does an amp suck the battery of a DAP? if so, why?

[rob1031]

Dont amps have their own battery? why would the amp suck out more battery of the mp3 player?

i heard that having an amp decreases play time... thats why im curious

 

[uncle b]

You know, now that I think about that, there may be some validity to that statement. I found I run my DAP at a high volume for use with my SuperMacro amp, thus draining more battery, I'm sure. That's one thing I can think of...

 

[hawkfire]

Hello,

the use of the line out along with the volume level and dedicated circuitry would be the culprit as to faster battery drain than normal.

In otherwards, the player is consuming more energy with the line out than with the headphone out.

Thats my take on the matter as both have seperate power sources and an amp cannot drain a sources power supply because of this by physical design.

Unless the amp in question is designed to leech power from the source but that would open up an entirely new can of worms and to date, I havent seen an amp designed to do that.

 

[Fish Tank X]

As far as I know, a dedicated line out will not leech power, as they're designed to be extremley high voltage, but they don't drive a 'Load', thus they shouldn't consume much energy. They merely present a signal that needs to be amplified. But the power to drive the phones is provided by the amp, not the source. On the other hand, a headphone out circuit is designed to drive headphones, possibly with a high load.

 

[Lisa]

I find that the use of an amp with my PCDP gives me better batterylife....

 

[st5150]

Quote:

Originally Posted by Lisa I find that the use of an amp with my PCDP gives me better batterylife....

There is a lot of fluff in this thread, but what Lisa said is true. The input impedence of an amp is much higher than the impedance of headphones. The load headphones place on your DAP is much higher than the load (could be virtually no load depending on the amp design) the amp places on your DAP.

 

[Chef Medeski]

Quote:

Originally Posted by st5150 There is a lot of fluff in this thread, but what Lisa said is true. The input impedence of an amp is much higher than the impedance of headphones. The load headphones place on your DAP is much higher than the load (could be virtually no load depending on the amp design) the amp places on your DAP.

I have to agree with the both of them. It makes the most sense. Plus just because of the greater voltage and resistance of line-out does not mean it consumes more electricity. Merely the amps are reduced. Thus, amplification will help increase that by utilizing an external power supply.

No fluff, just Ohm's law people.