Playing with car stereo myself. These guys have the whole sound pressure thing down. Windows re-enforced, doors screwed down submarine style. NO ONE IN THE CAR. Remotely controlled. 180.5 db http://gizmodo.com/gadgets/world-record/car-subwoofer-world-record-set-at-1805db-298304.php dave Hfjord wrote: >I'll far from utilize those watts, maybe just milliseconds >/Inge > >-----Ursprungligt meddelande----- >Från: TechNet [mailto:[log in to unmask]] För Ahne Oosterhof >Skickat: den 20 september 2007 17:18 >Till: [log in to unmask] >Ämne: Re: [TN] NTC:subwoofer > >400 Watt and a 4 Ohm speaker?!? Make sure you have high temperature >insulation on the speaker cables and watch out for the broken window glass. >That's why Philips made 400 and 800 Ohm speakers. Still got some. > >Ahne. > > >-----Original Message----- >From: TechNet [mailto:[log in to unmask]] On Behalf Of Hfjord >Sent: Wednesday, 19 September, 2007 13:57 >To: [log in to unmask] >Subject: [TN] NTC:subwoofer > >Audio techies, >I've built a subwoofer with a 15" 400 Watt loadspeaker (4 Ohms). Bought a >200 Watt low frequency 12 V amplifier. For that one, I built a 12 VDC power >supply with 15 A toroid, regulator, OP amplifier and a backup consisting of >totally 100,000 uF on the output. What is your experience? Will these caps >be enough to take the short power tops in Space War or the enormous sound >effects in Matrix or Jurassic Park? Any thumb rules or maths? >/Inge > >--------------------------------------------------- >Technet Mail List provided as a service by IPC using LISTSERV 15.0 To >unsubscribe, send a message to [log in to unmask] with following text in the >BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or >(re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet >NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send >e-mail to [log in to unmask]: SET Technet Digest Search the archives of >previous posts at: http://listserv.ipc.org/archives Please visit IPC web >site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional >information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 >ext.2815 >----------------------------------------------------- > >--------------------------------------------------- >Technet Mail List provided as a service by IPC using LISTSERV 15.0 >To unsubscribe, send a message to [log in to unmask] with following text in >the BODY (NOT the subject field): SIGNOFF Technet >To temporarily halt or (re-start) delivery of Technet send e-mail to >[log in to unmask]: SET Technet NOMAIL or (MAIL) >To receive ONE mailing per day of all the posts: send e-mail to >[log in to unmask]: SET Technet Digest >Search the archives of previous posts at: http://listserv.ipc.org/archives >Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 >for additional information, or contact Keach Sasamori at [log in to unmask] or >847-615-7100 ext.2815 >----------------------------------------------------- > >--------------------------------------------------- >Technet Mail List provided as a service by IPC using LISTSERV 15.0 >To unsubscribe, send a message to [log in to unmask] with following text in >the BODY (NOT the subject field): SIGNOFF Technet >To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) >To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest >Search the archives of previous posts at: http://listserv.ipc.org/archives >Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 >----------------------------------------------------- > > > -- Dave Seymour, CID+ Catapult Communications Inc. 800 Perimeter Park Dr, Suite A Morrisville, NC 27560 Direct: (919)653-4249 Main: (919)653-4180 Fax: (919)653-4297 [log in to unmask] ********************************************************************************************************* "This e-mail (and any attachments) is confidential and privileged information of Catapult Communications" ********************************************************************************************************* --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------