Shark stereo stand-by time?

[mick56]

Morning, i am just about to buy a Shark shkmsm2050k stereo for my bike, anyone know how long i can use a 100 watt amp for while i am parked up, before the battery gives up and i am left stranded. Cheers, Mick.

[Big Dog]

That would have more to do with your source battery than the particular model of amp. If your wanting to run it parked up an auxiliary battery would be the ideal. On an auto switch so that starting battery is isolated when the motor is not running.
Alternatively if your battery is not very generous in capacity to start with you could put a higher capacity battery.

How long before you are left stranded if using main/ starter batter is pretty much trial and error.


Stupid phone / Tapatalk, apologies in advance.

[NinjaNanna]

Depends on how loud you have it.

100W is at maximum volume and equates to approx. 8 amp.
Batteries are measured in AMP Hours (AH) - its more technical than this but a 16AH would run the amp for 2hrs before it was completely drained.
Batteries should NEVER be completely drained and the recommended discharge is about 50% so you are now back to 1hr (but the remaining charge I wouldn't expect to start your bike)

Personally if your battery is healthy I'd expect you to be able to run it at 50% volume for 1/2 hr and still be able to start the bike. You'd need to run the bike for another 1/2hr to be confident that the battery had recharged.

Even if I'm wrong I'd still expect there to be enough charge left in the battery to not hinder push starting it I it is too low to fire.



EDIT.... just looked up the website 100W is the marketing PMPO figure, real world value is quoted as 50W RMS (equates to 4 AH)

If it was me I'd use the trial and error approach - start at 30min but expect to get to 1hr or maybe even 1.5hrs

These little things are a bargain at USD70 at the moment - I must resist the urge to impulse buy

[The Pastor]

Depends on how loud you have it.

100W is at maximum volume and equates to approx. 8 amp.
Batteries are measured in AMP Hours (AH) - its more technical than this but a 16AH would run the amp for 2hrs before it was completely drained.
Batteries should NEVER be completely drained and the recommended discharge is about 50% so you are now back to 1hr (but the remaining charge I wouldn't expect to start your bike)

Personally if your battery is healthy I'd expect you to be able to run it at 50% volume for 1/2 hr and still be able to start the bike. You'd need to run the bike for another 1/2hr to be confident that the battery had recharged.

Even if I'm wrong I'd still expect there to be enough charge left in the battery to not hinder push starting it I it is too low to fire.



EDIT.... just looked up the website 100W is the marketing PMPO figure, real world value is quoted as 50W RMS (equates to 4 AH)

If it was me I'd use the trial and error approach - start at 30min but expect to get to 1hr or maybe even 1.5hrs

These little things are a bargain at USD70 at the moment - I must resist the urge to impulse buy

I bought a lil no name amp off ebay for $30 and some speakers from nz (marine rated) for $25. Its really loud and i can easily listen to music at 100km/hr+ (i have a windscreen tho). Through on a bluetooth iphone controller for $20 (already lost mine haha) and you can have a handlebar or dash mouted remote that changes songs, pauses and adjust volume for under $100.

Music quality isnt great, (its cheap shit gear) but you cant hear the distortion much when you are riding anyway.

[Dave-]

Batteries should NEVER be completely drained and the recommended discharge is about 50% so you are now back to 1hr (but the remaining charge I wouldn't expect to start your bike)


I wouldn't discharge a lead-acid below 80% unless it was a deep cycle.

Check out these batteries for your auxiliary: http://www.kiwibiker.co.nz/forums/showthread.php/159817-Ultrabatt-lithium-batteries

Smallest and lightest form factor means you can pump more of them together, because they're lithium iron you can discharge them down to ~25% before they'll get damaged.

[avgas]

just looked up the website 100W is the marketing PMPO figure, real world value is quoted as 50W RMS (equates to 4 AH)
Rated is even lower about 15-30w. So yeah 4 hours easy......but the problem is you don't know how charged your battery is (unless you have a battery gauge).

[Akzle]

if you have enough room for a fkn stereo, you have enough for a dual battery isolating rig.

[pritch]

Having read this I think that if I feel the need for music while I ride, or while parked, I'll use the iPod.