looking for good mid woofer to use with Ribbon Tweeter.

[samsagaz]

trans192 thank, ill buy all my drivers in madisound so maybe the Morel is an good choice ill see his curves...
thanks

[5th element]

Yes I measure using a microphone with JustMLS

I place the mircrophone where I intend the listening axis to be.
Then I measure the woofer at this position, the tweeter at this position and then the woofer & the tweeter at this position.

Then I import the woofer and tweeters independant responses into LSPcad and use the woofer & tweeters measured response as a target.

Then I fiddle with the parameters in the program to get LSPcads simulated response to match the actual measured response of the two drivers together. When mactching the SS 6ohm tweeter with the peerless 8ohm midbass I had to increase the tweeters response by 3db.

[samsagaz]

thanks 5th element...

i ordered an ECM8000 today

[Tim Moorman]

The ECM8000 requires a pre-amp with a 48v phantom power supply if it is to be used for speaker measurements. The Behringer gear, like the Ultra Curve Pro, come with it.

Also, have a look at Seas CA18RNX midwoofers. You may give up some tweeter efficiency to match levels, but it should not be noticeable so long as phase is correct at the crossover.

I have heard the AC G2 paired with a single 87dB Seas and the highs were exceptional. You may have some loss of vertical dispersion compared to a dome, but again, it wasn't noticeable to me.

Tim

[samsagaz]

Ok, TIM, ill made an pre for my ECM i see a few schematics on the NET. i think that it will be more cheap than build an Real Time Analizer.



i still looking for others drivers....

in the center dont will be have problems for the MTM conf, but for the 2 frontal speakers maybe ill get some problems

thanks for all your comments guys.

[Tim Moorman]

Look at the pro stuff - Beyma, RCF, Ciare, Eminence. Vintage Coral, Altec, Philips, JBL and others may also match up. Problem is that these all will need a separate bass unit to deliver the goods.
Try open baffle, too. May be surprised.

Tim

[samsagaz]

well look at this.

Frontal (too much to lower here 6dB)
---------
1 Tweeter G2Si 6 Ohms / 96dB
1 Eton 4-300 8 Ohms / 88dB
1 Eton 8-800 8 Ohms / 89dB

Center (looks like i need to lower like 3dB)
--------
1 Tweeter G2Si 6 Ohms / 96dB
2 Eton 5-880 / 87 dB


this will be ok? the sens is not too low in the Frontal ?

or i need to consider to change the eton for morel or phl?

[Tim Moorman]

samsagaz

I can only speculate as to how all that might sound. I have not heard any of the drivers, except the tweeter.

On paper, it should work just fine, so long as levels are matched(L pad on tweeter). But keep in mind that the blend of drivers is really more about the crossover design than the relative efficiency of each part, although it does seem to be less desirable for optimum sound to pad the tweeter so heavily.

With any kind of baffle step correction, the efficiency will drift toward mid 80's. That may be OK for ss amps and Home Theater conditions.

If you are so inclined, you might also try a high efficiency version with a mid or midbass in the mid 90's dB range, and add a sub w/plate amp.
With a small class A amp or tube gear, the sound can be pretty glorious.

Tim

[samsagaz]

damn is hard to choice the right drivers

the curves of the eton drivers are the best that i see with the price of these drivers.


its amazing, too hard for me

hehe

thanks for your help

[markp]

Take a look at the Hi-Vi F6 woofer at Partsexpress.