Please help me out with my new adire tumult setup

[mioduz]

Just built a new sub, and so far not impressed at all. Heres how it lays out
Adire Tumult 15" MK1
Dayton 500Watt Plate Amp
BOX: Ported (nearly 5 ft long port) little over 5 cubic feet
A friend designed the box and I just made it. So far im pretty unsatasified with the setup. It seams very weak. When I turn the gain up on the amp....it cuts out (led turns red and I have to cycle the power) Ive played with the EQ on it extensively, and the furthest I can have the Gain is at 50%. Is the amp shutting off because the woofer cant handle the load or becuase the amp can not take being up that high. This is the first sub I built so I am new to all this. Please let me know what to change if anything at all......

Thanks in advance
Chris

[mikee55]

Hello mioduz, I'm not an expert, but is your port really 5 foot in length?

I didn't know ports should be that long. I'm guessing that the cone is flapping? Maybe not, but 5 foot Whats it like with a rag shoved in the port, to temporarily close it?

Cheers Mike

[richie00boy]

What diameter is the port? 5 ft long is definitely many times too long no matter what diameter it is.

The amp is shutting down I suspect because you may be asking too much of it, or it's faulty. It's unlikely to be 500 real watts. That said, even 250 which it's likely to be is a lot of power for a large (efficient) box. Are you trying to fill a hall or something?

Also bear in mind that if your source level is quite high you won't be able to have the gain up much. The gain dial is not a simple 'power' dial.

[mikee55]

Welcome to diyAudio.com. I'd go with richie000boy, he knows loads more than me. He's helped me with my Linkwitz Transform sub, everything from measuring the driver's Thiele/Small parameters to cutting my box up and then he's helped with the electronics too.

But to be honest, everybody is here to help one another. I used to frequent the 'Audio Asylum', but these days, I like to reside here.

So hello to you.

Cheers Mike

[jonz]

I would have went with the 1000 watt amp....and check that port out ...way too big...


Check all your connections.

[roddyama]

The Tulmut MK1 has dual voice coils of 4ohm each. They can be wired in parallel or series. If you've wired them in parallel you would have a 2ohm load on the amp and that may explain the problem your having with the amp cutting out on you.

[richie00boy]

Also if the coils have been wired out of phase you would get very weak performance from the driver.