Member
Joined 2006
The NP analog design sounds much better to me as follows:
1) More headroom, lower overall noise floor. MiniDSP D-to-A outputs are a circuit design weak point.
2) Less woofer over-excursion, reduces woofer distortion
3) Smoother upper mid-hi equalization, reduces phase shift problems introduced by the Linkwitz DSP filter design which actually detracts from any benefit of the more precise EQ
Overall sound is smoother and more listenable, with no loss of detail. No noise, hiss or hum.
May I ask which minidsp was in the comparison, an HD version?
Simulations for the filters involved are posted in the DIY section of
FIRST WATT
for LTspice and Microcap. It is very easy to modify the filters to get what
you want, usually just by altering the values of the existing resistors and
capacitors.
FIRST WATT
for LTspice and Microcap. It is very easy to modify the filters to get what
you want, usually just by altering the values of the existing resistors and
capacitors.
May I ask which minidsp was in the comparison, an HD version?
I have both a standard 2X4 and a 2X4HD. I have done LXmini loudspeaker listening tests between the two and I don't hear much difference in the DSP algorithms or the A-D and D-A converters. Surprising, given that the HD has 2X the processing speed. The HD is better, but it's subtle. I think the biggest advantages to the HD version are the enhanced interface and control features.
MiniDSP is a wonderful design tool that allows quickly changing crossover points, slopes, filter alignment, levels, polarity, etc. Analog implementation of the final filter choices typically sounds better to me, even if those implementations are not always quite as "precise" as what is theoretically provided by the DSP device.
Member
Joined 2006
I have both a standard 2X4 and a 2X4HD. I have done LXmini loudspeaker listening tests between the two and I don't hear much difference in the DSP algorithms or the A-D and D-A converters. Surprising, given that the HD has 2X the processing speed. The HD is better, but it's subtle. I think the biggest advantages to the HD version are the enhanced interface and control features.
SL and I spent time comparing the 2X4 and HD and found that there was a substantial improvement, removing much of the issues of the original. I attributed it largely to the removal of the extra D/A and A/D conversion involved.
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So a three way is in the works? Any ETA?
Yes, Nelsons 3way balanced stereo pcbs are available (2 more in stock from this batch). They may feed LXmini/LXsirius, LXmini+2/LXsirius+2 or LXstudio. User may switch between configurations.
https://www.magiclx521.com/epages/1...ctPath=/Shops/17940394/Products/"ASP mini NP"
For exports outside EU, German VAT 19% does not apply.
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These pcbs are a different product, balanced and 3-way.
(DIYaudio boards are unbalanced 2-way).
What is in the box? balanced stereo pcb for 3way , JFETs, 3mm full aluminum case in slim 19" format
or:
fully assembled stereo pcb, balanced , 3-way 3mm full aluminum case in slim 19" format.
These run on +/-15V rails. OK?
Best
Frank
(DIYaudio boards are unbalanced 2-way).
What is in the box? balanced stereo pcb for 3way , JFETs, 3mm full aluminum case in slim 19" format
or:
fully assembled stereo pcb, balanced , 3-way 3mm full aluminum case in slim 19" format.
These run on +/-15V rails. OK?
Best
Frank
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Agreed:- I found the same:- that the 2x4HD and the 4x10HD, no matter what or how I set it up, they/it 'sits' on the sound. All the info is there but with something missing compared to straight analog or rather the LXmini. I have since sold the 4x10HD but find the 2x4HD to be a superb 'tool' .SL and I spent time comparing the 2X4 and HD and found that there was a substantial improvement, removing much of the issues of the original. I attributed it largely to the removal of the extra D/A and A/D conversion involved.
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