Ibanez Promethean P5110 speaker upgrade

I'll be interested to follow how it turns out if you do end up changing speakers ( I have the same amp).

 

I subscribed so I can see how this turns out. I really like my Promethean 110 combo, but I'm always down for making things better!

 

I'm curious to hear from the experts, too!

 

Free bump for my own curiosity....

...and just to make this bump more special, here's a narwhal....

 

Now THAT is a dang special bump! LOL!

 

I was hoping the Narwhal would bring good luck, but so far it hasn't worked...

 

Didn't see this thread.

Taking the space occupied by the port out of the gross box volume I'm getting about 17 liters. That's pretty small but I could be goofing up some metric conversions.

In any case, the deltalite is the clear winner, although, none of those should play that low in that tiny box. Again, may be screwing up some metric stuff.

You're on the right track, I'd just make sure you've calculated the volumes properly and see that you've got the port tuning reverse engineered right. You should be getting more of a lowmid bump unless that tuning is really low. The Faital is showing it's weakness of having a low Qts. That means it needs a bigger box to reach low, or in this case, won't reach as low in a small box. The bigger xmax over the original means a good deal more power can be applied. That, in combination with high spl will get you a lot more useable output from the combo.

See that you're removing the space occupied by the port and the driver inside the box and using the net internal volume as your box size, then adjust the port dimensions to 30.2 cm x 2.8 cm x 11.3 cm and see what tuning that gives you.

 

FWIW, typical 10" loaded bass cabs use around 1 cubic foot (28-30liters) per driver. IE: a 4 cubic foot, or 110-120 liter 410. Combo amps are made smaller for convenience. Yours seems really small and your curves look like they reach too deep for such a small box.

Again I could be goofing something up with the metric conversions.

 

Your curves also look too flat. In a little box, they shouldn't reach that low, and have a substantial bump somewhere around 100-150 hz.

 

Will33 has this pretty well covered, but another thing to look for is how the excursion works out.

Look at the cone excursion graph, and adjust the amount of signal it's getting until you're hitting xMax. You can look at the various SPL graphs from there.

As time permits I'll look at this tonight.

KO

 

+1

The maximum power setting in Alpha Pro will do that for you.

Also see your drivers are loaded up right and you're not missing important specs. If you have to, hit the drop down menu in the driver window so you can see the specs, double click on them, and edit them to match the driver data sheet.

That's all stuff you can do in Alpha Pro.

 

Deltalite is still the best bet. The combination of not having a bump in the lows along with a rising response in the mids may make it sound like not a whole lotta bass by comparison, but it still is. And it's xmax will allow you to drive it louder and/or turn the bass knob up a little bit if you want without getting distorted. It is just a 110, don't expect to shake the walls, but it will be a good improvement, and it's spl should make the combo in general play a little louder. You'll at least be able to turn it up more before fartout, both when stacked with your barefaced 112 and soloed.