Amplifiers / Head Units / Processors / Electrical

Wanting to add to my existing alarm, thinking about adding perhaps two exterior sirens, current one is hurting. Also like the idea of having one or two piezo sirens inside the cabin. I have seen these refered to as pain generators. Any of you have input on particular brands which might stand above others in performance? I also wanted to know if adding the additional sirens and alarms will require any additional wiring aspects, I guess I mean can I just wire multiple sirens or will I need additional installation knowledge or products? Thanks for your help and input. Chop

I and a friend (electrical engineer) are going to build an amp for a custom install. Anyone here done this? We are in need of some manufacturing parts. We need to find a generic amp case, dc/dc boost converter 12v to 40v 1000watts, and misc parts like terminal blocks and such. We can sacrafice on old US amps for parts but would love to build it with all new stuff! BTW its going to be a 150watt per channel x5 amp for in car theater!

yeah, so today after work, i installed all my 0 gauge wiring from that 5 gauge that was in there before. i also went from the little 60 amp fuse under the hood to a 250 amp fuse. now before the switch, everything sounded good. nice stead, clean bass. but ever since i put in the 0 gauge wire, it gets louder, then softer and loud again and doesnt sound very clean. i messed with the setting on the amp to see if anything had changed and still got the same results. any ideas on what this could be? i also installed new RCA's if that matters.

Ok so heres the deal. I have one of these and i just ordered a 15 Fi BTL dual 1, everythin except the cooling. My question is if i were to get a second sub again dual 1 and wire them both to 2 ohm that would be one ohm at the amp right? Also if i were to strap another amp it would still equal one ohm at both amps right?

Hey everyone. Does anyone have a good used amp for sale? Mono block 2ohm between 500 & 1000 rms watts.

is it good to have less or more of it? and also why do most companies only post THD of 4 ohms, does it change with each load?

I'm planning on using some exotic wiring on being able to switch from 2ohm to 0.5ohm for competition via a switch so i do not have to rewire for an hour at every show. I see some copper made 80A relays. What i want to know is this, here is my scenario- Maximum burping current draw can be up to 85A AC. So i opted to use 2 80A relays per speaker in parallel for 160A of heat dissipation. Since Relays only use 10AWG quick disconnects, will quick disconnects be sufficient enough for this wiring? I plan on running modded inserts for 4awg wiring off each terminal of sub to a junction block. Then from there, 10awg to each relay pin, output to another junction box of 8…

Hey this is my first post, and off the bat let me say I am no audio genius nor am I close. I was refered here by Helotaxi, and I'm sure you guys can answer any questions I have. So that said, I am in the market for a Audio/Video head unit, that has Ipod control, mp3,cds, and all that good stuff. Someone on my car forums (SRTForums.com) was selling a Pioneer AVH 57000 I believe for 500$. It has the ipod adapter already, and the switch so you can watch while on the road. Anyways I was wondering if you guys could point me in the direction of a great AV unit for around that price, or if you have any tips or anything else. Thanks You. -Mykel

has anyone ever used a mono block to power coaxials? i currently have two pairs of planet audio torq 6.5" speakers, wanting to know if it'll work ok running them on a jl 250/1.

ok im a little said im some where in the range of 13.9 14.2while my car is running. and im 12.3 with the car off. i wanna be higher.. what must i do. 200 amp h/o alt 3 yellow tops. big 3 1 run of 0 gauge 3x300 amp circut breaker

What size are the screws that hold the mounting bracket on the amp?

i was looking into getting a new system i looked at this amp an re audio vlx 3de and running two subs. i know it would split the wattage between the subs but how do i wire the subs to this one amp? any help i know its a stupid question but it still confuses me.

I bought a usa-425 from Ryan, the amp looks great and everything, but when hooked up...... nothing. Im thinking its the preouts on my headunit. What is the best way to test this theory out? Besides hooking the amp up to another headunit? Also, if it is the preouts anyone know how these are fixed, if at all? Thanks

Only thing i can think of is shaving them down.. Then i saw another thread were it was lots of + runs and only 1 - run , which seems pointless if the power has to flow in and out.

I've got a P3002 that was missing the chrome cover when I bought it. I've searched all over, RFs site, watched ebay for about a month and never seen one. Anyone know where I could find one, or maybe point me in the right direction? Obviously its just cosmetic, but I'm in the process of a major rebuild, and am going to have my amps showcased, so it would be nice to have the chrome cover for it. Thanks for the help.

