La prueba se realizó en igualdad de condiciones, stands, cables de parlante e interconexión standard de alta calidad, amplificación adecuada (Krell S550i), fuente (Mac mini) y DAC (Pro-ject RS). Se igualaron niveles con ruido rosa grabado a un nivel de -10 dbFS, con un nivel de 85dbSPL a 1m de distancia de cada caja, medido ésto con sonómetro con ponderación A. El material de escucha constó de varios temas de diversos géneros extraídos de CDs originales en un sólo track sin tocar el nivel original en ningún caso (Gracias GastónP!).
Cada participante pudo evaluar a su criterio los diferentes puntos y se calificó de 1 a 6.
Resultados Generales:

Los precios mencionados en los siguientes gráficos, así como en el detalle de cada modelo de cajas, corresponden a los recomendados por los fabricantes como precios de lista, en los casos de los modelos discontinuados, corresponden a ése mismo precio en el momento de su fabricación.
Gráfico de Precios, estética y puntajes:

Precios sólamente:

Puntaje + Estética vs Precios:

A continuación se adjuntan fotos reales y specs de los parlantes que participaron, en el orden en que fueron votados entre paréntesis.
(1) Dynaudio Confidence C1 Platinum
Specs
Sensitivity: 85 dB (2,83 V/1 m)
IEC Power Handling: 170 W
Impedance: 4 Ohms
Frequency Response: 45 Hz – 22 kHz (± 3 dB)
Box Principle: Bass Reflex Rear Ported
Crossover: 2 way
Crossover Frequency: 1800 Hz
Crossover Slope: 6 dB/Octave
Woofer: 17 cm MSP
Tweeter: 28 mm Esotar²
Weight: 10.9 kg / 24 lbs
Dimensions (W x H x D): 200 x 445 x 430 mm7.9 x 17.5 x 16.9"
Precio MSRP U$S 8500.-
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(2) Paradigm Signature S2 V2
Specs
2-driver, 2-way bookshelf / stand-mounted
Crossover 3rd-order electro-acoustic at 1.8 kHz
Frequency Response On-Axis ±2dB from 52 Hz - 45 kHz
Frequency Response 30° Off-Axis
±2dB from 52 Hz - 20 kHz
High Frequency Driver 25-mm (1 in) P-Be™ dome, ferro-fluid damped / cooled, rear damping chamber with ARB™ fins and integrated heatsink, dual super-neodymium ring magnets, die-cast heatsink chassis, IMS/SHOCK-MOUNT™
Mid/Bass Frequency Driver 178-mm (7 in) Co-PAL™ cone, overmolded NLC™ surround, 38-mm (1-1/2 in) split voice-coil, hard ferrite magnet, AVS™ die-cast heatsink chassis, IMS/SHOCK-MOUNT™
Low Frequency Extension 36 Hz (DIN)
Sensitivity Room / Anechoic 91 dB / 88 dB
Impedance Compatible with 8 ohms
Suitable Amplifier Power Range 15 - 225 watts
Maximum Input Power 140 watts
Weight 28 lbs. (12.7 kg)
Dimensions HxWxD 15" × 8.25" × 14" (38.1cm × 21.0cm × 35.6cm)
Precio MSRP U$S 2200.-
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(3) Sonus Faber Venere 1.5
Specs
2 way standmount bookshelf vented box
TWEETER 29 mm high definition precoated fabric dome driver with no ferrofluid. Sonus faber design.
MID-WOOFER 1x150 mm Free compression basket design and Curv cone. Ultra dynamic performance and linearity.Sonus faber design.
