Amp question!

[soilsample]

Hello All,
I'm probably going to buy this amp if it will do what I need:

# Rated Power (stereo): 75 W RMS x 4 @ 1.5 ohm-4 ohm (11V-14.5V)
# Rated Power (bridged): 150 W RMS x 2 @ 3 ohm-8 ohm (11V-14.5V)
# THD at Rated Power: <0.03% @ 4 ohm
# S/N Ratio*: >108.5 dB below rated power
# Frequency Response: 5 Hz-30 KHz (+0, -1dB)
# Damping Factor: >200 @ 4 ohm per ch./50 Hz
# Input Range: switchable from 200mV-2V RMS to 800mV-8V RMS
# Dimensions: 13.4"L x 9.25"W x 2.36"H
# Differential-Balanced Input Topology: (2 pairs of inputs)
# Front Crossover: fully-variable (50 Hz-5 KHz),
# selectable-slope LP or HP (12 or 24 dB per octave)
# Rear Crossover: fully-variable (50 Hz-5 KHz)
# selectable-slope LP or HP (12 or 24 dB per octave)
# Speaker output connections: accept up to 8ga. wire +12V
# Ground connections: accept up to 4ga. Wire

My question is:
Can I use the front 2 channels to power a pair of 6.5" components, and use the 2 rear channels bridged into 1 channel to power my 8"sub?

If so, will the bridged rear channel need a 2ohm or 4ohm sub?

Thanks
Donald

 

[car46999]

Answer to first question is: Yes

Second question
Any subwoofer with a rating of 3-8ohm will give you 150wrms for your sub.

Do you have an eight yet?
If not there are quite a few JL Audio 8w6 subs on ebay. Which would give you 3ohms, and fit in a 0.375 cuft net box.
The Elemental designs 9Kv.2 also is a small box sub. You would want the dual 2ohm version.

Good luck, and good choice for an amp. Just read the manual, and it should tell you power wire requirements, and setting it up.

 

[bgibb68]

or get a decent DVC that is 4ohm each coil and wire each one in parallel...you not gonna hook up the rear speakers to an amp???the best amp for subs are monoblock amps


edit: i didn't see it saying bridgable but 99.9% of multichannel amps are so not really a big deal and if you bridge the rear it's 'default' will still be 4oms.....it's how you wire up subs that will change the resistance....i would recomend a 2 ohm single voice coil or go for the 2 voice coil like i mentioned....you would like the dvc

 

[car46999]

or get a decent DVC that is 4ohm each coil and wire each one in parallel...you not gonna hook up the rear speakers to an amp???the best amp for subs are monoblock amps


edit: i didn't see it saying bridgable but 99.9% of multichannel amps are so not really a big deal and if you bridge the rear it's 'default' will still be 4oms.....it's how you wire up subs that will change the resistance....i would recomend a 2 ohm single voice coil or go for the 2 voice coil like i mentioned....you would like the dvc

A 4ohm DVC subwoofer would not work wired parallel (bridged). That would present a 2ohm load, if ran off the rear channels bridged. If ran stereo a 4ohm DVC would work. Also a 2ohm SVC would not work (bridged ohm range is 3 to 8ohms).

And the amp is bridgeable (the spec is in the second line of the OP specs), but this amp is a bit different than a normal amp, it is not "4ohm default". The 300/4 will create max power by looking at what load is hooked up. Its normal bridged range is 3 ohm-8 ohm, it will adjust to that ohm load and produce rated power.

 

[soilsample]

Thanks for the replies folks!

I got a JL audio 4 ohm sub (single voice coil).
Works great! Just finished my install today.


I got some Image Dynamics 6.5" components that sound awesome.