 Can my 914 run on a 14v battery?, Will it tolerate it? |
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| Rod |
 Oct 27 2010, 03:38 PM
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#1
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Senior Member  Group: Members Posts: 617 Joined: 1-January 08 From: Farnham UK Member No.: 8,526 Region Association: England  |
I'm into my hi end car audio and I have a 14v agm battery - would I be able to use this in the 914?
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| windforfun |
Oct 28 2010, 03:01 PM
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#2
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Advanced Member Group: Members Posts: 2,054 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None 
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Do you use "pi" filters to eliminate engine noise?
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| Rod |
Oct 28 2010, 03:12 PM
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#3
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Senior Member Group: Members Posts: 617 Joined: 1-January 08 From: Farnham UK Member No.: 8,526 Region Association: England |
QUOTE(windforfun @ Oct 28 2010, 10:01 PM)  Do you use "pi" filters to eliminate engine noise? What the hell are they? (IMG:style_emoticons/default/idea.gif) No I dont. If you have a system wired correctly first time round without any ground loops you will have zero noise! |
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| windforfun |
Oct 28 2010, 03:45 PM
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#4
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Advanced Member Group: Members Posts: 2,054 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None
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QUOTE(Rod @ Oct 28 2010, 02:12 PM) QUOTE(windforfun @ Oct 28 2010, 10:01 PM) Do you use "pi" filters to eliminate engine noise? What the hell are they? (IMG:style_emoticons/default/idea.gif) No I dont. If you have a system wired correctly first time round without any ground loops you will have zero noise! The schematic looks like the Greek letter pi. Two caps & one choke. I agree, ground loops are bad, but I disagree about zero noise. Teach me. I've always run into either alternator noise (direct coupled) or ignition noise (RFI perhaps) issues with my sound system installations. Maybe your McIntosh gear has built in power supply filters. Yes? No? Thanks. |
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| Rod |
Oct 28 2010, 03:55 PM
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#5
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Senior Member Group: Members Posts: 617 Joined: 1-January 08 From: Farnham UK Member No.: 8,526 Region Association: England |
QUOTE(windforfun @ Oct 28 2010, 10:45 PM) QUOTE(Rod @ Oct 28 2010, 02:12 PM) QUOTE(windforfun @ Oct 28 2010, 10:01 PM) Do you use "pi" filters to eliminate engine noise? What the hell are they? (IMG:style_emoticons/default/idea.gif) No I dont. If you have a system wired correctly first time round without any ground loops you will have zero noise! The schematic looks like the Greek letter pi. Two caps & one choke. I agree, ground loops are bad, but I disagree about zero noise. Teach me. I've always run into either alternator noise (direct coupled) or ignition noise (RFI perhaps) issues with my sound system installations. Maybe your McIntosh gear has built in power supply filters. Yes? No? Thanks. OK I'm using a HU, a pro audio (Alto UCS Pro) processor, two amps and 7 speakers in my 914 and it's noiseless.. Alt noise is always because of ground loops. A ground loop can be caused by so many things - stargrounding is a good idea and also look at the quality of your grounding points - most people don't want to drill into the chassis so use a seatbelt mounting bolt as the amp grounding point, but was the paint removed prior to bolting up? is it against bare metal... etc and you can then easily see the problems.. I have all my equipment grounded to the battery - HU too - I have run both positive and negative circuits around the car to feed all the equipment ( I hate relying on chassis points as they can corrode, especially on a car as old as me!!) If you want to have a browse of a good car audio forum over in the UK, have a look at www.talkaudio.co.uk - a great site and lots of you Americans are coming over to it as it's got a superb European audience - not that I'm biased as a moderator! |
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| windforfun |
Oct 28 2010, 04:03 PM
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#6
