My impressions are here: http://www.diyaudio.com/forums/vend...magnitude-24-bit-384-khz-236.html#post4274847
Stixx which filter are you on now? I actually thought the stock filters were quite annoying (way too upfront) with the HD800 😛
ristar,
you will be surprised that I am on the stock filter.
No. I am not deaf, and I have sensitive ears 😛
you will be surprised that I am on the stock filter.
No. I am not deaf, and I have sensitive ears 😛
Nothing wrong with different taste in experiences 🙂
I've since done some mods on the board and recently listened to the HD800 again and found it much more enjoyable but I should try the stock filter again to reaffirm I guess. Right now I'm on Paul's V4 filter. I found much more depth with that filter.
Hello
I've been following the thread for a while..
Is this viable? Raw voltage output (1.4V) of Soekris DAM1021 R2R DAC into BA-3 as preamp? And then naked f4 amp. So no opamps.
So from the raw DAC output to speakers its just two stages of amplification since the f4 is just a follower stage ?
I've been following the thread for a while..
Is this viable? Raw voltage output (1.4V) of Soekris DAM1021 R2R DAC into BA-3 as preamp? And then naked f4 amp. So no opamps.
So from the raw DAC output to speakers its just two stages of amplification since the f4 is just a follower stage ?
I am really looking forward to trying Paul's filters.
Will include your favourite V4 as well as the CraPMAgiC etc..
When it's even better than stock, fine 😀
Guess it depends on how efficient your speakers are? Or how loud you like to listen?
I'm using the Pumpkin as the output/gain stage (20dB) for the DAM1021 and it goes into the aleph J (20dB) and I'm at -05dB for full volume listening.
Thanks Ristar
BA-3 front end as a preamp has x30 gain (about 30dB). The naked f4 won't add gain as it is a follower stage.
Can increase gain by increasing the value of the 332R resistor of ba-3 and get all the required voltage gain from ba-3 only.
DimDim reports that the DAM1021 is not "aggressive" enough in the low end. So my thinking is to use as few gain stages of possible.
BA-3 front end as a preamp has x30 gain (about 30dB). The naked f4 won't add gain as it is a follower stage.
Can increase gain by increasing the value of the 332R resistor of ba-3 and get all the required voltage gain from ba-3 only.
DimDim reports that the DAM1021 is not "aggressive" enough in the low end. So my thinking is to use as few gain stages of possible.
The v4 is probably my favourite thus far. The v series are close to the crapmagic type filters but have improved FIR2. Tbh the crapmagic was an early experiment and things have moved on from there.
Well, IMO the bass is perfectly fine... But it also depends where you are coming from or comparing with. Where I live we don't have huge *** rooms and with my listening lists the lower registers work just fine here.
Regarding gain you probably have to just rig it up and test... For me personally, whenever I don't have enough gain things seem lifeless. I'm aware of the F4 being a current buffer (i have an on-off obsession with building a balanced ba3 😀) Really though, if your speakers are efficient enough I think it will be fine 😉
I did not mean that the DAM is not "aggressive" in the low end, I meant that it appears to lack dynamics in the whole spectrum. It appears to sound a bit "restrained" in its performance.
Again, this problem is not evident in all systems. I barely noticed it in my main system (normal (electrodynamic) speakers, amps, etc) but it was very clear in at least two systems with magneplanar speakers.
Thanks for clearing that up... Can I check which filter were you using in those comparisons? Just want to make sure i went through those filters, too 😛
I am very beginner and new here, I see there are 3 different output from Soekris DAC (Balance, buffer and raw). May I ask if update different filter to the DAC, will it change the sound from the raw output as well??
Thanks
Thanks
I believe I was using CRAPMagic. I would love to hear what people have to say about the DAM's dynamics while trying different filters. In other words, I'd like to know whether they noticed differences in dynamics between different filters.
The outputs are essentially two, the buffered and the unbuffered. The same buffered output may be used for either balanced connection or single ended, depending on the way the connections are made.
Both outputs are influenced in the same way by the filter.
http://www.diyaudio.com/forums/digi...ilter-brewing-soekris-r2r-53.html#post4277539
Try those filter variations Paul posted there. It is one filter but in different variations from minimum to linear phase.
Dynamics is kind of subjective, so I can only guess what you are missing, but for my ears, there is a very notable difference in what I would call dynamic behavior between those filters.
Linear Phase sounds flat to my ears and minimum phase the most lively to an extend that it might be too much. Paul suggested that the intense overshoot of that filter could contribute to that perception.
by the way, this is my favorite so far:
http://www.diyaudio.com/forums/digi...ilter-brewing-soekris-r2r-56.html#post4280110
I haven't noticed a difference in "snap" (which I think you mean; as the dynamic range seems to be the same for me) For me, the impact of the filters have mostly been on the soundstage; imaging...and maybe a tinge of treble response.
For context, on my setups I found the stock filters to be very "2D" or "flat"... everything is sort of brought to the same plane (in levels)... which means imperfections in recordings (like a Live performance) are brought right up to the forefront and is sometimes very distracting (e.g. someone backstage dropping things... or doors closing become really loud). This takes nothing away from the tonal balance and detail of the stock filters. It's all there... it's just the presentation isn't my cup of tea.
I don't know anything about filter creation (I just leech there 😛), but I wonder if it is possible to put a bit of snap with the filters (sort of like what an "S-curve" does for image processing). It probably won't be absolutely accurate, but I can see the appeal.
Last edited:
Well, I did not really listen a lot to that filter, so I cannot comment. Sorry
But even with the filter setting I called "flat", the dam is still better sounding than my other DACs by some margin. (None of them are expensive or audiophile, so take my comments with a grain of salt)