CROSSOVER POINT 2.000 Hz
FREQUENCY RESPONSE 50 Hz – 25.000 Hz
SENSITIVITY (2.831V/1M) 85 dB SP
NOMINAL IMPEDANCE 6 Ohm
SUGGESTED AMPLIFIER POWER OUTPUT 30W – 150W without clipping
LONG-TERM MAX INPUT VOLTAGE (IEC-268-5) 20V rms
DIMENSIONS (HxWxD) 394 x 206 x 300 mm
TOTAL DIMENSIONS (HxWxD) 1076 x 276 x 382 mm
WEIGHT (Kg) 6 each
Precio MSRP U$S 1200.-
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(4) Dali Helicon 300MKII
Specs
Frequency Range (+/-3 dB) [Hz] 37 - 27,000
Sensitivity (2,83 V/1 m) [dB] 86.0
Nominal Impedance [ohms] 4
Maximum SPL [dB] 108
Recommended Amplifier Power [W] 50 - 200
Crossover Frequency [Hz] 3,400 / 13,000
Hybrid tweeter module, Super high freq. driver, Quantity 1 x 10 x 55 mm
Hybrid tweeter module, Super high freq. driver, Diaphragm type Ribbon
Hybrid tweeter module, High frequency driver, Quantity 1 x 25 mm
Hybrid tweeter module, High frequency driver Diaphragm type Soft Textile Dome
Low frequency driver, Quantity 1 x 6½"
Low frequency driver, Diaphragm type Wood Fibre Cone
Enclosure type Bass Reflex
Bass Reflex Tuning Frequency [Hz] 34.5
Magnetic Shielding No
Recommended Distance From Wall [cm] > 25
Dimensions With Base (HxWxD) [mm] 440 x 210 x 420
Weight [kg] 10.5
Precio MSRP U$S 2900.-
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(5) Vienna Acoustics Haydn
Specs (se aclara que al haber varias series del mismo modelo, podrían las specs no ser 100% acertadas. Llegado el caso se modificarán)
Impedance: 6 Ohms
Frequency Response: 42-20,000 Hz
Sensitivity: 89 dB
Recommended Amplifiers Drive Units: 25-180 watts RMS
5 Bass/Midrange Driver
1 Dome-Tweeter
Dimension (W x H x D) inches: 6.7 x 13.6 x 10.2?
Precio MSRP U$S 1800.-
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(6) Paradigm Prestige 15B
Specs
2-driver, 2 way bookshelf / stand mounted
Crossover 2nd order electro-acoustic at 2.0kHz
Frequency Response On-Axis ±2dB from 57 Hz - 20 kHz
Frequency Response 30° Off-Axis ±2dB from 57 Hz - 17 kHz
High Frequency Driver 1" (25mm) X-PAL™ dome, ferro-fluid damped / cooled, Perforated Phase-Aligning (PPA™) Tweeter Lens, Finite Element Analysis (FEA) optimized pole piece assembly
Mid/Bass Frequency Driver 5.5" (140mm) X-PAL™ driver, overmolded Active Ridge Technology (ART™) surround, SHOCK-MOUNT™ Isolation Mounting System, 1.5" high-temp voice coil
Low Frequency Extension 42 Hz (DIN)
Sensitivity Room / Anechoic 90 dB / 87 dB
Impedance Compatible with 8 ohms
Suitable Amplifier Power Range 15 - 150 watts
Weight 16 lbs. (7.3 kg)
Dimensions HxWxD 12.375" × 7" × 10.875" (31.4cm × 17.8cm × 27.6cm)
Precio MSRP U$S 1600.-
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(7) Focal Aria 906
Specs
Two-way bass-reflex floorstanding loudspeaker
Speaker drivers 61/2" (16.5cm) Flax bass - midrange
1" (25mm) Al/Mg TNF inverted dome tweeter
Frequency response (+/- 3dB) 55Hz - 28kHz
Low frequency point - 6 dB 47Hz
Sensitivity (2.83V / 1m) 89.5dB
Nominal impedance 8 Ohms
Minimum impedance 4.6 Ohms
Recommended amplifier power 25 - 120W
Crossover frequency 2800Hz
Dimensions (H x W x D) 153/8x 87/8x 913/16" (390x225x250mm)
Weight 19lbs (8.5kg)
Precio MSRP U$S 1200.-
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(8) KEF R300
Specs
Three-way bass reflex
DRIVE UNITS Uni-Q driver array: HF: 25mm (1in.) vented aluminium dome /// MF: 125mm (5in.) aluminium
Bass units: LF: 165mm (6.5in.) aluminium
FREQUENCY RANGE 42Hz - 45kHz (-6dB)
FREQUENCY RESPONSE 50Hz - 28kHz (±3dB)
