Mpl

[mekr]

MPL

Hello Joachim,

Thanks for sharing so much information about open baffle speakers with Enviee drivers on this forum, even i was also planning to build open baffles with widerangers and could not decide which wide range driver to buy out of Fertin,Lowther or Wolf Von langa, and also recently read on the net ,very positive reviews of loudspeakers built with Enviee drivers ,kindly share with us how does your open baffle with Enviee drivers sounds.

Thanks

 

[mekr]

MPL

Hello Joachim,

Thanks for sharing so much information about open baffle speakers with Enviee drivers on this forum, even i was also planning to build open baffles with widerangers and could not decide which wide range driver to buy out of Fertin,Lowther or Wolf Von langa, and also recently read on the net ,very positive reviews of loudspeakers built with Enviee drivers ,kindly share with us how does your open baffle with Enviee drivers sounds.

Thanks

 

[Joachim Gerhard]

The Envie is without question one of the finest wide band drivers.
I even think it is the best i heard so far. When correctly equalized it is neutral in tonal balance. It has tremendous dynamics and an additional tweeter is not necessary.

 

[mekr]

Dear Joachim,

how is the soundstage and liveliness with Enviee driver in OB,

I had heard a speaker with lowther driver,the soundstage was so holographic, that i could feel musician sitting right around me,though overall i could not bear the sound for more than few minutes.since then i have been searching net for a driver with holographic soundstage,but without harshness.

Thanks

mekr

 

[Joachim Gerhard]

The soundstage is amazing. That is one advantage of a wide band driver.
It is phase coherent and the sound comes virtually from one point in space.

 

[graaf]

Stereo Unlimited tweak

extensively discussed here: http://www.diyaudio.com/forums/multi-way/121385-advantages-floor-coupled-up-firing-speakers.html

with toeing of the dipole null towards the listener it can become a sort of a virtual 4 channel setup where the first lateral reflections (adjacent side wall and front wall) are work as the actual sound sources

 

[Joachim Gerhard]

I had that idea many years ago and i told it Rick Beveridge, son of Harold Beveridge and Allen Perkins so i have witnesses.
I even have a patent that mentions that " Gekreutzte Schallwand".

 

[Joachim Gerhard]

Here for something different and funny :
Bookshelf Boombox | MAKE

 

[Joachim Gerhard]

Here is the patent :
Gekreuzte Schallwand - Dokument DE102008016703A1

 

[RCruz]

What do you think about the TDA2003 amp ?

I am planning to build a stereo amp for my TV set and would really apreciate your input ?

Are there any TDA type "hifi" chips ?

 

[Joachim Gerhard]

Yes, there is a bigger one from ST with mosfets that is rather good.
You could also build a Gainclone.
When you want really HiFi sound you can build my amp from the Nobrainer thread.

 

[Joachim Gerhard]

Go to post 112.

 

[RCruz]

http://www.diyaudio.com/forums/analogue-source/195017-jg-s-nobrainer-nobrainer-discrete-12.html ?

 

[RCruz]

Is this the chipamp ? DIY Chip Amplifier Kits, PCB's, Components and Information.

 

[Joachim Gerhard]

Yes, that is the no-brainer thread.
The Audio Sector Gainclone is not bad ether.

 

[Rudolf]

Congratulation,

This has evolved into a viable product:

Now can you give us some more information than here?

 

[Joachim Gerhard]

Thanks.

 

[Joachim Gerhard]

amroc - the room mode calculator

 

[Joachim Gerhard]

Rudolf, the biggest problem i faced was to make the baffle as slim as possible.
Nobody will put a 1,2m wide baffle in his living room unless he ( she ) is as crazy as we are. That width is the minimum i identified to reach down deep enough to augment it with a sub where the transition frequency is not audible. I would say that is around 120Hz.
The first trick is to damp the back wave so we have more of a cardiod here. The second is to use a rather thick baffle that also makes the distructive path to the back a bit longer.
The acrylic extensions make the speaker at least visually slimmer.
I even personally prefer a single Enviee with wizzer but the world is not ready for this yet so i use the Enviee without wizzer and cross at ca. 8kHz with a 4th order L/R crossover to a RAAL dipole that is not damped in the back, safe a foam grill.
The black rings ensure time alignment so that i can save an all pass delay in the crossover.

 

[Joachim Gerhard]

cornell researchers 3D print a fully functional loudspeaker