underpowering subs

[kotabear]

I want to get 2 subs rated at 300W rms each. My amp only powers 75W per channel(2-channel amp). Will this be very bad underpowering the subs? and could it cause damage?

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[tigerf117 10+ year member]

It won't be very loud. You'd prob be better off getting a single sub and bridging it to that amp. Its not bad to underpower as long as you are not giving it a clipped signal (having the settings off/gain too high etc). What does that amp bridge at? I'd assume around 150wrms @4o

 

[WildSebring 10+ year member]

Well....if your going to buy 2 300w RMS subwoofers for 600 RMS, why even put a 75x2 2 channel on them?//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif Why don't you buy a small mono block amplifier..maybe a Kicker 750.1 or a Diamond D600.1 or something along those lines..

If you do...are you going to bridge it? And whats it do bridged? If not, 75 watts wont be enough....IMHO..

 

[1rockford1 5,000+ posts]

It won't be very loud. You'd prob be better off getting a single sub and bridging it to that amp. Its not bad to underpower as long as you are not giving it a clipped signal (having the settings off/gain too high etc). What does that amp bridge at? I'd assume around 150wrms @4o

x2

 

[Rashaddd 5,000+ posts]

underpowering subs is probably the fastest way to kill them. Don't do it..its the same reason you should never EVER turn your volume down.

 

[oldschool4me 10+ year member]

your amp probably does about 150x2 @2 ohms or 300x1@4. i would get either like maybe 1 cvr dual 2 ohm wired to 4 ohms and bridge the amp to it or get a pair of lower power decent dual 4 ohm subs like some mtx 4500's, alpine type s, memphis pr's etc. and run it in stereo at 2 ohms.

 

[01 S 10 10+ year member]

you need a more powerful amp, what subs are you using?

 

[oldschool4me 10+ year member]

underpowering subs is probably the fastest way to kill them. Don't do it..its the same reason you should never EVER turn your volume down.

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif are you being serious?

 

[Rashaddd 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif are you being serious?

Yes, I actually just broke my volume knob off with it at max volume so I know no accidents will happen with other people in the car turning it down without realizing the consequences of their actions

 

[oldschool4me 10+ year member]

Yes, I actually just broke my volume knob off with it at max volume so I know no accidents will happen with other people in the car turning it down without realizing the consequences of their actions

//content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif

op as long as you dont start clipping them you will be fine. i have ran many subs underpowered and ran them for years that way. if you have a good amp then you can get by with it until you can upgrade or if you just want a lil bump to your system go along the lines of what i mentioned before. as long as you have a decent amp. what amp is it that you have?

 

[n2audio 5,000+ posts]

even fully clipped a 75w amp isn't capable of damaging a 300w sub.

you won't get much output, but it's not going to hurt anything.

Fwiw - there are plenty of 500-600w monoblocks on ebay for

 

[Alex JB 10+ year member]

OP, what's you aim here?

If you are looking to build a nice box and load it with some subs that can handle much more later, then do just that... buy & build the enclusure/subs that you want and just feed them the power you have, untill you upgrade on power.

If you intend to build this setup and leave it that way, why not use a single 8 or 10 that's designed for 200W RMS or so and feed it your 75 x 2 bridged to 1. you should still get some bump and you can keep most of your trunk space! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[cleansoundzz 10+ year member]

I ran 2 solobarics off of a JL Audio 500/1 for 5 years and they never blew. They were severely underpowered. Your system will not hit as hard though. Are you looking more for SQ or SPL?

 

[oldschool4me 10+ year member]

OP, what's you aim here?
If you are looking to build a nice box and load it with some subs that can handle much more later, then do just that... buy & build the enclusure/subs that you want and just feed them the power you have, untill you upgrade on power.

If you intend to build this setup and leave it that way, why not use a single 8 or 10 that's designed for 200W RMS or so and feed it your 75 x 2 bridged to 1. you should still get some bump and you can keep most of your trunk space! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

thats what i was saying, he should have about 300w to work with so run one sub similar to a cvr or use two decent lower powered subs if he dont plan to upgrade. he can always add another cvr later when he upgrades the amp.

 

[muskyhunter567 10+ year member]

even fully clipped a 75w amp isn't capable of damaging a 300w sub.
you won't get much output, but it's not going to hurt anything.

Fwiw - there are plenty of 500-600w monoblocks on ebay for

You would be surprised what you can do with 75-100 watts ish