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holl_ands | Home > Files by holl_ands > Browse:OTA Reception FilesDTV, TV and FM Tower LocationsInterference (EMI) to DTV & DTT4nec2 & Python Optimization BenchmarksLoudspeaker Comparison
Loudspeaker Comparison Loudspeaker Comparisons: Peerless SWR-308 12-in XLS Sub-Woofer (p/n 830500) in CLOSED, VENTED, PASSIVE RADIATOR (NOT Optimized, simply tried a second, unconnected SWR-308) and BANDPASS SINGLE TUNED Boxes.  In response to: https://www.avsforum.com/forum/89-speakers/2882033-speaker-ticking-noise.html#post53999617 Excel Spread Sheet at bottom contains an [old] database of "T/S" Parameters for MANY Speakers, or you can add you own Speaker "T/S" Parameters obtained from mfr's literature. Click on Thumbnail to see Higher-Rez Version. UPDATE (29Sep2018): Added Charts for Infinite Baffle or Transmission Line, simulated by Very Large 1000-liter (35.3 cu. ft.) Closed Box. Date(s): 1 Jul 2017. Album by holl_ands. 1 - 18 of 18 Total. 1531 Visits.
enlarge 28KB, 1152x697 1 Compare Closed to Vented Box [Ignore Bandpass] SPL Frequency Response enlarge 28KB, 1152x696 2 Compare Closed to Vented Box [Ignore Bandpass] Peak Cone Excursion enlarge 29KB, 1152x695 3 Compare Closed to Vented Box [Ignore Bandpass] Voltage Impulse Step Response enlarge 23KB, 1152x696 4 Closed Box = 47-liters SPL Frequency Response enlarge 21KB, 1152x693 5 Closed Box = 47-liters Peak Cone Excursion enlarge 21KB, 1152x694 6 Closed Box = 47-liters Voltage Impulse Step Response Overly Large Box Size has slow Response time. "Critically Damped" Box Size is 7-9 liters, with higher Low Freq Roll-off Freq enlarge 31KB, 1152x696 7 Bass-Reflex Box = 60-liters [for 1-dB Boost] SPL Frequency Response enlarge 23KB, 1152x695 8 Bass-Reflex Box = 60-liters [for 1-dB Boost] Peak Cone Excursion enlarge 23KB, 1152x694 9 Bass-Reflex Box = 60-liters [for 1-dB Boost] Voltage Impulse Step Response Note "RINGING" [Thump-eta-tah] enlarge 23KB, 1152x696 10 Bass-Reflex Box = 60-liters [for 1-dB Boost] Port Air Speed [Susceptibility to Chuffing] enlarge 27KB, 1152x696 11 Bass-Reflex Box = 60-liters [for 1-dB Boost] Speaker Impedance [When in the Box] enlarge 24KB, 1152x695 12 Closed Box = 47-liters Speaker Impedance [When in the Box] enlarge 23KB, 1152x696 13 Infinite Baffle or Transmission Line [Simulated by Very Large 1000-liter Closed Box] SPL Frequency Response enlarge 22KB, 1152x693 14 Infinite Baffle or Transmission Line [Simulated by Very Large 1000-liter Closed Box] Peak Cone Excursion enlarge 21KB, 1152x694 15 Infinite Baffle or Transmission Line [Simulated by Very Large 1000-liter Closed Box] Voltage Impulse Step Response enlarge 27KB, 1152x695 16 Infinite Baffle or Transmission Line [Simulated by Very Large 1000-liter Closed Box] Speaker Impedance approximates FREE AIR Response enlarge 20KB, 1152x695 17 Infinite Baffle or Transmission Line [Simulated by Very Large 1000-liter Closed Box] Peak Current Drawn from Power Amplifier Peak POWER is SAME if 1-Volt Peak Voltage enlarge 3.42MB, 723x1024 18 Unibox Excel Spread Sheet Calculator Click Once to reveal *xls Download link
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