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Class D Switching Power Amplifiers and Power D/A conversion

Ideas to make use of space left inside enclosure?
Ideas to make use of space left inside enclosure?
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Old 26th November 2012, 06:01 PM   #11
adason is offline adason  United States
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"Ideas to make use of space left inside enclosure?"

LED peak meter...fun to watch
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Old 26th November 2012, 06:21 PM   #12
AC439 is offline AC439  United States
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Thanks for more ideas.

**Got enough supply capacitance in your 2050 circuit setup ? Could be your bass 'problem'.**
-- I have tried adding a 15000uF cap at the power rail, no difference.

**DAC - russian chip mods**
-- Thought about DAC too. Not too sure but will consider this idea

**LED meter
-- I also thought about this after I posted init message. I have one that is relatively big size with 16 LEDs per channel. I ditched this idea because I have to drill 32 perfectly aligned holes for the LEDs. Chances of messing it up is very high with my poor crafting skill.

Am I opening up a can of worms ???
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Old 27th November 2012, 10:12 PM   #13
nigelwright7557 is offline nigelwright7557  United Kingdom
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I have never been a fan of items inside a speaker box.
The vibration and sound waves changing the air pressure rapidly wont do any electronics any good.
Of course you can buy active speakers but are they as reliable ?

I have seen space electronics tested on vibration beds and seen things fly apart.

I always have my amplifiers in separate boxes to the speakers.
PCBCAD51 pcb design software. 2018 version out now. http://www.murtonpikesystems.co.uk
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Old 29th November 2012, 04:14 AM   #14
AC439 is offline AC439  United States
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Question what speaker box?

Originally Posted by nigelwright7557 View Post
I have never been a fan of items inside a speaker box......
But I am not using a speaker box for electronics. I just use a 19" rack mount type enclosure for the amplifier.
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Old 22nd December 2012, 06:42 PM   #15
AC439 is offline AC439  United States
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Smile I put in the Sonic Impact TA2024

Well I decided to add the original SI TA2024 into the space as two separate amps. I have uploaded the pics. After two amps inside the enclosure, I still have lots of space left !

I have done more changes to the Sure TK2050 and the bass is a lot better. The amp has more warmth too:
1) Output coils changed from factory tiny ones to 10uH toroids.
2) Shorted the power input diodes.
3) Added two 2.2uF MKT1813 bypass caps to power tank caps (installed underside the board).

Already done:-
1) 2.2uF MKT1813 input caps
2) Tank caps changed to ROE 2000uF NOE
3) External 15000uF power tank cap.

The left side is the Sonic Impact TA2024. I have not done much on this board except the input caps and tank caps with a 15000uF external cap. The outputs of this amp are connected to a car "speaker to line level convertor" to drive the Dayton sub. It works perfectly to link the TA2024 to the RCA inputs of the sub and provide isolation of the two (-) terminals of the amp which is required (as you can see the blue cable connecting between the level converter and the sub).

Other items in the pics are the Gold ROE tank caps which is the same kind I used in my JLH Class A amps in the power section which has improved sound. There is a Zobel network at the speaker teminals. This was done incorrectly as the Zobel network in Tripath datasheet has it placed before output coils. But I placed it after output coils. The toroids are 2010-V-RC 10uH. The toroid material is type 52, high perm. But it sounds much better and more refined compare to the tiny factory coils.

The two SMPS are 12V 5A for the SI and a 19V 2.2A for the TK2050. I know the one for the TK2050 is underrated. It will eventually be changed to a 27V 5A or 6A SMPS. But even now after the above mods, the bass is good and it does sound nice though.

The pic of the SI TA2024 is not completely tidy and neat. I want to try better coils on the SI later. It is now being connected to the output of the TV for movie with the sub connected.

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