Last time I cranked up my system my subwoofer was emitting this horrible crackling noise... found a "Bob the Builder" toy crane on top of the cone. If I was running Inge's power levels I could have blown that thing through the roof!!! Can we wreck it? Yes we can!!! >>> Phil Nutting 09/20/07 12:43PM >>> I'm jealous. If I run anything louder than a whisper my family complains. My cheap $10 computer speakers get me by. Sigh. I did have a chance to turn up the big stereo system one day when my daughter said her system was louder than mine. He, He, He, children are so innocent. Seeing the challenge I sent her to her room to "turn up her system". Once up there I put our old, 30+ years, stereo up to about half volume. She quickly conceded. Speaking of deaf neighbors, I was renting the house next door (100 feet away) to a friend. One day while sitting on my sofa I started bouncing up and down as the earth vibrated. Seems my renter had turned up his system while playing the Eurhythmics "Sweet Dreams Are Made of These". Think what it was like inside his house. Phil -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Eric CHRISTISON Sent: Thursday, September 20, 2007 11:26 AM To: [log in to unmask] Subject: Re: [TN] NTC:subwoofer Are your neighbours deaf or do you live in the countryside? Ahne Oosterhof wrote: > 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 > ----------------------------------------------------- > > -- Eric Christison Msc Mechanical Engineer Home Personal, Communication Sector Imaging Division STMicroelectronics (R&D) Ltd 33 Pinkhill Edinburgh EH12 7BF United Kingdom Tel: +44 (0)131 336 6165 Fax: + 44 (0)131 336 6001 --------------------------------------------------- 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 -----------------------------------------------------