sorry about no-metric on Greg B's plan
here's one small coupler I like - it sounds good with Beta8cx, Visaton BG20, and WBAL Betsy
Here's a Karlson coupler for Beta 8cx
here's one small coupler I like - it sounds good with Beta8cx, Visaton BG20, and WBAL Betsy
Here's a Karlson coupler for Beta 8cx
X, I read almost the whole Thread and I´m going for it, unfortunetly in my country is very difficult to import speakers but I found 3FE25 8ohms and 4FE35 8ohms in a reseller...
in this situation, which model would you recomend? 0.6x dual 4FE35 8ohms / 0.53x dual 3FE25 8ohms or 0.4x 3FE25 ohms??
in this situation, which model would you recomend? 0.6x dual 4FE35 8ohms / 0.53x dual 3FE25 8ohms or 0.4x 3FE25 ohms??
Based on Vas differences alone, scale by 0.64x for dual 4FE35-16. It should work well at this scaling.
If you use dual 4FE32-16 (smaller Vas) the 0.60x scaling can be used. These are Nd magnet drivers and cost a bit more though.
I would recommend the 4FE32-16 as the Qts is smaller and closer ideal value. I should run a simulation though to be sure.
If you use dual 4FE32-16 (smaller Vas) the 0.60x scaling can be used. These are Nd magnet drivers and cost a bit more though.
I would recommend the 4FE32-16 as the Qts is smaller and closer ideal value. I should run a simulation though to be sure.
Last edited:
Hi XRK,
Getting a pair of 15" FR from China for my first big project. TS parameters provided as follows:
It is a new 15" FR by Correct HiFi sold from China
TS:-
60w, 98.2dB, Qts =0.468
Xmas n.a.
Sd 22.698
Fs 24.23
Vas 136.557
Qms 2.645
Qes 0.573
Mms 24.298g
Re 6.5ohm
Le n.a.
Bl 4.616
I have shortlisted a K15 or Karlsonator 15 for it but not sure if this driver is compatible.
Would appreciate if you can run a sim for it and advise accordingly.
Kind regards
Getting a pair of 15" FR from China for my first big project. TS parameters provided as follows:
It is a new 15" FR by Correct HiFi sold from China
TS:-
60w, 98.2dB, Qts =0.468
Xmas n.a.
Sd 22.698
Fs 24.23
Vas 136.557
Qms 2.645
Qes 0.573
Mms 24.298g
Re 6.5ohm
Le n.a.
Bl 4.616
I have shortlisted a K15 or Karlsonator 15 for it but not sure if this driver is compatible.
Would appreciate if you can run a sim for it and advise accordingly.
Kind regards
a 15 inch typically would have Sd ~880 cm2. Mms seems too low too. A modern "Jensen" 12" guitar speaker with fs ~87 and 1.25" diameter coil comes in around 25g mms. Would you have a picture of the driver to upload to see if its offered by other names ? (Lil F15? crazy specs too)
One Pair | Recommended 15" Full Range Speaker Driver | Fast High and Scaled Sound | F-15 - Lii Audio, unique speaker, amplfier, quality and cost-saving parts for HiFi DIY
One Pair | Recommended 15" Full Range Speaker Driver | Fast High and Scaled Sound | F-15 - Lii Audio, unique speaker, amplfier, quality and cost-saving parts for HiFi DIY
(wonder if XRK971 thinks about audio projects on holidays 
)
here's some perhaps pure fantasy tripled fudged sims based on the black trace of that impedance curve.
Here's the dimensions for Acoustic's little 115BK cabinet. Internal width is 19 inches. Scale 115BK by 1.2X and its
roughly the bulk of K15 and tuned a bit lower. 1.2X size would roughly be 32" high by 16" deep by 24" wide. I think
K would do roughly the same - so the first sim is my guess of how this high end FR15 "might" play in K15.
https://i.imgur.com/z4L1Lob.jpg
)here's some perhaps pure fantasy tripled fudged sims based on the black trace of that impedance curve.
Here's the dimensions for Acoustic's little 115BK cabinet. Internal width is 19 inches. Scale 115BK by 1.2X and its
roughly the bulk of K15 and tuned a bit lower. 1.2X size would roughly be 32" high by 16" deep by 24" wide. I think
K would do roughly the same - so the first sim is my guess of how this high end FR15 "might" play in K15.
https://i.imgur.com/z4L1Lob.jpg
Last edited: