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Author Topic: B'ASS Current Amplifier  (Read 63061 times)
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PeterSt
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« Reply #300 on: April 22, 2017, 10:42:56 pm »

Hi Mani,

I'd have to sort ou how much more is possible, but in theory the 6dB is achievable.

Best regards,
Peter
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For the Stealth LPS PC :
W10-14393.0 - December 23 2016 (2.07)
*XXHighEnd Mach II Stealth LPS PC -> Xeon E5 2640v4 with Hyperthreading On (20 cores)* @~720MHz, 32GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/1/0/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 120  (max 120) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = 43 / Nervous Rate = 100 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> *Clairixa USB 1m80* -> *Phisolator* 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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CoenP
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« Reply #301 on: April 23, 2017, 12:45:13 pm »

Hi Mani,

Just to be sure: are you able to use the right transformer secondaries for the loudspeaker impedance? Between a 4 and a 16 ohms tap is a 6dB difference in output voltage level (3dB between 4-8 or 8-16).

Regards, Coen
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Audio PC: XXHE PC with RAMdisk. Music PC with i5. Power cable PE not connected, together with nos1 and poweramp in separate "audio" powerstrip.

Set of Clarixa, Intona, Phasure NOS1a-75B USB (buf 4 ms)-> Blaxius ->SE EL95 (0,8W triode) + MiniDSP/T.amp3000-> biwired QED cable-> Bastanis Mandala Duo.

[other sources: TD124/3009SII-i/Grace F9/lounge LCR phono; Rega Planet 1997 vintage]
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« Reply #302 on: April 23, 2017, 12:55:54 pm »

Hi Coen, I sent Reinhard Thöress (designer/manufacturer of my amps) the specs of my horns, and he recommended going for the 4 Ohm taps. I think he felt 109dB/W was plenty to be playing with, but perhaps I should have made it clear that the NOS1 output is slightly less than most other DACs. The taps are hard-wired inside the amps, though can be changed. So it's good to know that if I really need more gain, I could change to the 8 or 16 Ohm taps.

Thanks for pointing this out.

Mani.
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Audio PC: Phasure Mach II / Win 14393.0 on RAM-OS / controlled by RDC, no GPU card installed / connected directly to music server
XXHighEnd: 2.07 / Minimize OS / Engine#4 Adaptive / DB=4096 / Q1=0 /  xQ1=1 / Q3,4,5=0 / SFS=1.00 / XTweaks = 43, 100, 0, 0, 1 / Straight Contiguous / Clock Resolution = 1ms / Scheme 3-5 (low/realtime) / 16x Arc Prediction / Unattended
Main System: USB3 port -> *Lush* -> Phisolator -> Phasure NOS1a B75 G3  -> BD-Design BD30-SPR mono amps -> Tune Audio Anima horn speakers
Office System: *Lush* -> Phisolator -> Phasure NOS1a G3  -> BD-Design BD30 stereo amp -> Impulse H2 horn speakers
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« Reply #303 on: April 23, 2017, 02:38:31 pm »

Hi Mani,

I'd have to sort ou how much more is possible, but in theory the 6dB is achievable.

Best regards,
Peter

Hi Peter,

I'm hoping to be in line for your upgrade in the near future.

And I too would like to get the extra 6db:)

Thanks,

Henk
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Win10 10586 / music on LAN /  / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.40  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/  / UnAttended (Just Start) / Always Copy to XX Drive / Stop Desktop-Remaining-WASAPI-W10 Services / Keep LAN - Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 0 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = Optimal / Time Stability = Stable / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a DAC -> BAlanced interlink -> Highly Upgraded Apogee Grand loudspeakers, using STAX dma-x2(midrange) / Heavily modified Krell FPB600C (bass ribbon)

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« Reply #304 on: April 23, 2017, 03:23:16 pm »

Hi Henk,

Yes, you are. Happy

Notice that I can not guarantee it yet, apart from "a little more" as talked through earlier. It must be tested.

