AvsB: Max. Acoustic Output? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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
Thread Tools Search this Thread
Old 26th November 2011, 09:06 PM   #1
ro9397 is offline ro9397  United States
diyAudio Member
Join Date: Jan 2007
Location: No. Utah
Thumbs up AvsB: Max. Acoustic Output?

AvsB: Maximum Acoustic Output

I employ a distributed sub array with four 10” that is clean, transparent and exhibits no proximity effect crossed @ 135 Hz (active LP crossover, presumably 4th order but not positive).

Main speakers employ the following dual-pole line-level high-pass crossover:
1st order @ 2.2 kHz
3rd order @ 80 Hz
Per my math, relative to 2.2 kHz, the above crossover yields -32 dB @ 80 Hz, -68 dB @ 20 Hz. I can only presume the resulting proper tonal balance relates to the room’s acoustics + the response of the mid-bass employed: one per channel Dynaudio 17WLQ Esotec 8-Ohm 17cm, refer to "8-Ohm" (not 4-Ohm) datasheet HERE (crosses to a dome tweeter @ 2.2 kHz).

I consider replacing the single 17WLQ with four 5cm square full-range drivers with these specs:

Parameter Description Min Typical Max Units
Re DC resistance 10% 7.9 +10% Ohms
Le Inductance -10% 0.137 +10% mH
BL Force factor 3.87 Tm
fs Resonance frequency -20% 148 +20% Hz
dDrv Voice coil diameter 25.4 mm
Mms Moving mass 1.68 g
Cms Compliance 0.70 mm N-1
Rms Suspension Loss 0.49 Ns m-1
Sd Radiating Area 17.2 cm2
Xmax Maximum coil excursion (p-p) 7.0 mm
Sd Effective piston area 17.2 cm2
VAS Equivalent volume 0.29 L
Qms Mechanical quality factor 3.18
Qes Electrical quality factor 0.83
Qts Total quality factor 0.66
Sens Sensitivity 83 dB/W/M

5cm Test Conditions Value
Continuous power handling (weighted pink noise) 12W (TBC)
Burst power handling (weighted pink noise) >24W (TBC)
Operating temperature range -20 to 55° C
Audio frequency range 80Hz to 20kHz (these values likely inflated)


One 17WLQ mid-bass: 86 dB
Four 5cm square full-range: 89 dB

Suppose maximum power of the associated amp exceeds driver power handling. From about 150-2.2 kHz, with the above described line-level filters, how does maximum acoustic output compare, one 17WLQ vs. four 5cm? The 5cm FR graph is flat over to over 10 kHz (I intend to cross it around 6 kHz to a planar magnetic tweeter).

"Television is the poor man's whiskey." Russel Baker
  Reply With Quote


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
Max/Actual Output Level vs. Distortion gootee Solid State 3 13th February 2010 08:41 AM
max. output for two 5881 tubes? tonskulus Tubes / Valves 7 22nd January 2007 12:00 AM
Max current output of USB port...? jamesjung21 Everything Else 3 5th June 2006 06:33 AM
Aleph60 max output current g_low Pass Labs 1 9th July 2003 08:18 PM
Max power output chart for SE and PP ashok Tubes / Valves 2 27th June 2003 09:18 AM

New To Site? Need Help?

All times are GMT. The time now is 02:43 AM.

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