First trials of active horn speaker

[DasguteOhr]

This is not the driver on the 18 sound horn. On the 18 sound horn or wooden Tractrix I use the Beyma CP755TI.

OK. then I misunderstood. but the problem of impedance peaks also exists there. every amplifier without feedback has these problems.

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[bonzo75]

All been discussed previously in the thread.

so if they are different specs why aren’t you specifying that and misrepresenting purposefully

 

[morricab]

so if they are different specs why aren’t you specifying that and misrepresenting purposefully

Sorry, what am I misrepresenting?

 

[morricab]

OK. then I misunderstood. but the problem of impedance peaks also exists there. every amplifier without feedback has these problems.

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They measure flat, so not a big issue.

 

[bonzo75]

Sorry, what am I misrepresenting?

you have to do like for like. If the cut off frequencies of the two horns are different where the driver cut off is closer to the cut off of the horn, and the throat size is different, you can get nasality

 

[morricab]

you have to do like for like. If the cut off frequencies of the two horns are different where the driver cut off is closer to the cut off of the horn, and the throat size is different, you can get nasality

Throat size is the same (1.4 inch). What ARE you talking about?? I have three basic setups in this system. 1) wooden Tractrix with Beyma CP755TI crossed at either 1800 hz or now 800hz. 2) 18 sound XT1464 with Beyma CP755TI at 1800 or 800(haven’t tried this at 800 yet). 3) Iwata 600 with Beyma CP350TI crossed at 1800.
Only 3 is a smaller throat and higher cutoff and so I don’t use it down at 800. It also doesn’t have a nasality issue. It’s very clean sounding.
Only 2 has a bit of nasality that is only heard on a few recordings. This was at 1800 hz and previously at 1000 hz when I used the digital xover. I haven’t tried it at 800hz with Accuphase yet.

 

[bonzo75]

Throat size is the same (1.4 inch). What ARE you talking about?? I have three basic setups in this system. 1) wooden Tractrix with Beyma CP755TI crossed at either 1800 hz or now 800hz. 2) 18 sound XT1464 with Beyma CP755TI at 1800 or 800(haven’t tried this at 800 yet). 3) Iwata 600 with Beyma CP350TI crossed at 1800.
Only 3 is a smaller throat and higher cutoff and so I don’t use it down at 800. It also doesn’t have a nasality issue. It’s very clean sounding.
Only 2 has a bit of nasality that is only heard on a few recordings. This was at 1800 hz and previously at 1000 hz when I used the digital xover. I haven’t tried it at 800hz with Accuphase yet.

well, you said to go back and read the thread, I didn’t want to, so I had to write something to make you summarise it

 

[Argonaut]

Brad , Do you feel that this slight and occasional “nasality” might be a product of the Injection moulded polyurethane XT1464 as apposed to the Fibreglass construction of the Iwata 600 ( comparatively more dense /inert perhaps ? )

 

[bonzo75]

Brad , Do you feel that this slight and occasional “nasality” might be a product of the Injection moulded polyurethane XT1464 as apposed to the Fibreglass construction of the Iwata 600 ( comparatively more dense /inert perhaps ? )

can you please state the process to isolate this, as compared to bringing out the resonating wood colourations? How many combinations of drivers, crossovers, and material of same shape and cut off to verify this?

 

[Argonaut]

can you please state the process to isolate this, as compared to bringing out the resonating wood colourations? How many combinations of drivers, crossovers, and material of same shape and cut off to verify this?

No.

 

[bonzo75]

No.

i didn’t expect one.

 

[Argonaut]

i didn’t expect one.

As In No I can’t be bothered … My post being a querry to Brad as he may have already considered this as a possible correlation for his anomaly .

 

[bonzo75]

As In No I can’t be bothered … My post being a querry to Brad as he may have already considered this as a possible correlation for his anomaly .

No you were purposefully leading incorrect conclusions

 

[Argonaut]

No you were purposefully leading incorrect conclusions

I was asking Brad whether he had considered the plausibility, whilst offering no conclusions of my own.

 

[morricab]

Brad , Do you feel that this slight and occasional “nasality” might be a product of the Injection moulded polyurethane XT1464 as apposed to the Fibreglass construction of the Iwata 600 ( comparatively more dense /inert perhaps ? )

I would have to damp it and see if what I heard goes away. To be honest it is quite minor in absolute terms and not a serious “honk “ like one thinks of from vintage horns.

 

[morricab]

No you were purposefully leading incorrect conclusions

Honestly, have you lost your mind? You accuse me of misrepresentation of…something and now say Argonaut is purposefully leading me to incorrect conclusions…by asking me a question?? No one owes you anything in the way of explanation and it’s not even clear why you care enough to behave so poorly.

 

[bonzo75]

Honestly, have you lost your mind? You accuse me of misrepresentation of…something and now say Argonaut is purposefully leading me to incorrect conclusions…by asking me a question?? No one owes you anything in the way of explanation and it’s not even clear why you care enough to behave so poorly.

Nasality due to material with no consideration to throat size and cut off and profile Is ridiculous unless you want to pedal only wooden horns

 

[Solypsa]

A quick test with regards material would be to coat the outside with a 'plasti dip' type coating. I am NOT saying this will make it sound better, but it should sound different ( if material is culprit ) and it is also easily removable.

 

[christensenleif@msn.com]

nasality often occurs in driver horn combos where the driver is forced to operate outside it´s comfort range
horn material is not part of that equation

 

[bonzo75]

To be honest it is quite minor in absolute terms and not a serious “honk “ like one thinks of from vintage horns.

Your lack of experience is shining through like the tone from a wooden horn. Or is it plastic? Either way like one where the driver and horn cut off is the same.

Is this the same technical understanding based on which you said the horning TT and American sound are similar design