Best regards,
Peter
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For the Stealth LPS PC :
W10-14393.0 - December 23 2016 (2.07)
*XXHighEnd Mach II Stealth LPS PC -> Xeon E5 2640v4 with Hyperthreading On (20 cores)* @~720MHz, 32GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/1/0/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 120  (max 120) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = 43 / Nervous Rate = 100 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> *Clairixa USB 1m80* -> *Phisolator* 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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CoenP
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« Reply #305 on: April 24, 2017, 12:14:07 pm »

Hi Coen, I sent Reinhard Thöress (designer/manufacturer of my amps) the specs of my horns, and he recommended going for the 4 Ohm taps. I think he felt 109dB/W was plenty to be playing with, but perhaps I should have made it clear that the NOS1 output is slightly less than most other DACs. The taps are hard-wired inside the amps, though can be changed. So it's good to know that if I really need more gain, I could change to the 8 or 16 Ohm taps.

Thanks for pointing this out.

Mani.

Hi Mani,

You should definitely go for better matching of transformer and speaker. I had to insert Pault Spelz "Zeroformers" to get sufficient power for my 100dB+ 16 ohm baffles. These are quite versatile so I experimented a bit and learned that 6dB is a LOT of extra output especially since my "power" amp is so feeble in the first place (5ohm output tap). I was able to optimize the sound quality  by finding the best coupling.

These "Thöress" amps are very nice looking retro styled amps. I am pleased to hear they sound good too. Wich one do you have the 300B or 845? Their low sensitivity is part of the design philosophy so a preamp (that actually amplifies) is actually expected.

regards, Coen
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Audio PC: XXHE PC with RAMdisk. Music PC with i5. Power cable PE not connected, together with nos1 and poweramp in separate "audio" powerstrip.

Set of Clarixa, Intona, Phasure NOS1a-75B USB (buf 4 ms)-> Blaxius ->SE EL95 (0,8W triode) + MiniDSP/T.amp3000-> biwired QED cable-> Bastanis Mandala Duo.

[other sources: TD124/3009SII-i/Grace F9/lounge LCR phono; Rega Planet 1997 vintage]
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« Reply #306 on: April 25, 2017, 01:36:36 pm »

Hi Peter,

Just recently joined the Phasure community (i sent you an introduction email on the weekend smile) , can you please add me to the list for the upgrade trifecta: B'ASS, Phisator and the 'Secret Upgrade'.

Cheers,

Jayce
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PeterSt
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« Reply #307 on: April 25, 2017, 01:38:04 pm »

Hey Jayce, welcome here !

I hope you don't mind I already put you on the list (instead of -). But I had a question mark in there which I will scratch now.

Kind regards and have fun !
Peter
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For the Stealth LPS PC :
W10-14393.0 - December 23 2016 (2.07)
*XXHighEnd Mach II Stealth LPS PC -> Xeon E5 2640v4 with Hyperthreading On (20 cores)* @~720MHz, 32GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/1/0/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 120  (max 120) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = 43 / Nervous Rate = 100 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> *Clairixa USB 1m80* -> *Phisolator* 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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PeterSt
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« Reply #308 on: April 28, 2017, 07:02:22 pm »

Hi Mani,

I'd have to sort ou how much more is possible, but in theory the 6dB is achievable.

Best regards,
Peter

OK, that was too much of theory. Sadly, it is 1dB only and I wouldn't even do that;
A tiny bit more and it goes wrong. No not even headroom above that 1dB - the 1dB *is* the headroom. Not advised now I know it anyway ...

sorry
Peter
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For the Stealth LPS PC :
W10-14393.0 - December 23 2016 (2.07)
*XXHighEnd Mach II Stealth LPS PC -> Xeon E5 2640v4 with Hyperthreading On (20 cores)* @~720MHz, 32GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/1/0/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 120  (max 120) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = 43 / Nervous Rate = 100 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> *Clairixa USB 1m80* -> *Phisolator* 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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« Reply #309 on: April 29, 2017, 09:38:17 am »

OK.

With only 1dB of headroom, would you recommend not playing back at 0dB attenuation in XX?

