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Old 9th January 2011, 03:01 AM   #511
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i've build B500 and i like the sound quality,now i want to bulid Ultimate B500 and compare the sound quality.....

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Old 9th January 2011, 12:13 PM   #512
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Originally Posted by QQ12e5k1 View Post
i've build B500 and i like the sound quality,now i want to bulid Ultimate B500 and compare the sound quality.....

Regards
You can compare sound quality runing both amps at 50W, different is only 6dB at full power. I will share pcb for 'Ultimate 500' or AX500 not B500, but I must remove class H step driver from pcb.
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Old 10th January 2011, 05:39 AM   #513
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Hii. Apex...I will waiting next project...AX500..Why..you must remove class H step driver? If this "secret" for commercial product...I understand...
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Old 10th January 2011, 12:25 PM   #514
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Originally Posted by electra_ina View Post
Hii. Apex...I will waiting next project...AX500..Why..you must remove class H step driver? If this "secret" for commercial product...I understand...
With class H step driver that will be HX900
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Old 10th January 2011, 06:23 PM   #515
effebi is offline effebi  Italy
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Originally Posted by atx View Post
Can you explain me why you have C3-R5 (Wahab at beginning had some words) and why D1? Are they necessary ?
I have seen the reply on this post.
But I have a question on the same subject. Coud the amplifier work anyway, altough with a different (shaped) passband, WITHOUT those 3 components? It seems to me a very good design to build but I am afraid of what can happen in case of unwanted clipping.
Thanks
effebi

Last edited by effebi; 10th January 2011 at 06:25 PM. Reason: spelling
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Old 10th January 2011, 06:47 PM   #516
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Originally Posted by effebi View Post
I have seen the reply on this post.
But I have a question on the same subject. Coud the amplifier work anyway, altough with a different (shaped) passband, WITHOUT those 3 components? It seems to me a very good design to build but I am afraid of what can happen in case of unwanted clipping.
Thanks
effebi
AX-14 have perfect clipping behaviour (posts #52, #64... Diy audio popular amps simulations) , don't change anything just use latest schematics.
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Old 10th January 2011, 08:15 PM   #517
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Originally Posted by coolet View Post
hi apex

any replacement for 2SC4793 AND 2SA1837

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coolet
2SA1306/2SC3298
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Old 11th January 2011, 07:51 AM   #518
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Originally Posted by apexaudio View Post
With class H step driver that will be HX900
He..he...which is the best performance H900 or HX900? If HX900 more better than H900...I can say thanks very much if you will share HX900... Or anytime I will waiting schema and lauyot PCB on my email: raveizal@gmail.com
Pozdrav,
Electra_ina
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Old 11th January 2011, 08:13 AM   #519
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Hi Apex Happy New Year,
In pcb the diode D4 and D5 are connected as shown in the schematic... are these correct?
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File Type: jpg APEX AX14sch1.JPG (323.6 KB, 1678 views)
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Old 11th January 2011, 10:51 AM   #520
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Hi Apex Happy New Year,
In pcb the diode D4 and D5 are connected as shown in the schematic... are these correct?
Both connections are correct.
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