sub + amp compatibility

[Unregistered]

I have a question for all you sound experts out there! I have an old Punch series 1-158 15" sub that I want to amplify. RMS on this sub is 150w and peak 300w with ohms tested at 7.3ohms or 8. One of the sales guys at my local audio store is trying to sell me a db drive A275; 2-channel (2 x 75w @ 4ohms; 2 x 150w @ 2 ohms; 1 x 350w @ 4 ohms bridged) amplifer. Side note: I've never heard of db drive have any of you? FYI: Their website is http://www.dbdrive.net.

Anyway, my question is with an RMS of 150w can I amplify this woofer with this amp. They guy at the store said I would probably not get all 350w bridged. So how do I know how much I'll be getting bridged. I like the sound of them briged! Something else to consider is that while I bust this speaker up I have another one.

Don't have enough room on my truck for both! I eventually want to move up to an 8" bazooka or Punch tube. But I don't have that kinda dough. For now I have these two and will use one at a time for spaces sake. When I destroy these two and get the money I'll move up. What I also like about the db drive amp is that it comes a remote base control to put under the dash! Cool! Sorry for the big post!

Could use any help!

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[jimmyslide 10+ year member]

DB Drive are overrated in my opinion. You likely won't get all the bridged power since it is overrated. You can run the sub fine, but just remember to control the gain. Don't turn it up all the way if the sub is muffled or distorted. You should be fine as long as you control the power reasonably.

Some higher end subs can utilize their peak power almost all the time. example kicker

Yours isn't high end so don't attempt to put 300 watts into it. Keep the power turned down till it sound jsut right.

 

[mykeys 10+ year member]

If the amp were rated for 350 watts bridged and you double the impedance you are decreasing the power by half..Power and resistance are relative in most cases where amps are invoved..JL being the exception being a continuous output over all resistance..at least I think it was JL.

Mike