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Battery as a power supply? 6 months 3 weeks ago #59692

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Can i use solar powered 12V battery as psu for MiniDSP Flex? I will use a 2-3 A fuse.

The battery will deliver from 11,9 to 13,4 V depending on the condition on the battery.

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Battery as a power supply? 6 months 2 weeks ago #59756

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Yes , 

ive hooked one up to a car battery. The issue is noise…. The battery charger will cause tremendous noise 

you will need the minidc isolator 

there sold on here for 15$ 

ive hooked one up to a flex and it worked. Powered and played for about 5hrs no issues 

if the battery won’t be charging while use it will supply nice clean usable power stand alone 

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Battery as a power supply? 6 months 2 weeks ago #59770

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Thx for your suggestion.

My main consern isnt noise but if Minidsp Flex is sensitive to variable voltage from ca 11,9-14V?

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Battery as a power supply? 6 months 2 weeks ago #59779

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No, it can be used I think from like 10-20v or something wide , I can’t remember honestly but I thought the manual said something like that 

ive put 16v into a 2x4hd by accident and it worked fine. 

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Battery as a power supply? 6 months 2 weeks ago #59781

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Can i use solar powered 12V battery as psu for MiniDSP Flex? I will use a 2-3 A fuse.

The battery will deliver from 11,9 to 13,4 V depending on the condition on the battery.

For what purpose?  Are you off the grid somewhere?

Dave.
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Battery as a power supply? 6 months 2 weeks ago #59782

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Yes. Solar powered off grid in the Norwegian mountains whitout electrical power and water. Just clean water in the pond which we can drink. And a outdoor loo  :)

 

 
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Battery as a power supply? 6 months 2 weeks ago #59788

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Aah yes , so you will be using a string of panels, or two or theee strings 

multiple solar chargers 

grid tie? 

a battery bank , if your using a 12v bank your crazy. It’s way too inefficient and you have bigger problems then stereos with dsp…

so assuming your using a 48v bank , or 96v bank 

get a buck type step down and the minidc dc to dc isolator from minidsp , and your good to go…

i completely agree getting as much off the inverter as you can is way way way more efficient….or you have a huge copper investment with all that 00ga wire you’ll be pulling with a 12v bank. 

it should be nice and clean power source (literally) and for your audio…

are you using car amps and using the flex as a source? That’s exactly what I did in my shop (I run a car stereo store) the flex is an amazing source. Make sure to use class D amps as they are far far far more efficient then an A/B or an A…



and on a side note , don’t ever buy modified sine inverters …. You’ll cook all your electronics except incandescent bulbs… go for pure sine and you’ll be good to go … and double the inverter size you’ll actually use. (kWh) 


but if by chance you want to have 300A fuses with double Ot gauge wire and run hundreds of amps through that parallel bank, (12v) you could hook the flex directly up…. It might pick up some noise from the charge converter (mttp) so again the minidc will isolate any of that noise and you’ll be good to go 


i have 7 260v strings. It powers everything (including ac) with a 3500ah 96v bank. I haven’t had a power bill in years and grid tie most of the time to help my neighbors. I took it all down since I moved but still have everything… the solar freezer sundanzer I still use hooked to my batteries and use one 100w panel to keep it charged. This next build I’m doing I’ve learned from my mistakes… all lithium batteries absolutely hands down or lip04 …. The wet cell is absolute garbage compared to what a lithium can do… the absorption is like 100 fold , you waste almost no panel power…. And a 20yr cycle life…. 

(all said light  hearted and with humor) 😵‍💫🥸🥸😎🤓🤓🤓🤓😁

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Battery as a power supply? 6 months 2 weeks ago #59790

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This is only a holiday cabin. My purpose with the solar power system is only light, charging of laptop/cell phone, music from a high efficient setup and now and then movie from a small HD projector. So far its working great with more than enough capasity.

I have to modern wood ovens, propane fridge and stove and a parafine/diesel oven for cabin use with the same technology as in boats.

The solar system is 2x100 Watt panels as you can see on the picture, 255 Ah AGM (i didnt choose Lithium since it is VERY cold in the winter) and Victron regulator, Victron charger and Victron pure sinus inverter. I also have a 3000 W gasolin generator for use in december and january in the dark winter light for extra charging of the battery.

The «off grid high eff hifi» will be feed by a Victron 12-30V DC  step up converter connected 30 cm from the battery and then only 1 m 2,5 mm2 cable from the step up to the amplifier.

The system:

Texas Instrument class D 3255 Evaluation Module 1/2/4 channel amplifier board. It runs from ca 20V to 48V. With 4 channel single ended setup i will maybe get 4x50 watt in 4 Ohm.

High eff Faital Pro 10 Inch PA midwoofer 4 Ohm and fs 50 Hz. 18 Sound XT1086 waveguide with Faital Pro 1 inch compression driver (the best who reminds of TAD 2001 in the response).

The clue here is a method not many have implemented. The enclosure will be 70 liter and the bass reflex tuning ca 70-90 Hz. This will give a to high impedance bump in the power consuming pass band. This is no problem because i can correct this with DSP and also  increase the bass below the tuning and include a subsonic filter. This shouldnt give problems with neither distortion nor to much force of the xmax. So this implementation will be very dynamic with a huge headroom from 30 Hz and up. An optimized system for high eff need for low power who can play LOUD :)


PS! This method can also be implemented with a passive crossover. The clue here is a series resistor on the midwoofer and also to high tuning.


 
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Battery as a power supply? 6 months 2 weeks ago #59797

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That sounds awesome!!

aah okay a getaway place… we’ll then as you were…..  I was like, wow if your going to be living there……..


what an awesome setup! I sold my tad2001s (I wish I didn’t) I haven’t tried the faital yet, I’ve heard it’s good. Maybe I’m going to have to experiment. That’s the one with the orange phase plug exit thingy? 

so 2-100w on that battery….. for Just lights….. if LED than yeah should be ok. 

What am awesome place….. I love it , looks amazing 


ive also been wanting to try that 18sound , I have the B&C 10NDL64-4 sealed with jbl2408H on a 800hz waveguide crossed at 1.8 LR2 
it’s pretty awesome but I know it can be better…. 

i want to get a good 1.4” or  2”exit horn to go to 500hz , any recommendations? 

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Battery as a power supply? 6 months 2 weeks ago #59809

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This is the Faital driver i will use:

faitalpro.com/en/products/HF_Drivers/pro...dex.php?id=502010110

500 Hz horn is huge.

Maybee this can be pushed so low:

www.eighteensound.it/en/products/horn/1-4/0/XT1464
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