My first diy speakers

[Jonazkur]

Hello! This is my first try to do decent diy speakers and wanted to share some pictures. They use peerless hds 830869 woofer and sb26adc tweeter in 8" waveguide. They are still in progress so i will post more pics and info when i finish them. My plan is to try make a spinorama for these. There is some early on and off axis gated measurements.

 

[SIY]

Nice dispersion! Well done.

 

[Jonazkur]

Nice dispersion! Well done.

Thanks! They already sound pretty good imo better than my genelec 8040bs and off axis is smoother. Im gonna mess with the tweeter level and probably lower it 0.5 or 1db still. Ill try to make some more accurate measurements later in bigger space.

 

[DanielT]

Well made DIY speakers! Damn nice waveguide and nice round baffle corners.

It shows that it is possible to make good two-wave speakers with the combination of an eight-inch bass driver and a one-inch tweeter. Prerequisite then; the right type of tweeter, sb26adc in your case, which can be set with a relatively low crossover point together with a waveguide.
Then you have a pair of DIY speakers that measure and sound better than these commercial two-way floor standing speakers with eight inch bass and one inch tweeter in the threads below. Actually, it's not that strange because they lack everything I mentioned yours have:

Audio Note speakers

What's the deal with Audio Note speakers ? They have so many models and they're not exactly cheap (can cost over $100K) And it seems they're "legendary " speakers on other audiophile forums. What's so special about them ?

audiosciencereview.com

Tekton M-Lore Speaker Review

This is a review, listening tests, equalization and detailed measurements of the Tekton (Mini) M-Lore speaker. It is on kind loan from a member and costs $US 750 a pair. As you see, this is a mini-tower speaker if there is such a thing. I had to put a 6 inch stand under it to get the tweeter...

audiosciencereview.com

Edit:
Peerless hds 830869 seems to have break up modes around 3 kHz.It appears to be a 7 dB peak if you check the FR measurement below.
Do you have a notch filter in your crossover to take that peak down? Or maybe you don't hear it? A notch filter is therefore not needed for you.

Peerless 830869 | HiFiCompass

hificompass.com

 

[Matt_Holland]

Saw these on the DIY speakers Facebook group. I think you’ve done a great job.
Will you be able to measure impedance and distortion as well a more comprehensive spin?
It would also be great to know how you designed the waveguide and also the cabinet construction details and tuning.

 

[Jonazkur]

Saw these on the DIY speakers Facebook group. I think you’ve done a great job.
Will you be able to measure impedance and distortion as well a more comprehensive spin?
It would also be great to know how you designed the waveguide and also the cabinet construction details and tuning.

Im planning to make spinorama later. I just ordered dayton dats so soon i can measure the precise impedance too. I know so little about the distortion measurements tho maybe with some help i can take those too. Waveguide is somasonus 8" so i didnt design it. Box is made from 30mm birch plywood and its 52l with 3" aeroport. Dont really know the precise tuning frequency but i calculated it 33hz.

 

[Jonazkur]

Well made DIY speakers! Damn nice waveguide and nice round baffle corners.

It shows that it is possible to make good two-wave speakers with the combination of an eight-inch bass driver and a one-inch tweeter. Prerequisite then; the right type of tweeter, sb26adc in your case, which can be set with a relatively low crossover point together with a waveguide.
Then you have a pair of DIY speakers that measure and sound better than these commercial two-way floor standing speakers with eight inch bass and one inch tweeter in the threads below. Actually, it's not that strange because they lack everything I mentioned yours have:

Audio Note speakers

What's the deal with Audio Note speakers ? They have so many models and they're not exactly cheap (can cost over $100K) And it seems they're "legendary " speakers on other audiophile forums. What's so special about them ?

audiosciencereview.com

Tekton M-Lore Speaker Review

This is a review, listening tests, equalization and detailed measurements of the Tekton (Mini) M-Lore speaker. It is on kind loan from a member and costs $US 750 a pair. As you see, this is a mini-tower speaker if there is such a thing. I had to put a 6 inch stand under it to get the tweeter...

audiosciencereview.com

Edit:
Peerless hds 830869 seems to have break up modes around 3 kHz.It appears to be a 7 dB peak if you check the FR measurement below.
Do you have a notch filter in your crossover to take that peak down? Or maybe you don't hear it? A notch filter is therefore not needed for you.
View attachment 406835

Peerless 830869 | HiFiCompass

hificompass.com

I have pretty steep filter from 1500hz. I didnt saw that peak in any of my measurements when i measured the drivers individually and together.

 

[DanielT]

It was not a criticism of you. Just something I saw on Hificompass. I don't know how they measured to get that result. The essential thing is that you did not see, or measure that it was so.

Damn, nice to see a floorstanding speaker with eight inch bass drivers measuring so well. Actually so good so I'm posting this thread in the threads I mentioned in my post above.

 

[Ktacos]

Great work, impressive for your first diy speaker, you've done your research it seems.

 

[OldHvyMec]

Nice work, I like the fact that you're using ply.

People can say what they want, getting panels straight (after rounding them), looking good with Bondo, spot filler, surface primer, primer, sealer, and then on to paint
is a lot of friggin' work.

I'm an L-Pad guy. Maybe that's an option vs swapping resistors to lower db levels.

Regards

 

[DanielT]

Nice work, I like the fact that you're using ply.

People can say what they want, getting panels straight (after rounding them), looking good with Bondo, spot filler, surface primer, primer, sealer, and then on to paint
is a lot of friggin' work.

I'm an L-Pad guy. Maybe that's an option vs swapping resistors to lower db levels.

Regards

Undeniably a lot of woodwork. Time together with patience and perseverance is one of the biggest advantages a DIY has.

So it's just for a DIY to say:

...and to have creative joy in connection with the process. The three ...
Nobody expects the (DIY) Spanish Inquisition!

 

[Jonazkur]

Hello! Made a little tweak to tweeters crossover and now the high freq rolloff looks better and dont roll off so early. Here is horizontal measurements from on axis to 90 degrees.

 

[Matt_Holland]

Hello! Made a little tweak to tweeters crossover and now the high freq rolloff looks better and dont roll off so early. Here is horizontal measurements from on axis to 90 degrees.View attachment 406933

Dispersion looks excellent!

What’s causing the dip at 400-500Hz? I guess that’s room related?

 

[Jonazkur]

Dispersion looks excellent!

What’s causing the dip at 400-500Hz? I guess that’s room related?

Its the room i guess. In my other bigger room i dont have that dip at all. It just sucks to move my pc and amps and speakers up and downstairs so i just made my early measurements in tighter Space

 

[Jonazkur]

Dispersion looks excellent!

What’s causing the dip at 400-500Hz? I guess that’s room related?

moved the speaker little bit and got rid of that 400 - 500hz dip so it was room related but now there is other peaks and dips higher . I will post some better measurements when i go downstairs. Here is picture also from non gated inroom measurement. All measurements are taken at 1m distance.

 

[Ktacos]

Quite impressive off axis performance, might make me jump back into DIY even.

 

[Jonazkur]

Other box is now painted with black primer. Havent decided the final colour yet any suggestions? The boxes turned out great imo just like i planned.