Q. Is asymmetry in monitors a problem?

Published in SOS February 2012
Bookmark and Share

Sound Advice : Mixing

I'm considering AVI's Pro Nine Plus system for my main nearfield monitoring, partly based on the great review they got from Paul White back in September 2005 (/sos/sep05/articles/avipronine.htm). Should I be worried about the fact that the tweeter mounting and porting are both asymmetrical in relation to the main driver? Will this cause slight delay/phasing issues when placed in the classic equilateral-triangle stereo setup?

AVI's Pro Nine Plus monitors (left) have their tweeter mounting and porting asymmetrical to the main driver. This is actually relatively common, as you can see from the Acoustic Energy AE22s and the Dynaudio BM15As (below).AVI's Pro Nine Plus monitors (left) have their tweeter mounting and porting asymmetrical to the main driver. This is actually relatively common, as you can see from the Acoustic Energy AE22s and the Dynaudio BM15As (below).Q. Is asymmetry in monitors a problem?Q. Is asymmetry in monitors a problem?

Via SOS web site

SOS contributor Mike Senior replies: Opinions differ about a lot of aspects of speaker design, as you can easily see even just from comparing the external appearance of a selection of similarly priced monitors. One such moot point is how important symmetrical driver placement is, and the Pro Nines are by no means the only speakers that have their tweeters skewed to one side like this. The Acoutic Energy AE22s and Dynaudio BM15As both feature this kind of setup, and are both nonetheless well-regarded. Although I've not tried these specific speakers myself, the main thing I'd be wary of in principle is that the size of the stereo sweet spot may be reduced. No matter which way you move your head (forward/back, side to side, or up/down) the potential for inter-driver phasing in the mid-range appears to me to be greater than with a more traditional vertically stacked driver configuration. Even if this theoretical concern is borne out in practice, though, the real question is how much it'll matter to you. If you're happy to stay in the sweet spot most of the time, and can check the mid-range balance with a single-driver speaker such as an Auratone (or similar), then it may not be a huge practical concern. Personally, I'd say that if you like the speakers otherwise, don't let the asymmetry be a deal-breaker.

As for the ports, again I don't think their asymmetry should really put you off, and although I find that porting in budget-level monitors can cause all sorts of low-end monitoring problems, I would imagine that these speakers are probably getting into the kind of price range where the potential problematic side-effects of the porting are kept well enough under control that you can work with them for mixing purposes. Certainly, the 90Hz low-end boundary on the published frequency-response figure leads me to suspect that the port hasn't been overhyped, as it seems to be on many budget models, and that counts for a lot in terms of accuracy.  .


October 2014
On sale now at main newsagents and bookstores (or buy direct from the
SOS Web Shop)
SOS current Print Magazine: click here for FULL Contents list
Click image for October 2014
WIN Great Prizes in SOS Competitions!

 

Home | Search | News | Current Issue | Tablet Mag | Articles | Forum | Subscribe | Shop | Readers Ads

Advertise | Information | Privacy Policy | Support | Login Help

 

Email: Contact SOS

Telephone: +44 (0)1954 789888

Fax: +44 (0)1954 789895

Registered Office: Media House, Trafalgar Way, Bar Hill, Cambridge, CB23 8SQ, United Kingdom.

Sound On Sound Ltd is registered in England and Wales.

Company number: 3015516 VAT number: GB 638 5307 26

         

All contents copyright © SOS Publications Group and/or its licensors, 1985-2014. All rights reserved.
The contents of this article are subject to worldwide copyright protection and reproduction in whole or part, whether mechanical or electronic, is expressly forbidden without the prior written consent of the Publishers. Great care has been taken to ensure accuracy in the preparation of this article but neither Sound On Sound Limited nor the publishers can be held responsible for its contents. The views expressed are those of the contributors and not necessarily those of the publishers.

Web site designed & maintained by PB Associates | SOS | Relative Media