using one bridged channel to power 2 subs

 

New member
Username: Kure

Post Number: 1
Registered: 01-2004
heres the deal if i had 2 R.fosgate he2 subs rated at 400rms at 2ohm and i had a fosgate mono amp with these rating
Subwoofer Mono Amp Specifications

Amplifier Type: Mono
RMS Power: 300W x 1 @ 4 ohms
Bridged RMS Power: 500W x 1 @ 2 ohms
THD at Rated RMS Power: 0.05%
Speaker Level Inputs: No
Preamp Outputs: Yes
Built-In Crossovers: LP
Bass Boost: 0-18 dB
Frequency Response: 20-20,000 Hz
Channel Separation: n/a
Signal to Noise Ratio: 100 dB
Fuse Rating: 50 amps

the bridged channel thats rated 500rms 2ohm , if i ran the two subs from that one 500watt channel
would each sub get 500watts rms or 250rms each at 2 ohm

thaks
need help quick
 

New member
Username: Bass_lover

Post Number: 5
Registered: 01-2004
no each sub wouldnt get 500watts rms, plus your running 2 2 ohm subs of 1 2 ohm channel thats 4 ohm in total and the amp only does 2 ohm bridged it could damage your amp. I would buy a new amp rated at 800watts rms or more.
 

Anonymous
 
Most subwoofer amps can handle 2 to 6 ohms you would be running 4 ohms so each sub will be getting 125w max bridged

and by the way it wont dammage anything and dont even think about getting a new amp.
 

New member
Username: Kure

Post Number: 2
Registered: 01-2004
so what would be the best sulotion if i want to run about 250rms to each sub
buy a 2 channel that pushes 300watts 2ohm to each channel

an which is better 2 or 4ohm
 

New member
Username: Kure

Post Number: 3
Registered: 01-2004
so what would be the best sulotion if i want to run about 250rms to each sub
buy a 2 channel that pushes 300watts 2ohm to each channel

an which is better 2 or 4ohm for subs
 

New member
Username: Bass_lover

Post Number: 9
Registered: 01-2004
yep buy a amp that can handle 800watts max. not sure about an amp that pushes 300watss to each sub you could under power them. And 2 ohm is better if you really like true power but if you simply just want bass stick with 4 ohm. When you buy a new amp just ask the guy if they go together.
 

Anonymous
 
2 ohm is muck more powerful i dont know what this matt guys on about but if you want to get maximum power i would buy two of those mono amps and you would be getting 500w rms out of each sub it would be an awesome setup.

But also subwoofer only run of about 50w true power so 125w to each sub is more than enough.
Or you could get a 4 channel mosfet subwoofer amp
and bridge each sub on each channel at 2 ohms.

but th most efficent way to do this is to get 2 of the mono amps or a 2 channel id go with the 2 channel it would work out cheaper.

but remember you only need 50 watts. each sub.

GOOD LUCK
 

New member
Username: Glasswolf

Post Number: 766
Registered: 12-2003
a: the amp isn't bridged. it's only got one channel to begin with.
nothing to bridge.

you have two 2 Ohm subs? you can't wire both of them to that amp and get a 2 Ohm load.
you can get a 1 or 4 Ohm load, and the amp isn't 1 Ohm stable, so you get 4 Ohms.
the amp puts out 300W @ 4 Ohms, so each sub will get 150 watts.

put one sub on the amp to get 500 watts to that sub, and get another amp for the other sub, or get two 4 Ohm subs.

also get a high output alternator if you plan to run more than that one amp.
you may still need one for that amp, but I'll guarantee you'll need it if ya add any more power.
 

New member
Username: Kure

Post Number: 4
Registered: 01-2004
so what are the disadvantages of bridging??

which one sound best? bridge the 4 channel amp to get the 2ohm of two channels
or
or jus get a 2 channel amp that pushes the watts i want in 2ohm
 

New member
Username: Glasswolf

Post Number: 779
Registered: 12-2003
when using a bridged channel, you can only use a 4 Ohm load.

in bridged mode teh amp sees half the actual load.
 

New member
Username: Kure

Post Number: 5
Registered: 01-2004
so what do u suggest i do to power the two 12" HE2 2ohm fosgate subs rated at 400rms
 

New member
Username: Glasswolf

Post Number: 797
Registered: 12-2003
two 2 Ohm subs?
get a kicker monoblock amp.
KX600.1 is good
run it at 1 Ohm.
300wRMS per sub
 

New member
Username: Kure

Post Number: 6
Registered: 01-2004
thanks
1ohm is better?
 

New member
Username: Glasswolf

Post Number: 808
Registered: 12-2003
in this case, you have two 2 Ohm subs, and the Kicker amp is 1 Ohm stable, so it works out to be a good match.

very good match in fact.
 

New member
Username: Kure

Post Number: 9
Registered: 01-2004
thankz
 

New member
Username: Kure

Post Number: 10
Registered: 01-2004
The KX600.1 Class D amplifier generates 600 watts RMS of power at 2 ohms, drawing less current and producing less heat than traditional amp designs. The built-in variable low-pass crossover (50-250 Hz, 12 dB per octave), KickBass boost (0-18 dB of boost at 40 Hz), and defeatable subsonic filter shape the character of your bass to fit your sub, its enclosure, and the acoustics of your vehicle.

The remote gain controller lets you set the amp's KickBass from the dash, so you can make instant low-frequency adjustments to fit the type of music you're playing. The Amp-Strapping circuit allows you to tie together two KX Series amps to power one sub. A removable metal shroud hides all wiring connections for neat installation (it can be left off to save space).

300 Watts RMS x 1 @ 4 Ohms
600 Watts RMS x 1 @ 2 Ohms
25 Hz Subsonic Filter
Efficient Class D Amp Design
0-18 dB Kickbass Bass Boost @ 40 Hz
Dash-Mountable Remote Bass Level Control
Speaker And Preamp Level Inputs
Preamp Outputs
MOSFET Power Supply
Frequency Response: 20-200 Hz
4-Way Protection Circuits
Requires 4-Gauge Power And Ground
Dimensions (W x H x D): 16-1/16" x 2-9/16" x 10-5/16" (Including Removable Shroud)

so when i put the two 2ohm subz to the 600watt channel each sub will be gettin 300watts at 1ohm? or 2ohm

 

New member
Username: Glasswolf

Post Number: 814
Registered: 12-2003
damn. the kx600.1 is only 2 Ohm stable.
the 1200.1 is stable to 1 Ohm. I figured the 600 was as well.

Ok what you want to go with then is the JBL BP600.1
that is for a fact 1 Ohm stable, and at 1 or 2 Ohms it will give you 300 watts per sub
 

New member
Username: Kure

Post Number: 11
Registered: 01-2004
thankz again

and the jbl has good sound quality?
 

Billy meyers
Unregistered guest
I don't know much about car systems, but I have two rockford fosgate 10s 8Ohm, about what size amp would be the best to push these two tens.
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