Teenage Wall Speaker 50$

[Veke76]

Teen Wall Speaker 59$

Some 5 years ago Audiovideo.fi designed these Teen Wall Speakers. They were ment to match cheap price and quality sound for teenage kids. Price was about 59$. The drivers were from big stock of leftovers.

Kaiutinrakennusohje Teini-seinakaiutin ja Teinijytky-aktiivisubwoofer - AudioVideo

Bassdrivers: Nokia Harman LPT 145/25/100FS
Tweeter: Nokia Harman LPKH 50/10/100 SKF

Now it seems that the big stock has been consumed and I can't advance in my project to build pair of these. Actually the tweeter is missing. Any help to replace it?

The parts came from Kaiutinelementit - Hifitalo

Edit: parts came available and I used those. Teenage Wall Speaker 50$

 

[Veke76]

Would these fit the purpose?

Nokia Harman T77RS050G45 diskantti - Hifitalo

Nokia Harman YG570401S45B / LPH57/93FB diskantti - Hifitalo

 

[Lojzek]

Visaton SC 5-8 appears to be a good replacement.

 

[Veke76]

Thanx. Lets see

Magnetically shielded 13 mm (0.5") polycarbonate dome driver for the high-frequency range above 4000 Hz. Balanced frequency response, excellent omnidirectional sound distribution and high efficiency. Suitable for small sized shielded 2-way combinations for surround center speakers and multi media systems in conjunction with the shielded fullrange driver F 8 SC 8 Ohm.


Technical Data:
Nominal power handling with high pass 60 W (12 dB/Okt.; 6000 Hz)
Peak power handling with high pass 100 W (12 dB/Okt.; 6000 Hz)
Nominal impedance Z 8 Ohm
Frequency response 1500–22000 Hz
Mean sound pressure level 90 dB (1 W/1 m)
Opening angle (-6 dB) 107°/8000 Hz
Resonance frequency fs 2000 Hz
Magnetic induction 0,7 T
Magnetic flux 33 µWb
Height of front pole-plate 2 mm
Voice coil diameter 13 mm
Height of winding 2 mm
Cutout diameter 48 mm
Net weight 0,098 kg
Connections 5,2 x 0,5 mm (+)
2,8 x 0,5 mm (−)

 

[Veke76]

Actually I can do better than the original. Call mine 2020 version using only visaton tweeter and visaton bass driver plus visaton ready made crossover. Price should be 75$ per unit.

This shop seems to be selling visaton
Visaton kaiuttimet ja tarvikkeet - Radioduo.fi verkkokauppa

 

[Veke76]

Teen 2020 ver. by Vesa

Tweeter VISATON SC 10 N 8 OHM 19,64 €
Bassdriver VISATON W 250 8 OHM 45,76 €
Crossover 2-WAY VISATON HW 2/70 NG 8 OHM 26,70 €
Car subwoofer box - bass reflex - 35L - 250MM 53,68 €

all sums up to 290€ for speaker pair...allthough box is for proto

 

[Veke76]

Pictures of what is included

 

[Veke76]

The box is manufactured here

Basser - B1035 subwoofer enclosure

 

[Lojzek]

W250 is truly capable of being crossed that high. Off the shelf filter will be less than optimal but it looks as if you did not care much about that at all. The overall cost is rather high.


edit: My advice is to find a set of second hand Cerwin Vega speakers.

 

[revisorn]

Pictures of what is included

Im sorry but a loudspeaker can not use a ready-made crossover if its going to sound good. The drivers have to be modelled and on/off axis curves must be considered.

 

[Veke76]

I will address and upgrade the crossover at some point and the same goes with the speaker boxes.

Electronical parts cost is 93€ per unit (=cheap)
Proto box costs 54€ per unit (True box for these with nice finish could cost 250€ per unit)

thanx for feedback, it's needed through this project

 

[Veke76]

I see that many are using Visatons BoxSim. Here is a plot how 3000Hz crossover affects drivers response.

 

[Veke76]

Some simulations of the elements combined with 3000Hz crossover.
Any thoughts?

 

[Veke76]

Tweeter polarity needed to invert

 

[Veke76]

Changed to BoxSim 2.0 and therefore same graphs again

 

[Veke76]

I was helped by "erkki1" and he suggested this new crossover

and the plots keep on coming 🙂

 

[Veke76]

Since I won't be using Visatons crossover, I won't order them.
Instead here is a 1557Hz crossover after some rounding up the numbers.
Crossover components seems to be about 20+ € per unit (slightly cheaper than Visatons).

 

[Veke76]

It seems its bad to go below "optimum" 1720Hz so I upgarded crossover components to something that I can order from shop. Now crossover point sets to 1747Hz. BoxSim 2.0 does the optimization automatically, but Its left to you figure out what to order from shop and this can be pretty iterative job. 😉

 

[revisorn]

I was helped by "erkki1" and he suggested this new crossover

and the plots keep on coming 🙂

Erkkki1's crossover suggestion looks good. Off axis is about as important as on-axis. Try to keep the crossover values as intended, dont change them, you can combine parts (caps/coils/resistors) to reach exact values.

Keep the width/height of the baffle and the driver placement on the baffle as erkki1 set the box-parameters in Boxsim.

 

[Veke76]

Erkki1 gave me the crossover electrical plan and suggestion was crossover @2200Hz, but didn't have the box optimimized to it. I learned how to do it and the crossover sets to @1720Hz. Some of component values was pretty close to what shop has to offer. I also tried to keep it simple because variance of the component actual values. I ended up crossover @1747Hz.