASSume?

Many thanks, good sir.

EDIT: Though I will say, that seems odd. A local polarity control seems much more useful. But I guess you have to ask yourself how often people use the SRS1500 for cardioid arrays.
« Last Edit: June 03, 2018, 09:28:06 am by Michael Lawrence »
Logged
Pages: [1]   Go Up
 


Page created in 0.031 seconds with 20 queries.