Amplifiers / Head Units / Processors / Electrical

any difference between the two? voice coils parallel/speakers series or voice coils series/speakers parallel? (2dvc4ohm subs to a 4ohm load) Thanks

i just installed my rf t8004 and rf t40001bd. For some reason the t40001bd is getting hot even when i have the sub off. I am getting engine noise in both my speakers and subs. Today I disconnected my pos terminal and then while I was driving my mids and highs went crazy on me. Out of no where they started cutting out and started crackling like they were blown and my right mid was blasting a low frequency like a sub even when i turned the music to 0. Now the right mid will only work on and off and now the left mid is doing the same thing. They are barely putting out any sound even at high volumes. Sometimes they will sound fine and loud and sometimes they put out nothing a…

Ok, I have never owned an amp w/o on-board fuses. I understand that fuses are necessary, but I am a bit confused about just how they are installed and WHY they are necessary. I'll probably purchase an amp kit that comes with an in-line fuse. I understand that this is to protect the battery in the event of...hell idk, I just know it's to keep shit from catching on fire. Now further down the line, the two amps I have have on-board fuses to protect themselves in the event that they should draw more current than they need/can handle. (Not quite sure about that either. I know that fuses usually pop when too much juice passes through them.) Now...I've been avoiding this by limi…

Here's what i have Excessive Amperage 180 amp alt. 110 at idle big three plus more doen in 1/0 ga optima yellow 19 feet 1/0 ga to the trunk 5 inches of 1/0 from amp to ground MTX thunder elite 1501d during testing yesterday i found that on the voltmeter mounted in the dash (aftermarket) it would drop down to 12.3 and lower during a romp on the new xcon. i haven't tested at the amp yet but shouldn't the volt meter be a good indication of the drop in the rear? the alt tested out good the last time we had it benchtested by excessive. any clues or ideas?

I have a Hifonics Brutis 1208d amp and i lost one of my set screws for the power and ground terminals, does anyone know where i can get a new one? I've tried hardware store and all i can find are set screw that look perfect but I can't find the right size. Its metric and 6mm is too small and 8 is too big, and i can't find a 7.

I have done some searching around and have not found out what I'm looking for, I understand the calculation for volts on a DMM to set the gains properly. In my particular case, I have (2) Fi SSD's (800rms/each) and a Sundown SAE-1200vD2 (1200rms). Now what I have been seeing is everyone says to take the lesser of the two then do your calculations for proper volts on the DMM. So, would I use 1200 from the amp or 800 from (1) sub or 1600 for both subs?? Im guessing since my subs can handle 1600 combined, I would then use the 1200 from the amp, which would be 34.64v (dual 1 ohm subs and wired that way). Please clarify for me. Next question, I have several wiring diagrams for…

I picked up a DMM the other day and have been reading up on setting my amp gains. I came across this the other day: So my question is, is it still safer to set your gains with a DMM than by ear?

I plan on buying an active compatible HU, but was wondering how setting crossover points on an HU works? If I am using external amplifiers, with crossover settings, do the settings on the HU ignore those, and just use the settings programed in the HU? Or would I have to set crossover settings on the amp which are equal to those on the HU? Specifically I will be running a US Amps AX-5600. Help is much appreciated. This will be my first active setup.

So tonite I set my gain and ssf according to the thread on here. Only questions are, when getting rms for 2 zcon's, do I add both together, or just what amp says. Amp is a saz2500d. 1 ohm says 2500 rms. square root is 50. Set amp output to 50 vac. Then took 50*.707=35.35. Turned ssf up till voltage dropped to 35vac. Questions are, is that correct? Or do I then readjust gain back up to 50?

Okay got the fluke oscilloscope hooked up to the amp..... waves show perfect curves @ 40hz. the remote bass knob clipping light turns on at a certain point, yet the oscilloscope shows a nice perfect curve. has anyone dealt with this amp before and had this issue?

Hey guys quick question: I understand this: Voltage of the output = sqrt(RMS Power X impedance of the speaker) Example Say the amp provides 100WRMS into a 4 ohm speaker: Voltage = sqrt(100W X 4 ohms) Voltage = sqrt(400W*ohms) Voltage = 20V So I have a 1500W amp and two dual 1 SSD12s. Would it be? Voltage = sqrt(1500W x 1 ohm) Voltage = sqrt(1500W*ohms) Voltage = 38.7V Should I use 30HZ, 50HZ, or 100HZ tone?

Here is my problem. I know the out put values on the amp @ 2ohm(115wrms) and 4ohm(75wrms),what I don't know is the output @ 3ohm which is waht my comps are. Should I assume a midpoint? And effectivly gain down to say 85w(100wrms 3ways and 90wrms 2ways)meaning figure voltage for 85w @ 3ohms and set accordingly. Or do I just need to get an o-scope and do it on a bench?

when you set your gain with a dmm it says take the amps rms and multiply it by the impedance of the sub. so say you have a 2 ohm dvc sub and you wire it down to a 1 ohm load. do you take 1 ohm or 2 ohms and multiply it by your amps rms then sqrt it?

Ok so with a sundown saz1200d its 12 volt ratting is 1200+ watts an something like 1400+ at 14 volt .. so when setting the gain to be some where safe would it be better to set it with the car running? I have the big 3 done an a hc1400 up front an a hc800 in the back...

