Quickie Amp and Sub question.
- Thread starter PhatAshKi
- Start date
Currently reading:
Quickie Amp and Sub question.
Choas
Looking at a couple of diagrams from the manual of my old amp, two 4ohm subs in paralel has a combined impedance of 2 ohms, and two 4 ohms subs in series has a combined impedance of 8 ohms. So wouldnt i need an amp that is 2 - 8 ohm compatible?
Or have i got this all wrong ??
Bet your sick of me by now lol
Looking at a couple of diagrams from the manual of my old amp, two 4ohm subs in paralel has a combined impedance of 2 ohms, and two 4 ohms subs in series has a combined impedance of 8 ohms. So wouldnt i need an amp that is 2 - 8 ohm compatible?
Or have i got this all wrong ??
Bet your sick of me by now lol
- Joined
- Jan 16, 2005
- Messages
- 10,608
- Points
- 1,450
PhatAshKi said:
No, it be one OR the other. The instruction manual really wouldn't apply here, as the manual deals with single voice coil subs by the sounds of it. I believe you have dual voice coils - you should have 2 sets of speaker terminals on the sub - probably each set opposite each other
Only one set, A + and -
On closer inspection of the sub i have and in the pictures, the pictures do have 2 sets of connectors. This makes it that much harder for me to know the wattage as now as i cannot find any information on them. On the site it says the subs are on their 3rd revision. Have emailed them and asked for the wattage. Sorry to waste ur time Chaos altho it has been helpfull and will know wat to do now when they email me back
On closer inspection of the sub i have and in the pictures, the pictures do have 2 sets of connectors. This makes it that much harder for me to know the wattage as now as i cannot find any information on them. On the site it says the subs are on their 3rd revision. Have emailed them and asked for the wattage. Sorry to waste ur time Chaos altho it has been helpfull and will know wat to do now when they email me back
Yeah thats wat the manual looks like it says, Cheers
Yo Chaos, Just wondering if ya can help me out again,
Found this alpine amp, its 200 quid and 4 channels, the RMS power rating is
Would love ya to confirm this so im not wasting the bucks.
http://www.alpine-europe.com/content/english/a2328.det.MRP-F450_4-3-2-CHANNEL-POWER-AMPLIFIER.htm
Found this alpine amp, its 200 quid and 4 channels, the RMS power rating is
- Per channel into 4 ohms: 70W x 4 (0.08% THD)
- Per channel into 2 ohms: 140W x 4
- Brigded 4 ohms: 350W x 2 (0.3% THD)
Would love ya to confirm this so im not wasting the bucks.
http://www.alpine-europe.com/content/english/a2328.det.MRP-F450_4-3-2-CHANNEL-POWER-AMPLIFIER.htm
PhatAshKi said:
Providing the subs are rated 350w RMS @ 4 ohm then yea would be a pretty smart match
Any suggestions?, Been looking ages now, and cant get one high enough for rms, with 2 channels, most are around 260, or bigger like 450.
Looked into mono amps and they are mega more expensive, at least with a mulit channel if i have a change around can use the other channels for something? Just a thought
Looked into mono amps and they are mega more expensive, at least with a mulit channel if i have a change around can use the other channels for something? Just a thought
Last edited:
Not really can go higher but would have to be significally better, as it is a lot of money for just an amp. Would need to a good one that would last so can keep.
You are a legend, Thx m8 for the help
- Joined
- Jan 16, 2005
- Messages
- 10,608
- Points
- 1,450
Potential amps.................
http://www.caraudiodirect.co.uk/product_info.php?products_id=4507
http://www.caraudiodirect.co.uk/product_info.php?products_id=4172
Haven't even started looking at second hand stuff yet
http://www.caraudiodirect.co.uk/product_info.php?products_id=4507
http://www.caraudiodirect.co.uk/product_info.php?products_id=4172
Haven't even started looking at second hand stuff yet
I have the second amp youve shown. i got it brand new for £120 deliverd on ebay on clearance stcck. looks great, but havnt had the chance to install it in my car yet. i wont get the chance either coz it sgoing bck on ebay soon so i cant comment on its performance
Jordan
so i cant comment on its performanceJordan
Thx for looking choas but with the first one being 400wrms and second 500wrms as well as being in mono wouldn't the figues be shared between the 2 subs, instead of 350wrms each with the amp i suggested, So which would be better?
Forgive me if i am wrong, bloody wish i had 1 sub now would be much easier.
Forgive me if i am wrong, bloody wish i had 1 sub now would be much easier.
A&R Jordan said:I have the second amp youve shown. i got it brand new for £120 deliverd on ebay on clearance stcck. looks great, but havnt had the chance to install it in my car yet. i wont get the chance either coz it sgoing bck on ebay soon
Jordan
How much you want for it Jordan, Is it New???
chaos said:No, you'd wire both subs together to show a 2 ohm load overall
Yep worked that out last night, Wire in parallel and total of 2 ohm load,
I bought the second amp you suggested above so 900w in 2ohms, Will need to turn gain down a little so not much higher than 700 but basically perfect.
Also bought a kenwood 300wmax/ 100wrms for my componants upfront just need fixing in wen all delivered.
At the mo it will only be running 10cm componants upfront, 10cm in rear and the subs. Ill see how it sounds and if the rears are not heard think ill invest in some 15cm componants for the rear. Front tweeters are going in the a piller above my head just near the sunvisor so aiming right at me.
