Hi,
I had a meeting this afternoon with Francois Gagné he came home with his Zen V4
I had my A75 and a prototype CCS-X-BOSOZ ,
Wonderful afternoon, the CCS-X-BOSOZ dit the job well unbalanced
on the Zen V4 or balanced on the A75
The Zen V4 is such a great amplifier, we should do these meetings
more often.
It has been a privilege to listen to both amplifiers.
Thanks Nelson, the Zen V4 is realy a great Pass amplifier
so is the A75, the difference was subtle, even rethinking of some listenings ;
each amplifiers has its own signature, but overall the sound was great.
Even it was difficult to tell which sounded better, they gave us
marvelous sound, and great pleasure.
Setup:
Zen V4 {Francois}
A75 {Alain}
CCS-X-BOSOZ stereo {Bias 50 mA}
Speakers: 2*Martin Logan Aerius i
Speaker cables:12 Ft 2*Coax Belden 89259 {from Jon Rich cuisine}
Interconnect balanced: 3 Ft Belden 89207 connectors Neutrik XLR {from Jon Rich cuisine}
Interconnects Acoustic Research twisted pair AR132
HDCD player NAD C 541
CD's:
Norah Jones "Come away with me" & "Feels like home"
Frank Zappa "Have I offended someone ?"
Sting "Sacred love"
Rackmaninoff "Symphonic dances" Eiji Oue and the Minnesota orchestra RRR
Strauss "Zarathustra" Solti and the Berliner orchestra by Decca
Rackmaninoff "Preludes, opp23 & 32" Vladimir Askenazy piano by Decca
Two great amplifiers, and a fantastic afternoon.
Alain.
I had a meeting this afternoon with Francois Gagné he came home with his Zen V4
I had my A75 and a prototype CCS-X-BOSOZ ,
Wonderful afternoon, the CCS-X-BOSOZ dit the job well unbalanced
on the Zen V4 or balanced on the A75
The Zen V4 is such a great amplifier, we should do these meetings
more often.
It has been a privilege to listen to both amplifiers.
Thanks Nelson, the Zen V4 is realy a great Pass amplifier
so is the A75, the difference was subtle, even rethinking of some listenings ;
each amplifiers has its own signature, but overall the sound was great.
Even it was difficult to tell which sounded better, they gave us
marvelous sound, and great pleasure.
Setup:
Zen V4 {Francois}
A75 {Alain}
CCS-X-BOSOZ stereo {Bias 50 mA}
Speakers: 2*Martin Logan Aerius i
Speaker cables:12 Ft 2*Coax Belden 89259 {from Jon Rich cuisine}
Interconnect balanced: 3 Ft Belden 89207 connectors Neutrik XLR {from Jon Rich cuisine}
Interconnects Acoustic Research twisted pair AR132
HDCD player NAD C 541
CD's:
Norah Jones "Come away with me" & "Feels like home"
Frank Zappa "Have I offended someone ?"
Sting "Sacred love"
Rackmaninoff "Symphonic dances" Eiji Oue and the Minnesota orchestra RRR
Strauss "Zarathustra" Solti and the Berliner orchestra by Decca
Rackmaninoff "Preludes, opp23 & 32" Vladimir Askenazy piano by Decca
Two great amplifiers, and a fantastic afternoon.
Alain.
Alain does not want to admit it but his A75 was very musical, more musical then my Zen V4. The piano was amazing compared to the Zen. Maybe the Martin Logan are not the best match to see the quality of the Zen? Both were good performers with the music we listened.
Of course, we tried Frank Zappa...so Nelson can sleep in peace
Very nice afternoon!
Of course, we tried Frank Zappa...so Nelson can sleep in peace
Very nice afternoon!
Francois,
Thanks,
Nelson, we loved the session, and Zappa is great !
I have a question for you, I and looking at the Aleph 1.7 preamp
and found a 87LPC762 to replace the dead 87C752 from Philips
is it difficult to program these circuits both for volume control and selection of entries ?
Best regards.
Alain.
Thanks,
Nelson, we loved the session, and Zappa is great !
I have a question for you, I and looking at the Aleph 1.7 preamp
and found a 87LPC762 to replace the dead 87C752 from Philips
is it difficult to program these circuits both for volume control and selection of entries ?
Best regards.
Alain.
kilowattski,
Yes I think there is enough ; but we didn't try the Zen V4 at high volumes
on the Aerius i . The listening gave very good results, but to my point of view the ML Aerius i need big amplifiers, like the A75. I would love to try a Aleph X with 80/100 watts. {I have two Aleph X Pcb's from HiFiZen ; but it's a future project, to try biamping the ML}
Nelson,
>>We need Wayne to answer that question. I can design a
>>processor, but I haven't the faintest idea how to program one
Well, thanks. It would be kind if you could ask Wayne about that.
I dont need details; but a little overview of the process could help me.
Best regards.
Alain.
Yes I think there is enough ; but we didn't try the Zen V4 at high volumes
on the Aerius i . The listening gave very good results, but to my point of view the ML Aerius i need big amplifiers, like the A75. I would love to try a Aleph X with 80/100 watts. {I have two Aleph X Pcb's from HiFiZen ; but it's a future project, to try biamping the ML}
Nelson,
>>We need Wayne to answer that question. I can design a
>>processor, but I haven't the faintest idea how to program one
Well, thanks. It would be kind if you could ask Wayne about that.
I dont need details; but a little overview of the process could help me.
Best regards.
Alain.
François said:Now I will be confused, an Aleph 2 or a A75??
