I have never designed a Karlsonator for a 10F/8424. That driver is really meant to be used in an open face speaker or front horn. It's Qts is rather low so a Karlsonator may not have as deep bass extension as say a TG9FD. Also fiberglass and similar signature. Let me to see what I can come up with.
@Bigun regarding a front chamber for a 15, Karlson's X15 with ~28 liter front chamber was sufficient to work. That little K-coupler is a very good alternative to a front loaded midbass horn (assuming sufficient watts as only ~100dB sensitive)
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Ive read comments about accuracy, is the challenge with the K about flat response, phase, uneven dispersion??
I also have a question about positioning. Does the K prefer to come forward into the room, or does it like to stay close to the wall? Thanks!
Placed away from wall there is less boomy bass and better imaging. Near a wall can sound good though if elevated on stands.
That's a great little driver. Looking forward to reading what you think of it in the little Karlson.
X, are you using single 3FE25 in a 0.4X, or dual in a 0.53X like you suggested in another thread?
X, I see the 3FE25 comes in a 4 ohm as well. If you put two 4 ohm drivers in series, what happens to the sensitivity?
I am asking in view of the ACA amp that might not cope well with 4 ohm speakers.
I am asking in view of the ACA amp that might not cope well with 4 ohm speakers.
Drops, so not what you want. I bet it drives 4ohms just fine - those beefy IRFP240's we have there... Maybe distortion goes up since this is a SE Class A amp?
Check out this new 0.53x dual 3FE25 from Skylar88. Should be good for 97dB at 2.83v!
http://www.diyaudio.com/forums/atta...11-aca-speaker-short-list-karlsonator-053-pdf
http://www.diyaudio.com/forums/atta...11-aca-speaker-short-list-karlsonator-053-pdf
Sweet 97dB!
Even with 1x TC9FD in 0.4 I get them to play pretty loud. 🙂
What is the estimated efficiency in this configuration? Thank you.
Even with 1x TC9FD in 0.4 I get them to play pretty loud. 🙂
What is the estimated efficiency in this configuration? Thank you.
Two 91dB drivers in parallel is +6dB at same drive voltage. It is using double the power since 4ohms.
I'm not after extremely loud volume. It's for personal listening in a lounge - at decent sound levels, but loud enough to appreciate every aspect of the recordings (flac).
Thus, my aim is to get the best quality sound (within the constraints of the ACA's 5/6W per channel). Therefore, I need your honest opinion, X: Would 4ohms or 8ohms give me that? I.o.w. 2x16ohms parallel or 2x8ohms parallel?
Thus, my aim is to get the best quality sound (within the constraints of the ACA's 5/6W per channel). Therefore, I need your honest opinion, X: Would 4ohms or 8ohms give me that? I.o.w. 2x16ohms parallel or 2x8ohms parallel?
Both setups will probably work well. In the end, the choice of dual 16ohms for nominal 8ohms is closer to the nominal impedance rating of the ACA. Since the ACA is a single ended Class A topology, it's distortion will be directly related to the speaker impedance and using nominal 8ohm will result in lower harmonic distortion for the same voltage output. The 4ohm version will be twice as loud for the same voltage drive level. The Qts of the parallel 16ohm is higher and this may actually improve bass extension. So if you think that 15dB gain of the ACA is enough for you given your source.
So I guess upon careful weighing of pros and cons I recommend the dual 16ohm version - you can't really go wrong with it given your stated preference over sound quality vs ultimate high SPL.
Sound good? Now you can order the drivers.
I do recall that I have a pair of 3FE22 (Nd magnet) in 16ohms. They are lovely sounding drivers and very smooth.
So I guess upon careful weighing of pros and cons I recommend the dual 16ohm version - you can't really go wrong with it given your stated preference over sound quality vs ultimate high SPL.
Sound good? Now you can order the drivers.
I do recall that I have a pair of 3FE22 (Nd magnet) in 16ohms. They are lovely sounding drivers and very smooth.
Thank you very much, X.
I feel much happier now, because even with my limited knowledge, that is what I thought would be the better choice for me. 😀
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MK 0.41X in studio
Here's an update on the MK 0.41X's that I built for my buddy's studio. They were installed about three weeks ago. To my ears they are miles ahead of the Event monitors that are already there, especially for mixing purposes. They won't play as loud, but I prefer less levels anyway to combat ear fatigue. The studio owner's initial comment "wow, they are really bassy" which I suppose is true considering their size. But they do not produce a bloated bass. He subsequently used them to check a mix and was very impressed. The real plus is that the midrange on the MK's is very clean and easy to differentiate instruments. On the Events it's just a big hodgepodge mush of guitars, keys, vocals, drums and cymbals that make it torture (for me anyway) to get a good mix. There is a ceramic tile on each MK to weigh it down (helps with the upper bass region ~125Hz) as well as a second front wing on each (liquid nailed onto the original wing) for the same reason. These are a second set; the first set I use daily at my computer for hours on end, going on two months now. I haven't listened to music this much in years. They are totally enjoyable. I am about to embark on a set of 0.53X with the Dayton 5" PA full range to use in the main listening room; have them go head to head with a 20 year old scanspeak two way 🙂
Here's an update on the MK 0.41X's that I built for my buddy's studio. They were installed about three weeks ago. To my ears they are miles ahead of the Event monitors that are already there, especially for mixing purposes. They won't play as loud, but I prefer less levels anyway to combat ear fatigue. The studio owner's initial comment "wow, they are really bassy" which I suppose is true considering their size. But they do not produce a bloated bass. He subsequently used them to check a mix and was very impressed. The real plus is that the midrange on the MK's is very clean and easy to differentiate instruments. On the Events it's just a big hodgepodge mush of guitars, keys, vocals, drums and cymbals that make it torture (for me anyway) to get a good mix. There is a ceramic tile on each MK to weigh it down (helps with the upper bass region ~125Hz) as well as a second front wing on each (liquid nailed onto the original wing) for the same reason. These are a second set; the first set I use daily at my computer for hours on end, going on two months now. I haven't listened to music this much in years. They are totally enjoyable. I am about to embark on a set of 0.53X with the Dayton 5" PA full range to use in the main listening room; have them go head to head with a 20 year old scanspeak two way 🙂
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