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-   -   Erich Hartmenn (or similar) cabinet for 7.3 (http://www.diyaudio.com/forums/markaudio/232334-erich-hartmenn-similar-cabinet-7-3-a.html)

silverhairbp 19th March 2013 01:13 AM

Erich Hartmenn (or similar) cabinet for 7.3
 
Was wondering if there was a cabinet design available for the A7.3 that is similar to the one from Erich Hartmann for the 10.2.

vinylkid58 19th March 2013 01:31 AM

It's kinda fugly. Wouldn't the A7.3 deserve something a little nicer looking?

jeff

silverhairbp 19th March 2013 01:41 AM

Beauty is in the eye of the engineer. Everything is a compromise.

Since there is a [VERY STRONG] strong possibility that the A7.3 will be run "full range" with a [sub]woofer blended in below, I'm looking for a compact enclosure that will provide smooth response. Pencils are just too big for my use and position the driver below where I prefer for the midrange and tweeter. I might consider sealed to protect the driver from over-excursion. That would end up being a pretty small cabinet but might limit mid-bass performance.

zman01 19th March 2013 05:57 AM

In my experience, the Alpair 7.3 works very nicely in the P10 Mar-Ken 7.3.

For a simpler build you can opt for the free CGR version Dave has on his site.

The Mar-Ken mid-bass articulation is very good; yes, you will not get the deepest bass, but for that you will be using a sub or helper woofers, right?

Another option can be a folded Half-Tower... Alp 7.3 might work with CHR-70 tuning - Dave can confirm that.

soundnovice 19th March 2013 06:00 AM

i have tried erich's vented box for alpair 10s and i am pretty happy with them. i guess with a proper 'slot port calculator' (google it) you could build similar box for A7.3 also.

soundnovice 19th March 2013 07:51 AM

Quote:

Originally Posted by silverhairbp (Post 3417062)
Beauty is in the eye of the engineer. Everything is a compromise.

Since there is a [VERY STRONG] strong possibility that the A7.3 will be run "full range" with a [sub]woofer blended in below, I'm looking for a compact enclosure that will provide smooth response. Pencils are just too big for my use and position the driver below where I prefer for the midrange and tweeter. I might consider sealed to protect the driver from over-excursion. That would end up being a pretty small cabinet but might limit mid-bass performance.

which sub you are planning? and at what xover point?

silverhairbp 19th March 2013 01:23 PM

Quote:

Originally Posted by soundnovice (Post 3417293)
which sub you are planning? and at what xover point?

I have a couple of options. I have a pair of Lambda SB12s and also a pair of ScanSpeak 25W8565s. The SB12s are in a 3.5 cu ft enclosure. Don't have an enclosure for the SS drivers, yet.

I can cross over at pretty much any frequency I want. My method will probably be to measure and listen to the Alpairs full range, then add bass reinforcement below the point of driver rolloff or maybe a little higher to help limit cone movement (series cap).

nparadis 19th March 2013 01:48 PM

Hi,

I made sealed box for the 7.3 with subs. I really think it is an option to consider. Relatively simple projet and the 7.3 behave really well in a sealed box. They sound great and their excursion is well controled. Of course, they need assistance from subs.

Here is the topics from my projet :

http://www.diyaudio.com/forums/marka...air-7-3-a.html

silverhairbp 20th March 2013 02:25 AM

I want to clarify my earlier post. I have two SB12 subwoofer enclosures and plan on a left and right subwoofer speaker. The same arrangement will be used with the ScanSpeak drivers. I'm not a big fan of single subwoofers or subs that are not located very near their respective treble channels.

In any case, the subs will be bi-amped into the system. If I filter the A7.3s (or 10.2s) it will be a first order / single cap in series with the driver.


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