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These
speakers are gorgeous! Their design may not be everyone's cup of tea,
but the
finish is outstanding, the real wood veneers state very clearly that
this is not
a typical cheap MDF box. They also play very well, painting an
outstanding
soundstage (a fair dose of toe-in will prove very effective). They are
a bit
open in the higher spectrum, so it's better to pair them with neutral /
soft
sounding gear (NAD amps are usually fine, tubes
make it even better!). Bass performance is somewhat disappointing when
you first
hear them, as typical bookshelf speakers have a slightly enforced
mid-bass to
mask the lack of deep bass; not here, there is no bump in mid-bass, the
frequency response is flat down to about 65 Hz, then starts falling
quickly, the
result is a quick and well-defined bass performance that can be easily
augmented
in the lower octaves with a properly tuned subwoofer.
These
speakers in stock condition perform so well you may be tempted to keep
them as
they are. But you'd miss the last 10% of performance that can easily be
achieved, so if you want it all, here's some suggestions:
1) remove the
woofer from the case, and solder the silver cable straight into the
speaker terminals, avoiding those horrible fast-ons connectors. Be
quick, or you will damage the cones! Now you can dampen the plastic
basket of the woofer using small strips of damping compound. |
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2) now place
some large strips on damping compound on the inside of the case: this
tweak will further reduce the resonance of the Thai drums, as you can
easily discover knocking on them. Will this one close the performance
gap with Synthetic Marble speakers? Probably not, but we're getting
closer! |
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3) choose some
heavy, sturdy speaker stands (TNT-Audio's
Akropolis are just perfect, if you can stand their style...) and
tightly bind the speaker case to the top plate using adhesive hooks
(you can find them in most DIY shops, choose an arrow-pointed model so
that it can be firmly stuck into the plastic feet of the speakers).
There's a side benefit to this tweak: speakers won't fall down to the
floor as easily as before when someone accidentally hurts them
(actually that's the reason I started thinking about this!). But the
audiophile benefits are clear: by choosing arrow-headed hooks that can
firmly keep the speaker in place without any vibration, the case is
bound to a much heavier mass, the speaker stand, that greatly reduces
resonances. When playing loud, the nOrhs won't get mudded on bass
lines, and the soundstage will become firmer. And, I almost forgot,
never listen with the grill clothes on! |


|
Vifa TC14 |
Vifa MG14 |
Vifa PL14 |
Nominal impedance [ohm] 8
Voice coil resistance [ohm]
5.55
Nominal power [W] 35
Short term max power [W]
110
Long term max power [W] 110
Operating power [W] 10
Sensitivity [dB] 86
Frequency range [Hz]
55-4000
Free air resonance [Hz] 53
Voice coil diameter [mm] 25
Voice coil height [mm] 10
Air gap height [mm] 4
Voice coil inductance [mH]
0.60
Eff. diaphragm Area
[cm²] 80
Moving mass [g] 7.8
Magnet weight [g]/[oz]
240/8.5
Force factor [Bl] 5.2
VAS [l] 10.5
Qms 2.73
Qes 0.53
Qts 0.45
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Nominal impedance [ohm] 8
Voice coil resistance [ohm]
5.6
Nominal power [W] -
Short term max power [W] -
Long term max power [W] -
Operating power [W] -
Sensitivity [dB] 87
Frequency range [Hz]
40-5000
Free air resonance [Hz] 45
Voice coil diameter [mm] 25
Voice coil height [mm] 12
Air gap height [mm] 5
Voice coil inductance [mH]
0.72
Eff. diaphragm Area
[cm²] 80
Moving mass [g] 8.5
Magnet weight [g]/[oz] -
Force factor [Bl] 6.2
VAS [l] 13.8
Qms 1.99
Qes 0.35
Qts 0.30
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Nominal impedance [ohm] 8
Voice coil resistance [ohm] 5.8
Nominal power [W] 50
Short term max power [W] 250
Long term max power [W] 200
Operating power [W] 10
Sensitivity [dB] 86
Frequency range [Hz] 45-5000
Free air resonance [Hz] 47
Voice coil diameter [mm] 32
Voice coil height [mm] 10
Air gap height [mm] 4
Voice coil inductance [mH] 0.49
Eff. diaphragm Area [cm²] 80
Moving mass [g] 8.2
Magnet weight [g]/[oz] 415/14.5
Force factor [Bl] 5.5
VAS [l] 13
Qms 2.20
Qes 0.46
Qts 0.38
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