Koss Totem Mani-2 Manuel d'utilisateur télécharger pdf (Page 8)

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highlighting their tremendous imaging,

dynamics and musicality.

Tom Norton, of Stereophile and

Ultimate AV fame, had a totally different

opinion of the RC-70 than your team.

In his review Mr. Norton is quoted as

saying, “the RC-70 had superb overall

tonal balance” and that the “top end of

the RC-70 is as open, airy and as detailed

as you could wish for.” Mr. Norton’s

comments regarding soundstage repro-

duction and midrange accuracy are also

different from what you found. He said,

“the RC-70’s sounded neither ‘in your

face’ forward nor recessed, and produced

a detailed, well-focused soundstage…

Voices were…beautifully served by

the RC-70, with soaring female voices

and male vocals that were rich and full

bodied.”

We are not sure if your opinions

were biased due to your experience and

appreciation of the old Reference Con-

noisseur model, or if you were looking

for something else from these speakers.

Your comparison of the original Refer-

ence Connoisseur to today's RC-70 is

like comparing a 20-year-old muscle car

with today's muscle car. They are very

different in every sense, and making

a direct comparison is like comparing

apples and oranges. While both may

be good or excellent cars, they do things

very differently, and this must be taken

into consideration.

Today’s Reference Connoisseur

product had more challenging standards

to meet. Twenty years ago it was only

about the sound. Efﬁciency, dynamics,

low distortion and power handling were

less of a concern. Today, our speakers are

used in a number of different conﬁgura-

tions, from state of the art two channel

systems to high-powered multichannel

systems. The Reference Connoisseur

Series must have the efﬁciency to be

driven with modest-powered ampliﬁers,

plus must have the dynamic range and

power handling to handle the demands

of movie soundtracks. A three-year

development program was necessary to

redesign every component in order to

meet these standards. The new tweeter,

midrange and woofers for the Reference

Connoisseur Series are ground-breaking

in their ability to perform to the high-

est musical standards, while providing

ultra low distortion with high power

handling.

All of us here feel the new RC-70

surpasses the performance parameters

that were established by the original

Reference Connoisseur. The RC-70 still

has the captivating, immersive sound of

the original, but has improvements in

almost every area.

In your review you mention that the

frequency response curve “is amazingly

ﬂat, one of the best we have ever mea-

sured.” Then you suggest that comes at

a cost: phase accuracy. Flat frequency

response of the speaker system is made

up of both magnitude and phase rela-

tionships of the individual drivers.

Since you mention the RC-70 has ﬂat

frequency response, it would suggest

that the phase relationship between the

individual drivers is also correct.

Also, another point is the place-

ment of the microphone in trying to

recreate the square wave that you were

measuring. In a two-way speaker, the

microphone distance can be at a shorter

distance and still deliver a somewhat

meaningful measurement. With a multi-

source speaker system like the RC-70,

a small microphone distance from the

speaker would result in a meaningless

test, with measurements that do not

reﬂect what the speaker is truly recreat-

ing. The only way to perform accurate

acoustical measurements, especially with

multi-driver speakers, is a microphone

distance of at least 2 metres. As you

probably know, such a microphone

distance requires the use of an anechoic

chamber, which negates the inﬂuence of

room boundaries when the microphone

is placed at greater distances from the

speaker.

We are still not certain why you

were not able to get good results from

the RC-70, even though the response

curve suggests the speaker should be

excellent. Maybe the room you placed

the speaker in was too small for such a

full range speaker system? We do know

that the RC-70 is deﬁnitely suited to

larger rooms than the previous Refer-

ence Connoisseur model, as it has more

extended response and output.

As you can tell, we are very disap-

pointed by the tone of your review

and by some of the comments, which

we feel, are unfounded. We think the

Energy brand and its loyal customer base

deserved better.

Scott Goodman

Energy Speakers Brand Manager

SCARBOROUGH, ON

Kudos and, better, bravo for a singu-

lar and superlative publication. I quite

eagerly digested my very ﬁrst issue ever

of UHF about a week ago. I am still in a

very pleasant state of shock!

Having quite regularly sampled both

The Absolute Sound and Stereophile for

about four decades, my mind set was

entirely unprepared for UHF’s unique

raison d’être. Your guiding ethos, ethics

and modus operandi are so simple in

their fundamental elegance. To allude

to Carly Simon’s lyrics celebrating the

now mythic procreative capacity of 007

is simply incorrect. Not only “Nobody

Does it Better” — double negative

intended — but no other publication does

it!

Bob Reinach

POULSBO, WA

Just noticed a spelling mistake on the

cover of UHF No. 75… “redicovery.”

Since most of your subscribers are prob-

ably a little more educated than most,

I expect you’ll probably be getting a

deluge of e-mails.

Still love the magazine though.

Jeff Malloch

ELORA, ON

Somehow one never thinks of running

spellcheck on a cover. Too obvious, right?

I read the comment about the “open

source” turntable in UHF No. 74. Your

writer said that this was not the way hi-ﬁ

equipment is designed.

Yet one of the top billed turntables

around, the Teres , was designed just this

way. Interested people got together on

a newsgroup and deliberated, and this

led to a small run of parts and then a

commercial endeavor, and some pretty

over-the-top variations, not to mention

the Redpoint brand. You can check out

the process here: http://www.teresaudio.

com/project/index.html.

Dominic

MONTRÉAL, QC

Interactive features

This free issue works just like the full (paid) electronic version of the magazine.

Click on a heading in the table of contents, and you'll be whisked right to the

article itself. Same thing with the names of advertisers on page 79. And if you

click on most ads in this issue, if you're connected to the Internet you’ll ﬁnd

yourself on the company’s Web site.

6 ULTRA HIGH FIDELITY Magazine

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Koss Totem Mani-2 Manuel d'utilisateur Page 8

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