Speaker Asylum General speaker questions for audio and home theater.

Register / Login

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Speaker Asylum ]

---

[ Alert Moderator ]

---

RE: How's your Tesla doing? nt

Posted by seancuster71@gmail.com (P) on March 11, 2025 at 15:06:50

In Reply to: How's your Tesla doing? nt posted by Ozzie on March 10, 2025 at 18:26:36:

This message was in my email but did not post to the forum so here is a screen shot of the message from user Ozzie and my reply.

You can trust John Atkinson, I assure you of that and you can trust his measurements as long as you understand how these measurements are taken. So can in room measurements cause a 9dB spike in bass response yes and no. So, let's say you have a 25' by 30' room, and you place your speaker in the middle of the room will it cause a spike in bass no but move that speaker closer to a wall and you could start to measure an increase in bass. Now start to move that speaker toward the corner of the room and yes, the bass response will increase considerably and could increases by 9dB if shoved all the way into the conner.

So, give John some credit and do not assume a man that has measured the response of speakers for decades is clueless to room response that is absurd. John is measuring in the middle of a very large room away from walls and corners. I could only imagine the outcry from speaker designers and manufactures if he was measuring speakers in a way that made the speakers or company look bad. If he was doing this all designers and manufactures would have spoken out and we all would have read about it. Fact is all speakers have flaws there is no such thing as a perfect speaker if there was a perfect speaker we would all know about it.

And you cannot use anechoic chambers for bass response a 20 HZ wave is 56 feet and no anechoic chamber for speaker measurements is that large. There are very few anechoic chambers that are that large and those that are that large are owned by some of the largest companies and governmental research facilities in the world and are not used for speaker measurements. They are used for things like (antenna pattern measurements). For speaker measurements smaller anechoic chambers are used then the speaker is taken outside, and the bass frequencies are measured outside then the two responses are combined sounds crazy but it's true.

However, there is a way to accurately measure speakers. Back in 1997 Wolfgang Kippel founded Kippel Gmbh and in March of 2021 they released the Kippel nearfield scanner $100,000 dollar device has been a game changer for the way speakers are measured. The Kippel NFS/near field scanner does not need an anechoic chamber. But at a $100,000 price tag no speaker designers are using it that I am aware of. However, there are driver manufacturers that use the Kippel NFS to measure individual drivers.

When you see measurements in Stereophile that are not flat do not blame the measurer blame the designer/manufacturer. Many manufacturers boost bass and treble even in the high-end speaker industry. facts are many very expensive speakers do not measure flat. Zu audio is great example Zu speakers' measurements are horrible for all Zu audio speakers no matter who measures them, yet Zu audio have been selling speakers for 25 years.

There is a good interview on YouTube of john Atkinson interviewing Sean Casey founder of Zu audio and he confronts Sean Casey with the facts Zu speakers measure horrible and Sean Casey does not tell John Atkinson his measurements are wrong because they are 100% correct.

When you make false claims against very knowledgeable people such as john Atkinson you may want to think it out before you type it and post it online. John has been measuring speakers for decades if his measurements were flawed in any way do you think manufacturers would still send him speakers to measure and review knowing his measurements are going to be wrong and make their speaker look bad or undesirable the answer is no, they would not send their speakers to him.

Facts are John Atkinson has been measuring speakers for decades and he has measured over 700 speakers and not one speaker designer or manufacture I repeat not even one designer or manufacture have ever accused his measurements of being blatantly exaggerated due to his lack of knowledge on the subject of measuring speakers. That in itself tells the truth.

This post is made possible by the generous support of people like you and our sponsors:

VH Audio

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---