From the top of my head, I can think of only a handful of 24 bit (mostly classical) albums that I have that I'd ideally like to play back with more volume than 0dB currently gives me. So this really isn't much of an issue at all... but would have been nice.

Thanks for looking into it anyway.

Mani.
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Audio PC: Phasure Mach II / Win 14393.0 on RAM-OS / controlled by RDC, no GPU card installed / connected directly to music server
XXHighEnd: 2.07 / Minimize OS / Engine#4 Adaptive / DB=4096 / Q1=0 /  xQ1=1 / Q3,4,5=0 / SFS=1.00 / XTweaks = 43, 100, 0, 0, 1 / Straight Contiguous / Clock Resolution = 1ms / Scheme 3-5 (low/realtime) / 16x Arc Prediction / Unattended
Main System: USB3 port -> *Lush* -> Phisolator -> Phasure NOS1a B75 G3  -> BD-Design BD30-SPR mono amps -> Tune Audio Anima horn speakers
Office System: *Lush* -> Phisolator -> Phasure NOS1a G3  -> BD-Design BD30 stereo amp -> Impulse H2 horn speakers
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« Reply #310 on: April 29, 2017, 10:06:40 am »

Quote
With only 1dB of headroom, would you recommend not playing back at 0dB attenuation in XX?

Mani, what slipped through my mind after seeing the results yesterday, is dat you had a remark which was related IIRC, about your two NOS1a's both behaving drifferently regarding 0dBFS. Am I right ? now, it can be just this ...

I wanted to ask you anyway what this was about, because we now have yours both here ...

Regards,
Peter
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For the Stealth LPS PC :
W10-14393.0 - December 23 2016 (2.07)
*XXHighEnd Mach II Stealth LPS PC -> Xeon E5 2640v4 with Hyperthreading On (20 cores)* @~720MHz, 32GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/1/0/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 120  (max 120) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = 43 / Nervous Rate = 100 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> *Clairixa USB 1m80* -> *Phisolator* 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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« Reply #311 on: April 29, 2017, 10:15:46 am »

I was going to mention this, but thought it might just complicate things.

Yes, it seemed to me that the sound changed between XX set to 0dB and any other volume setting. 0dB sounded 'thicker', with a loss of sparkle in the sound. And my feeling was that this had nothing to do with clipping or headroom, because the material I was using had an RMS level of -20dB or so. I also felt that it was an 'issue' with XX and not the NOS1 (either of them).

In any event, this is no longer relevant in my office system because I have removed the preamp and tend to playback on XX/HQP at around -30dB. But in my main system, I'm tending to playback on XX at between -6dB and -1.5dB. I avoid playing back at 0dB for the reason cited above (even if the RMS level of the material is low).

Does that make sense?

Mani.
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Audio PC: Phasure Mach II / Win 14393.0 on RAM-OS / controlled by RDC, no GPU card installed / connected directly to music server
XXHighEnd: 2.07 / Minimize OS / Engine#4 Adaptive / DB=4096 / Q1=0 /  xQ1=1 / Q3,4,5=0 / SFS=1.00 / XTweaks = 43, 100, 0, 0, 1 / Straight Contiguous / Clock Resolution = 1ms / Scheme 3-5 (low/realtime) / 16x Arc Prediction / Unattended
Main System: USB3 port -> *Lush* -> Phisolator -> Phasure NOS1a B75 G3  -> BD-Design BD30-SPR mono amps -> Tune Audio Anima horn speakers
Office System: *Lush* -> Phisolator -> Phasure NOS1a G3  -> BD-Design BD30 stereo amp -> Impulse H2 horn speakers
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« Reply #312 on: April 29, 2017, 12:05:05 pm »

Quote
Does that make sense?

Sure. It is only that the RMS level doesn't tell much (but depending how you audibly observe). Thus, with e.g. a drumming track the RMS level will be very low, while each hit can reach maximum digital level.

When you'd normalise the volume of an album of concern (via XXHighEnd), you can look in the XXAnalysis.dat file which resides in the folder where the track files are to see the max level - 32767 is maximum. 6dB less is half of that (3dB is 25% less).

