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Old 26th March 2014, 02:34 PM   #1
andysam is offline andysam  United States
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Default Regulated power necessary, or just hook up to batteries?

http://wholesale.parts-express.com/2...board--320-301

Can I simply hook two batteries in series (24v) to this amp? The manual says that is needs 6amp regulated power, but when I hook the batteries up directly, it plays and sounds great. Will running it off of batteries unregulated damage the amp?


If I hook up 2 12v 2.5ah batteries to this amp, what will the the number of amps the batteries will send to the unit? What about if I do 2 7ah batteries?
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Old 26th March 2014, 10:40 PM   #2
andysam is offline andysam  United States
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http://www.power-sonic.com/images/po..._11_Feb_21.pdf

My question is for the power sonic batteries. If I wire two of these is series for 24 volts, how many amps can they deliver?
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Old 28th March 2014, 08:39 PM   #3
andysam is offline andysam  United States
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Does anyone know? Please help, I'm new at this.
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Old 28th March 2014, 08:48 PM   #4
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For two identical batteries in series, the voltage is doubled. The maximum current will be the same as for a single battery.
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Old 28th March 2014, 08:57 PM   #5
peufeu is offline peufeu  France
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the battery datasheet has all the info...
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Old 28th March 2014, 09:49 PM   #6
andysam is offline andysam  United States
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peufeu, can you help me decipher the datasheet? I am new at this, and not sure what it all means. If the amp needs 6amps, will this battery supply 6amps even when the amp is at full power? (the boom box had some cutting out when I turned it up all the way)
Here is some info from the data sheet.

Energy Density (20-hr. rate) ................................. 1.54 W-h/in3 (94.16 W-h/l)
Specifi c Energy (20-hr. rate) ............................... 17.14 W-h/lb (37.79 W-h/kg)
Internal Resistance (approx.) ................................ 40 milliohms
Max Discharge Current (7 Min.) ............................. 15.0 amperes
Max Short-Duration Discharge Current (10 Sec.) ...... 50.0 amperes
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Old 28th March 2014, 10:10 PM   #7
peufeu is offline peufeu  France
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It says the battery will give 9 amps for 15 minutes, or 2.85A for 1 hour, etc.

The amplifier's max 6A current is probably only for full power.

Since your amp will not be using the maximum current all the time it should be fine.

You should add something to monitor the voltage as discharging lead acid batteries too much will shorten their life very very quick.

If you want to party all night with this you'll need larger batteries, though.
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Old 28th March 2014, 10:31 PM   #8
andysam is offline andysam  United States
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Thanks peufeu!

You should add something to monitor the voltage as discharging lead acid batteries too much will shorten their life very very quick.

What is the minimum voltage I would want the SLA batteries to get down to each time to keep their life span long?
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Old 29th March 2014, 06:41 AM   #9
peufeu is offline peufeu  France
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Absorbent Glass Mat (AGM) Battery Information - Battery University
These batteries can withstand deeper discharge than normal lead batteries, so, good choice.

Look at "Life Characteristics in Cyclic Use" figure in page 2 of datasheet, it gives number of cycles versus discharge depth.
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