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    Purifi based car amp: Brax by Audiotec Fischer

    I am the Dsp tuning tech guy for the uk distributor now and have direct contact with Julian Fischer of Audiotec Fischer who’ve developed it with purifi I was privy to some seminars at the euro finals last week in Austria The Amp is designed to work with the mighty Brax Dsp and has a coax and...
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    I found out how to make the strongest subwoofer sound

    Doing what? Having decent bandwidth? Sorry but you don’t know how to design and tune subwoofers if you think that… it doesn’t matter what systems you used, it doesn’t make you some kind of yoda for subwoofers clearly
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    UMIK-1 or any USB MIC unsuitable for timing measurements?

    A Dayton xlr mic and a Scarlett solo or 2i2 works very well and is a cheap entry I also make up an rca lead to double 1/4” ts jack to take measurements I use twin rca as I have Dsp and can swap it for a stereos RCAs in cars where I use Smaart extensively for measurements
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    I found out how to make the strongest subwoofer sound

    No I mean best from top to bottom of its bandwidth, the 15’s play from 15hz to 80hz perfectly well, box design and subwoofer choice matter massively, plus eq after the fact to make sure the impact is present
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    I found out how to make the strongest subwoofer sound

    Strongest is a silly description for that… my two fifteens in 6 cubic ft each would definitely argue that point
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    Rephase, phase corrected put can't hear a difference

    Only a 12db filter or 36db filter result in a polarity flip being required… 24db and 48hz don’t require a flip… 6/18/30db make the drivers 90 degrees out so both ways are equally out
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    Do RCA cables have a sound? ChatGPT says they do.

    The capacitance and resistance did vary in the three, however we are also told that within reason it should be inaudible, yet we were able to identify one cable with 100% accuracy
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    White vs Pink? A vs C? What to use for level balancing?

    Pink noise for all loudspeaker measurements for me with Smaart from it’s own signal generator
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    Do RCA cables have a sound? ChatGPT says they do.

    I made three of the four cables, from cable ranging from 1.50 to 6.50 a metre, the same plugs and silver solder used for each lead I am happy that all cables I made were good, not poorly engineered as you seem to imply should make a difference
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    Do RCA cables have a sound? ChatGPT says they do.

    Oddly… in a blind abx test we were able to pick out a certain rca vs three others 100% of the time, we randomised the channels and switched from one side of the switching box to the other in case it was a hardware issue, but repeatedly we could identify which channel this rca was on… So yes, I...
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    RCA to XLR adapter and amp gain

    I think your asking if the overall output will be less… gain will be the same, but half the voltage out… as balanced for example with 4v input… would make more output voltage vs rca input with 2v input
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    S.M.S.L PO100, PO100 PRO & PO100 AK - Measurements (Digital Interfaces & DAC)

    Oh my… you’re serious! It makes no difference to the 1’s and 0’s if they get from one end to the other… a digital cable cannot impart a sound or improve sound in any way
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    S.M.S.L PO100, PO100 PRO & PO100 AK - Measurements (Digital Interfaces & DAC)

    Won’t sound any different to an optical cable from plastic
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    D'AMORE E660.5 Car Amplifier Review

    Helix C four all with focusrite 8i6 (not 2i2 as I said, the 8i6 is 2-3db cleaner than the 2i2) I’ll post up the cosmos measurement for comparison later
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    D'AMORE E660.5 Car Amplifier Review

    I have results of my Helix C four and a lot of others… my first tests were with a focusrite 2i2, however when I’ve remeasured the Helix with my cosmos E1da it was clear the noise of the Scarlett was higher than the noise of the amp I will post them up, I am still not 100% I am using the cosmos...
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    Denon AVRs vs Integrated stereo Amplifiers for 2 channel music

    I’m tech consultant for the uk Audiotec Fischer distributor specialising in the Dsp side of things and tuning if you ever get stuck, I’ve owned Dsp.3, .3s, pro 3, ultra and pro 2, plus numerous conductors and directors, AF gear is awesome… soon to own a Brax amp or two currently have a helix C...
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    Denon AVRs vs Integrated stereo Amplifiers for 2 channel music

    MultEQ X doesn’t replicate Dirac and the algorithms and fir, for me I get more control with the Dsp in my car than MultEQ X gives me
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    S.M.S.L PO100 AK - Measurements / Round 2 (DAC)

    Just to confirm the original measurements of the second sample werent a golden sample... this is my AK measured with an E1DA... i found my olimex filter made a positive difference to the measurements from my lenovo x13 yoga Excellent left to right matching
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    Aiyima’s TPA3255 PFFB based amplifier, coming soon

    Very strange choice of subwoofer cut off freqs… and I’m thinking it doesn’t apply a hpf to the amped speakers? How is that not a basic requirement… gimmick added for people who don’t know better
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