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Advanced Member Group: Members Posts: 2,054 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None
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QUOTE(Rod @ Oct 28 2010, 02:55 PM) QUOTE(windforfun @ Oct 28 2010, 10:45 PM) QUOTE(Rod @ Oct 28 2010, 02:12 PM) QUOTE(windforfun @ Oct 28 2010, 10:01 PM) Do you use "pi" filters to eliminate engine noise? What the hell are they? (IMG:style_emoticons/default/idea.gif) No I dont. If you have a system wired correctly first time round without any ground loops you will have zero noise! The schematic looks like the Greek letter pi. Two caps & one choke. I agree, ground loops are bad, but I disagree about zero noise. Teach me. I've always run into either alternator noise (direct coupled) or ignition noise (RFI perhaps) issues with my sound system installations. Maybe your McIntosh gear has built in power supply filters. Yes? No? Thanks. OK I'm using a HU, a pro audio (Alto UCS Pro) processor, two amps and 7 speakers in my 914 and it's noiseless.. Alt noise is always because of ground loops. A ground loop can be caused by so many things - stargrounding is a good idea and also look at the quality of your grounding points - most people don't want to drill into the chassis so use a seatbelt mounting bolt as the amp grounding point, but was the paint removed prior to bolting up? is it against bare metal... etc and you can then easily see the problems.. I have all my equipment grounded to the battery - HU too - I have run both positive and negative circuits around the car to feed all the equipment ( I hate relying on chassis points as they can corrode, especially on a car as old as me!!) If you want to have a browse of a good car audio forum over in the UK, have a look at www.talkaudio.co.uk - a great site and lots of you Americans are coming over to it as it's got a superb European audience - not that I'm biased as a moderator! Wow!!! Very cool!!! Got any pics? Thanks!!! (IMG:style_emoticons/default/drooley.gif) (IMG:style_emoticons/default/drooley.gif) (IMG:style_emoticons/default/drooley.gif) |
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Posts in this topic
Rod Can my 914 run on a 14v battery? Oct 27 2010, 03:38 PM
benalishhero I say you would have an amp issue though. Oct 27 2010, 03:53 PM
Rod
I say you would have an amp issue though.
No th... Oct 27 2010, 03:55 PM underthetire Don't see why not. Charging system is ~13.8 wh... Oct 27 2010, 04:12 PM Rod No, not lithium - they are sealed lead acid batte... Oct 27 2010, 04:16 PM jsayre914 I have been running dual kinetik batteries for som... Oct 27 2010, 04:31 PM Rod
I have been running dual kinetik batteries for so... Oct 27 2010, 04:43 PM jsayre914
[quote name='jsayre914' post='1387568' date='Oct ... Oct 28 2010, 12:47 PM windforfun
Don't see why not. Charging system is ~13.8 w... Oct 27 2010, 04:44 PM kg6dxn Many racers run 16 Volt dual tap batteries (12V/16... Oct 27 2010, 06:48 PM monkeyboy How much more power are you getting at 14v? Is it ... Oct 28 2010, 12:24 PM kg6dxn
How much more power are you getting at 14v? Is it... Oct 28 2010, 01:07 PM windforfun I sort of agree, but remember that your amps aren... Oct 28 2010, 01:48 PM mskala It's been a while since I've had a -4, but... Oct 28 2010, 02:31 PM Rod
It's been a while since I've had a -4, bu... Oct 28 2010, 02:53 PM jsayre914
Oh and to the other nutter with all the Phoenix ... Oct 28 2010, 03:17 PM Rod
Wow!!! Very cool!!! Got... Oct 28 2010, 04:13 PM windforfun
Wow!!! Very cool!!! Go... Oct 28 2010, 04:22 PM messix here ya go. just need to do same fab work to make ... Oct 28 2010, 03:18 PM messix here ya go. just need to do same fab work to make ... Oct 28 2010, 03:20 PM Rod
here ya go. just need to do same fab work to make... Oct 28 2010, 03:34 PM messix prolly not.
go check over on the samba and see if... Oct 28 2010, 03:36 PM stugray Rod,
"So anyone that has a cap that says it ... Oct 28 2010, 04:22 PM Rod
Rod,
"So anyone that has a cap that says it... Oct 28 2010, 04:31 PM jsayre914 :agree:
You dont need a cap, but an extra batter... Oct 28 2010, 04:35 PM Rod
:agree:
You dont need a cap, but an extra batte... Oct 28 2010, 04:39 PM windforfun I use KEFs & Tannoys at home. I just don... Oct 28 2010, 04:43 PM windforfun This is as far as I got.
Oct 28 2010, 04:45 PM kg6dxn The theory behind the "stiffening Cap" i... Oct 28 2010, 07:09 PM Cap'n Krusty Your FI control unit doesn't like either low o... Oct 28 2010, 07:14 PM windforfun Most interesting. You guys know your shit. Oct 28 2010, 07:22 PM |
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