amp debacle.

[jagpunk]

I'll start by saying no matter how much people try to tell me relationships of ohms and wattage, I still have questions about it...


Ok, I have an ampeg svt-350h bass amp.

It's 350 watts at 4 ohms.

I'm considering hooking up:

410 cab
800 rms
1600 peak
8ohms
40-5000hz
96db

AND (from the 410)

15" cab
300 rms
600 peak
8ohms
30-4500hz
96db.



Is this gonna be problematic, as far wattage? It kinda seems so to me. How loud would it be approx?

Is 5khz tonally acceptable in the bass-playing realm?

The only reason I'm considering is because we would be talking about $310 for the whole package. Or should I instead keep my beat up ampeg 410hlf that I bought for $350?

 

[pchorman]

the units missing before rms are watts.

the 8 ohm cabinets represent a (safe) electrical mismatch. this type of mismatch is considered safe because less current will be drained from your amp with 8 ohms than with 4 ohms, not because the cabinets are necessarily safe with the wattage ratings. however...

maximum power transfer will not be achieved with this mismatch. fewer than 350 watts will be pumped into your speaker cabinets.

computing exactly how much power, at worst, will be delivered requires some information about your amp which you don't have, such as the internal resistance of its final amplifier stage or the source voltage for a given load.

my guess is that you will not be able to overload either cabinet at maximum volume.

most bass frequencies are comfortably below 4500 - 5000 Hz.

 

[LocusLarsen]

What I have come to learn is that if the Ohm matches the amp and the speaker you are set...Assuming it sounds good to you.

People are always using 35 watt greenbacks with a 100 watt Marshall head. Granted its a guitar and not a bass, but...

 

[Track Rat]

Both cabinets connected in parallel will represent a total 4 ohm load so the amp will see just what it wants to see on that respect.

 

[M.Brane]

With a solid state amp the load does not matter as long as you don't go beyond where the amp is designed to run. If the amp is rated at 4 ohms minimum, you can't go below that. Two 8 ohm cabs in paralell = 4 ohms. The higher the load the less power the amp will produce. As long as the speakers are relatively efficient you shouldn't have a volume problem.

If it's a tube amp do not mismatch the impedence, unless you like to give large amounts of money to your local amp tech.

I've always preffered the sound of 410 or 810 cabs for bass, especially when playing loud & aggresive music. The 15's & 18's are just too sloppy IMO and the subsonics cause problems on stage.