The Quintessentially German Loudspeaker of the 70th. Modern Interpretation.

[a.wayne]

Sounds good .......

 

[Joachim Gerhard]

With a bandpass woofer you have to make a compromise between bandwidth and sensitivity. The smaller the bandwidth, the higher the sensitivity but then the impulse response gets bad. Also i am using a closed box because speakers of the 70th in Germany mostly all where closed and the Peerless woofer i use has parameters for closed.

 

[Joachim Gerhard]

Ok, i decided on a primer.
I will publish the circuit how it is at this moment and some photos.

 

[Joachim Gerhard]

Here we go...

 

[Joachim Gerhard]

Actually i am using 22nF and 15kOhm input impedance on the main amp.
The S1 is set to 300Hz ( maximum ) and i have adjusted the Phase knob for best blending.
I have EQed the woofer by ca. +4dB at ca. 35Hz.
That way the response is from 30Hz to 20kHz.

 

[Joachim Gerhard]

I made a grill and i have ordered vintage grill cloth from Fender and Vox.
This is one of them.

 

[Joachim Gerhard]

This one is from Vox AC 30 called Brown Diamond.
This one is particular " open ".
I may have to make the tweeter a bit louder when i use the denser Fender.

 

[Joachim Gerhard]

Róisín Murphy - Let Me Know (Acoustic Version) - YouTube

 

[Morfeus]

soon as my friends have aproved the sound.

We for sure will.
CU next week.

 

[Joachim Gerhard]

I am looking forward to see you too.

 

[Joachim Gerhard]

Today i got the grill cloth. The Fender cloth is more transparent then i thought. The Vox anyway.

 

[system7]

Róisín Murphy - Let Me Know (Acoustic Version) - YouTube

Aw, it's a Little Girl With A Guitar (LGWAG) speaker!

Hey, just kidding.

Looks very nice, Joachim.

 

[Joachim Gerhard]

Thanks, i hope i get the grills ready before FF.
The Blue Fender fits the best i think.

 

[Joachim Gerhard]

Here is Frans with the German Speaker on Frickelfest.

 

[Elias]

This one is from Vox AC 30 called Brown Diamond.
This one is particular " open ".
I may have to make the tweeter a bit louder when i use the denser Fender.

Hi,

Where to buy online the Diamond fabric ?


.

 

[Joachim Gerhard]

You can buy it at shops that sell guitar tube amplifiers.
It is quite expensive.

 

[Morfeus]

Here is Frans with the German Speaker on Frickelfest.

It really sounded great, I was very impressed, Joachim.

 

[Joachim Gerhard]

Thanks. I just put them there and let the others play.

 

[system7]

Joachim I think we've all enjoyed this project. And thankyou for sharing it.

It would be very nice if you can do a tidy summary at some point. As I see it, you've used a 10" paper subwoofer covering up to 100Hz, with two peerless 5" paper midwoofers, a very good Wavecor 30mm soft dome tweeter coming in at 1.5kHz, and a 22mm supertweeter above 5kHz. All shallow LR2 slopes.

The wide cabinet needs very little bafflestep correction. It all hangs on the quality of the 30mm tweeter IMO: Wavecor TW030WA05-01 (ea.)

Spendor still do the double tweeter arrangement:

An externally hosted image should be here but it was not working when we last tested it.

Without being disparaging about the look of it, don't you think it looks a bit like someone is drying towels on your speakers? Just sayin'...

 

[Joachim Gerhard]

It ain´t pretty, sure. I have ideas to improve the look. I think a grill over the complete front will look better and i would trim the edges with metal strips. The Fender cloth is very expensive so i bought only a small piece.
Crossover to the bass is 300Hz to get rid of the Allison effect.