A Quick Question

[MissR34]

hey everyone

a quick question, can i run a 12" sub off a 2 way amp? or should i just go mono amp?

cheers

[nissanskyrice]

what amp and sub are they? is the amp bridgeable? if it is you could bridge the two channels into 1 and run it that way. ive got a cheapo 1200W sony sub running off a 4 channel boss amp ive just got two of the channels bridged and run the sub off that. its pretty crap but only cost me $300 total for the sub, the box and the amp.

if you could list the model numbers of the amp and sub it would help.

but in short you can run a sub off a 2way amp and whether or not to go mono is all a matter of how much you want to spend. i went with the cheapest possible option at the time and plan on upgrading later on.

[MissR34]

both the sub and amp is pioneer,

the sub is model number TS-W307D2

max power of 1,200 watts

1 or 4 ohms total impedance for system flexibilty

there is a choice of two 2 channel amps:

GM-3300T

120 x 2 chanels of max output

60 watts x 2 of power (RMS)

low pass filter (subwoofer crossover) for bass control means frequencies amplified are tailored specifc speaker capabilities

speaker level input for connection to factory fitted decks

or

GM-5300T

250 watts x 2 channels of max output

125 watts x 2 of power (RMS)

low pass filter (subwoofer crossover) for bass control means frequencies amplified are tailored specifc speaker capabilities

speaker level input for connection to factory fitted decks

bass boost provides independant accentuation of bass output

the mono amp is model GM-7300M

500 watts x 1channel of max output

250 watts x 1 power (RMS)

i guess im not too fussed on the price but the 2 channel amps are under 200 while the mono is just a little over 300

but i just wanna get the sub in asap, and wanted to know if i can run the sub on a 2 channel to begin with and then later on down the track swap it over to a mono and then use the 2 channel to run my front splits.

im a confused as i dont really understand it all

[DRD-00F]

What else would you be using the amp to power? If the answer is nothing, then don't bother with it, just go straight to the mono...

Normally 2 channel amps have one of those channels made for a sub, with crossovers and the likes... That second one is set up for that, but you will only get 250W Max out of that (which is piss all)...

When looking at amps, never read the MAX power reading, its bullshit... a marketing gimmick at best... read the WRMS reading (Watts Root Mean Square). This is a test all amps have to do to calculate how much power they can put out for a specific amount of time, SAFELY... as opposed to the MAX reading, where they pump 16V into it and burp it til it dies...

[nissanskyrice]

if you plan on getting a mono later on and using the 2 channel to run the fronts when you do then it should be fine but by the looks of it all 3 amps you listed are underspecced for that sub. if its a matter of keepin it cheap for now then i would get the 5300t 2 channel as its got 125w nominal per channel which will be pretty decent for when you have it powering your fronts. the 3300 will be quite underspecced for either job. then later on get a mono block that has about 500w nominal (not peak) probably this one if you want to stick with pioneer. PRS-D1100M. looking at the RRP on the pioneer site they seem quite a bit pricey compared to some better brands (but of course thats all a matter of opinion).

Were you installing this yourself or getting it done professionally?

[lighty01]

just bridge it for now.

use the outside + and - terminals to hook up the sub.

IE.

+-+-

Use the first + and the second - to connect the sub.

/close thread =D

[MissR34]

i wouldn't be putting it in myself cause im not exactly electronically minded..................lol

[nissanskyrice]

Well thats gonna save you a whole heap of stuffin around then. I got 1/2 way thru my install and wished i'd paid someone to do it.

But yeah looks like the best solution for now would be to bridge the 5300 and get a good monoblock later on.

[abu]

Just use the 2 channel with the LPF on, it will sound fine.

Later on, if you want more power then get a MONOBLOCK, but it will sound fine running off the 2 channel.

Usually, most amps have bass boost as well, so you will get sufficient sound out of them.

I ran one of the GMT model amps, but 4 channel with the sub bridged across all 4, and it sounded fine!

Edited October 4, 2007 by abu

[MOBASS]

Another thought would be to buy a 4 channel amp. It will cost a bit more but take up a lot less space.

Run the front speakers off 2 of the channels and bridge the other 2 channels to run the sub.

something in the ball park of 4 x 100WRMS or 4 x 150WRMS should be fine.

Simon

[MissR34]

Hey thanks everyone for all the help,

I have changed my mind, and decided to go with a JVC 12" Sub and Amp in a box much easier + very good bass too! and it works out a little cheaper to do it that way, and a little bit easier on the pocket when it comes to the install

Then all i need to worry about is getting a 2 channel amp for the splits in the front

Thanks very much once again!

Cara

Edited October 4, 2007 by MissR34

[rocketboy]

the sub is model number TS-W307D2

max power of 1,200 watts

1 or 4 ohms total impedance for system flexibilty

Prob too late, but for your info...

Looks like the sub is a dual 2ohm voice coil model. This will limit you to amps that are capable of running at 1ohm. 2ch bridged with the 1ohm option, amp will see a 0.5ohm load, most amps will not run at this and you could experience with the amp going into protect mode due to short circuit or thermal protection modes. A mono will need to be 1ohm capable if running the voice coils in parallel (1ohm option).

If you choose the 4ohm option, you may not be getting the most out of the amp from a mono. Most monos flow decent amounts of more power when the resistance is lowered to 2ohm, or if capable 1ohm or less.

A 2ch amp would work, 1st channel to one VC, and 2nd channel to the other. You would go off the rms rating for the amp runnig with a 2ohm load which would be more power than running each channel with a 4ohm load. Or you can wire the coils in series and run the amp bridged. Check which configuration would give your sub more power. The GM-5300T will do the same power in either wiring options - 380wrms. It will give more power than the 7300 as the mono is not 10hm stable and puts out only 250wrms at 4 ohms.

Out of the two the 2ch would suit this sub best. The sub is rated to take 400wrms, the GM-5300T puts out 380wrms. So you should have plenty of power to get a good amount of volume out of the sub. Remember, if you want the best out of your sub setuo, have a box of good quality and volume matched to your sub.

Hope this helps people to understand the various VC options that are out there nowadays.

Edited October 4, 2007 by rocketboy