Hey all

was wanting to upgrade to 8" in the front, and did not want the hassel of instaling a 3 way system.

How do 8" 2 ways system go, is there to bigger frequency gap between the tweet and the 8"?

any help would be much appreciated.

there a some 8's that will happily crossover straight to the tweeter, with no dips in the frequency range... Hertz being one, but don't ask for part numbers.

Dynaudio make System240 splits that have a 7 inch woofer and a tweeter.

Why be such a slack biatch and not go for the three way setup?

You might be better off going for a set of horn loaded compresion drivers and 8 inch mids.

Horns will play much lower than most tweeters and will match with 8 inch midbass driver a lot better.

I would go with the Dyn 7" set-up or alternatively get a tweeter that plays lower so you can run a lower crossover point, like Morel Supremo's or Dynaudio Escator's.

there are also a few Scanspeak/Vifa tweeters that play pretty low also.

Hertz have a few 8inch woofers that play really high, the HV200's play up to 3000hz nicely and the HV200L's play up to 2000hz nicely.

The L versions put out heaps more bass than the HV200's. The non L versions like sealed enclosures.

However these 8inch woofers dont have that much excursion so a set of dyn 7inch woofers would have far more bass than the Hertz 8inchers.

The dyn 7inchers have heaps of midbass. If you wanted to go custom, then some Morel 8inch woofers would be awesome matched with a pair of supremo's it would be unbeatable.

Also horns play really low as well a fair bit to choose from, it really depends if you wat to run active or passive. Some of the drivers will require customer passive crossovers which will be expensive. So it may be better going with a set that comes with crossovers designed to suit.

Morel 8inch woofers (Morel HCW8 8") matched with a pair of supremo's would be what i was looking towards.
Reason for not wainting 3 way is the factor of powering them and also i have no idea on how to set up, and can not realy be bothered with EQing.

So with the morel setup Morel HCW8 8" and supremo's would there be frequency gaps, or would they sound alright?

Also how would you run this combination, active, or with a custom crossover?
Any opinions would be great

As the others have said, since 8"s won't play all that high, you will likely also need a tweeter that plays lower..

2khz is pretty ordinary for an 8"... The 7" Dynaudio MW170s aren't too bad as a midrange - but remember, in these cases you will need to go active, or get a custom passive crossover.

There would be no frequency gap, it would extremely good. The Supremo's play really low down to 2000hz with ease.

Custom passive or active is hard to choose, if you have a headunit such as an alpine 9815 that has active crossovers on it and a spare amp then i would definitely go active.

However if you only have a 2 channel amp and a headunit without crossovers then i would go custom passive as it will work out cheaper.

Do you have an EQ because passive crossovers are very hard to get right the first time. They require much testing.

If your going active i would just get horns. Some image Dynamics CD1e Minihorns are just on $600 which is just cheaper than a pair of supremos. The Minihorns would have better imaging and volume than the supremo's by far, but the supremo's would have a slight edge in crispness. With time alignment it would be hard to get them to sound excellent on both sides of the car, where as with the horns they will image excellent in either the passenger seat or drivers.

Instalation for both would require a bit of custom work, a 3inch tweeter will require custom kick panels, and the Mini horns will have to be attached to the underside of the dash and may require some custom work also.

Because your going with 8inchers, it suggests that you have pretty loud subs, and if thats the case then the horns will win hands down.

yeah i am running Beyond Audio Inhamune 15".
The only reason for not going horns is the instal factor, not saying that it is much harder than 8" 2 way or even 3 ways. But i would not have a clue where to start. Also could any one tell me how they are amped, i seem to remember them not needing much power, is this correct?. I am running 2 amps at the momnet one for sub, and one for splits. The splits amp is an older V12 4 channel, i think it is around 4x75rms. would this be suffice?

Horns are usaly 8 ohm, but wont need alot of power 40wrms should suffice

any one have an idea on the power output of the Alpine MRV-F4005

also what is it like in regards to SQ, i know its old

Dynaudio in the US have a System 260 which is an MW170 (8") with the MD-100 tweeter. We have sold a few of these here and by all accounts they work very well. I have personally used the 8" with the Esotar to good advantage and have heard the 8" with the MD-130 as well and that sounded great also.

I currently run Supremos in my car. They are on the dash at 45 degree angle cross facing the listeners.

They are crossed over at 2250Hz hi pass.

To maximize vocals, this was about the lowest I can go before the tweeters started to sound like an oil drum can.

However, I was missing the "Sweet spot" of the vocals (3000Hz)

So, I took my 6 1/2" driver and overlapped the freq setting the low pass at 4000Hz.

With a such big driver, you're almost going to need an 31Band EQ to boost the upper vocal freq.

It should sound pretty good.

Yeah, they are quite efficient and will almost always have "dead solid imaging"

In power, most of them run a meer 10~25watts/CH.

So, in some cases, depending on how much the "Bias" is turned up on the amp, you will never leave Class A mode.

FYI, most all amps have a Class A stage. Your "Idle Current" will tell you.

Until the idle current goes up, you are in Class A Stage of the amp.

Now, that does not mean that they will all sound great (open to interpertation).