Peter
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For the Stealth LPS PC :
W10-14393.0 - December 23 2016 (2.07)
*XXHighEnd Mach II Stealth LPS PC -> Xeon E5 2640v4 with Hyperthreading On (20 cores)* @~720MHz, 32GB, Windows 10 Pro 64 bit build 14393.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/0/1/0/ Q1Factor = 10 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 120  (max 120) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = 43 / Nervous Rate = 100 / Cool when Idle = n.a / Provide Stable Power = 0 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> *Clairixa USB 1m80* -> *Phisolator* 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere (also from the PC).

For a general PC :
W10-10586.0 - May 2016 (2.05+)
*XXHighEnd PC -> I7 3930k with Hyperthreading On (12 cores)* @~500MHz, 16GB, Windows 10 Pro 64 bit build 10586.0 from RAM, music on LAN / Engine#4 Adaptive Mode / Q1/-/3/4/5 = 14/-/1/1/1 / Q1Factor = 1 / Dev.Buffer = 4096 / ClockRes = 1ms / Memory = Straight Contiguous / Include Garbage Collect / SFS = 0.10  (max 60) / not Invert / Phase Alignment Off / Playerprio = Low / ThreadPrio = Realtime / Scheme = Core 3-5 / Not Switch Processors during Playback = Off/ Playback Drive none (see OS from RAM) / UnAttended (Just Start) / Always Copy to XX Drive (see OS from RAM) / All Services Off / Keep LAN - Not Persist / WallPaper On / OSD On / Running Time Off / Minimize OS / XTweaks : Balanced Load = *43* / Nervous Rate = 1 / Cool when Idle = 1 / Provide Stable Power = 1 / Utilize Cores always = 1 / Time Performance Index = *Optimal* / Time Stability = *Stable* / Custom Filter *Low* 705600 / -> USB3 *from MoBo* -> Clairixa USB 15cm -> Intona Isolator -> Clairixa USB 1m80 -> 24/768 Phasure NOS1a 75B (BNC Out) async USB DAC, Driver v1.0.4b (4ms) -> Blaxius BNC interlink *-> B'ASS Current Amplifier /w Level4 -> Blaxius Interlink* -> Orelo MKII Active Open Baffle Horn Speakers.
Removed Switching Supplies from everywhere.

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manisandher
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« Reply #313 on: April 29, 2017, 07:41:17 pm »

When you'd normalise the volume of an album of concern (via XXHighEnd), you can look in the XXAnalysis.dat file which resides in the folder where the track files are to see the max level - 32767 is maximum. 6dB less is half of that (3dB is 25% less.

I've been using TT DR Meter to check RMS and peak levels, but I'll use XX too from now on. Actually, looking at a drum kit track, I can see exactly what you mean.

Mani.


* DR drum kit.JPG (53.36 KB, 260x609 - viewed 177 times.)
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Audio PC: Phasure Mach II / Win 14393.0 on RAM-OS / controlled by RDC, no GPU card installed / connected directly to music server
XXHighEnd: 2.07 / Minimize OS / Engine#4 Adaptive / DB=4096 / Q1=0 /  xQ1=1 / Q3,4,5=0 / SFS=1.00 / XTweaks = 43, 100, 0, 0, 1 / Straight Contiguous / Clock Resolution = 1ms / Scheme 3-5 (low/realtime) / 16x Arc Prediction / Unattended
Main System: USB3 port -> *Lush* -> Phisolator -> Phasure NOS1a B75 G3  -> BD-Design BD30-SPR mono amps -> Tune Audio Anima horn speakers
Office System: *Lush* -> Phisolator -> Phasure NOS1a G3  -> BD-Design BD30 stereo amp -> Impulse H2 horn speakers
jabbr
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« Reply #314 on: May 24, 2017, 05:14:24 am »

Hi Peter, so I think I don't have G3 (yet) ... but what is the lead time to get upgrade? (Can it really get better ? Happy

Jonathan
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XXHE on ASRock Q1900M, Intel x520 singlemode fiber -> NOS1a -> FirstWatt J2 -> Senn HD800, AKG 712, The Hornshoppe
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