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Multi-Way Conventional loudspeakers with crossovers

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Old 20th February 2013, 08:54 PM   #101
mitchba is offline mitchba  Canada
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Quote:
Originally Posted by charly chile View Post
That looks pretty sharp.
How much tube power do you have per channel?
I guess you are using only one stereo amplifier.
Thanks. Yes, one stereo amp. It is a DIY Nelson Pass A40 that I put into three chassis to look similar to the Dynaco ST-70 tube amp. It's 40 watts of Class A per channel.
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Old 20th February 2013, 09:19 PM   #102
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Quote:
Originally Posted by Helmuth View Post
some low cost HF drivers.


BMS 4554 1,4" $202,-
Faital PRO HF144 1,4" $298,-
Eighteensound HD1480T $312,-
For BMS the 4550 1" would be a better selection than the 4554, 1.4"
The 4550 will crossover lower.
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Old 20th February 2013, 09:28 PM   #103
mitchba is offline mitchba  Canada
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Originally Posted by Helmuth View Post
I personally like the brightness of a metallic dome. IMO harness comes bad from wiring poor capacitors and wire wound resistors in the cross over.

Again do not judge to early when you not did enough crossover work. Try other capacitors metal oxide resistors and try copper wire in different gauge or tinned copper. And silver plated copper and carbon or carbon copper wire.

I had a huge tuning difference with the bi-wire set by testing different loudspeaker wires.
Hi Helmuth, I think Mr. Crites makes some pretty good xovers with Sonicaps... Or at least in my research, I have not come across anyone complaining about them.

My comment is based on the 1" Selenium D220Ti, which sounds harsh to my ears and measures higher distortion than the CP27 driver that I just put in my system and changed nothing else.

Attached are two distortion measurements with the only change being the 1" compression drivers. As mentioned, they xover at 5 kHz. There is a big rise in distortion at 6 kHz on the D220Ti compared to the CP27. It is quite audible.

Maybe I got a bad batch of 220Ti, or this is the way they are, I don't know...

I am looking forward to installing the BMS 4540ND to see what they sound like and measure.

Cheers!
Attached Images
File Type: jpg d220ti distortion.jpg (149.4 KB, 333 views)
File Type: jpg cp27 distortion.jpg (148.4 KB, 326 views)
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Old 20th February 2013, 09:56 PM   #104
Helmuth is offline Helmuth  Netherlands
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Quote:
Originally Posted by mitchba View Post
Hi Helmuth, I think Mr. Crites makes some pretty good xovers with Sonicaps... Or at least in my research, I have not come across anyone complaining about them.

My comment is based on the 1" Selenium D220Ti, which sounds harsh to my ears and measures higher distortion than the CP27 driver that I just put in my system and changed nothing else.

Attached are two distortion measurements with the only change being the 1" compression drivers. As mentioned, they xover at 5 kHz. There is a big rise in distortion at 6 kHz on the D220Ti compared to the CP27. It is quite audible.
When they distort the cause is clear
Quote:

Maybe I got a bad batch of 220Ti, or this is the way they are, I don't know...

I am looking forward to installing the BMS 4540ND to see what they sound like and measure.

Cheers!
I own a pair of bms 4540. They are good but in the long run I did not like them enough a bit to thin.

A popular 1" is the RCF cd350 polyester.
RCF - CD350

I had the chance to test the DE25 very nice clear sound on janzen superior-Z.
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Last edited by Helmuth; 20th February 2013 at 09:58 PM.
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Old 21st February 2013, 05:24 PM   #105
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I was reading more about the Cornscala design.
Have a fun club, people says have good bass performance of Klipch Cornwall, and good mid high qualities of La Scala.
It's a >100db design. My amplifier has 0.7W with 71A and 1.5W with 45 so sensitibity is very needed.

To be honest, it's a bulky design, is harder to make it look nicer.
I am thinking about starting my own project (not an identical copy) based on the general aproach of the Cornscala.

1. Use my Eminence Omega 18A Pro in a Bass reflex config. front vented.
2. Put the horns outside the enclosure, probably this reduces coupling, but in really I think it will look better and can make it modular, so will be easier to change components.
3. I will look for the tweeter later, It could be the 2405.
4. So the Job now is to define what wooden horn and what compression driver should I use.

Note1: Eminence Omega 18A pro, doesnt have 100db. And my understanding is that a BR only will give more bass extension. At the moment I will think on attenuating more the highs, until I get a better bass. But I still would like to think in options for the bass, to start planning ahead.

Note2: I have a pair of 41hz SS 20W and 100W amplifier, another option would be use that for the woofer. I m just afraid of loosing phase integrity when using two amplifiers.

Please let me know any concerns about this thinking.
Best,
Charly

Last edited by charly chile; 21st February 2013 at 05:29 PM.
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Old 21st February 2013, 05:38 PM   #106
Helmuth is offline Helmuth  Netherlands
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acitve low is a good thing mid high is better passive imo.
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Last edited by Helmuth; 21st February 2013 at 05:57 PM.
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Old 21st February 2013, 05:45 PM   #107
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by Helmuth View Post
..... mid high is better passive imo.
but still very difficult
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Old 21st February 2013, 05:49 PM   #108
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Originally Posted by tinitus View Post
but still very difficult
Hi Tinitus,
What would be the things to check to make that work?
Best,
C.
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Old 21st February 2013, 05:54 PM   #109
tinitus is offline tinitus  Europe
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I would like to
but sorry, I have to say... if I could tell you like this it wouldnt be difficult

your eminence woofer/sub thing sounds ok, it will be fine, build that, no problem

and then you could try any 2way
maybe eminence Beta8 with a smaller tweeter
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Old 21st February 2013, 06:02 PM   #110
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Originally Posted by tinitus View Post
I would like to
but sorry, I have to say... if I could tell you like this it wouldnt be difficult

your eminence woofer/sub thing sounds ok, it will be fine, build that, no problem

and then you could try any 2way
maybe eminence Beta8 with a smaller tweeter
can that sound better than horns?
remember everything started with the idea of having CDs and Horns.
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