Pioneer S1-EX response above 10Khz | Stereophile.com

You are here

Log in or register to post comments

August 13, 2007 - 1:14am

#1

mf22433

mf22433's picture

Offline

Last seen: Never ago

Joined: Aug 13 2007 - 12:14am

Pioneer S1-EX response above 10Khz

Good day,

As a Stereophile subscriber, I read your review of the Pioneer S1-EX in the March issue. I also recently read several other glowing reviews of these loudspeakers. All the reviews I could access are unanimously positive.

The S1-EX is on my short list and I plan to listen to them soon.

I am however a bit worried about the response above 10Khz in the measurements you published. On Fig 4 (http://www.stereophile.com/floorloudspeakers/307piosex/index4.html) there are very serious dips and peaks (-10dB to +10dB).

Any explanations about these large dips and peaks and their potential impact?

Thanks in advance,
Best Regards,
Michel

August 13, 2007 - 4:02pm

#2

Elk

Elk's picture

Offline

Last seen: 7 months 3 weeks ago

Joined: Dec 26 2006 - 6:32am

Re: Pioneer S1-EX response above 10Khz

From the reviews, and Mr. Atkinson's comments, it appears that the tweeter's lateral dispersion ameliorates any possible problem.

It will be fun to learn what more people think when they get a chance to hear them.

August 14, 2007 - 11:41am

#3

Editor

Editor's picture

Offline

Last seen: 10 years 5 months ago

Joined: Sep 1 2005 - 8:56am

Re: Pioneer S1-EX response above 10Khz

Quote:
I am however a bit worried about the response above 10Khz in the measurements you published. On Fig 4 (http://www.stereophile.com/floorloudspeakers/307piosex/index4.html) there are very serious dips and peaks (-10dB to +10dB).

These are interference effects resulting from the coaxial arrangement of the tweeter and midrange unit. Basically, the output of the tweeter is reflecting from the boundary between the edge of the midrange cone and the surrounding baffle and because this distance is identical in all directions, the interference is maximized. However, both the position of the peaks and dips and their amplitude are very much dependent on the exact listening axis and the frequency region where all this is happening is higher than with some other designs using a coaxial tweeter/midrange unit. Both factors will tend to work against there being an audible problem.

John Atkinson
Editor, Stereophile

August 14, 2007 - 1:32pm

#4

mf22433

mf22433's picture

Offline

Last seen: Never ago

Joined: Aug 13 2007 - 12:14am

Re: Pioneer S1-EX response above 10Khz

John,

thanks a lot for the clarification.

Regards,
Michel