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#11 |
R.I.P.
Join Date: Jul 2004
Location: Scottish Borders
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Don't believe him !
__________________
regards Andrew T. |
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#12 |
diyAudio Member
Join Date: Feb 2009
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???
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#13 | |
diyAudio Member
Join Date: Feb 2004
Location: Barrow-In-Furness, Cumbria
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Hey ok thanks
The Le Monstre can work from 2x 12v car battery's i can see that working and that's a nice possibility. the JLH seems to be single rail but about 27v to power so... 2x battery's again which ill do if i have to. Quote:
Im actualy going to buy from ebay a broken Car amplifier you know the kind with large heat sinks 1000w amps etc as the chassis is perfect, I consider this a great idea as the terminals and all the plugs ill need will be already wired in too! Might as well make use of old parts! I can imagine probably the most wise solution would be using an amp that's Class A/B. but i have some kind of idea in my head that pure Class-A id like better lol and a more efficient amp for the sub woofer/bass... Last edited by Rixsta; 17th September 2012 at 01:18 PM. |
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#14 |
diyAudio Member
Join Date: Feb 2009
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the 10W JLH runs on lower voltage.
with a DC-DC converter you can have +/-40V if you like. siliconray have a 500W adjusteble sec and dual rail supply. something like that is good for 2ch F5. you can also use F5 with lower voltage and bias to make a mini F5 ![]() |
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#15 |
diyAudio Member
Join Date: Sep 2008
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Hi Rixta. It's not uncommon in car audio to install a second alternator and battery. That and an SMPS would give you whatever you want. My only thought was the comment that an F5 needed an hour to sound its' best. I am rarely in my car for more than an hour but that's just me. I think it's a great project. Good luck! Pics!
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#16 |
diyAudio Member
Join Date: Feb 2009
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regarding the warm up time. that is with passive cooling.
and you can't use that in a car ![]() ![]() |
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#17 |
diyAudio Member
Join Date: Sep 2008
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Thanks Audiosan! That makes perfect sense. I love the idea. Gotta find room for another alternator...
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#18 |
diyAudio Member
Join Date: Feb 2004
Location: Barrow-In-Furness, Cumbria
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Well thanks for the replys! i was originally planning on building something but interestingly i ended up with an already built DIY "Le Monstre"!
which i purchased from ebay, it will be interesting to hear how this thing sounds. i wanted to win it so i kept bidding right to the last moment ![]() Here it is 2x20 watts 12v Car Amplifier Class A, 2x20W (J .Hiraga schematic) no audison, brax, dls | eBay Any Comments ? ill have to see whats in it! I think ill also find or build a JLH and Mini-A some time too so i can compare and give feedback here. ill probably be running 8ohm speakers on the amps. I agree about the F5 needing time, however it seems to sound good within a couple of minutes of on time. As regard to the "20W Le Monstre" I just have one question i need help with, what kind of battery's should i buy ? it would be nice if they were not as big as a giant car battery. i should think i would have the amp on for 3 hours at a time max. usualy 1. then i need a good charging circuit to charge batterys from mains. for some reason i imagine having 2x series 6v battery's that's what my intuition tells me, but you can tell i don't really know what im doing yet lol for now ill run it from a PSU buy battery's later i think Iv'e not realy looked into how much this monster draws. Cheers Riki Last edited by Rixsta; 23rd September 2012 at 09:47 PM. |
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#19 |
diyAudio Member
Join Date: Aug 2005
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Was curious about those, but didn't know how noisy they were...if they were.
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