In support of M2x
UFSP with Clarity Cap CMR in C3, DCG3 with DCSTB and TKD attenuator (not happy with TKD), have muses unstuffed. All parts stock thru Tea, All Antek trafos at design voltage. MJ's switches and SLB PSU's. Everything Quasimodo that will take it. AT 33PTG-2 cart. Unrecapped SP-10 with obsidian plinth. Short list for new changes, UBiB for DCG3, Muses for same, Hana Cart, OSMC and probably some IPS6 and 7 reviews as cards are built. I have an intermediate list that includes TT stuff, continuing box cleanup and trying to build a library of great pressings. All designed to get the most out of the M2x. Must keep the music playing along the journey. Took me too long to get the first notes out.
Treble trim?
Always open to great ideas
Thanks for pressing tip.
R,
Don
UFSP with Clarity Cap CMR in C3, DCG3 with DCSTB and TKD attenuator (not happy with TKD), have muses unstuffed. All parts stock thru Tea, All Antek trafos at design voltage. MJ's switches and SLB PSU's. Everything Quasimodo that will take it. AT 33PTG-2 cart. Unrecapped SP-10 with obsidian plinth. Short list for new changes, UBiB for DCG3, Muses for same, Hana Cart, OSMC and probably some IPS6 and 7 reviews as cards are built. I have an intermediate list that includes TT stuff, continuing box cleanup and trying to build a library of great pressings. All designed to get the most out of the M2x. Must keep the music playing along the journey. Took me too long to get the first notes out.
Treble trim?
Always open to great ideas
Thanks for pressing tip.
R,
Don
UFSP with Clarity Cap CMR in C3, DCG3 with DCSTB and TKD attenuator (not happy with TKD), have muses unstuffed. All parts stock thru Tea, All Antek trafos at design voltage. MJ's switches and SLB PSU's. Everything Quasimodo that will take it. AT 33PTG-2 cart. Unrecapped SP-10 with obsidian plinth. Short list for new changes, UBiB for DCG3, Muses for same, Hana Cart, OSMC and probably some IPS6 and 7 reviews as cards are built. I have an intermediate list that includes TT stuff, continuing box cleanup and trying to build a library of great pressings. All designed to get the most out of the M2x. Must keep the music playing along the journey. Took me too long to get the first notes out.
Treble trim?
Always open to great ideas
Thanks for pressing tip.
R,
Don
Can you give me the decryption key so I can understand the post?
Maybe in morphs into a picture of...a sexy amp?
LOL.
A seriously fine preamp worth consideration:
Salas DCG3 preamp (line & headphone)
And a seriously amazing phono pre for vinyl incredibleness:
Simplistic NJFET RIAA
...Back to M2X brillianceness
A seriously fine preamp worth consideration:
Salas DCG3 preamp (line & headphone)
And a seriously amazing phono pre for vinyl incredibleness:
Simplistic NJFET RIAA
...Back to M2X brillianceness
Hi folks, made a mistake in populating the boards, put a 47R instead of 47K in R6 and R7. Ugh... Saw 15V on outputs and some smoke and killed power right away, but I am guessing I need to replace the output FETs. Fortunately only fired up one channel, but anything else that should be changed? Thanks!
> A seriously fine preamp worth consideration ...
Try this one in comparison :
A Battery-Powered Class A Headphone Amp | audioXpress
The Borbely EB602-200 Revisited
(Mr. Borbely's original design.)
Patrick
Try this one in comparison :
A Battery-Powered Class A Headphone Amp | audioXpress
The Borbely EB602-200 Revisited
(Mr. Borbely's original design.)
Patrick
Please evaluate the sound of new M2x circuitry
I'm seeking volunteers to help me perform listening auditions / evaluations of new M2x daughter card configurations.
The listening tests will use the IPS7 circuit board, plus a cadre of unusual opamps that are seldom/never deployed in M2x's ... because they're surface mount parts (SOIC-8). However, I've soldered the opamp chips on SOIC-to-DIP adapters for these experiments, so they function as DIP-8s and thus are 100% compatible with IPS7 boards.
None of the opamps used in these tests are unknown or mysterious; every one of them is available worldwide, and their excellent datasheet specifications are published globally. Despite this, nobody has tried ANY of them in an M2x amplifier as far as I can tell, either with a Tucson or an IPS7 or anything else. I searched this thread for each of the part numbers and came up empty, every time.