Tested alone with these speakers, I think you will like the sound but when compared with the A75, it sounded to me less musical (especially with the piano). Again, we did not tried many different type of music and one amplifier was balanced and the other one not so could it be the difference?? I don't know.
Alain? Opinion?
Alain,
Waynes answer would be very interesting for me also. The main problem with the relays switching i do have is, when relay signal it make a lot of noise. The intersting task of the code is how to supress such noise.
I use a relais attenuator with MC for my BZLS.
Last rev. does the following:
- reading rotary encoder and set the 8 relais in range from 0 to 255
- store the last volume used and count up to it after power on
- on push function of the encoder change between 2 sources
- at source change change the volume setting to the one last used on that source.
- from one value up mute between switching the relais. (supresses some noise)
- at sourcechange mute for short time. (also supresses some noise.
- at power up wait some time with mute before count up the volume, choose the last source used.
- the code tries to minmimize errors from bouncing of encoder switches.
Its designed for minimal parts and elements at user interface (1 knob) no fancy features. MC uses internal clock so not much hardware needed.
http://home.tu-clausthal.de/~tpa/relais/index.html
Waynes answer would be very interesting for me also. The main problem with the relays switching i do have is, when relay signal it make a lot of noise. The intersting task of the code is how to supress such noise.
I use a relais attenuator with MC for my BZLS.
Last rev. does the following:
- reading rotary encoder and set the 8 relais in range from 0 to 255
- store the last volume used and count up to it after power on
- on push function of the encoder change between 2 sources
- at source change change the volume setting to the one last used on that source.
- from one value up mute between switching the relais. (supresses some noise)
- at sourcechange mute for short time. (also supresses some noise.
- at power up wait some time with mute before count up the volume, choose the last source used.
- the code tries to minmimize errors from bouncing of encoder switches.
Its designed for minimal parts and elements at user interface (1 knob) no fancy features. MC uses internal clock so not much hardware needed.
http://home.tu-clausthal.de/~tpa/relais/index.html
Till,
>>The main problem with the relays switching i do have is, when relay >>signal it make a lot of noise. The intersting task of the code is how to >>supress such noise.
Yes the noise is a major pb when switching!
>>I use a relais attenuator with MC for my BZLS.
>>Last rev. does the following:
>- reading rotary encoder and set the 8 relais in range from 0 to 255
I don't need 255 positions I would be happy with 64 or 128 pos...
> - store the last volume used and count up to it after power on
Nice to have...
> - on push function of the encoder change between 2 sources
Nice function ... get only one coder to do the job
> - at source change change the volume setting to the one last used on that >source.
Fine also...
> - from one value up mute between switching the relais. (supresses some >noise)
Well I need to have "no noise" while switching, its very important.
> - at sourcechange mute for short time. (also supresses some noise.
> - at power up wait some time with mute before count up the volume, >choose the last source used.
> - the code tries to minmimize errors from bouncing of encoder switches.
> Its designed for minimal parts and elements at user interface (1 knob) no >fancy features. MC uses internal clock so not much hardware needed.
I have seen your site, great job.
I need to figure out how to suppress all noise from such a design,
because I would prefer a carbon pot like ALPS without noise to a relay
solution that brings noise....
Question:
Do you have a board for programing the device?
How do you put the program on the chip?
Regards.
Alain.
>>The main problem with the relays switching i do have is, when relay >>signal it make a lot of noise. The intersting task of the code is how to >>supress such noise.
Yes the noise is a major pb when switching!
>>I use a relais attenuator with MC for my BZLS.
>>Last rev. does the following:
>- reading rotary encoder and set the 8 relais in range from 0 to 255
I don't need 255 positions I would be happy with 64 or 128 pos...
> - store the last volume used and count up to it after power on
Nice to have...
> - on push function of the encoder change between 2 sources
Nice function ... get only one coder to do the job
> - at source change change the volume setting to the one last used on that >source.
Fine also...
> - from one value up mute between switching the relais. (supresses some >noise)
Well I need to have "no noise" while switching, its very important.
> - at sourcechange mute for short time. (also supresses some noise.
> - at power up wait some time with mute before count up the volume, >choose the last source used.
> - the code tries to minmimize errors from bouncing of encoder switches.
> Its designed for minimal parts and elements at user interface (1 knob) no >fancy features. MC uses internal clock so not much hardware needed.
I have seen your site, great job.
I need to figure out how to suppress all noise from such a design,
because I would prefer a carbon pot like ALPS without noise to a relay
solution that brings noise....
Question:
Do you have a board for programing the device?
How do you put the program on the chip?
Regards.
Alain.
If you could tell me the position you like i can sort out the others for a firmware rev. Alain.
I prefer the fine resolution of 255 steps.
i´m not sure if thios is possible. But if someone tells me how i will implement.
i build a programmer for the PIC
there is a crossassembler on the PC and the code is flahed with the diy programmer.
BobEllis,
Thanks, it cannot be a cap, because it would distord the signal
so the resistor is the great idea.
Thanks for your precious help Bob.
I will install 2*6 relays {to make 2*64 steps} on a PCB with 1% precision attenuation resistors and try a 100K to ground on each signal line.
Will rapidly hear the results... {Hope so !}
PS: What a good memory you have !
And are there better relays for this application: Reed relays with screen or...
Best regards.
Alain.
Thanks, it cannot be a cap, because it would distord the signal
so the resistor is the great idea.
Thanks for your precious help Bob.
I will install 2*6 relays {to make 2*64 steps} on a PCB with 1% precision attenuation resistors and try a 100K to ground on each signal line.
Will rapidly hear the results... {Hope so !}
PS: What a good memory you have !
And are there better relays for this application: Reed relays with screen or...
Best regards.
Alain.
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