Comparison of sub drivers - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 6th January 2009, 06:57 AM   #1
Vivek is offline Vivek  India
diyAudio Member
 
Join Date: Nov 2000
Location: Bangalore, India
Default Comparison of sub drivers

Hi all,
I have a pair of Infinity car subwoofers (12 inch). And comparin the parameters of those and the Eminence Lab 12, I find that only a few parameters are different. The problem with the Infinity subs is that they seem to need a lot of power to be driven well though they are rated at 90dB.
One thing is that the inductance of the car sub is much higher. Could this be a factor in the car sub needing higher power? The force factor of both does not vary by too much. Any thoughts would be appreciated.
Below are the parameters of both.

Thanks and regards,
Vivek


LAB12
SPECIFICATION
Nominal Basket Diameter 12", 304.8mm
Nominal Impedance* 6 ohms
Power Rating
Watts 400W
Music Program 800W
Resonance 22Hz
Usable Frequency Range 25Hz-125Hz
Sensitivity*** 89.2
Magnet Weight 160 oz.
Gap Height 0.375", 9.53mm
Voice Coil Diameter 2.5", 63.5mm

THIELE & SMALL PARAMETERS
Resonant Frequency (fs) 22Hz
DC Resistance (Re) 4.29
Coil Inductance (Le) 1.48mH
Mechanical Q (Qms) 13.32
Electromagnetic Q (Qes) 0.39
Total Q (Qts) 0.38
Compliance Equivalent Volume (Vas) 125.2 liters / 4.4 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 659cc
Mechanical Compliance of Suspension (Cms) 0.35mm/N Product (BL) 15.0 T-M
Diaphram Mass inc. Airload (Mms) 146 grams
Efficiency Bandwidth Product (EBP) 56
Maximum Linear Excursion (Xmax) 13.0mm
Surface Area of Cone (Sd) 506.7 cm2
Maximum Mechanical Limit (Xlim) 22mm


Infinity Reference 1230W:
SENSITIVITY (2.83 V @ 1 M): 90 dB
POWER HANDLING: 300 W R M S 1200 WPEAK
FREQUENCY RESPONSE: 23 ~ 400 HZ
NOMINAL IMPEDANCE: 4 OHMS
VOICE-COIL DIAMETER: 2.0" (50.0 MM)

VOICE COIL DC RESISTANCE: REVC (OHMS) . . . . . . 3.40
VOICE COIL INDUCTANCE @ 1 KHZ: LEVC (MH) . . . . . . . 2.54
DRIVER RADIATING AREA: SD (IN2) . . . . . . . . 82.48
SD (M2) . . . . . . . 532.00
MOTOR FORCE FACTOR: BL (TM) . . . . . . . . 14.63
COMPLIANCE VOLUME: VAS (FT3) . . . . . . . . 2.78
VAS (LITERS) . . . . . 78.50
SUSPENSION COMPLIANCE: CMS (M/N) . . . . 195.40
MOVING MASS, AIR LOAD: MMS (GRAMS). . . . 174.21
MOVING MASS, DIAPHRAGM: MMD (GRAMS) . . . 167.15
FREE-AIR RESONANCE: FS (HZ) . . . . . . . . 27.27
MECHANICAL Q: QMS . . . . . . . . . . . 6.14
ELECTRICAL Q: QES . . . . . . . . . . . . 0.47
TOTAL Q: QTS . . . . . . . . . . . . 0.44
MAGNETIC-GAP HEIGHT: HAG (IN) . . . . . . . . 32.50
HAG (MM) . . . . . . . . 8.00
VOICE-COIL HEIGHT: HVC (IN) . . . . . . . . . 1.27
HVC (MM) . . . . . . . 32.50
MAXIMUM EXCURSION: XMAX (IN) . . . . . . . . 0.49
XMAX (MM) . . . . . . 12.25
__________________
Thank God for DIY audio.
  Reply With Quote
Old 6th January 2009, 07:36 AM   #2
diyAudio Member
 
Join Date: May 2001
Location: Bangalore, India
Vivek, it appears that a much smaller cab would be required for the Infinity driver as compared with the LabSub driver, if we are talking about a BR cab.
__________________
Sam
  Reply With Quote
Old 6th January 2009, 10:18 AM   #3
Vivek is offline Vivek  India
diyAudio Member
 
Join Date: Nov 2000
Location: Bangalore, India
Hi,
I have used a 62L box. And I do not understand what BR means. Could you please explain?

Vivek
__________________
Thank God for DIY audio.
  Reply With Quote
Old 6th January 2009, 10:39 AM   #4
diyAudio Member
 
Join Date: May 2001
Location: Bangalore, India
BR is Bass Reflex.
__________________
Sam
  Reply With Quote
Old 6th January 2009, 10:39 AM   #5
diyAudio Member
 
Moondog55's Avatar
 
Join Date: Jun 2007
Location: Norlane; Geelong: Victoria: Australia
BR = bass reflex ( I think ) a ported box
__________________
QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"
  Reply With Quote
Old 6th January 2009, 10:50 AM   #6
Vivek is offline Vivek  India
diyAudio Member
 
Join Date: Nov 2000
Location: Bangalore, India
Okay. Sorry it did not occur to me. My boxes are sealed.
Any more thoughts/opinions?

Vivek
__________________
Thank God for DIY audio.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Another cap comparison Conrad Hoffman Parts 57 29th May 2007 10:38 PM
TX9 Comparison dirtyk777 Subwoofers 0 15th March 2007 03:57 AM
DIY Comparison marcus555dc Subwoofers 0 21st February 2006 12:05 AM
AB comparison Raka Chip Amps 124 27th June 2003 09:06 PM


New To Site? Need Help?

All times are GMT. The time now is 04:17 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2