Hey guys i dont know much about audio but i am wondering whats the best 4 channel amp to power 2 sst4.0 tarantula up front and a 600w sub at the rear? I dont wanna spend a fortune either cheers guys

You'll need more than a 4 channel to power the 2 speakers and a 600w sub (assuming it's 600rms) or is it a low powered sub? If it's 600rms, something cheap like a Response monoblock are pretty good bang for buck... $349 (Jaycar) Even the Response 4 channel can be bridged... (4*100rms) Power / channel @ 4ohm 14.4V: 130WRMS x 4 Power / channel @ 2ohm 14.4V: 190WRMS x 4 Power / bridged @ 4ohm 14.4V: 380WRMS x 2 $299 from Jaycar

Nar its one of them real cheap clarion subs, its 600w max power so more like 200rms

You'll also find that those speakers you are after are 3ohm resistance... You'll have to find a specific amp that caters for that... Majority of amps over here are 1/2/4 ohm

Oh really, so they wont work? Thanks for the info mate.

I don't know if there is such thing as a 3 ohm amp, however: The resistance has nothing to do with whether the amp will drive it or not. cars Amps are generally designed for 4ohm loads.(and sometimes 2 or 1 ohm). If a manufacturer gives power ratings for loads of 2ohms (and sometimes 1ohm in the case of monoblock amps), it means that particular amp can run stable at 2ohms (2ohms is half the load of 4ohms - which means the speaker(s) - which make up that 2ohm resistance - will be drawing a lot more power from the amp than they would normally do at 4 ohms - if they draw too much it could burn the amp out - but more often it will be the speakers that blow because they are drawing too much current through them. How much resistance you have one any given channel all depends how you wire your speakers. (and how many you wire to each channel). Say you have 2 speakers, both with 3 ohm resistance, and one amp, with 2 channels normally run at 4ohms. If you wire one speaker to one of the amp channels, and the other speaker to the other channel, the total resistance will be 3ohms per channel. If you wired both speakers in Series to one channel, the total resistance will be (resistance in series = just add the resistances together - 3+3= 6 ohms. (meaning the speakers will be drawing half as much current through them - and you will find that the volume drops as well, as opposed to using one speaker per channel.) If you wired both speakers in Parallel to one channel, the formula for resistance in Parallel is: 1/total resistance = (1/resistance1) + (1/resistance2) .... 1/T = (1/3) + (1/3).... 1/T = 2/3 so T = 1 divided by 2/3 T = 1.5 Total resistance would be 1.5ohms, so the speakers will be drawing twice as much current through them (at full power). Most car speakers as far as I know are 4 ohms (these are the first 3ohm ones I've heard of). But you will see with subwoofers, some are available with a 4ohm single voice coil, some with a 2ohm single voice coil, some with 2x 4ohm voice coils, some with 2x 2ohm voice coils. This is so that you can have more of a choice of how many subs you wish to run and how many amps you want (or can afford!) to run. Eg 4x 4ohm SVC (single voice coil) all wired in parallel will create a 1ohm load (so if you had a grunty monoblock amp you could run those 4 speakers all on the same amp). With the subs that have DVC (Dual Voice Coils), you can wire each coil independently of each other (so those subs have 2 pairs of connections on them). Eg if you had a sub with Dual 2ohm voice coils, you could wire them in series and you would have a 4ohm sub (and connect 2 of those subs in parallel so you get a 2ohm load which you could use on a 2ohm-stable amp), or you could wire them in parallel and you would have a 1ohm sub (and join 2 of these in series for a 2ohm load or 4 in series for a 4ohm load). Anyway, for you Zac, if you got a 2 channel amp which was 4 ohm stable (most are), and run one 3ohm speaker per channel, they will be drawing a bit more current through themselves than a set of 4ohm speakers, it should be fine, just as long as you don't have your volume on max the whole time. And remember that a 4ohm speaker driven by a 4 ohm-stable amp still has the ability to burn itself out as well –you also have to take into account the power output of the amp versus the power capability of the speaker - just gotta watch how far you turn that volume knob – Distortion is Not Cool!

Thanks! ^^^^^^^ i dont like my music real loud anyway. madrx3boy what amp do you recommend? NOMAD said this http://cgi.ebay.com.au/Pioneer-GM-64...item5ad7b28717 (http://cgi.ebay.com.au/Pioneer-GM-6400F-4-3-2-Channel-Bridgeable-Car-Amplifier-/390165858071?cmd=ViewItem&pt=AU_Car_Parts_Accessories&hash=item5ad7b28717) Any good? Will that run the sst4.0s and a cheap clarion sub? And i will stick some 6x9s at the rear and run them off the head unit? Thats what ive been recommended. Cheers guys! ---------- Post added 26-05-10 at 14:49 ---------- also my headunit has 1 pre out, that means i can hook it up to a amp cant i? i already have all the wires. Some original photos have not been recovered yet.

