Wiec tak: Czytalem, myslalem...czytalem jeszcze raz, zastanawialem sie i dalej nie jestem pewien...jaka wybrac obudowe:) Jakis czas temu zbudowalem obudowe w celu (naglosnienia gitary basowej, miala jakies 170 l) typu b-r jednak niegrala ona tak jak chcialem, malo basu itd. Dzis wiem co zrobilem zle, przypadkowe rury b-r itd. Teraz postanowilem przelozyc glosnik do innej juz popraniej skonstruowanej skrzyni...dalej mysle o b-r ale niewiem jak to przy 0.49 Qts czy jest sens, a co do obudowy zamknietej to w artykule na stronie jest napisane
"(...)jednak przy dużym głośniku i tak zejdzie wystarczająco nisko (musimy posiadać głośnik o niskim Fs(...)"
Niskie to znaczy ile umnie to 40 Hz.Zreszta takie sa parametry mojego glosnika (bede wdzieczny za wszelkie sugestie):
Eminence Delta 15"
Impedance: 8 ohm
Power Rating: 300 Wrms
Resonance: 40hz
Usable Frequency Range: 40hz-4khz
Average Sensitivity 1W@1m: 101db
Magnet Weight: 50 oz.
Magnet Gap Depth: 0.75", 9,53
Voice Coil Diameter: 2,5", 63,5 mm
Overall Diameter: 15,1" 381,7 mm
Baffle Hole Diameter: 14,125", 359 mm
Front Sealing Gasket: fitted as standard
Rear Sealing Gasket: fitted as standard
Mounting Holes Diameter: 0,275", 7mm
Mounting Hole PDC: 14,562", 369,9mm
Depth: 6,05", 153,6 mm
Resonant Frequency: (fs) 40Hz
Impedance: (Re) 6,9 ohms
Coil Inductance: (le) 0,86mH
Electromagnetic Q: (Qes) 0,54
Mechanical Q: (Qms) 6,56
Total Q: (Qts) 0,49
Compliance Equivalent Volume: (Vas) 293 liters 10,4 cu.ft
Peak Diaphragm Displacement Volume: (vd) 231cc
Mechanical Compliance of Suspension: (Cms) 0.28mm/N
BL Product: (BL) 13.6 T-M
Diaphragm Mass inc Airload: (Mms) 55 grams
Equiv.Resistance of Mechanical Suspension Loss: (rms) 2.12N* sec/M
Efficiency Bandwidth Product: (EBP) 77
Voice Coil Overhang: (Xmax) 2.7mm
Surface Area of Cone: (Sd) 856.3cm2
Impedance at Resonance: (Zmax) 52 ohms
Materials of Construction
* Kapton coil former
* Polyamide-imide coated aluminum voice coil
* Ferrite magnet * Pressed steel basket * Paper cone
cloth cone edge * Solid composition paper dust cap
For all high power bass applications including bass guitar.
"(...)jednak przy dużym głośniku i tak zejdzie wystarczająco nisko (musimy posiadać głośnik o niskim Fs(...)"
Niskie to znaczy ile umnie to 40 Hz.Zreszta takie sa parametry mojego glosnika (bede wdzieczny za wszelkie sugestie):
Eminence Delta 15"
Impedance: 8 ohm
Power Rating: 300 Wrms
Resonance: 40hz
Usable Frequency Range: 40hz-4khz
Average Sensitivity 1W@1m: 101db
Magnet Weight: 50 oz.
Magnet Gap Depth: 0.75", 9,53
Voice Coil Diameter: 2,5", 63,5 mm
Overall Diameter: 15,1" 381,7 mm
Baffle Hole Diameter: 14,125", 359 mm
Front Sealing Gasket: fitted as standard
Rear Sealing Gasket: fitted as standard
Mounting Holes Diameter: 0,275", 7mm
Mounting Hole PDC: 14,562", 369,9mm
Depth: 6,05", 153,6 mm
Resonant Frequency: (fs) 40Hz
Impedance: (Re) 6,9 ohms
Coil Inductance: (le) 0,86mH
Electromagnetic Q: (Qes) 0,54
Mechanical Q: (Qms) 6,56
Total Q: (Qts) 0,49
Compliance Equivalent Volume: (Vas) 293 liters 10,4 cu.ft
Peak Diaphragm Displacement Volume: (vd) 231cc
Mechanical Compliance of Suspension: (Cms) 0.28mm/N
BL Product: (BL) 13.6 T-M
Diaphragm Mass inc Airload: (Mms) 55 grams
Equiv.Resistance of Mechanical Suspension Loss: (rms) 2.12N* sec/M
Efficiency Bandwidth Product: (EBP) 77
Voice Coil Overhang: (Xmax) 2.7mm
Surface Area of Cone: (Sd) 856.3cm2
Impedance at Resonance: (Zmax) 52 ohms
Materials of Construction
* Kapton coil former
* Polyamide-imide coated aluminum voice coil
* Ferrite magnet * Pressed steel basket * Paper cone
cloth cone edge * Solid composition paper dust cap
For all high power bass applications including bass guitar.