Treker
Super Member
This is my third posting of a loudspeaker test and rankings article from the archives of Consumer Reports. This one is from the February 1976 issue, and includes several speakers that are favorites here on AK, such as the EPI 100, the KLH Model 6, and the Large Advent. And while I expect there will be some disagreement with the rankings in this particular report (for example, the Advent is ranked near the bottom), I hope that everyone will still find it interesting reading.
And now on to the article.
“Medium-Priced Loudspeakers”
“It’s easy to spend $600 or more on a pair or loudspeakers for a high-fidelity stereo system. But before you start thinking about spending more than $200 for speakers, consider how much you would really get for the extra money. The best speakers tested for this report would give most listeners about as much fidelity as they could want – and for only about $100 to $130 per speaker.”
ACCURACY IS THE KEY
“Far more meaningful than power of deep bass as a standard for judging speaker performance is accuracy, or fidelity, of reproduction. The ability to change electrical input signals into sound that corresponds almost exactly to them is, after all, virtually a definition of the high-fidelity loudspeaker’s job. Moreover, accuracy is one of the few objective standards for rating performance; differences in individual taste make it hard to say just how a good speaker should sound otherwise.”
“Most of the speakers demonstrated impressively high accuracy. The top-rated Avid 102 earned a higher score than any speaker we’ve every reported on; 91. But the EPI 100, with an accuracy score of 90, was virtually indistinguishable from the Avid in accuracy. Indeed, the first 11 speakers in the Ratings are within eight percentage points of each other. CU has found that even trained listeners can’t readily tell which of 2 speakers is more accurate when the two are eight points or less apart. That’s not to say those 11 models sounded alike; even models with identical accuracy scores sounded different from one another. One significant reason: Departures from accuracy that did occur came at different points on the musical spectrum.”
A SPECIAL CASE
“The subjective judgments of CU’s listeners have almost always corroborated out laboratory tests for accuracy. But this time, listening failed to confirm the high accuracy score (89) that our instrument tests recorded for the Micro-Acoustics FRM2. That speaker just didn’t sound as good to the listeners as did others with similarly high scores. The test data revealed the reason: a sharp rise in the midrange, from 1000 to 2500Hz, when measured directly in front of the loudspeaker. But that alone didn’t explain the panel’s observations: A contributing factor was ‘directivity.’ Between 1000 and 2500 Hz, the Micro-Acoustics beamed a very narrow cone of sound energy – much narrower than that beamed by the others speakers over the same frequency range. As a result, listeners at a ‘normal’ distance of eight to ten feet would hear these midrange sounds primarily as beamed from the speaker; they would hear little of that sound reflected from room surfaces. Such directivity would only exaggerate the effects of the speaker’s midrange sounds. It was those peculiarities that the listening panel picked up.
We therefore felt it would be misleading to let Micro-Acoustics’ high objective score stand. A statistical analysis of listening-test data showed that reducing the original score by four percentage points, to 85 per cent, would result in a score in line with our overall judgment of this loudspeaker.
It should be noted that the effect of this speaker’s high directivity would be much less audible in a very large room. Listening could be pleasant if you can sit at least 16 feet from the speaker; then you’d hear more reflected (reverberant) sound. The Micro-Acoustics’ anomaly was virtually inaudible in CU’s listening room from 20 feet away. The effect can also be reduced by angling the speaker toward a side wall.”
RECOMMENDATIONS
”Listeners looking for a fine loudspeaker at a moderate price should be quite content with any one of the 11 units with accuracy scores between 83 and 91, so long as the speaker’s power needs are suitable to the receiver to be used and to the listening room. All offered comparably high accuracy – albeit different sounds, as we’ve explained. Overall quality was a shade higher with models that finished high in the top 11: the Avid 102 ($130), the EPI 100 ($100), and the B.I.C. Venturi Formula 2 ($120). (Among those three, bass capability was superior with the Avid.)
Another fine speaker was the Marantz Imperial 5G, at $100. We check-tested its brandmate, the Marantz Imperial 5, which lists for $80. Though the cheaper model has a plainer finish and grill than the Imperial 5G, its high-accuracy performance was the same.”
“It’s best if you can audition speakers in the room where you plan to install them (they won’t sound quite the same anywhere else). So look for audio dealers willing to lend out speakers for a trial period – they do exist.
