Measuring Loudspeakers, Part One Page 3

This series of articles was initially written (in slightly different form), as a paper presented at the 103rd Audio Engineering Society Convention, New York, September 1997. The preprint, "Loudspeakers: What Measurements Can Tell Us—And What They Can't Tell Us!," AES Preprint 4608, is available from the AES, 60 East 42nd Street, Room 2520, New York, NY 10165-0075. The AES internet site, offers a secure transaction page for credit-card orders.
Sat, 11/07/1998

COMMENTS
delmas's picture

It's best to keep in mind that if the ammeter you use is not a "true RMS" meter, it will have material errors in its RMS measurements. I could not tell the exact model number of the DMM you are using, so please make sure you look up its exact specs, and I recommend junking it if it's not a true RMS DMM - no need to include avoidable errors in your reviews.

John Atkinson's picture
delmas wrote:
I could not tell the exact model number of the DMM you are using, so please make sure you look up its exact specs, and I recommend junking it if it's not a true RMS DMM - no need to include avoidable errors in your reviews.

Both the Audio Precision analyzers and the Fluke 87 multimeter I use to produce Stereophile measurement sidebars are true-RMS-reading instruments. See, for example, https://physics.ucsd.edu/neurophysics/Manuals/Fluke/87______umeng0800.

John Atkinson
Editor, Stereophile

Pages

Measuring Loudspeakers, Part One Page 2

This series of articles was initially written (in slightly different form), as a paper presented at the 103rd Audio Engineering Society Convention, New York, September 1997. The preprint, "Loudspeakers: What Measurements Can Tell Us—And What They Can't Tell Us!," AES Preprint 4608, is available from the AES, 60 East 42nd Street, Room 2520, New York, NY 10165-0075. The AES internet site, offers a secure transaction page for credit-card orders.
Sat, 11/07/1998

COMMENTS
delmas's picture

It's best to keep in mind that if the ammeter you use is not a "true RMS" meter, it will have material errors in its RMS measurements. I could not tell the exact model number of the DMM you are using, so please make sure you look up its exact specs, and I recommend junking it if it's not a true RMS DMM - no need to include avoidable errors in your reviews.

John Atkinson's picture
delmas wrote:
I could not tell the exact model number of the DMM you are using, so please make sure you look up its exact specs, and I recommend junking it if it's not a true RMS DMM - no need to include avoidable errors in your reviews.

Both the Audio Precision analyzers and the Fluke 87 multimeter I use to produce Stereophile measurement sidebars are true-RMS-reading instruments. See, for example, https://physics.ucsd.edu/neurophysics/Manuals/Fluke/87______umeng0800.

John Atkinson
Editor, Stereophile

Pages

Measuring Loudspeakers, Part One

This series of articles was initially written (in slightly different form), as a paper presented at the 103rd Audio Engineering Society Convention, New York, September 1997. The preprint, "Loudspeakers: What Measurements Can Tell Us—And What They Can't Tell Us!," AES Preprint 4608, is available from the AES, 60 East 42nd Street, Room 2520, New York, NY 10165-0075. The AES internet site, offers a secure transaction page for credit-card orders.
Sat, 11/07/1998

Recording of November 1998: Los Super Seven

VARIOUS ARTISTS: Los Super Seven
Radv/RCA Nashville 67689-2 (CD). 1998. Dan Goodman, exec. prod.; Steve Berlin, prod.; Dave McNair, eng.; Fred Rennert, Steve Gamberoni, asst. engs. AAD? TT: 41:36
Performance ****?
Sonics ****
Sat, 11/07/1998

A Note to International Subscribers

I have been informed that there was a serious error at the shipping department. The September and October issues of Stereophile and Stereophile Guide to Home Theater have been sent via a very slow shipping method. This was due to a misunderstanding between the magazines' new printer and the new subscription mailing house.
Wed, 11/04/1998

Joseph Audio RM22si Signature loudspeaker Chip Stern October 2002

You might recall that ditty from childhood about the little engine that could (I think I can, I think I can, I think I can...). It's an apt metaphor for high-end audio. In traversing the aural sepulchers of last winter's Consumer Electronics Show and the summer's HI-FI Show, I routinely encountered one divine sound system after another. Yet while I never tire of transcendent sonics, eventually I become inured to the procession of celestial, cost-no-object speakers. It's like having a white-light experience, then returning to the gritty reality of life on earth, where for most of us cost is not merely the object, but the determining factor in finding an optimal balance among audio components.
Wed, 11/04/1998

Joseph Audio RM22si Signature loudspeaker Measurements part 2

You might recall that ditty from childhood about the little engine that could (I think I can, I think I can, I think I can...). It's an apt metaphor for high-end audio. In traversing the aural sepulchers of last winter's Consumer Electronics Show and the summer's HI-FI Show, I routinely encountered one divine sound system after another. Yet while I never tire of transcendent sonics, eventually I become inured to the procession of celestial, cost-no-object speakers. It's like having a white-light experience, then returning to the gritty reality of life on earth, where for most of us cost is not merely the object, but the determining factor in finding an optimal balance among audio components.
Wed, 11/04/1998

Joseph Audio RM22si Signature loudspeaker Measurements

You might recall that ditty from childhood about the little engine that could (I think I can, I think I can, I think I can...). It's an apt metaphor for high-end audio. In traversing the aural sepulchers of last winter's Consumer Electronics Show and the summer's HI-FI Show, I routinely encountered one divine sound system after another. Yet while I never tire of transcendent sonics, eventually I become inured to the procession of celestial, cost-no-object speakers. It's like having a white-light experience, then returning to the gritty reality of life on earth, where for most of us cost is not merely the object, but the determining factor in finding an optimal balance among audio components.
Wed, 11/04/1998

Joseph Audio RM22si Signature loudspeaker Setup & System

You might recall that ditty from childhood about the little engine that could (I think I can, I think I can, I think I can...). It's an apt metaphor for high-end audio. In traversing the aural sepulchers of last winter's Consumer Electronics Show and the summer's HI-FI Show, I routinely encountered one divine sound system after another. Yet while I never tire of transcendent sonics, eventually I become inured to the procession of celestial, cost-no-object speakers. It's like having a white-light experience, then returning to the gritty reality of life on earth, where for most of us cost is not merely the object, but the determining factor in finding an optimal balance among audio components.
Wed, 11/04/1998

Joseph Audio RM22si Signature loudspeaker Specifications

You might recall that ditty from childhood about the little engine that could (I think I can, I think I can, I think I can...). It's an apt metaphor for high-end audio. In traversing the aural sepulchers of last winter's Consumer Electronics Show and the summer's HI-FI Show, I routinely encountered one divine sound system after another. Yet while I never tire of transcendent sonics, eventually I become inured to the procession of celestial, cost-no-object speakers. It's like having a white-light experience, then returning to the gritty reality of life on earth, where for most of us cost is not merely the object, but the determining factor in finding an optimal balance among audio components.
Wed, 11/04/1998

Pages