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12v bike rig - Advice needed!

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slaz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote slaz Quote  Post ReplyReply Direct Link To This Post Posted: 07 April 2021 at 5:27pm
Originally posted by Jack1991 Jack1991 wrote:

Not sure if your planning on powering the DSP off the same battery as the amplifier? 

But i have just been told on another forum that doing that can cause voltage drop outs. Causing the DSP to lose power momentarily. 


Hmm .... well I can see how that might well be a problem with a lead-acid battery in less-than-optimal condition and/or near the end of its discharge cycle - and ragging the amplifier hard.

I try (where possible/viable) to power ancillary bits of kit from their own batteries. We'd need to know the current consumption of the DSP .... I can see it would use a few watts - maybe somehting like 0.5A or so at a guess - so to play all day you might want 12V 5Ah or so.

My 7-band car EQ (yeah, I know ... doesn'treally seem to degrade the signal though) uses about 200mA. I've always used a separate battery for that .... but its easy when (like me)  you've built up a stash of various batteries over the years.

BTW - it also neatly side-steps posible ground-loop issues.



Edited by slaz - 07 April 2021 at 5:29pm
REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jack1991 Quote  Post ReplyReply Direct Link To This Post Posted: 07 April 2021 at 5:48pm
Cool cheers Slaz, ground loop issues is another thing i have not heard of before. Ill have a look into that. I have just got a t.racks 12v dsp so have just been reading up trying to make sure im powering it correctly off a battery. Hoping the info helps CFLsound too 

Edited by Jack1991 - 07 April 2021 at 5:51pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bfbs Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2021 at 9:05pm
Moin.
I habe your project.
1 mbh118 / 1/2 EVMTL1 with Rcf L18S801
Carpower wanted 2x600 bridges. For 1kw @4ohm
The Sub has 8ohm so only 500w go into the Sub.
A swtiching Inverter for 230v pure sin1kw
Any aktive top for the rest.
Two agm with 95ah 
And you will have more than 6 hours Fun.
I use this in two bikes paired with a guitar bug.
Stereo for chritical mass...
Runs in north oft germany. 
The weight is ca 120kg for the PA.

https://werkstatt-lastenrad.de/index.php?title=Datei:20180525_210347.jpg

I have build the Bike by my selve because there is no Seller of Cargobikes for this Load Volumen by weight.
Bud You have a Trailer thats easyer to handle.


Edited by bfbs - 07 May 2021 at 10:34pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bfbs Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2021 at 9:29pm
Ground Loop....
It is a crazy think.
On my Bike i have one audiosignal on 12V for the Sub Amp, one audiosignal for a littel mixing desk on 230v with a real transformer (galvanically isolated) ant a Opera 402D in an unknown Status.
I mu├čt Isolate the Amp for the Sup to get no 50hz Noize.
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