A change of Surround Speakers


My original side surround speakers were an excellent PSB 10S Bipoles. But due to a structural issue, I originally had them mounted high up on a shelf, about 2.2m above the floor and about 4 feet above my listening position. This resulted in an uneven sound experience and the Audyssey compensated by turning up my left surround much louder than my right. Furthermore, i could not get the enveloping effect I was used to with my old setup, as the speakers were near the ceiling, and a little recessed on the Ikea shelf. Now you may think that it was no big deal, but it resulted in a rather unsatisfactory ambience and it was hard to feel the surround experience I had created before.

So I decided on a few options:
a - bring them down and drill a hole into them and mounted them underneath the old shelf in an underslung fashion. 
b- I also researched into the Monitor Audio options, since I was already using them for the front speakers. This seemed to be the better option for a few reasons.

One the drivers of the new RX series were more similar to my older GS series, allowing for a more seamless integration. The RX FX speakers also had a switch which allowed them to be either bipole or dipole. 
There was a pair of mounting lugs behind, which allowed the speakers to be mounted almost flush with the side walls without a shelf or a bracket. And this suited my narrow long room better. There is a whole debate on the dipole / bipole issue, and here is a link to a good article on the matter: (http://forum.blu-ray.com/showthread.php?t=170720).

Of note is that you use the Dipole mode in a way such that you sit in the null zone between the two tweeters, to give a very diffuse sound and I found this to be more ideal since my sitting position was almost exactly between the two side surrounds.

Some specs and info on the MA RXFX:

It's widely understood that the sound of surround TVs cannot compete with the excitement of a properly designed and equalised home theatre system. But great sound comes at the expense of living space…until now. The wall-hugging RX-FX surround speaker reconciles the problem by providing a convincing, enveloping timbre-consistent surround sound that places you on the edge of your seat and at the heart of the action. Discreet enough to be flush-mounted on side or rear walls, the RX-FX design will blend with the system and your d├ęcor so completely you'll wonder why you ever thought of compromise. It's also immensely flexible sonically, offering direct or diffuse sound effects at the flick of a switch.

  • Flush to wall placement, with recessed termination.
  • Drivers match with other Rx loudspeakers for consistent timbre and consistency.
  • Dual di-pole/ bi-pole modes easily selected by switch operation.
  • New C-CAM® tweeter design with damped rear chamber, providing improved clarity and wider operating range to make better use of HD audio formats
  • Single 6" C-CAM® bass/mid-range driver incorporating RST® technology, for better damping and improved mid-range clarity.
  • Selected premium quality wood veneers or high gloss piano finishes.
  • Acoustically matched with all other Rx speakers for excellent imaging and consistency of timbre in surround applications.


Specification

ItemValue
System Format: 2 Way
Frequency Response: 60Hz - 35kHz
Sensitivity (1W@1M): 89dB
Nominal Impedance: 6 Ohms
Maximum SPL (dBA): 111.8
Power Handling (RMS): 80W
Recommended Amplifier Requirements (RMS): 10-80W
Bass Alignment: Sealed Cabinet
Tweeter Crossover Frequency: 2.1kHz
Drive Unit Complement: 1 x 6" RST® Bass/Mid driver.
2 x 1" (25mm) C-CAM® gold dome tweeters
Product External Dimensions:
(H x W x D)
 250 x 300 x 120 mm
(9 13/16 x 11 13/16 x 4 3/4 inch)
Individual Weight: 4.69 Kg (10.38 lb)


I found that the experience with these speakers in the dipole mode, sited about 75 cm above my listening position was pretty good and I then swopped the PSB bipoles to the rear back position. This was also an improvement as the rear backs were in a less than ideal or Dolby dictated position and still allowed for a good spread of the sound in the rear soundstage. 


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