800w MONO block amp question?

[Boostn247]

Would this be able to pump 2x12" Kenwood subs decently?

Can i use this monoblock amp & wire subs up in parallel??

FEATURES:

200 Watts RMS @ 4ohms

310 Watts RMS @ 2 ohms

400 Watts Max @ 4 ohms

800 Watts Max @ 2 ohms

Stereo in and out (to continue to a second amp)

High-efficiency MOSFET power supply FR4 PCB

Heavy duty heat sink

Die casting terminal and gold plated RCA jacks

Lowpass electronic crossovers with adjustable frequency

Variable phase shift control

Subsonic filter and phase shift

Adjustable input gain control

Short circuit/thermal/overload/DC offset protection

Soft delayed remote turn-on/off circuitry

Power/Protect LED indicators

4 ohm ratings are for a single speaker, 2 ohm ratings are for two speakers in parallel

[drunkenmaster]

depends on the impedance of your "kenwoods".

On paper it should run well.

In practice it will only be as good as the build of your subs, the amp and the install.

[Mandingo]

what amp is it buddy?

[martydaman]

im more interented in the model of the kenwoods. can you give some specs of the subs?

[REDFC]

Helo,

I am selling a Audiobahn A8000T Monoblock amp for 450$ DELIVERD.

2 hours use, in the box. PM ME!

With reciepts!!! RRP 800!

[Boostn247]

the subs are:

KFC-W3009

300mm Component Subwoofer

[Feature Highlights]

Peak Input Power: 800W

300mm "Typhoon" Shaped Injection P.P.Cone Woofer (Black Colour)

Dual Magnet Drive

High Roll Surround

Aluminium Centre Cap (Red Colour)

Aluminium Model Name Plate for Back Side Installation

Sealed/ Ported/ Free Air Type Installation Capabillity

-----------------------------------------------------

[General Features]

Impedance: 4 Ohms

Sensitivity: 93dB/W/m

Frequency Response: 25-800Hz

Size (WHD): 328x328x155mm

Mounting Depth: 135mm

Magnet Weight: 1800g (63.4 oz)

Peak Input Power

800W

Max Input Power

400W

Rated Input Power

200W

Woofer Features

300mm "Typhoon" Shaped Injection P.P.Cone Woofer (Black Colour)

Dual Magnet Drive

High Roll Surround

Aluminium Centre Cap (Red Colour)

Extended Pole Piece

Easy Screw Bind Terminal

Aluminium Model Name Plate for Back Side Installation

Sealed/ Ported/ Free Air Type Installation Capabillity

-------------------------------------------------------

What sort of amp should i buy to pump these subs really well!

[Eug]

shouldn't the amp (RMS) = the sub (RMS)???

[drunkenmaster]

well, with subs in parallel this is what your amp will be doing:

310 Watts RMS @ 2 ohms

Build a good box and see how you go.

[Boostn247]

Do u mean each of my siubs will be getting 310wrms @ 2ohms, or 155wrms per sub!

[slow_r31]

the later

[drunkenmaster]

dont get drawn into the marketing hype, 150Wrms is more then enough to get the subs moving.

Focus on the quality of the box to make the best of the equipment you have chosen.

[Chris Rogers]

as above..

( also note the PM as well. I didnt see this thread until after I replied.)

[astroboi]

i dun think that would be enough...

i currently have about the same power going into my subs...

2 12" pioneer subs....800w max also...

and i am going to change soon to a bigger amp...

i personally would recommend going a bit bigger amp...

something that would give at least 250w rms to each sub,

gives it more thump...

but also, would the box make much difference?

i have a concealed box atm, should i make a hole in it and port it?

what difference does it make and anyone done it who can verify it's changes?

thanks....tommy

[martydaman]

im regards to porting a box, i think it depends on the displacement of the sub when in use (specs should be on the box or manual), some are designed for free air use, other arnt so porting can allow for a slight difference.

As far as i know, the weaker and smaller subs such as the 250Watt Kicker ive seen at Repco comes with a box which isnt ported (at least the one i saw) and i checked the specs of it and its displacement was quite small when compared to more upmarket subs like JL's which have much bigger displacement in comparison and come with ported boxes.

My 12" Pioneer isnt ported, it came with a professionally specified box for it and i guess a port wasnt needed. Im also wondering if porting it would have a noticible difference in SQ.

thats my understanding at least

[drunkenmaster]

Take you sub out of the box all together and play it and you will find it makes no noise.

Put it in a poorly made or incorrectly sized box and it will make some noise.

Put it in a well made box of correct size to suit the speaker specs and it will make the best sounding and most noise.

i.e. make sure your install and box are up to scratch before throwing more money on more parts. The volume required for a ported box will be different from the volume of a sealed box for the same speaker. There is also more to it then drilling a hole, you have port size and length to contend with. Speaker specs are there for a reason and your box should be built with them in mind otherwise you are just wasting your time and money, there is no one size fits all.