CROSSOVER FREQUENCIES 500Hz, 2.8kHz
MAXIMUM OUTPUT 110dB
AMPLIFIER REQUIREMENTS 25 - 120 W
SENSITIVITY 88dB (2.83V/1m)
HARMONIC DISTORTION <0.4% 130Hz-20kHz (90dB, 1m)
NOMINAL IMPEDANCE 8 Ohms (min.3.2 Ohms)
DIMENSIONS 385 x 210 x 345 mm (15.2 x 8.3 x 13.6 in.) with grille and terminal
WEIGHT 12kg (26.4lbs)
Precio MSRP U$S 1800.-
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(9) Revel Performa M106
Specs
2-Way Bookshelf Monitor Loudspeaker
CROSSOVER FREQUENCIES 2.3 kHz
ENCLOSURE TYPE Bass-reflex via Rear-firing Port
HIGH-FREQUENCY DRIVE COMPONENTS 1” (2.5 cm) Aluminum Tweeter with Acoustic Lens Waveguide
NOMINAL IMPEDANCE 8 Ohms
LOW FREQUENCY EXTENSION 10dB@39Hz -6dB@54Hz -3dB@59Hz
LOW-FREQUENCY DRIVE COMPONENTS 6.5” (16.5 cm) Aluminum Cone, Cast-frame Woofer
RECOMMENDED AMPLIFIER POWER 50-150
SENSITIVITY 87 dB
WEIGHT Net Weight: 19 lb (8 kg) Note: Optional Stand Adds 8 lb (4 kg)
DEPTH 11" (27.8 cm) WIDTH 8.3" (21 cm) HEIGHT 15" (38.1 cm) Note: Optional Stand Adds 25" (63.5 cm)
Precio MSRP U$S 2100.-
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(10) ELAC Unifi UB5
Specs
Speaker type: 3-way, bass reflex
Tweeter: 1 x 1-inch soft dome, concentrically mounted
Midrange: 1 x 4-inch aluminum cone
Woofer: 1 x 5.25-inch aluminum cone
Crossover frequency: 270 / 2,700 Hz
Frequency response: 46 to 25,000 Hz
Sensitivity: 85 dB at 2.83 v/1m
Recommended amplifier power: 40 to 140 wpc
Peak power handling: 140 wpc
Nominal impedance: 4 Ω; minimum 3.4 Ω
Binding posts: 5-way custom
Magnetic shielding: No
Height: 12.75 in / 324 mm Weight: 7.87 in / 200 mm Depth: 10.75 in / 273 mm
Precio MSRP U$S 500.-
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(11) KEF LS50
Specs
Two-way, reflex-loaded, stand-mounted loudspeaker.
Drive-units: Uni-Q driver array with 1" (25mm) vented aluminum-dome tweeter, 5.25" (130mm) magnesium/aluminum alloy-cone woofer. Crossover frequency: 2.2kHz.
Frequency range (–6dB): 47Hz–45kHz. Frequency response: 79Hz–28kHz, ±3dB.
Sensitivity: 85dB/2.83V/m.
Nominal impedance: 8 ohms. Minimum impedance: 3.2 ohms.
Harmonic distortion (second and third harmonics, 90dB, 1m): <0.4%, 175Hz–20kHz.
Amplifier requirements: 25–100W. Maximum output: 106dB.
Dimensions: 11.9" (302mm) H by 7.9" (200mm) W by 10.9" (278mm) D. Weight: 15.8 lbs (7.2kg).
Precio MSRP U$S 1500.-
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(12) Celestion SL6Si
Specs
Impedance: 8 Ohms
Amplifier Requirements: 25-120 Watts (continuous sinewave output)
Sensitivity: 1 watt at 1 metre produces 84 dB SPL
Power Rating: 120 Watts
Crossover: 2.8 kHz third order high pass, second order low pass
Low Frequency Performance: -3dB at 75Hz -6dB at 60Hz (free space)
Internal Volume: 12 litres / 0.4 cubic feet
Cabinet Dimensions: 376mm(14.75")H x 200mm(7.75")W x 268mm(10.5")D
Weight: 84kg(18.5lbs/ea)
Precio MSRP U$S 1300.-
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De acuerdo a lo conversado entre varios de los asistentes a la reunión, era importante saber qué pasaba con la relación precio/prestaciones de cada una de las cajas, punto que no estuvo en la propuesta de evaluación. Consideramos que éste es un dato no menor a la hora de poder evaluar un cambio o acceder a un primer juego de cajas.
Esperamos los aportes de quienes estuvieron en la prueba ya que enriquecerán el hilo y aportarán data a quienes busquen en un futuro un upgrade y tengan al menos alguna guía para poder consultar.