2021/06/02

Precision Devices PD.2155-1N



新型バスケットと5.5インチ径のinside/outsideボイスコイルを採用。
重量はわずか12.5kg。
この1Nシリーズは、PD.185N02のUK ‘NEXT GENERATION’ LINEを継ぐシリーズだと思う。
控えめなスペックに凄みを感じる。




GENERAL SPECIFICATIONS
Nominal Diameter 21” / 530 mm
Voice Coil Diameter 5.5” / 138.7 mm
Available Impedances 8 Ohm
Power Rating 1 2 * 1500 W (A.E.S.)
Peak Power (6dB Crest Factor)* 6000 W (A.E.S.)
Sensitivity (1W – 1m)* 98 dB
Frequency Range 30 Hz - 300 Hz
Recommended Enclosure Volume 150 - 200 Litres
Resonance 33 Hz
Voice Coil Winding Depth 26.00 mm / 1.02”
Magnet Gap Depth 13.0 mm / 0.51”
Flux Density 1.45 Tesla
Magnet Material Neodymium
Magnet Weight
Voice Coil Material Copper
Former Material Glass Fibre
Dust Dome Material Solid Paper
Suspension Material Fabric
Cone Material Paper
Surround Material Fabric

SHIPPING INFORMATION
Nett Weight 12.50 kg / 27.56 lb
Shipping Weight 14.5 kg / 29.56 lb

THIELE SMALL PARAMETERS
Fs 33 Hz
Re 5.1 Ω
Qms 9.8
Qes 0.374
Qts 0.36
Le (@1 kHz) -
Le (@10 kHz) 2.4 mH
Vas 241 Litres
Mms 320 g
Sd 1520 cm2
Cms 73.4 μm/N
BL 30 T/m
Xmax 11.00 mm
Vd 1.67 Litres
Ref. Efficiency 2.2%
EBP 88.24 Hz

DIMENSIONS & MOUNTING
Overall Diameter 21” / 530 mm
Widths Across Flats 532 mm
Flange Height 14 mm
Depth (Excl. Flange) 214 mm
Magnet Diameter 184 mm
Chassis Shoulder Diameter 492 mm
Outer Bolt Circle x6 M6 on 528 mm PCD
Inner Bolt Circle




2021/05/22

Precision Devices PD.24603BR



PDN.2450はバスケットがフェライトの初期型と同じものだったので、いずれ新型になるのではないかと思っていた。
ようやくPD.24603BRとして登場した。




なお、"PRELIMINARY SPECIFICATIONS"との記載があるのでデータは変更される可能性がある。

GENERAL SPECIFICATIONS
Nominal Diameter 24” / 610 mm
Voice Coil Diameter 6.08” / 152 mm
Available Impedances 8 Ohm
Power Rating 1 2 * 1800 W (A.E.S.)
Peak Power (6dB Crest 
Factor)* 7200 W (A.E.S.)
Sensitivity (1W - 1m)* 98 dB
Frequency Range 20 Hz - 200 Hz
Recommended Enclosure 
Volume 150 - 220 Litres
Resonance 34 Hz
Voice Coil Winding Depth 37.00 mm / 1.46”
Magnet Gap Depth 15.0 mm / 0.59”
Flux Density 1.5 Tesla
Magnet Material Neodymium
Voice Coil Material Copper
Former Material Glass Fibre
Dust Dome Material Solid Paper
Suspension Material Fabric
Cone Material Paper
Surround Material Fabric

DIMENSIONS & MOUNTING INFORMATION
Overall Diameter 632 mm
Width Across Flats 610 mm
Flange Height 17 mm
Depth (Excluding Flange) 260 mm
Magnet Diameter 194 mm
Chassis Shoulder Diameter 573 mm
Outer Bolt Circle x6 M8 on 606 mm PCD

WEIGHT
Nett Weight 23.00 kg / 50.71 lb
Shipping Weight 25.00 kg / 55.12 lb

THIELE SMALL PARAMETERS (8Ω MODEL)
Fs 34 Hz
Re 5.3 Ω
Qms 9.92
Qes 0.32
Qts 0.31
Le (@ 1 kHz) 4.01 mH
Le (@ 10 kHz) 1.51 mH
Vas 355 Litres
Mms 440 g
Sd 2239 cm2
Cms 49.8 µm/N
BL 39.46 T/m
Xmax 16.00 mm
Vd 3.58 Litres
Ref. Efficiency 4.19 %
EBP 106.25 Hz