Mini Project with Tangband W3-1723

QAE · 30th October 2009, 02:13 PM

Hi guys,

Some time ago I developed a small speaker for a family member.
Maybe some of you are looking for such a speaker...

During the developement I decided to build 2 versions: One version that can play quite loud, and a version with a flat response and a directivity control as good as possible.

I have to split the postings due to the fact that I can just upload 10 pics max.

QAE · 30th October 2009, 02:55 PM

Project 1:

Spl:

Phase:

Step Response:

Group Delay:

CSD:

K2 85-90-95dB:

K3 85-90-95dB:

Polar Horizontal 1W-m:

Polar vertical 1W-m:

QAE · 30th October 2009, 03:03 PM

Project 2:

SPL:

Impedance:

Phase:

Step Response:

Group Delay:

CSD:

K2 85-90-95dB:

K3 85-90-95dB:

Polar horizontal 1W-m:

Polar vertical 1W-m:

QAE · 03:41 PM

Crossover for project 1:

Crossover for project 2:

I removed the diffusor at the tweeter(just cliped), because without, the directional behaviour is much better. The helmholtz resonance from the diffusor in the high frequency range also disapeared...

Difference with and without diffusor:

I also made an Excursion over Frequency measurement from the project 2 speaker. I used a very good and light(0.7g) PCB accelerometer and fixed it directly at the cone:

Around 970Hz you see a spider resonance:
Imageshack - spiderproblem

Suround Resonance around 1500Hz:
Imageshack - surroundproblem

Two tone test:
Imageshack - twotone2

These small speakers do really sound well due to their size. Of course bass is limited, but with a small woofer you receive a great small and cheap system.

Have a nice day,

QAE

QAE · 30th October 2009, 04:08 PM

Oh man...

I made a mistake with imageshack!

Here you can download all the pics. I also added some other measurements...

http://quint-audio.com/qaudioenginee..._project_1.rar

http://quint-audio.com/qaudioenginee..._project_2.rar

Sorry...

30th October 2009, 02:13 PM	#1
QAE diyAudio Member Join Date: Oct 2009	Mini Project with Tangband W3-1723 Hi guys, Some time ago I developed a small speaker for a family member. Maybe some of you are looking for such a speaker... During the developement I decided to build 2 versions: One version that can play quite loud, and a version with a flat response and a directivity control as good as possible. I have to split the postings due to the fact that I can just upload 10 pics max.

30th October 2009, 03:28 PM	#4
QAE diyAudio Member Join Date: Oct 2009	Crossover for project 1: Crossover for project 2: I removed the diffusor at the tweeter(just cliped), because without, the directional behaviour is much better. The helmholtz resonance from the diffusor in the high frequency range also disapeared... Difference with and without diffusor: I also made an Excursion over Frequency measurement from the project 2 speaker. I used a very good and light(0.7g) PCB accelerometer and fixed it directly at the cone: Around 970Hz you see a spider resonance: Imageshack - spiderproblem Suround Resonance around 1500Hz: Imageshack - surroundproblem Two tone test: Imageshack - twotone2 These small speakers do really sound well due to their size. Of course bass is limited, but with a small woofer you receive a great small and cheap system. Have a nice day, QAE Last edited by QAE; 30th October 2009 at 03:41 PM.

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30th October 2009, 02:55 PM	#2
QAE diyAudio Member Join Date: Oct 2009	Project 1: Spl: Phase: Step Response: Group Delay: CSD: K2 85-90-95dB: K3 85-90-95dB: Polar Horizontal 1W-m: Polar vertical 1W-m:

30th October 2009, 03:03 PM	#3
QAE diyAudio Member Join Date: Oct 2009	Project 2: SPL: Impedance: Phase: Step Response: Group Delay: CSD: K2 85-90-95dB: K3 85-90-95dB: Polar horizontal 1W-m: Polar vertical 1W-m:

30th October 2009, 04:08 PM	#5
QAE diyAudio Member Join Date: Oct 2009	Oh man... I made a mistake with imageshack! Here you can download all the pics. I also added some other measurements... http://quint-audio.com/qaudioenginee..._project_1.rar http://quint-audio.com/qaudioenginee..._project_2.rar Sorry...

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