Enclosure Volume for Eton 11-581/50 Hex ?

[guru]

Hi !

I have looked at Avalon eidlon with the 11" but i get some very strange values when using the same size of the box (75 l) and the same Vents tuned to 19Hz as they do...

Are they using a diffrent model of 11" or what ? Can you suggest a volume for my 11" ?

Nominal rated power 150 W
Nominal impedance 8
Frequency range 25-1000 Hz
Sensivity 1W/1m 91 dB
Resonance freq. TSP 21 Hz
Qms 6,68
Qes 0,31
Qts 0,30
Vas 153 l
DC resistance 5,2
LInear excursion 5 mm
BL product 12,4 Tm
Moving mass incl. air 67,3 g
Effective piston area 366 cm²
Dome material HEXACONE
Voice coil inductivity 1,18 mH
voice coil Ø 50 mm
Former material Kapton
Air gap heigt 8 mm
Magnet Ø 134 mm


/Magnus

[SineEra]

I have looked at an avalon eidolon clone after reading Martin Colloms HiFi News review of them, In which he states " A low Q sealed box alignment is used, the reflex vent deliberately detuned to extend the extreme bass and more helpfully augment the systems low frequency dynamic range."

http://www.avalonacoustics.com/pdfs/eidolon_revu.pdf

In using WinISD with the Eton TS parameters for a 75L enclosure around 19HZ does seems a good trade off for phase and group delay characteristics. This seems so over a range of Q.

The measured -3dB point is around 36Hz which is in line with the calcs.

For this size this seems a reasonable choice to me.

What are your particular queries?