View Full Version : Amp Recommendation 300WRMS x 2
Hey all....
I've got 2 x 12" Pioneer Subs that are rated at 300WRMS and 600W Max. The problem is that they are currently running off a pioneer 4 channel amp that is bridged and is only giving them about 120WRMS and 240W max.... which is a bit underpowered for my liking and they don't kick as hard as I know they should.
My question is, has anyone got any recommendations on amplifiers to get 300WRMS into 2 channels.... whether that be a 4 channel amp bridged to 2, or a 2 channel amp running 2 channels or a 2 channel amp stable at 2 ohms bridged into 1. whatever the configuration I just want to get 300WRMS into both of my subs for the lowest price possible.
any recommendations?
P.S. I know the normal reply when somebody asks for recommendations is for everyone to say "well I've got brand X and it goes really hard so you should get one of those". While thats great and I thank you for your reply, I don't really care what brand it is, I'm just looking for that magical 300WRMS into two subs for the lowest price.
cheers
berrjona
03-07-2003, 09:17 AM
go for a class d amp.. one tha is built to run subs...
people look at pioneer, sony alphine, kenwod and sh*t like that ad they go wow 200wrms at 4 ohm......
in reality companies like that state 200wrms and yes it is true but generally it is at 14.8 volts.... but the car dont run at 14.4 volts.... its aroun 13.8-14.2 and then the 200wrms would be something like 170wrms.... then u turn the car off and the voltage dfrops to 12volts.... and the 180wrms is more like 150wrms if that....
american brands will rate their amps at 12volts or 12.8volts..... so u turn the car oin and u gain 50wrms free....
then..... the alphine and crap like that.....200wrms.... but that could be at like 8khz.....or even more and only 120wrms at 80hz where your sub plays... so u got 80wrms that you cant even use.....
as u said though u want a budget amp..... so for that i would reccomend the jaycar 4x100wrms retails for like $399 it wont win u any comps but it will drive those subs pretty hard....
www.jaycar.com.au
just follow the links.... except u need to keep them well ventelated aas they not very efficient and heat up pretty fast but they have the grutnt u after
-=jon=-
cheers for the info berrjona I might just check that amp out.
MagnaLE
03-07-2003, 12:52 PM
Yep...like above. Best advice I can give is:
Look for an amp which rates its RMS power output at around 12V. Any amp rating it's power at 14.4V is unrealistic as most cars usually run at around 13.8V under normal conditions.
Also look for an amp with rates its RMS power output across the full human hearing range (usually 20Hz-20kHZ) and with low distortion (look for at least < 0.5%). That will give you an idea of its TRUE power output and will give you nice "clean" power to your subs.
For 300W RMS, there are few amps out there (both mono and 2 channel that can be bridged) that can give that power easily. Go to a good car audio place and they should be able to look after you :)
[quote:4e3d1a2f2d]berrjona:
people look at pioneer, sony alphine, kenwod and sh*t like that ad they go wow 200wrms at 4 ohm......
in reality companies like that state 200wrms and yes it is true but generally it is at 14.8 volts.... but the car dont run at 14.4 volts.... its aroun 13.8-14.2 and then the 200wrms would be something like 170wrms.... then u turn the car off and the voltage dfrops to 12volts.... and the 180wrms is more like 150wrms if that....
american brands will rate their amps at 12volts or 12.8volts..... so u turn the car oin and u gain 50wrms free....
then..... the alphine and crap like that.....200wrms.... but that could be at like 8khz.....or even more and only 120wrms at 80hz where your sub plays... so u got 80wrms that you cant even use.....
[/quote:4e3d1a2f2d]
hahah Berrjona.
I love how you just completely right off all the 'non' american brands all the time.
Everytime i see you post about anything audio related the first thing you say is **** pioneer, alpine, sony etc etc
Man you need to read up a bit more:
Note the voltage ratings 14.4V and 12V Not a single bit of difference (http://www.pioneeraus.com.au/car/catalogue/product_amps/amp_power_ref_chart.html)
This basically shows the drivel you posted above as ahh.. *cough* bullshit *cough*
Want me to get a few more stats from other 'shit' brands?
ENCN: How much are you wanting to spend? Whats your version of cheap?
*me edited it cause it was quite a harsh post..heheh*
MagnaLE
03-07-2003, 01:30 PM
Some amps rate their power at both 12V and 14.4V and give different power output at each level. I've seen the specs for some Alpine amps like that.
Some amps rate their power at both 12V and 14.4V and give different power output at each level. I've seen the specs for some Alpine amps like that.
That may be true, im yet to see it differently..
Have you any specs that show this? I would be very interested to see it.
Pioneer seem to give the same power outputs for the amps at the different voltage levels.... eg.... these are the specs copied of the pioneer web site for a particular amp.
GM-X574
4-Channel Bridgeable Amplifier
50Watts x 4 RMS
CONTINUOUS POWER OUTPUT – WATTS RMS
@ 14.4V (20 ~ 20kHz into 4 ohms) 50W x 4 (0.08%)
(20 ~ 20kHz into 2 ohms) 65W x 4 (0.8%)
(Bridged into 4 ohms) 130W x 2 (0.8%)
@ 12.0V (20 ~ 20kHz into 4 ohms) 50W x 4 (0.08%)
(20 ~ 20kHz into 2 ohms) 65W x 4 (0.8%)
(Bridged into 4 ohms) 130W x 2 (0.8%)
ENCN: How much are you wanting to spend? Whats your version of cheap?
I'm wanting to spend nothing :D .... but I guess I'm willing to spend up to $500.. considering I've already spent around $2500, I'm trying to keep the overall cost under $3000
MagnaLE
03-07-2003, 02:50 PM
Yeah...most Alpine amps give it!
Eg...Alpine MRV-F407:
12V: 40W RMS x 4 (4 ohms) or 50W RMS x 4 (2 ohms).
14.4V: 50W RMS x 4 (4 ohms) or 80W RMS x 4 (2 ohms).
I saw it given on a couple of other amps when I was shopping for my system, but I can't remember what they were now *doh* ](*,)
Night
03-07-2003, 03:05 PM
Jaycar Response 4x100W RMS amplifier
4x100W RMS @ 4 Ohms
4x150W RMS @ 2 Ohms
2x300W RMS @ 4 Ohms
Freq Response: 10Hz - 30kHz +/- 1dB
THD: 0.05%
Sig:Noise 90dB
Has LP & HP xover 12dB/oct 40-120Hz variable
Bass boost +/- 18dB 40-100Hz variable
These are alright for subs, but not your SQ-type amp for splits and the like... Retail for $400 from Jaycar I think, but you can buy them online from Advance Audio & Electrical (http://www.advanceae.com.au) for $354.95 - Currently you get a $20 gift voucher for purchases over $200 also... No, I'm not on commission =D It's just something I've had my eye on for a while.. One of the cheapest amps you can get for your dollar... Someone bench tested and found it ran around 110-120W RMS to a 4 Ohm load at 14.4V.... As stated before though, this could be a load of crap.. Take it with a pinch of salt...
There's a problem with some of the older models where they would produce an audible hiss.. Avoid these if you can...
I believe killbilly has one of these amps (dunno about hiss problem), so he'd probably be able to tell you more about them.
[Edit: Just re-read over the thread and failed to notice berrjona's post the first time around... ahaha.. great minds think alike... or is it fools seldom differ? Anyway, the other thing was regarding MagnaLE's post on THD... I think it's <0.05% probably just a typo, I'm not having a go at you or anything, it's just that some marketers use this as a ploy to sell their product... anything around 0.05% or below is barely noticable.. A good thing with some amp manufacturors is that some of them include birth sheet with their amps showing the stats on that amp when it was tested. Just always be aware that numbers can always be fudged somewhat]
MagnaLE
03-07-2003, 04:09 PM
*DOH* ](*,)
YES...That should be < 0.05% THD ... which is basically on the threshhold of being inaudible for human hearing.
Sorry guys....I was rushing that when I was typing...had a project meeting to go to at the same time!
MagnaLE
03-07-2003, 04:28 PM
My amps rate their power the same - at 12V and 14.4V as well with equal power ratings at both voltage levels. Most amps will have a specific voltage operating range (which is usually in the range of about 11V - 14.4V) in which it can be used.
Although, 14.4V is an unrealistic rating to give. The voltage regulator in most cars in usually 13.8V.
MagnaLE
03-07-2003, 07:35 PM
Oops...sorry guys...I tell a lie. The voltage regulator on the Magna is 14.4V.
I know in my old car ('93 Audi 80) that the voltage regulator was 13.8V 'cause I had to replace the stupid thing!
berrjona
06-07-2003, 08:27 PM
bain why do you think when you competing for spl the more batteries you have that hold a higher voltage charge the better?
gee maybe it could be so that your amps produce more power?
you go buy your japaneese crap and see what happens when you go to a spl sound off...
ZachTS
15-07-2003, 12:07 PM
USAudio from Autobarn. 4x55w. I had one of these amps powering 2 USAudio 400w 12" Subs and the bass was totally wild.SOund quality wasnt quite up there but it was definatly louder than a mates 15" MTX... and boy was he pissed (i was pleased) when i realised only ONE of the subs was going.
Im a USAudio fan now.
USAudio 1200w Digital Monoblock to power 4x Clarion V-NET 12"s
total cost, $1100 for 4 subs and amp.
Z
SiNERGY
15-07-2003, 11:43 PM
Hey all....
P.S. I know the normal reply when somebody asks for recommendations is for everyone to say "well I've got brand X and it goes really hard so you should get one of those". While thats great and I thank you for your reply, I don't really care what brand it is, I'm just looking for that magical 300WRMS into two subs for the lowest price.
cheers
If u want quality, Alpine MRV500 should do the job.
If you want budget/bang for buck, Jaycar has a 2x300wrms amp for about $300.
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