Rockport Technologies Avior II loudspeaker Associated Equipment

Sidebar 2: Associated Equipment

Analog Source: Linn Sondek LP12 turntable with Lingo power supply, Linn Ekos tonearm, Linn Arkiv B cartridge.
Digital Sources: Aurender N10 music server; Ayre Acoustics C-5xeMP universal player; Arcam irDAC-II, Ayre Acoustics QX-5 Twenty, Chord DAVE, PS Audio PerfectWave DirectStream D/A converters; AudioQuest JitterBug, UpTone Audio ReGen USB cleaner-uppers; Mac mini running Vinyl Studio, Pure Music 3, Audirvana 1.5, Roon 1.3; Ayre Acoustics QA-9 USB A/D converter.
Phono Preamplifier: Channel D Seta L.
Preamplifier: Ayre Acoustics KX-5 Twenty.
Power Amplifiers: MBL Corona C15, Pass Labs XA60.5 (both monoblocks).
Cables: Digital: AudioQuest Coffee (USB), Canare (AES/EBU). Interconnect (balanced): Transparent Reference. Speaker: Transparent Reference, Kubala-Sosna Elation!. AC: Kubala-Sosna Elation!, manufacturers' own.
Accessories: Target TT-5 equipment racks; Ayre Acoustics Myrtle Blocks; ASC Tube Traps, RPG Abffusor panels; Shunyata Research Dark Field cable elevators; Audio Power Industries 116 Mk.II & PE-1 AC line conditioners (hard drive, computers). AC power comes from two dedicated 20A circuits, each just 6' from breaker box.—John Atkinson

COMPANY INFO
Rockport Technologies
586 Spruce Head Road
South Thomaston, ME 04858
(207) 596-7151
ARTICLE CONTENTS

COMMENTS
kanew's picture

I was always under the impression that the specified frequency response of a loudspeaker is under anechoic conditions. Here the specified -3db point is 25Hz but the anechoic mesurements shows -10 dB at 25Hz w.r.t. 100Hz. Apparently the manufacturer has considered 7dB of room gain.

To the reviewers, is there any industry standard of room gain amount to be added to the measured anechoic (/quasi-) measurements of a speaker, Or any standard room size based on which they draw their -3dB response?

Secondly, regarding the rising low frequency in your anechoic measurements due to stated artifact of nearfield measurement techniques, what would be the order of the error that your readers may safely assume?

Dan Moroboshi's picture

Hello JA, it was mentioned that some colloration could be noticed on some piano recording that was reproduced in a real listening room. I was quite anxious to see in the measurements plot the reasons for that, but only a suspect of the ressonance in the side pannels was commented to be a possible cause. However, in the frequency response in the JA room (figure 6), I could notice some peaks and valleys between 500-800Hz and on 2.5-3.0KHz. Could they be indications for these collorations?

Alberello's picture

Unfortunately you can't measure coloration, than regarding the room response curve you are looking, is normal to see this peaks and valley in every room and can't be considered as an instrument to evaluate a loudspeaker because the changes from one room to another are huge.

Jason P Jackson's picture

Andy has the crossover point between the midrange and woofer fairly low. A higher crossover point at around 250hz to 350hz to would somewhat side-step the floor bounce cancellation in the lower-midrange we see in the measurements.
In fact, this design is no different from a pair of standmount speakers with a pair of passive subs underneath. And how much does it cost again?

ArmyStrong's picture

In your humble and professional opinion, which of the following full range loudspeakers would you say are the best in this price range:
1) Rockport Technologies Avior II
2) Magico S5 Mk.II
3) Wilson Sasha DAW
4) EgglestonWorks Viginti

X