Latest Thread Images

L.K.S. Audio MH-DA004 Dual ES9038PRO DAC - Van Damme's double impact?
Dec 18, 2020 at 9:22 AM Post #3,064 of 4,419
Good afternoon gentlemen. Forgive me for an apprentice inquiry, but this is where the source of knowledge and help is. I listen to my music from PC to LKS + Amanero usb upsampled to dsd512 with a satisfactory result for me, but reading to you, I see that you sometimes talk about Singxer devices. As I am always looking for an improvement, my question is if you think that inserting a Singxer SU6 between my pc and the dac would obtain a significant improvement or upgrade. Do you think I would have a better SQ ...? Or would it be wasting money ...? Thanks, as always, for any feedback from you. Greetings to all ....:relaxed:
 
Dec 19, 2020 at 5:43 AM Post #3,065 of 4,419
b0bb said:
You will need a signal generator that is capable of doing a frequency sweep from 5Hz to 22kHz.
Laptop with sound output will do for this.
Adjust the crossovers on the sub to get the flattest possible response on a frequency sweep.

You will hit your room's first fundamental resonance, look for the most prominent peak and null point on the sweep.
If possible, add acoustic absorbers and dampers to help control it.
Do not try to EQ this away, it will waste a lot of amplifier power.

Measure the room impulse response using a tool like Acourate and feed the data to HQPlayer to integrate the sub and main speakers.
RoomEQ Wizard is an alternative but requires more manual processing

This is similar to what Audyssey or Dirac does on Hometheater boxes, with these your are mostly limited to 48kHz and anything higher is downsampled, no DSD.

HQPlayer is the only tool I know of that can process DSD room correction without PCM intermediate conversion.
Click to expand...
Hi B0bb,
I think I didn't ask my question clearenough. Have you ever considered using a Rythmik subwoofer? Servo and no DSP :)
 
Dec 19, 2020 at 3:19 PM Post #3,066 of 4,419
Xoverman said:
Hi B0bb,
I think I didn't ask my question clearenough. Have you ever considered using a Rythmik subwoofer? Servo and no DSP :)
Click to expand...
Talked them a few years ago, technically interesting speaker, far less confident about them as a business, went to the bottom of my list of prospects.

My replacement choice for the HGS18 is a servo unit from REL, planning to get 2 maybe 3 smaller units to provide more flexibility in handling the various room modes.
 
Dec 21, 2020 at 8:54 AM Post #3,067 of 4,419
Planning to do the crystal swap in a few days.

Since I will have the PCB out of the chassis, is there anything I should replace while I have it out?


My diodes are BYW29-200G.


https://www.digikey.com/en/products/detail/on-semiconductor/BYW29-200G/1476300?utm_adgroup=Semiconductor Modules&utm_source=google&utm_medium=cpc&utm_campaign=Dynamic Search&utm_term=&utm_content=Semiconductor Modules&gclid=CjwKCAiArIH_BRB2EiwALfbH1BnstKXI9w0Yu52_32XXl4ulxI1uFWY4foj2dhuDNf8yiidxKXpgBRoCL8AQAvD_BwE

Are the MBRF10H100-E3/45 are drop in for the BYW29-200G?

https://www.digikey.com/en/products/detail/MBRF10H100-E3/45/MBRF10H100-E3/45GI-ND/2153381?itemSeq=348727238

I grasp the concept of not changing too many things at once but it would seem to make sense to at least do the bare necessities on the main board while it's being handled.
 
Last edited:
Dec 21, 2020 at 11:45 AM Post #3,068 of 4,419
delete
 
Last edited:
Dec 21, 2020 at 5:27 PM Post #3,070 of 4,419
Markup of some of the common mods

Initial set of modifications:
[1] XO Crystek CCHD950X Qty: 1

[2] Schottky High Barrier diodes, fully insulated low leakage, Vishay MBRF10H100 Qty:28
The actual diodes are black in the top right of the picture on the Amanero PSU

[3] Tantalum Vcom bypass Qty:2
Generic Yellow bead solid tantalum 100uF 10V eg AVX TAP107K010SRW
Unit in photo is a Wet Tantalum 150uF 10V Vishay 109D157X9010C2 (Expensive)

Followup modification set:
[4] Analog post filter.
(Check your actual DAC post filter configuration is similar to my early revision 004)
33nF 63V 5mm lead spacing 1% Kemet PHE426 metallized polypropylene Qty:4
2200pF 100V 5mm lead spacing 1% Vishay KP1830 film/foil Qty:12

[5] Wima 0.15uF 100V 5mm lead spacing metallized polypropylene Qty:14

[6] Texas Components Vishay 0.1% TX2575 2W Z-Foil resistors for I/V Qty:4
Not shown in picture, on underside of board, refer to earlier posts
https://www.head-fi.org/threads/l-k...van-dammes-double-impact.840938/post-16019754

[7] Big Mundorf 10000uF 63V. Qty:2
Replace little Mundorf LKS is using in later revisions of the LKS004.

LKS004 Mod Markup.png
 
Last edited:
Dec 22, 2020 at 12:11 AM Post #3,071 of 4,419
b0bb....
Z
Very very much appreciated! Thank you, thank you!
 
Dec 22, 2020 at 10:30 AM Post #3,072 of 4,419
Last edited:
Dec 22, 2020 at 3:40 PM Post #3,073 of 4,419
Last edited:
Dec 22, 2020 at 3:50 PM Post #3,074 of 4,419
You must log in or register to reply here.

Users who are viewing this thread

Total: 10 (members: 0, guests: 10)
Back
Top