Quote: Originally Posted by zac320 [View Post] Thanks! ^^^^^^^ i dont like my music real loud anyway. madrx3boy what amp do you recommend? NOMAD said this http://cgi.ebay.com.au/Pioneer-GM-64...item5ad7b28717 (http://cgi.ebay.com.au/Pioneer-GM-6400F-4-3-2-Channel-Bridgeable-Car-Amplifier-/390165858071?cmd=ViewItem&pt=AU_Car_Parts_Accessories&hash=item5ad7b28717) Any good? Will that run the sst4.0s and a cheap clarion sub? And i will stick some 6x9s at the rear and run them off the head unit? Thats what ive been recommended. Cheers guys! According to the Tarantula website your speakers are 85Watts. It doesn't say if that is RMS or max power, but I would guess its a max power rating. So the RMS I would guess to be about 50ish. Generally I would select a speaker, find out the WRMS rating of it, and choose an amp that has around a 10-15% higher WRMS rating than the speaker. That amp is rated at 60WRMS per channel at 4 ohms, (remember that your speakers are 3ohms so they'll be drawing a bit more current again), so I would say your speakers will be fine with that amp. However you reckon your sub is about 200WRMS? which would mean even if you bridged 2 channels of that amp it would still be underpowered. Mind you, I have a 300WRMS sony sub in one of my cars, and its powered by a cheap 2-channel amp I got off one of my mates. all it says on it is 300watts. which I'm guessing is Max watts, so i'd say its about 70ish WRMS per channel. I have that bridged and powering the sub, and its fine at low volume (it does distort pretty quick when you turn it up tho). So I think that amp you mentioned should be fine for your system just as long as you keep the volumes low. Unfortunately trying to find an Amp that will run 2 small speakers and a sub (one that is able to provide a decent amount of power each speaker/sub), would prove to be difficult - you either end up with an amp that is too powerful for the small speakers, or an amp that isn't big enough for the sub. same goes for those 5-channel amps too. I've tried in the past to match speakers+subs+amps like that, but its pretty difficult. Generally I would try to have speakers and subs on seperate amps. Some original photos have not been recovered yet.

Nar mate max power is 170 watts and rms is 85 the subs brand new are like $80 bucks and are advertized at 600w, so to be honest it cauld be less than 200rms.

$299 for a 4*100rms jaycar amp... will power those speakers fine and also will do the sub with ease... The amp may or may not be stable running 2ohm with the sub and 3ohm on the speakers... Can't promise anything...

your saying the speakers are 85rms? If so, that's pushing it a bit coz that amp is 60wrms at 4ohms, and 75wrms at 2ohms. which would make it around 67ish rms at 3ohms. I wouldn't do it then. you don't want to wreck a set of Soundstreams If you want to power all 3 of the one amp, try and look for a 4-channel amp that has 75ish-85ishWRMS at 4ohms, it should be fine for powering the whole lot. This one would be better suited http://cgi.ebay.com.au/PIONEER-GM-D9500F-4-3-2-Channel-CLASS-FD-800W-Amplifier-/400124647660?cmd=ViewItem&pt=AU_Car_Parts_Accessor ies&hash=item5d294998ec (http://cgi.ebay.com.au/PIONEER-GM-D9500F-4-3-2-Channel-CLASS-FD-800W-Amplifier-/400124647660?cmd=ViewItem&pt=AU_Car_Parts_Accessories&hash=item5d294998ec) Some original photos have not been recovered yet.

^^^ Same price as the Response 4x 100rms amp... I'd go with the Response one

The best amplifier for your application I can think of is the Alpine MRV-F545. Output in 3 way configuration 2x 125wrms fronts, and 1x 500wrms sub. Problem is they generally can only be found second hand these days, but should be within your budget. goodluck

Thansk guys realy appreciate it

while use are talking about those 4" speakers ive got a SoundStream SPA-2004 4" 840W Amp, should i be able to run those 4" soundstreams and some alpine SPE-17cs splits rated at Peak Power 210W; RMS Power 35W. Should these be fine just to run off the amp for now, then looking at intalling monoblock with a 12"sub later on.

if you have a four channel amp and then bridge a 4 ohm load across the two channels each channel will see 2 ohms each...... therefore if you were to run one 3 ohm speaker off each channel seperatley (stereo) each channel will ONLY see 3 ohm. there is no such thing as an amp for 3 ohm and as rx boy said only amps that can run lower and lower ohms. ANY amp in this configuration wouldn't even break a sweat as long is its power is high enough for your sub/speakers and the gains arent flat out

Alpine PDX-5!!!

Way out of my budget mate

Quote: Originally Posted by evers [View Post] while use are talking about those 4" speakers ive got a SoundStream SPA-2004 4" 840W Amp, should i be able to run those 4" soundstreams and some alpine SPE-17cs splits rated at Peak Power 210W; RMS Power 35W. Should these be fine just to run off the amp for now, then looking at intalling monoblock with a 12"sub later on. you got any more specs on that amp? i cant find anything on the net. RMS per channel at 4 ohms? RMS per channel at 2 ohms? etc ---------- Post added 27-05-10 at 11:11 ---------- Quote: Originally Posted by nomad [View Post] ^^^ Same price as the Response 4x 100rms amp... I'd go with the Response one Yea thats true, I missed that.

http://www.jbhifi.com.au/car-sound-g...on/amplifiers/ (http://www.jbhifi.com.au/car-sound-gps-navigation/amplifiers/)