He does, but I'm still waiting for an ultra-minimalist class D amp (on a chip) that delivers about 20 watts per channel.
https://reconingspeakers.com/products-page/jbl-horn-lens-5006815-stx825/ no EQ is needed, good to below 1500hz, I cross at 1500 .And have used a B&C ME 90 clone with good results.
I made a post 15 yrs ago about chamber resonances on AudioAssylum for the BMS 4592nd regarding connected chambers and blocking them with a washer.
There is a chamber for the speaker terminal that pokes through into a driver chamber and blocking it off hade a small but perceivable difference
on my BD horns. Many golden ears felt it was on par with the TAD. It is good to see the BMS units still to date scoring high.
https://db.audioasylum.com/mhtml/m.....mpl?author=alon5rev3&forum=ALL&sortRank=None
There is a chamber for the speaker terminal that pokes through into a driver chamber and blocking it off hade a small but perceivable difference
on my BD horns. Many golden ears felt it was on par with the TAD. It is good to see the BMS units still to date scoring high.
https://db.audioasylum.com/mhtml/m.....mpl?author=alon5rev3&forum=ALL&sortRank=None
Takes me straight to it. I'll cut and paste but no pics anymore .
- Posted by DHTME4 on June 14, 2007 at 19:30:39
In Reply to: To BMS 4592 ND owners re crossover caps posted by Ian L on June 14, 2007 at 08:40:43:
RE: I would love to hear more about the BMS mod!
- Posted by DHT 4 ME (A) on June 14, 2007 at 23:34:10
In Reply to: I would love to hear more about the BMS mod! posted by PK on June 14, 2007 at 23:15:27:
I know, I married these drivers ;-) when they were introduced in the Netherlands. Once you get the crossover correct for your horn, it is great. I did not do the mod yet, but maybe I should.. I am not used to open compression drivers but it seems easy enough.
Personally I quite like the JBL #5006219 (70° × 70° nominal).
If you look at the shaded area in the mouth (towards the throat) you get an idea of the polar response.
The knuckles limit the horizontal expansion of the wavefront, while the vertical planes resemble a radial horn.
JBL STX812M:
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Try one based on this chip:
https://www.infineon.com/cms/en/pro...tegrated-class-d-audio-amplifier-ics/ma12070/
I use it in I2S (MA12070P) version for 2way active with DSP.
Hello,
The JBL 5006815 PT wave guide is 90 X 50, I sometimes us it on top of my large speaker stack.
I use the JBL 5006815 WG with the D2 D2430H compression driver. The dual diaphragm driver is smoother to me than the other choices.
The phase plot has like 3 peaks, typical of many horns. The saw tooth plot is normal for horns and CD's. The plot has no curve fitting and smoothing turned off. The top octave is much smoother than the other choices. N ripples at the top end. The Voice Coils are wired in parallelThe dual diaphragms do not breakup like the 3 and 4 inch diaphragms do.
Thanks DT
This may be easier on the eyes. 1/12 octave smoothing.
Veryvery nice setup! Do I recognize Hashimoto trannies? There is one thing you can do: remove the glass coffeetable for serious listening and maybe put a carpet on the floor before the speakers. If there is a spouse involved, forget it 😉
Very nice setup, are you happy with the HF? Seems you are bi-amping, if yes, how are you doing your XO, active or DSP?
I friend wants to build a HE 2/3-way and we have been thinking of mating the RCFs in the 1.4" version (or the SBA 65CDN-T) @ ~700Hz to a Precision Devices PD.152.002 (some other interesting options from PD too, like the PD153ER):
PD.152.002
Fs 38 Hz
Re 5.6 Ω
Qms 4.03
Qes 0.265
Qts 0.249
Le (@ 1 kHz) 1.28 mH
Vas 263 Litres
Mms 67.14 g
Sd 853 cm2
Cms 254.40 μm/N
BL 18.90 T/m
Xmax 6.75 mm
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the Hashimoto amps have an amorphous Monolith magnetic output transfo and interstage , but i can't use it for the moment as it have too much gain , so i use the smaller one with only a lundhal stepup transformer and a 300B with a Tango output transformer . ( Sakuma copy ) for the carpet i think there is no way it can happen one day 😊 all the amps and electronic are not direct on glass but on sobothane feets ..
i use the RCF ND850 2inch so the extreme highs are not as clean as with a dedicated tweeter but there others advantage to stay in two way.
i use an tweaked BMS and the crossover is at 550hz between the TAds and the Horns . i have hesitate a long time to keep the M2 JBL 2216ND but the TAd is easyier on the choice of the amp .
previous version of my M2 hybrid
i use an tweaked BMS and the crossover is at 550hz between the TAds and the Horns . i have hesitate a long time to keep the M2 JBL 2216ND but the TAd is easyier on the choice of the amp .
previous version of my M2 hybrid