Chances are, though, you’ll have to listen in a dealer’s showroom. With luck it will have listening facilities acoustically shielded from outside distraction. And with luck it will have a way to switch almost instantly from one model to another; direct comparison between speakers is invaluable. But don’t compare more than two models at a time; stick with the preferred model and go on to the next.”
“Whether you can audition or not – you may not have the option – insist on return privileges. They’re your only salvation if you’re disappointed in the way a speaker sounds when you get it home.”
RATINGS
MEDIUM-PRICED LOUDSPEAKERS
“Listed in order of ability to reproduce sound accurately; models scored equal in accuracy are listed in order of increasing price. Differences of about 8 percentage points or less in accuracy are not readily resolved by ear (see story). Except as noted, all have a walnut-grain vinyl finish and balance control(s), if any, at the rear. Dimensions are in order of height, width, and depth. Prices are list, rounded to the nearest dollar; discounts are generally available. All were judged Acceptable.”
AVID 102 – Accuracy – 91%
EPI 100 – Accuracy – 90% - A Best Buy
B.I.C. VENTURI FORMULA 2 – Accuracy – 88%
MARANTZ IMPERIAL 5G – Accuracy – 87% - A Best Buy
LAFAYETTE CRITERION 2001 – Accuracy – 85% - A Best Buy
MICRO-ACOUSTICS FRM2 – Accuracy – 85%
REALISTIC OPTIMUS 5B – Accuracy – 84%
DYNACO A35 – Accuracy – 84%
TEMPEST LAB SERIES 3 – Accuracy – 84%
JANSZEN Z210A – Accuracy – 83%
PIONEER PROJECT 100B - Accuracy – 83%
FAIRFAX FX300 – Accuracy – 82%
KLH MODEL SIX V – Accuracy – 81%
ALTEC MODEL THREE – Accuracy – 80%
AUDIOANALYST A76X – Accuracy – 78%
ADVENT Utility Cabinet – Accuracy – 78%
RECTILINEAR MODEL X1b – Accuracy – 67%
For those that are interested, following are links to my two previous Consumer Reports Speaker Review Article posts:
Consumer Reports May 1970 Loudspeaker Tests and Rankings - http://www.audiokarma.org/forums/showthread.php?t=484524
Consumer Reports July 1973 Medium-Priced Loudspeakers Test and Rankings - http://www.audiokarma.org/forums/showthread.php?t=486249
And now on to the article.
“Medium-Priced Loudspeakers”
“It’s easy to spend $600 or more on a pair or loudspeakers for a high-fidelity stereo system. But before you start thinking about spending more than $200 for speakers, consider how much you would really get for the extra money. The best speakers tested for this report would give most listeners about as much fidelity as they could want – and for only about $100 to $130 per speaker.”
ACCURACY IS THE KEY
“Far more meaningful than power of deep bass as a standard for judging speaker performance is accuracy, or fidelity, of reproduction. The ability to change electrical input signals into sound that corresponds almost exactly to them is, after all, virtually a definition of the high-fidelity loudspeaker’s job. Moreover, accuracy is one of the few objective standards for rating performance; differences in individual taste make it hard to say just how a good speaker should sound otherwise.”
“Most of the speakers demonstrated impressively high accuracy. The top-rated Avid 102 earned a higher score than any speaker we’ve every reported on; 91. But the EPI 100, with an accuracy score of 90, was virtually indistinguishable from the Avid in accuracy. Indeed, the first 11 speakers in the Ratings are within eight percentage points of each other. CU has found that even trained listeners can’t readily tell which of 2 speakers is more accurate when the two are eight points or less apart. That’s not to say those 11 models sounded alike; even models with identical accuracy scores sounded different from one another. One significant reason: Departures from accuracy that did occur came at different points on the musical spectrum.”
A SPECIAL CASE
“The subjective judgments of CU’s listeners have almost always corroborated out laboratory tests for accuracy. But this time, listening failed to confirm the high accuracy score (89) that our instrument tests recorded for the Micro-Acoustics FRM2. That speaker just didn’t sound as good to the listeners as did others with similarly high scores. The test data revealed the reason: a sharp rise in the midrange, from 1000 to 2500Hz, when measured directly in front of the loudspeaker. But that alone didn’t explain the panel’s observations: A contributing factor was ‘directivity.’ Between 1000 and 2500 Hz, the Micro-Acoustics beamed a very narrow cone of sound energy – much narrower than that beamed by the others speakers over the same frequency range. As a result, listeners at a ‘normal’ distance of eight to ten feet would hear these midrange sounds primarily as beamed from the speaker; they would hear little of that sound reflected from room surfaces. Such directivity would only exaggerate the effects of the speaker’s midrange sounds. It was those peculiarities that the listening panel picked up.
We therefore felt it would be misleading to let Micro-Acoustics’ high objective score stand. A statistical analysis of listening-test data showed that reducing the original score by four percentage points, to 85 per cent, would result in a score in line with our overall judgment of this loudspeaker.
It should be noted that the effect of this speaker’s high directivity would be much less audible in a very large room. Listening could be pleasant if you can sit at least 16 feet from the speaker; then you’d hear more reflected (reverberant) sound. The Micro-Acoustics’ anomaly was virtually inaudible in CU’s listening room from 20 feet away. The effect can also be reduced by angling the speaker toward a side wall.”
RECOMMENDATIONS
”Listeners looking for a fine loudspeaker at a moderate price should be quite content with any one of the 11 units with accuracy scores between 83 and 91, so long as the speaker’s power needs are suitable to the receiver to be used and to the listening room. All offered comparably high accuracy – albeit different sounds, as we’ve explained. Overall quality was a shade higher with models that finished high in the top 11: the Avid 102 ($130), the EPI 100 ($100), and the B.I.C. Venturi Formula 2 ($120). (Among those three, bass capability was superior with the Avid.)
Another fine speaker was the Marantz Imperial 5G, at $100. We check-tested its brandmate, the Marantz Imperial 5, which lists for $80. Though the cheaper model has a plainer finish and grill than the Imperial 5G, its high-accuracy performance was the same.”
“It’s best if you can audition speakers in the room where you plan to install them (they won’t sound quite the same anywhere else). So look for audio dealers willing to lend out speakers for a trial period – they do exist.
Chances are, though, you’ll have to listen in a dealer’s showroom. With luck it will have listening facilities acoustically shielded from outside distraction. And with luck it will have a way to switch almost instantly from one model to another; direct comparison between speakers is invaluable. But don’t compare more than two models at a time; stick with the preferred model and go on to the next.”
“Whether you can audition or not – you may not have the option – insist on return privileges. They’re your only salvation if you’re disappointed in the way a speaker sounds when you get it home.”
RATINGS
MEDIUM-PRICED LOUDSPEAKERS
“Listed in order of ability to reproduce sound accurately; models scored equal in accuracy are listed in order of increasing price. Differences of about 8 percentage points or less in accuracy are not readily resolved by ear (see story). Except as noted, all have a walnut-grain vinyl finish and balance control(s), if any, at the rear. Dimensions are in order of height, width, and depth. Prices are list, rounded to the nearest dollar; discounts are generally available. All were judged Acceptable.”
AVID 102 – Accuracy – 91%
EPI 100 – Accuracy – 90% - A Best Buy
B.I.C. VENTURI FORMULA 2 – Accuracy – 88%
MARANTZ IMPERIAL 5G – Accuracy – 87% - A Best Buy
LAFAYETTE CRITERION 2001 – Accuracy – 85% - A Best Buy
MICRO-ACOUSTICS FRM2 – Accuracy – 85%
REALISTIC OPTIMUS 5B – Accuracy – 84%
DYNACO A35 – Accuracy – 84%
TEMPEST LAB SERIES 3 – Accuracy – 84%
JANSZEN Z210A – Accuracy – 83%
PIONEER PROJECT 100B - Accuracy – 83%
FAIRFAX FX300 – Accuracy – 82%
KLH MODEL SIX V – Accuracy – 81%
ALTEC MODEL THREE – Accuracy – 80%
AUDIOANALYST A76X – Accuracy – 78%
ADVENT Utility Cabinet – Accuracy – 78%
RECTILINEAR MODEL X1b – Accuracy – 67%
For those that are interested, following are links to my two previous Consumer Reports Speaker Review Article posts:
Consumer Reports May 1970 Loudspeaker Tests and Rankings - http://www.audiokarma.org/forums/showthread.php?t=484524
Consumer Reports July 1973 Medium-Priced Loudspeakers Test and Rankings - http://www.audiokarma.org/forums/showthread.php?t=486249