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Chip Amps Amplifiers based on integrated circuits

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Old 27th August 2019, 05:37 AM   #3251
Rainwulf is offline Rainwulf  Australia
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Quote:
Originally Posted by freebee View Post
Wow! Really impressed with the builds in this thread! This is my poor man's version of the AudioSector chipamp. Still needs to put in place a soft start circuit and perhaps shielding for chip and dc v-wires. Sound is impressive with lots of detail and solid bass.
Why do you use such small ones to supply power to the modules, and yet thick wires to the speaker terminals?

All the current that flows to the speakers has to come from those tiny wires.
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Old 2nd September 2019, 07:37 PM   #3252
troystg is offline troystg  United States
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Location: In a dream, Please don't wake me...
10 yrs later I pull them out of storage and assemble them with no documentation.

That is a great label job and attention to detail by the seller!

Thanks again Russ for making such an awesome kit.

HUGE, HUGE, HUGE thank you to the dear departed Mauro for sharing his design with us. This is my second pair as I have been enjoying the first for some time but now I need 6 channels for active XO.

P_20190902_132944.jpgP_20190902_132923.jpg1550847505.jpg
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Old 8th September 2019, 08:45 AM   #3253
Prophetmaster is offline Prophetmaster  Russian Federation
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Originally Posted by Idiosyncrasy View Post
This is f-ing amazing.

Love the custom metalwork! How did you go about making it? Also the cooling solution for the buffer ICs.

How do you like it so far?
This amplifier took part in the Exhibition "Russian Hi-End-2018" and received very good reviews.
There are some chances to go to the Exhibition in Munich.There will be auditions on the subject soon.

Photo: the square wave of 100 kHz (in the kitchen) the square wave of 300 kHz and 500 kHz square wave and some stages of assembly. Temperature on copper radiators not more than 50 degrees Celsius.
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Last edited by Prophetmaster; 8th September 2019 at 09:05 AM.
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Old 8th September 2019, 12:55 PM   #3254
quadtech is offline quadtech  India
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Quote:
Originally Posted by Prophetmaster View Post
This amplifier took part in the Exhibition "Russian Hi-End-2018" and received very good reviews.
There are some chances to go to the Exhibition in Munich.There will be auditions on the subject soon.
Wow - looks beautiful!
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Old 8th September 2019, 01:31 PM   #3255
Prophetmaster is offline Prophetmaster  Russian Federation
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Many thanks!!!
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Old 7th October 2019, 07:29 PM   #3256
borninthefifties is offline borninthefifties  United Kingdom
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Had a few of "00940" open source PCBs for the LM3886 made. An open source layout for LM3886? Stuffed them with pretty low spec components. 35v +- PSU. Source is a usb Behringer U-Phoria UM2. Heat sink is a bit OTT, but spare!
Sound pretty good powering a couple of near field monitor speakers.
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Old 3rd November 2019, 11:19 AM   #3257
elektrofon is offline elektrofon
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Hi-Fi inverting amplifier on TDA7293 / 7294 with T-shaped negative feedback.I ordered at the factory
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Old 8th November 2019, 06:38 PM   #3258
Ramdass is online now Ramdass  India
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Default Chip Amps Amplifiers based on integrated circuits

Here is my LM4780 Chip amp integrated with a tone control circuit.
Sounds fairly good and has ample power. LM4780 power amp layout was done on EAGLE SW. Aluminium cabinet top cover covered with black vinyl.

S. Ramdass
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Old 8th November 2019, 06:55 PM   #3259
osscar is online now osscar  Latvia
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Nice chipamp !
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My DIY so far: two Leach amps,two Pass AB100, Pass F5, B1 buffer, Hiraga le monstre, two LM3875, LM1875, OPA549, 6C33C SE, GU32 PP, 6p3c-e PP, Marsh headphone amp.Phono - OBH-8se, Pacific RIAA, inDiscreet Phono, MF A1 Clone, Whammy headphone amp.
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Old 15th November 2019, 10:52 PM   #3260
bkercso is offline bkercso  Hungary
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Default Composite amps

Hi All,

Let me share some photos about my creations. From the time I listened a composite amplifier I'm experimenting with nothing else...

IMG 1..3: Composite OPA128+TDA7386 in 2.1 config (xover @120Hz 2nd order with NP0 caps in the satellite channels). With RC filter and some Kmultipliers (thx Keantoken!). In the pics there is OPA2134s for the test.

IMG 4..5: Composite OPA1642+TPA6120 with modified Meyer crossfeed and similar PSU system as above. Virtual ground using a diamond buffer (Walt Jung buffer).

IMG 6: Composite OPA140+LM3886 with solid wireing. Common passive filters+Kmultis and filtered Zener PSU for the OPAs. I applied a DC sopper in the primer circle.

IMG 7: My 2nd composite headphone amp for conducting OPA-test (listened more than 70 differend OPAs and buffers) and testing some supply rail filter designs for the distortion cancelling OPA. In the picture my first discrete OPA is attached with a diamond buffer. Cap-multi, Kmulti and passive VGND (virtual ground). For the 1st OPA I loved 2x220R+470uF rail filter: simple and efficient.
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Last edited by bkercso; 15th November 2019 at 11:02 PM.
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