It's been a while since I've used my o-scope and I've read alot on how to set the amp gains but while i've been trying to see the clipping I've had some problems being able see where clipping begins on the h/u. From what i seen it was at 53 on an alpine deh-4000ub as i was setting the gain i barely touched the gain knob and it was in clipping and i dont want to have my h/u at 53 just to get bass. im using a bk precision 2120. i'm running a re -sx 12 in a 35hz box connected to an AQ1200d. can i get some suggestions on the way to set these properly fellas?

hey everyone, so today i went to harbor freight tools, got a DMM on sale for 3.00 dollars, the name brand was cen-tech, heres the link CEN-TECH MULIMETER so anyways i got home, logged on, looked on the stickies for the Setting gain with DMM tut and i done everything i was suppose to, minimized HU Settings,bass,treble,etc, used a 50 hz tone 0 db, and when i connected the DMM to the speaker output with no load, i had to set the gain almost at 3/4 to get my voltage i have a hifonics bxi 1200 watt amp at 1 ohm load on 2 12" pioneer 308D4 rated at 400 rms per sub HU is kenwood MPC205, 2 volts at sub pre-out 1200 wrms at 1 ohm load so 34.64 Volts is what im striving for on my d…

Alright, read thru the pinned topic for this, seems easy enough..but im doing something wrong.. im usin an old school volt meter but it has "ACV 200 and ACV 500" .. i set it to ACV 200 (AC volts)..the amp is a Sundown SAZ1500D running at 1 ohm so... voltage = sqrt (1500 * 1) voltage = 38.72 ish.. can someone verify that please... so i pop in the 50hz test tone, loud off, bass boost off..volume to 3/4 and I stick the voltmeter to the outputs of the amp.. it tells me 2.8 and up to 5.something at full gain.. something is wrong just not sure what. appreciate any help.

ive been into car audio for three years mostly kicker but i decided to upgrade i have a rd1750.1 and a sundown nightshade v1 d1 15 i am new to hi end car audio so can someone tell me what voltage my output should be to have my gain set correctly at 2 ohms which is 840 watts and at point five which is 2225 watts please would appreciate the help dont wanna clip my new set up

Hey guys, I have a dxz925 clarion deck and wanted to know about the filter on the deck and my amp. Is it all by ear? I currently have the deck lp filter off and the amp around 60-70hz? Hard to tell with the generic dial on the amp. Is it better to have both on? I have a choice of 50, 80, and 120hz on the deck, and 50hz on up on the amp. I notice the subs sound weird when I turn the amp xo up to much, don't know how to describe the sound, but I'm sure you guys know what I'm talking about. So would you recommend me trying? thanks. btw the gains are about 1/2 way up. sealed box, so ssf is off.

What should I set my amp to get the best quality I have Hifonics Brutus BXi1208D I also have 2 RE SE12 Dual4

Hey guys, I have a couple of questions in regard to properly setting the gains for my new SSA Xcon 18. I have a Pioneer AVH P4300DVD head unit with a Rockford T1500.bdCP amplifier, and the Xcon in a custom 6.5 cubes ported box tuned to 33hz. I am using a DMM to set the gains and have read that the amp gains are supposed to be set while all the HU EQ settings are flat (or on 0), the volume on 3/4 the max setting, and a 50hz test tone in the cd player. I am not sure how right that is so I decided to ask. My questions is what is the best way adjust the sub "bass boost" and "output level" settings on the HU? Do I put them on my desired point before adjusting the sub amp gains…

Hey, I was running wires etc today and I decided to just make sure everything worked alright before I got my box built. So the amp turns on and appears to be fine (it isnt in protect mode) but the subs only hiss. It seems like they are moving a little bit but I dont hear any sound except for white noise. My rca's probably arent the best *rockford fosgates* but they should work and for the ground I sanded a patch in the trunk and screwed it down. The amps manual says that white noise is caused by the amps settings but I turned them all in different ways and still nothing. btw I have a hifonics brutus 1606d and 2 12" soundsplinter rlps and a pioneer premier 6700 any ideas?

i have stock electrical, just one 4 gauge run to my alpine pdx 1.600 amp (600rms, 730 peak), but my gauges/instruments dim down to about 50% and my headlights dim terribly. will the big three in 1/0 or 2 gauge solve this problem? i have a 2003 vw passat, im pretty sure my alt does 90 amps..

Well, instead of posting all this in the build log, i'll just post it here because i have a question anyways. I have\had 2 of these amps strapped together. When i first strapped them up, after several minutes, the slave went up in smoke. It was concluded that the input stage on the amp got damaged. There was no audio coming through either amp when i first tried using these. I tried using just the master. No signal at the time until i unplugged the rcas from the HU then plugged em back in... been working ever since, odd but no probs now. Got the slave amp back in and i did not have any subs hooked up to em when i had em strapped again but the slave amp went up in smoke …

hey i don't understand why visions in my town when running the speaker wire to the sub used 16 gauge and twirled it around it self so when i unwound it there was probably 7-9 ft just going to the box does twisting the wire do anything or are they just trying to charge for more wire ? I'm redoing it with 12 gauge it's only for a 600rms alpine amp so 12 gauge i figure is plenty