So, I'd like to get the evaluations and critiques and opinions and listening evaluations of other M2x owners, and find out if one or more of these chips give terrific sound for YOU. As the designer and experiment-creator, I might fall victim to "Proud Parent bias", but YOU probably don't. So your opinions and evaluations are probably less biased (more objective) than mine.
IF YOU'RE INTERESTED
Please PM me if, and only if, you can truthfully promise that you'll evaluate two different opamp types, in your IPS7 boards, in your M2x, within four weeks of receiving the chips. And then write up your impressions and evaluation results as a post in this thread. (Slowpokes are undoubtedly wonderful human beings, but they're not my first choice for this experiment.)
Hopefully you'll discover a hidden gem, and your findings will help steer other M2x owners toward a new avenue for great sound using the IPS7 board. Then everybody will benefit from your experiences.
I'm not going to say anything specific about the chips which are (or are not!) part of the experiment. I don't want to prejudice the listeners or to pre-bias their opinions.
Naturally the opamps and adapters will be yours to keep after the evaluation is complete.
Thanks for reading this!
I'm seeking volunteers to help me perform listening auditions / evaluations of new M2x daughter card configurations.
The listening tests will use the IPS7 circuit board, plus a cadre of unusual opamps that are seldom/never deployed in M2x's ... because they're surface mount parts (SOIC-8). However, I've soldered the opamp chips on SOIC-to-DIP adapters for these experiments, so they function as DIP-8s and thus are 100% compatible with IPS7 boards.
None of the opamps used in these tests are unknown or mysterious; every one of them is available worldwide, and their excellent datasheet specifications are published globally. Despite this, nobody has tried ANY of them in an M2x amplifier as far as I can tell, either with a Tucson or an IPS7 or anything else. I searched this thread for each of the part numbers and came up empty, every time.
So, I'd like to get the evaluations and critiques and opinions and listening evaluations of other M2x owners, and find out if one or more of these chips give terrific sound for YOU. As the designer and experiment-creator, I might fall victim to "Proud Parent bias", but YOU probably don't. So your opinions and evaluations are probably less biased (more objective) than mine.
IF YOU'RE INTERESTED
Please PM me if, and only if, you can truthfully promise that you'll evaluate two different opamp types, in your IPS7 boards, in your M2x, within four weeks of receiving the chips. And then write up your impressions and evaluation results as a post in this thread. (Slowpokes are undoubtedly wonderful human beings, but they're not my first choice for this experiment.)
Hopefully you'll discover a hidden gem, and your findings will help steer other M2x owners toward a new avenue for great sound using the IPS7 board. Then everybody will benefit from your experiences.
I'm not going to say anything specific about the chips which are (or are not!) part of the experiment. I don't want to prejudice the listeners or to pre-bias their opinions.
Naturally the opamps and adapters will be yours to keep after the evaluation is complete.
Thanks for reading this!
Sadly, I suck at listening impressions, unless the differences are large. Besides, if I have that kind of time in the next few weeks, I will be doing an IPS6 build. The rest of my parts came in today.
Your SOIC opamps sound cool though, I look forward to the reviews. I would, of course have to compare them to Cedarburg. (Heh, it is the last board I built!)
Your SOIC opamps sound cool though, I look forward to the reviews. I would, of course have to compare them to Cedarburg. (Heh, it is the last board I built!)
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i have listening the M2x for month and was not impress at all about his sound,
so i put it in my garage and return to my beloved tube SET , my moded alpeh 3 was better too ..
than last week i just realise that i had the two input transfomer mounted in the wrong side Damn !
i feel sorry for Mr Pass and Mark spending their precious time to elaborate fine Diy products just to be ruined by a french fart
so i'm sorry but will Not be volunteerfor the evaluation of the new daughter..
so i put it in my garage and return to my beloved tube SET , my moded alpeh 3 was better too ..
than last week i just realise that i had the two input transfomer mounted in the wrong side
Damn !i feel sorry for Mr Pass and Mark spending their precious time to elaborate fine Diy products just to be ruined by a french fart
so i'm sorry but will Not be volunteerfor the evaluation of the new daughter..
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Please evaluate the sound of new M2x circuitry
I'm seeking volunteers to help me perform listening auditions / evaluations of new M2x daughter card configurations.
The listening tests will use the IPS7 circuit board, plus a cadre of unusual opamps that are seldom/never deployed in M2x's ... because they're surface mount parts (SOIC-8). However, I've soldered the opamp chips on SOIC-to-DIP adapters for these experiments, so they function as DIP-8s and thus are 100% compatible with IPS7 boards.
