I couldn't help it Tony, just reminded me of "The Big Labowski"
Of course I'm just kidding. It is meant in jest
IPS (Input Section or Input Stage)
OPS (Output Section or Output Stage)
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Well, excuuuuse me... but now I'm not a child. better to ask simple questions that to read a hundred posts and not understand what they are talking about.
Now, it does make sense.
But a switch that changes/selects the input buffer, that almost calls for a cage design with plug in boards. Won't that add noise?
BTW, isn't the IPS for an amp the same as the FE (front end). As in amplifiers having an FE and and OP?
Now, it does make sense.
But a switch that changes/selects the input buffer, that almost calls for a cage design with plug in boards. Won't that add noise?
BTW, isn't the IPS for an amp the same as the FE (front end). As in amplifiers having an FE and and OP?
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Sorta but not really. M2x has a somewhat rare topology and the IPS are all buffers.
Yes, Input Stage == IPS == small daughter card for M2x.
I only began to emphasize this vigorously, when the first non-diyAudio-Store daughter cards appeared. Unlike the original five daughter cards shipped from the Store (Austin, Tucson, etc.), I intentionally gave the next two daughter cards names that were devoid of meaning and hopelessly generic. Thus "IPS6" and "IPS7" were born. Long term M2x builders and enthusiasts experienced this in real time, and I imagine they've remembered IPS from waaaay back. For the newcomers: welcome! Allow me to explain that on this M2x thread, IPS means Input Stage. Your M2x Amp Channel PCBs have a silkscreen rectangle marked INPUT STAGE MODULE BOLTS HERE. That's where you mount the IPS cards you've assembled.
The EDCOR PC600-15K cannot be bought anywhere in Europe and Erdcor does not want to ship to Germany. Are there any possible replacements that can be used that are available in Europe?
I also found it, but I don't know if it's a reliable source and the shipping time is 2 months.
Yes, they are, absolutely.
Okay, you have to wait for the Edcors 2 months, but you'll get it.
Just bought again a pair of Cinemags from Don Audio. They also stated two months to delivery, but in the end it took less than four weeks.
Regards, Claas
Regards, Claas
Good afternoon everyone.
I recently built this absolute beauty of an amp, and someone mentioned Edcor is not selling the input transformer. It is indeed true since I waited three months don audio from Germany to ship the transformers.
After a couple emails where they were saying they were having some challenges with Edcor I just gave up, ordered the 0.5w version of the trannies, got them delivered after 3 days, and mounted them on standoffs. Oh well..
300vac 2x18v transformer from toroidy, chassis from AliExpress, psu board and mosfets from R. Thatcher on Etsy, jfets from diyaudio store, critical resistors matched to 0.001 ohm, biased within a couple millivolts, it sounds so good I might sell my 300b mono blocks.
One question:
Im using the ishikawa daughter board with the green bipolar capacitor installed. I measured the dc voltage before the cap, and its around 6-7 millivolts. Would that be a concern if I decided to remove the cap?
I recently built this absolute beauty of an amp, and someone mentioned Edcor is not selling the input transformer. It is indeed true since I waited three months don audio from Germany to ship the transformers.
After a couple emails where they were saying they were having some challenges with Edcor I just gave up, ordered the 0.5w version of the trannies, got them delivered after 3 days, and mounted them on standoffs. Oh well..
300vac 2x18v transformer from toroidy, chassis from AliExpress, psu board and mosfets from R. Thatcher on Etsy, jfets from diyaudio store, critical resistors matched to 0.001 ohm, biased within a couple millivolts, it sounds so good I might sell my 300b mono blocks.
One question:
Im using the ishikawa daughter board with the green bipolar capacitor installed. I measured the dc voltage before the cap, and its around 6-7 millivolts. Would that be a concern if I decided to remove the cap?
So I’ve had some time to listen and enjoy my m2. Super pleased with it - sounds great!
I’m curious what folks thoughts are on the different input stages. How dependent are the input stages to the listener? To the speakers? To the preamp?
So far i have listened to the ishikawa and now the milpitas. I don’t hear any difference. They both sound fine to me!
Does my hearing just suck? Some other factor? Or are the differences between the different boards just really subtle?
Just curious. I’m just happy having a nice amp!
I’m curious what folks thoughts are on the different input stages. How dependent are the input stages to the listener? To the speakers? To the preamp?
So far i have listened to the ishikawa and now the milpitas. I don’t hear any difference. They both sound fine to me!
Does my hearing just suck? Some other factor? Or are the differences between the different boards just really subtle?
Just curious. I’m just happy having a nice amp!
Hello bilsch,
my experience with the input-buffers is, that the differences are subtle but audible. It also depends on the rest of your system.
If you change the speakers in your system - I think this will have a bigger effect - depending on the speakers.
And as always: sound is also a question of taste...
Cheers
Dirk
my experience with the input-buffers is, that the differences are subtle but audible. It also depends on the rest of your system.
If you change the speakers in your system - I think this will have a bigger effect - depending on the speakers.
And as always: sound is also a question of taste...
Cheers
Dirk
Taking an idea from the AKSA-Lender preamplifier, one could imagine an interface board with the same form factor as an existing IPS.
But instead of components for a stage on its surface, there are:
- N 4-pin sockets/headers that could hold N new IPS boards perpendicularly.
- connections to allow for a 2-gang switch that selects which board received the incoming signal
Leaving all N boards powered may or may not be a good idea, but I was thinking that finding a 4-way switch might be prohibitively expensive. Likely dozens of other problems I cannot ken.
Kind regards,
Drew
