I would say I agree with your assessment. "Gimmicks" don't work. You gotta be able to MOVE AIR.
GO BIG and get it right 🙂
Attachments
Well,
if you are happy with this configuration, go with it.....
Wait a minute. You use your lower midrange horn above 50hz ?? And hear no coloration ?
And what is your next move ?!!
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How can I hear coloration if theoretically there is no coloration ?
Depth of my horn is 0.5m, so you can easily calculate, that it corresponds to 680hz, so from 680hz we'll have reflections, but at frequencies lower than 680hz wave length is longer than horn! And in my case it works till 400hz (wavelength 0.85m), so there is no any reflections inside. Horn works as pure transformer.
I hope that it is clear.
My next move is only upgrade AER. Now I have BD1B and I've just ordered BD3. But also I got unique offer from AER to buy their top drivers BD4 which they only use for their top speakers and not selling separately. Imagine, that sensitivity of BD4 is 119db in free air without horn! Incredible efficiency! This is best performance in the world, I believe! But also extremely expensive, so I'm going to sell my GOTO drivers. BTW, if someone interested, I have a good collection 🙂
17P
17FRP
16TT
555F
505TT
370DX
570BL
3770BL
188BL
It's not. They are either quoting it at something other than 1 watt or they're wrong. The only other way would be to get significant directivity, but it if it's without a horn, then they're not doing that.
2.320 € BD1 and 3.880 € BD3 have (about) the same eta (2.5%), Bl, Mms, Re, but sensitivity 103 and 106 respectively 😕 🙂
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The impedance coupling to my room is better suited by a closed 85 liters box because of its the size (9m²)
It gives me a flat response at the center of the room and d'ont go lower than small drivers but the rendenring is vastly superior in term of definition, impact and resolution...
Sound velocity is the key, it is not easy to catch the air with a slow motion.
I had BD3 and BD1 in my home for a month and from what I heard, I think you'll be (very) disappointed by the sound of BD3. BD1 is more natural sounding.
Ask Filip how he "achieved" that efficiency (I already did that over the phone) and you may be "surprised" by his answer.
As soon as Murata tests the BD4 , and you tell him that XXXX which you tested as well beats the AER BD1 and BD4, our friend will have no peace until he tests your new recomendation too.
Haralanov, you do not want Murata keep in suspense, do you ??!!
Has Issues
While I have not audited this system, I suspect it will deliver suboptimal performance for its price point. Here are some reasons:
The Kluge:
dated whizzer cone technology [1] married to horn loaded Goto Unit CD.
The BD4 with its advertized flat on-axis frequency response should not require support from an additional compression driver. The reason for its use probably has to do with maintaining a wider radiation pattern at higher frequencies. Two good horn loaded compression drivers alone can get this job done to any degree of perfecton your pocketbook can afford.
Caveat Emptor:
In audio marketing beware of two things:
1) the amount of money they want and
2) what they are NOT "crowing" about.
[1] Whizzer Cone Technology
implements a mechanical crossover between two concentric radiating surfaces driven by a common motor. At lower frequencies they vibrate together as a single unit, at higher frequencies only the whizzer alone vibrates. Front loading this arrangment with a horn is contraindicated.
Regards,
WHG
I think that this is better design 🙂
While I have not audited this system, I suspect it will deliver suboptimal performance for its price point. Here are some reasons:
The Kluge:
dated whizzer cone technology [1] married to horn loaded Goto Unit CD.
The BD4 with its advertized flat on-axis frequency response should not require support from an additional compression driver. The reason for its use probably has to do with maintaining a wider radiation pattern at higher frequencies. Two good horn loaded compression drivers alone can get this job done to any degree of perfecton your pocketbook can afford.
Caveat Emptor:
In audio marketing beware of two things:
1) the amount of money they want and
2) what they are NOT "crowing" about.
[1] Whizzer Cone Technology
implements a mechanical crossover between two concentric radiating surfaces driven by a common motor. At lower frequencies they vibrate together as a single unit, at higher frequencies only the whizzer alone vibrates. Front loading this arrangment with a horn is contraindicated.
Regards,
WHG
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Filip says that he didn't remember speaking to Haralanov and definitely never sent BD1 or BD3, so interesting what experience he really had.
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I agree with this statement. After experimenting with 300hz and 400hz horn, I put it in 550hz with almost no depth, so it is actually small buffle
A Whizzer is already a horn by itself
May be in my case 300-500hz preferrable from GOTO because 6" diaphragm in 120hz horn has much less excursion, than 8" in smaller horn.