What about this one:

enter · 7th February 2006, 02:10 PM

Hi

I am planing on building a sub for useing it for home theater and music with a bpa200 amp. Will this VISATON W 300 S 8 OHM be suitable??? In a vented box, what will be the best F3 ?
Here is the T/S :

W 300 S 8 OHM
---------------------------
Rated power 150 Watt
Maximum power 200 Watt
Nominal impedance 8 Ohm
Frequency response (-10 dB) fu - 4200 Hz
(fu: Lower cut-off frequency depending on cabinet) .
Mean sound pressure level 92 dB (1W/1m)
Maximum cone displacement 28 mm
Resonance frequency fs 23 Hz
Magnetic induction 1,1 Tesla
Magnetic flux 1400 µ Weber
Height of front pole-plate 8 mm
Voice coil diameter 5 cm
Height of winding 1,85 cm
Cutout diameter 28 cm
Net weight 4,5 kg
D.C. resistance Rdc 6,7 Ohm
Mechanical Q factor Qms 1,65
Electrical Q factor Qes 0,42
Total Q factor Qts 0,33
Equivalent volume Vas 340 l
Effective piston area Sd 507 cm2
Dynamically moved mass Mms 57 g
Force factor Bxl 11 T · m
Inductance of the voice coil L 1,8 mH

Thanks

richie00boy · 7th February 2006, 02:24 PM

The box will be pretty big (relative to what I call big, which is bigger than 60 litres) for vented.

sreten · 7th February 2006, 02:27 PM

/sreten.

enter · 7th February 2006, 02:58 PM

With a box max 70 liter i will be ok but i think the F3 is not the suitable for a home theater usage.Is it?

Thanks

richie00boy · 7th February 2006, 03:23 PM

With a 70 litre limit you are going to struggle to get a low enough F3 for anything, and the response in a vented box at least will be very peaky.

This is a job for a sealed box and Linkwitz Transform.

enter · 8th February 2006, 10:05 PM

Hi richie00boy

Thanks for the help.I think i will go with a beter sub.Have a look at this infinity.The only disadvantages is it coasts 50euro more than the visaton and i am afraid that the bpa200 will run hote with a 4ohm load.I think this one can go 20hz F3 in vented.

Kappa 120.3se 12" Woofer

VOICE COIL DC RESISTANCE: REVC (OHMS) . . . . . . 3.56
VOICE COIL INDUCTANCE @ 1 KHZ: LEVC (MH) . . . . . . . 2.13
DRIVER RADIATING AREA: SD (IN2) . . . . . . . . 76.11
SD (CM2) . . . . . . 491.00
MOTOR FORCE FACTOR: BL (TM) . . . . . . . . 15.51
COMPLIANCE VOLUME: VAS (FT3) . . . . . . . . 1.96
VAS (LITERS) . . . . . 55.61
SUSPENSION COMPLIANCE: CMS (ìM/N) . . . . 162.44
MOVING MASS, AIR LOAD: MMS (GRAMS). . . . 193.00
MOVING MASS, DIAPHRAGM: MMD (GRAMS) . . . 186.74
FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 28.43
MECHANICAL Q: QMS . . . . . . . . . . . 6.82
ELECTRICAL Q: QES . . . . . . . . . . . . 0.51
TOTAL Q: QTS . . . . . . . . . . . . 0.48
MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 0.39
HAG (MM) . . . . . . . 10.00
VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 1.46
HVC (MM) . . . . . . . 37.00
MAXIMUM EXCURSION: XMAX (IN) . . . . . . . . 0.53
XMAX (MM) . . . . . . 13.50

Thanks

sreten · 9th February 2006, 08:43 AM

Hi,

~50L sealed, 100L reflex - port tuning 20 to 23 Hz.

/sreten.

7th February 2006, 02:10 PM	#1
enter diyAudio Member Join Date: Jun 2005 Location: Athens	What about this one: Hi I am planing on building a sub for useing it for home theater and music with a bpa200 amp. Will this VISATON W 300 S 8 OHM be suitable??? In a vented box, what will be the best F3 ? Here is the T/S : W 300 S 8 OHM --------------------------- Rated power 150 Watt Maximum power 200 Watt Nominal impedance 8 Ohm Frequency response (-10 dB) fu - 4200 Hz (fu: Lower cut-off frequency depending on cabinet) . Mean sound pressure level 92 dB (1W/1m) Maximum cone displacement 28 mm Resonance frequency fs 23 Hz Magnetic induction 1,1 Tesla Magnetic flux 1400 µ Weber Height of front pole-plate 8 mm Voice coil diameter 5 cm Height of winding 1,85 cm Cutout diameter 28 cm Net weight 4,5 kg D.C. resistance Rdc 6,7 Ohm Mechanical Q factor Qms 1,65 Electrical Q factor Qes 0,42 Total Q factor Qts 0,33 Equivalent volume Vas 340 l Effective piston area Sd 507 cm2 Dynamically moved mass Mms 57 g Force factor Bxl 11 T · m Inductance of the voice coil L 1,8 mH Thanks

7th February 2006, 02:24 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	The box will be pretty big (relative to what I call big, which is bigger than 60 litres) for vented. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

7th February 2006, 03:23 PM	#5
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	With a 70 litre limit you are going to struggle to get a low enough F3 for anything, and the response in a vented box at least will be very peaky. This is a job for a sealed box and Linkwitz Transform. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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7th February 2006, 02:58 PM	#4
enter diyAudio Member Join Date: Jun 2005 Location: Athens	With a box max 70 liter i will be ok but i think the F3 is not the suitable for a home theater usage.Is it? Thanks

8th February 2006, 10:05 PM	#6
enter diyAudio Member Join Date: Jun 2005 Location: Athens	Hi richie00boy Thanks for the help.I think i will go with a beter sub.Have a look at this infinity.The only disadvantages is it coasts 50euro more than the visaton and i am afraid that the bpa200 will run hote with a 4ohm load.I think this one can go 20hz F3 in vented. Kappa 120.3se 12" Woofer VOICE COIL DC RESISTANCE: REVC (OHMS) . . . . . . 3.56 VOICE COIL INDUCTANCE @ 1 KHZ: LEVC (MH) . . . . . . . 2.13 DRIVER RADIATING AREA: SD (IN2) . . . . . . . . 76.11 SD (CM2) . . . . . . 491.00 MOTOR FORCE FACTOR: BL (TM) . . . . . . . . 15.51 COMPLIANCE VOLUME: VAS (FT3) . . . . . . . . 1.96 VAS (LITERS) . . . . . 55.61 SUSPENSION COMPLIANCE: CMS (ìM/N) . . . . 162.44 MOVING MASS, AIR LOAD: MMS (GRAMS). . . . 193.00 MOVING MASS, DIAPHRAGM: MMD (GRAMS) . . . 186.74 FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 28.43 MECHANICAL Q: QMS . . . . . . . . . . . 6.82 ELECTRICAL Q: QES . . . . . . . . . . . . 0.51 TOTAL Q: QTS . . . . . . . . . . . . 0.48 MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . . 0.39 HAG (MM) . . . . . . . 10.00 VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 1.46 HVC (MM) . . . . . . . 37.00 MAXIMUM EXCURSION: XMAX (IN) . . . . . . . . 0.53 XMAX (MM) . . . . . . 13.50 Thanks

9th February 2006, 08:43 AM	#7
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, ~50L sealed, 100L reflex - port tuning 20 to 23 Hz. /sreten.

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