Look at all these Awesome old school items. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...5738660528&rd=1 And another little tidbit at an awesome price! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...mMakeTrack=true

I just purchased two Boston Acoustic G512-44 12"s for $400 shipped in a closeout sale from Crutchfield. I'm a link! Their specs are... RMS Power Range: 100-450w (225w per voice coil) Peak Power Range: 900w Impedance: 4 ohms Sensitivity: 94.3 dB at 2.83 volts, 87.2 dB at 1 volt Frequency Response: 20 - 350 Hz Min. sealed box volume: 1.00 cu. ft. Min. ported box volume: 2.00 cu. ft. Mounting depth: 7-3/8" I picked these up because they're CHEAP & require a small enclosure; (I want to keep max trunk space.) I've heard clips of them & they sound crisp & hit de…

I need to find out if i will need the big 3 or not with my setup. Here is what i have 1 12" kicker L7 750watts rms 2ohm dvc and am going to be purchasing a JBL GTO 1201.1 787watts at 4ohms. My car is a 95 ram 1500 and i think the alternator is 120amps will i need the big 3? information on the amp there are 3 40amp fuses so 120 amps is the most the amp will pull i was told just put that there maybe it will help you guys. THANKS! if you need more information i will try to post it up!

Im looking @ getting a amp for my SE and dont know which way to go. Im kinda on a budget but im open to all ideas. Want to feed it as close to 600 rms as i can. off topic: Hi to all, im new here

i plan on buying a sundown 2000D mono amplifier .. they will be powering 2 12 inch FI BLs and at 1 ohm. i have a stock alternator and battery and i wanna know how i should go about this. i know caps are bogus ive read the forums so i was thinking about replacing the stock battery with a kinetic one. would this be enough or would i need more ? i strained the alternator on my last car to the point were i cudnt start the car anymore i deffinitly dont want that happening again. all help is apreciated

I have an 07 Dodge Ram 3500 Mega Cab My head unit is: - Kenwood KDC-BT852HD. Which is 50W x 4 In my front doors I have: - Alpine Type R SPR-69 speakers. Which is RMS 100w & Peak 300w In the rear doors I have: - Alpine Type R SPR-60 which is RMS 100w & Peak 300w For my sub I have: - Alpine Type R SWR-12D2 which is RMS 1000w and Peak 3000w Now I need help on choosing an amp to power everything and I`d like to get the most out of all 4 speakers and sub. I have a list below of amps that will work with my system. Which two amps would be best for my set up? Thanks! Sub amps: - Nakamichi - PA-1500 1200 Watt RMS Mono Digital Bass 1 Ohm Amplifier - TXA-1000D - Cadence Cla…

I would like to ask this question as a thought experiment to determine if I am properly understanding the following relationships with wiring and power. Our speakers get AC out of our amps and our amps get DC from our power system. The DC power does not have frequency as it is a single flowing direct current and as such the flow of electrons through any wire have ZERO skin effect as skin effect is only applicable with frequency of transmission. What does play a part in power capacity however is the material of which the wiring is made of and how it is made. The total measured DC resistance of a cable of X size will be lower in copper material than it wi…

so i kinda wanted to find out if there was a way that i could tell around how much my amp is putting to my subs cause i dont have a dmm (yet).....so is there a way that i could show the specs of my sub amp to you guys and tell you how my wiring is??Like i said i was just hoping to kinda get an idea of how much my subs are getting now. the wires are L+ and R- some im guessin is bridged but im not sure how my subs are wired yet(i didnt do it) but im pretty sure they are at 4ohms....D4 subs btw and here is the amp again..... http://www.lafayetteradio.com/amplifiers/RSA150.2HC.htm

Im looking to do the Big 3 upgrade on my car but I really dont want to spend alot of money on 1/0 gauge wiring. Does anybody know of a good place to get it from cheap, or is anybody have some lying around they want to get rid of...a couple pieces here and there of like 4-5 feet is fine. let me know. I want to get prepared before my sub comes in on monday the 23rd.

Im trying to find an amp around 1500-2500w rms and around $250. Any suggestions on any other brand would be helpful. Thanks in advance Here are some amps i seen on ebay for around the price. Im not saying im going to buy these i just want ur input on the brand and price for it.( also if anyone sees some good deals for a Sundown or AQ let me know) Audiopipe AP 1800D http://www.ebay.com/itm/NEW-AUDIOPIPE-AP1800D-1800W-MONO-Car-Audio-Power-Amplifier-1800-Watt-/270972569696?pt=Car_Amplifiers&hash=item3f17394860#ht_3301wt_1396 Power Acoustik BAMF 5500( what do u guys think about P.A? for the price is this a good amp) http://www.ebay.com/itm/POWER-ACOUSTIK-GT1-4500D-CAR-A…