Re: Modded Mtx thunder 1501 D please help
hopefully Scottie can come in here, but since i have one of these, maybe i can offer a little help.
The EQ setting is like a bass boost, i would turn it all the way down if at all possible. Its centered at like 45hz or something, and will just color your bass. But, your personal tastes may dictate using it.
The frequency setting is the low pass crossover. Not sure if the amp has markings, but after some searching, i found that the range is 40hz to 200hz. This means that with the dial straight up, the x-over point is approximately120hz which is too high IMO. You'll want the x-over point somewhere around 60-80hz, depending on how your mids are x-ed. You may have to experiment with this setting to get it to your tastes, but start somewhere around a quarter turn up from the lowest setting and work from there.
don't worry about the phase until everything else is set. at that point, you can try switching it to see if there is an audible difference. really not that important on a daily set up, the phase is mostly for use when strapping
first off, what kind of deck do you have? i run an Alpine, so i'm not sure how others behave, but i always adjust the gains with the subwoofer level at its highest, so i get the highest signal i can to the amp, and also so there is no chance for someone to mess with the settings on my deck and overdrive the subs. this method works well IMO, because you have a line you can't cross, and you have the maximum amount of adjustability downward should you want the bass level lower at certain times. as far as the gain goes, there are all sorts of fancy methods for setting it. since you have a sub that will take the power, i'd go the generic route. MAKE SURE THE 1501 IS OFF!!! Unplug the RCA's from it, and find at what volume you highs start to cut out. Now, turn the deck off, plug RCA's back into the 1501, turn the deck back on and adjust the volume to the level you just found for the highs, and adjust the gain til the sub blends well with your highs. It will let you know if its struggling at any point.
note: if you adjust the gains to rock or some other material that doesn't have subsonics in it, you will need to be careful when playing unknown songs that may send the woofer below tuning. a certain gain setting that is fine for rock may overdrive your woofer when presented with material below the tuning frequency of your box.
Last edited by SixthFloorFreak; 03-24-2005 at 10:22 AM.
1998 Camaro Z28 - M6, !CAGS, H/C, headers, Pro 5.0, LCA's
1995 Accord Wagon - 9835, iPod, Pioneer Premier PRS-X720, 2 Incriminator Audio 187's