Without too much written nonsense, i am listening for a few months these small two way and i thought that i should share. Maybe someone finds it useful. There are few pics on the forum, but i thought that it deserves it's thread.
Driver's being used are Seas L15RLY/P and Morel CAT308 in Visaton WG148R. Here are some measurements (thanks to Cédric from justDIYit.com ):
These are my measurements of loudspeakers mounted on the baffle. First one is the tweeter without and with waveguide, second are midwoofer and tweeter and dimensions of the baffle are on the third image:
LspCAD sim:
This is how the tweeters are mounted on the waveguides. Since Morel has flat aluminium front plate, it went quite smoothly:
One pic of ugly test box:
And few of slightly better looking finished:
Few measurements are in order - done with HolmImpulse, chirp, calibrated ECM8000 and m-audio fast track from 1m distance:
On axis - horizontal, at 45deg and at 67,5deg:
The same as up only with 90deg instead of 67,5deg.
Impulse response:
Measured impedance:
And finally the crossover, impedance and phase:
R1 should be at least 10W resistor, and if used with subs, then at least 20W. I didn't use impedance flattening circuit but there it is for the ones who think it is needed. Interestingly, one tweeter was a bit louder than the other (about 0,5dB) across the spectrum so i ended up with 5,1 ohm series and 5,6 shunt on one tweeter and on the other 5,6 series, 5,1 shunt. That being fixed i measured them to see if there is a difference between them. I got this:
Pretty low xover point made the breakup quite irrelevant. They sound great to me but (unless used with subs) they are not for large rooms. Mine is about 20sq meters. I was in a bit of dilemma - should i post this or not. Zaph removed the project that uses L15 midwoofer from his website because of his ZA14 two way saying that at the price of this midwoofer there are better options these days. Maybe he is right but i recently built a two way using SB17NRXC35-8 and SB29RDC-C0004. While the tweeter sounds great, SB17 just doesn't. I don't care how much lower the distortion is in SB17 compared to L15 but Seas sounds much much better. SB goes deeper ofc, but Seas has more articulate bass, more detailed and precise midrange. Both have similar (1700Hz was for SB drivers) xover frequency but the little Seas is much better in almost every aspect. So, even SB17 is cheaper and measures better regarding distortion and is quite popular these days, it sounds worse and that is one of the reasons i posted this project. I don't expect people to buy this midwoofer just to make this but if you bought it long time ago (like i did) for whatever reason and it sits unused somewhere, you should try this. You just might be surprised.
These, for instance, cost quite a lot and i just don't like how they measure.
Driver's being used are Seas L15RLY/P and Morel CAT308 in Visaton WG148R. Here are some measurements (thanks to Cédric from justDIYit.com ):
These are my measurements of loudspeakers mounted on the baffle. First one is the tweeter without and with waveguide, second are midwoofer and tweeter and dimensions of the baffle are on the third image:
LspCAD sim:
This is how the tweeters are mounted on the waveguides. Since Morel has flat aluminium front plate, it went quite smoothly:
One pic of ugly test box:
And few of slightly better looking finished:
Few measurements are in order - done with HolmImpulse, chirp, calibrated ECM8000 and m-audio fast track from 1m distance:
On axis - horizontal, at 45deg and at 67,5deg:
The same as up only with 90deg instead of 67,5deg.
Impulse response:
Measured impedance:
And finally the crossover, impedance and phase:
R1 should be at least 10W resistor, and if used with subs, then at least 20W. I didn't use impedance flattening circuit but there it is for the ones who think it is needed. Interestingly, one tweeter was a bit louder than the other (about 0,5dB) across the spectrum so i ended up with 5,1 ohm series and 5,6 shunt on one tweeter and on the other 5,6 series, 5,1 shunt. That being fixed i measured them to see if there is a difference between them. I got this:
Pretty low xover point made the breakup quite irrelevant. They sound great to me but (unless used with subs) they are not for large rooms. Mine is about 20sq meters. I was in a bit of dilemma - should i post this or not. Zaph removed the project that uses L15 midwoofer from his website because of his ZA14 two way saying that at the price of this midwoofer there are better options these days. Maybe he is right but i recently built a two way using SB17NRXC35-8 and SB29RDC-C0004. While the tweeter sounds great, SB17 just doesn't. I don't care how much lower the distortion is in SB17 compared to L15 but Seas sounds much much better. SB goes deeper ofc, but Seas has more articulate bass, more detailed and precise midrange. Both have similar (1700Hz was for SB drivers) xover frequency but the little Seas is much better in almost every aspect. So, even SB17 is cheaper and measures better regarding distortion and is quite popular these days, it sounds worse and that is one of the reasons i posted this project. I don't expect people to buy this midwoofer just to make this but if you bought it long time ago (like i did) for whatever reason and it sits unused somewhere, you should try this. You just might be surprised.
These, for instance, cost quite a lot and i just don't like how they measure.
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