None of the opamps used in these tests are unknown or mysterious; every one of them is available worldwide, and their excellent datasheet specifications are published globally. Despite this, nobody has tried ANY of them in an M2x amplifier as far as I can tell, either with a Tucson or an IPS7 or anything else. I searched this thread for each of the part numbers and came up empty, every time.
So, I'd like to get the evaluations and critiques and opinions and listening evaluations of other M2x owners, and find out if one or more of these chips give terrific sound for YOU. As the designer and experiment-creator, I might fall victim to "Proud Parent bias", but YOU probably don't. So your opinions and evaluations are probably less biased (more objective) than mine.
IF YOU'RE INTERESTED
Please PM me if, and only if, you can truthfully promise that you'll evaluate two different opamp types, in your IPS7 boards, in your M2x, within four weeks of receiving the chips. And then write up your impressions and evaluation results as a post in this thread. (Slowpokes are undoubtedly wonderful human beings, but they're not my first choice for this experiment.)
Hopefully you'll discover a hidden gem, and your findings will help steer other M2x owners toward a new avenue for great sound using the IPS7 board. Then everybody will benefit from your experiences.
I'm not going to say anything specific about the chips which are (or are not!) part of the experiment. I don't want to prejudice the listeners or to pre-bias their opinions.
Naturally the opamps and adapters will be yours to keep after the evaluation is complete.
Thanks for reading this!
I'm seeking volunteers to help me perform listening auditions / evaluations of new M2x daughter card configurations.
The listening tests will use the IPS7 circuit board, plus a cadre of unusual opamps that are seldom/never deployed in M2x's ... because they're surface mount parts (SOIC-8). However, I've soldered the opamp chips on SOIC-to-DIP adapters for these experiments, so they function as DIP-8s and thus are 100% compatible with IPS7 boards.
None of the opamps used in these tests are unknown or mysterious; every one of them is available worldwide, and their excellent datasheet specifications are published globally. Despite this, nobody has tried ANY of them in an M2x amplifier as far as I can tell, either with a Tucson or an IPS7 or anything else. I searched this thread for each of the part numbers and came up empty, every time.
So, I'd like to get the evaluations and critiques and opinions and listening evaluations of other M2x owners, and find out if one or more of these chips give terrific sound for YOU. As the designer and experiment-creator, I might fall victim to "Proud Parent bias", but YOU probably don't. So your opinions and evaluations are probably less biased (more objective) than mine.
IF YOU'RE INTERESTED
Please PM me if, and only if, you can truthfully promise that you'll evaluate two different opamp types, in your IPS7 boards, in your M2x, within four weeks of receiving the chips. And then write up your impressions and evaluation results as a post in this thread. (Slowpokes are undoubtedly wonderful human beings, but they're not my first choice for this experiment.)
Hopefully you'll discover a hidden gem, and your findings will help steer other M2x owners toward a new avenue for great sound using the IPS7 board. Then everybody will benefit from your experiences.
I'm not going to say anything specific about the chips which are (or are not!) part of the experiment. I don't want to prejudice the listeners or to pre-bias their opinions.
Naturally the opamps and adapters will be yours to keep after the evaluation is complete.
Thanks for reading this!
Mark must have created a major global parts shortage with the release of the Cedarburg. I had to shop around to find parts. I checked Octopart but couldn't find one transistor, D45H11G, in stock in the US from a company that didn't sell in large lots. Other companies ship them from abroad and estimated times are measured in months.
I thought I had D45H11G in stock but there was only one left in the bag. Drat! Can anybody sell me 3 of them if I pay for the transistors and shipping?
Thanks
I thought I had D45H11G in stock but there was only one left in the bag. Drat! Can anybody sell me 3 of them if I pay for the transistors and shipping?
Thanks
Switched on my M2X today and it didn't get warm, opened it up to find the left channel -ve out from the psu a bit burnt and R14 on LH amp slightly brown. I measured Q2 with my DMM and D and G read OL both ways on diode range, G wrt D on ohms is 46.5 k ohms and 47.4K the other way. Any idea what could be wrong and any other checks to carry out?
...
what I've read, some people would like to order the PCB's for the amplifier.
But they can't because it has been sold out since autumn 2020.
I have no problems paying money for the Gerber files and then taking care of ordering the PCBs myself so that I can build 2 amplifiers in 2021.
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Beautiful work, banderson546! Congratulations. Looks like you've got a "mixed marriage" of power transistors. The one at top left has chamfered corners on the mounting tab, while the one at bottom right has square corners. Maybe one is STMicroelectronics and the other is ONSemiconductor? It's nothing to worry about, that'll work fine.