Tantrumk 1200.1 owners...

[audioholic 5,000+ posts]

PG recommends an 80 amp fuse to the thing... that seems small for a 1500 watt amp at 14volts. What size fuse are you guys running to yours?

Second question, the owner's manual confuses me abit. I have two 1200.1's, if I run the signal output from the master amp to the slave amp, hooking the bass knob to the master amp should control both right?

And lastly do I really have to have the LP filter turned 'on' to use a bass knob (what the book says)? Im gonna be running an h701, I dont need nor want the lame *** processor built in to the amp. I want the amps to perform as simple gain blocks, all processing done at the 701, and leave the amp's filters off. But use of a bass knob is crucial. Seems a lousy way to design the thing, if Im understanding it correctly...?

TIA.

edit: and of course I have a typo in the title I cant edit //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

Click to read more...

 

[SPL140.2 5,000+ posts]

the bass nob should control both if connected to the master, yes should turn the LP filter on the master, dont fuse the amp, fuse to the size of the power wire.

 

[ultimate157 5,000+ posts]

If the amp has inboard fusing, I would fuse for the size wire you are running.

 

[audioholic 5,000+ posts]

Yes I know fuse for the wire, not the amp. I harp on this all the time actually. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif But the situation is, I have an AGU fuse distro block, can get fuses up to... 80 amp. So it will work for these amps if what PG says is true. But I find it hard to believe 80amp will be big enough. Wanting to know if I need to just go buy another distro block type, or get the 80amp AGU's and try it.

The wire will be 4ga, it will handle well above 80amps. The predicament is my distro block.

Thanks for the replies.

 

[ST33M 10+ year member]

Fuse ratings aren't always what to go by. My DB Drive 1200.1pt's have 80 amps of fusing and do over 1500 on 16volts at 1ohm. Been proven.

 

[audioholic 5,000+ posts]

80 amps at 16 volts is only 1280 watts... and that's if it were 100% efficient. So 1500 watts seems impossible, unless we are talking very short bursts with slo-blo fuses blah blah. Am I missing something?

To put it in perspective, my midbass amplifier (soundstream ref 644) is rated at 720 watts and SS also recommends an 80 amp fuse for this amplifier, which is half the rated output.

 

[ultimate157 5,000+ posts]

Fuse ratings aren't always what to go by. My DB Drive 1200.1pt's have 80 amps of fusing and do over 1500 on 16volts at 1ohm. Been proven.

Ohm's law is Ohm's law. 1500 / 16 = 93.x amps. That is 100% efficient. Assume 75% efficiency, you are drawing ~125A of current to produce 1500w.

 

[audioholic 5,000+ posts]

My thoughts exactly.

 

[Towncar 10+ year member]

Hmm not sure exactly on this one, as I havent used tantrum amps in my installs, only friends. That is about the only pg amp I havent used a bunch... post that question here. http://www.phoenixphorum.com

 

[mdillon 10+ year member]

And lastly do I really have to have the LP filter turned 'on' to use a bass knob (what the book says)? Im gonna be running an h701, I dont need nor want the lame *** processor built in to the amp. I want the amps to perform as simple gain blocks, all processing done at the 701, and leave the amp's filters off. But use of a bass knob is crucial. Seems a lousy way to design the thing, if Im understanding it correctly...?

does the filter go all the way down to 0hz? thats the closest way i can think of to get it working the way you want it to work.

 

[terra 5,000+ posts]

holy god..this is the first time ive ever seen audioholic ask a question

 

[SPL140.2 5,000+ posts]

Yes I know fuse for the wire, not the amp. I harp on this all the time actually. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif But the situation is, I have an AGU fuse distro block, can get fuses up to... 80 amp. So it will work for these amps if what PG says is true. But I find it hard to believe 80amp will be big enough. Wanting to know if I need to just go buy another distro block type, or get the 80amp AGU's and try it.
The wire will be 4ga, it will handle well above 80amps. The predicament is my distro block.

Thanks for the replies.

since you have the distro mine as well try it, cant hurt right //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif if it blows em get a bigger distro.

egg

 

[audioholic 5,000+ posts]

does the filter go all the way down to 0hz? thats the closest way i can think of to get it working the way you want it to work.

Well its a LP filter, so id want to set it higher, not lower it to 0hz where it would filter everything //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif ... but yes I know what you mean, and Ive already conceded myself to the fact that's exactly what Im gonna have to do. I just hate having another filter added to the chain unnecessarily, phase issues and all that. Anyway, thanks for the thought.

holy god..this is the first time ive ever seen audioholic ask a question

I never said I know everything, I just act like it. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

since you have the distro mine as well try it, cant hurt right //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif if it blows em get a bigger distro.

Appears that is gonna be my plan. I just know its gonna blow as soon as I crank the system to set the gains tho. Then I'll have to order new fuses, a new distro block, and rewire crap... bleh. lol