|
|
Post by PinkFloyd on Mar 11, 2019 20:11:21 GMT
|
|
|
|
Post by PinkFloyd on Mar 24, 2019 21:09:49 GMT
 Musical Fidelity LX2 HPA Headphone amplifier  Musical Fidelity LX2 HPA Headphone amplifier inside  Musical Fidelity LX2 HPA Headphone amplifier under the bonnet  Musical Fidelity LX2 HPA Headphone amplifier upgrades  Musical Fidelity LX2 HPA Headphone amp  Musical Fidelity LX2 HPA Headphone amplifier Rock Grotto  Musical Fidelity LX2 HPA Headphone amplifier enhanced power supply  Musical Fidelity LX2 HPA Headphone amplifier EPS  Musical Fidelity LX2 HPA Headphone amplifier upgrade power supply  Musical Fidelity LX2 HPA Headphone amplifier EPS  Musical Fidelity LX2 HPA Headphone amplifier EPS |
|
|
|
Post by PinkFloyd on Mar 25, 2019 9:44:58 GMT
|
|
nando
Been here a while! 
The Frying Dutchman
Always look on the bright side of life
Posts: 393 
|
Post by nando on Mar 26, 2019 8:19:56 GMT
Indeed there isn’t much in there.
Can you replace those smd parts?
|
|
bullpup
Been here a while!
How much is that doggy in the window?
Posts: 517
|
Post by bullpup on Apr 8, 2019 17:25:36 GMT
Very interesting however when you consider how cramped for space the x-cans are, it's hard to believe they are the product of the same company!
But the acid test is - how does it sound?
|
|
|
|
Post by PinkFloyd on Apr 8, 2019 19:44:09 GMT
Very interesting however when you consider how cramped for space the x-cans are, it's hard to believe they are the product of the same company! But the acid test is - how does it sound? As per always David, I'm not rushing to any conclusions. I'm trying it with a variety of headphones / music (on and off) and am getting a sonic feel for it. One thing I can say, It's still in my rig and I'm enjoying what it is delivering to my ears so that can only be a good sign  There is an "EPS" switch on the front panel, this stands for "Enhanced Power Supply". Musical Fidelity were going to produce an enhanced power supply for the LX2-HPA which would illuminate the blue EPS LED and unlock the full potential of the LX2-HPA but never got round to it. In laymans terms.... they supplied a shitty unregulated 12V wallwart with the amp. The amp works better with a 24V supply and the "enhanced power supply" LED lights up when you feed it 24V DC The diode array senses 24V and illuminates the magical / hidden "EPS" LED (blue light). It will sense 24V DC whether it's raw 24V DC or Linear / regulated DC and the blue LPS LED will indicate that the full "magic" of the amp has been unlocked. Erm..... no..... this is pretty much pandora's box territory and also unknown consequences when we open the box.... I haven't a clue what the "Musical Fidelity EPS power supply" would be (possibly a switched mode 24V generic Chinese shitfest) but will experiment with a proper linear / regulated power supply and see if that unlocks the full potential of the LX2-HPA. MF are no more, their (Pro-ject Audio / Henley Audio) distributor wrote this to me: Hi Mike,
The external power supply was something that musical fidelity had planned but never brought into production. As you know, MF was purchased by Pro-Ject last year and we currently have no plans to add a power supply option to this series .
Best regards,
Laurence Armstrong.
Oh well........ Let's design a power supply |
|
bullpup
Been here a while!
How much is that doggy in the window?
Posts: 517
|
Post by bullpup on Apr 8, 2019 21:33:23 GMT
Interesting stuff as always Mike
Does your neighbouring friendly farmer have a spare 24v tractor battery?
|
|
bullpup
Been here a while!
How much is that doggy in the window?
Posts: 517
|
Post by bullpup on Apr 8, 2019 21:43:22 GMT
Or a pair of car batteries in series?
|
|
bullpup
Been here a while!
How much is that doggy in the window?
Posts: 517
|
Post by bullpup on Apr 8, 2019 21:59:13 GMT
I was reading a thread elsewhere where John Westlake was recommending Lelon Organics as being the best sounding organics he has ever heard. Worth considering as a potential upgrade for the Wurths?
|
|
nando
Been here a while!
The Frying Dutchman
Always look on the bright side of life
Posts: 393
|
Post by nando on Apr 9, 2019 7:27:40 GMT
Making a power supply is your territory, Mike. Go for it!
|
|
bullpup
Been here a while!
How much is that doggy in the window?
Posts: 517
|
Post by bullpup on Apr 9, 2019 16:59:43 GMT
Making a power supply is your territory, Mike. Go for it! Perhaps I should make it clear, I wasn't doubting Mike's ability, more that I was suggesting an easier route to see if the MF justified the effort!! |
|
nando
Been here a while!
The Frying Dutchman
Always look on the bright side of life
Posts: 393
|
Post by nando on Apr 9, 2019 17:39:58 GMT
Making a power supply is your territory, Mike. Go for it! Perhaps I should make it clear, I wasn't doubting Mike's ability, more that I was suggesting an easier route to see if the MF justified the effort!! I wasn't either. Hell no, I would not dare. |
|
|
|
Post by stdik on May 11, 2019 20:32:16 GMT
I've just purchased one of these Headphone Amps and I am very impressed with the sound on initial listening. I came across this thread and wondered if there was any follow up in respect of trying a 24V linear / Regulated PSU with it.
Thanks
|
|
|
|
Post by PinkFloyd on May 12, 2019 19:21:35 GMT
Welcome to the forum!
I've been experimenting with quite a few things regarding the LX2 HPA, give me another month or two.
All the best,
Mike.
|
|
|
|
Post by stdik on May 13, 2019 19:53:59 GMT
Welcome to the forum! I've been experimenting with quite a few things regarding the LX2 HPA, give me another month or two. All the best, Mike. Thanks very much for the reply and the welcome. I have ordered an off the shelf 24V 2.7A 65W Switching AC/DC Power Supply just to give it a go to listen if there are any positive outcomes. |
|
|
|
Post by stdik on Sept 23, 2019 19:34:56 GMT
Welcome to the forum! I've been experimenting with quite a few things regarding the LX2 HPA, give me another month or two. All the best, Mike. Hi again, Im just wondering whether you pursued any upgrades with the amp andif so what your thoughts / findings are? All the best |
|
|
|
Post by puggie on Sept 25, 2019 17:26:16 GMT
I noticed the statement:
"The surface mount element of the componentry essentially dictates that the LX2-HPA has not been engineered to last a lifetime (ie: be a serviceable unit) BUT the parts that have been fitted are generally good quality and should last a good few years."
Why do you assume this? I find SMD component quite easy to replace in most cases. With through hole components it is much easier to damage the pcb by overheating, damage through hole plating when removing components. With SMD you can just heat gun the area and pick components off with tweezers, wick the pads clear of excess solder then drop a new component on. The problematic devices are those that are bonded on, or those with pads under the chip out of sight. Oh and some are stupidly small.
|
|
|
|
Post by PinkFloyd on Sept 26, 2019 11:39:39 GMT
"The problematic devices are those that are bonded on, or those with pads under the chip out of sight. Oh and some are stupidly small."
Generally easy to work with (if you have good eyesight, a steady hand, good soldering / desoldering skills and all the relevant tools) but, as you say, there can be problematic devices. I was pointing out that the average hobbyist would possibly find it a lot easier to work with traditional components and to identify parts values. The LX2 HPA circuit board is beautifully laid out but would be a bitch to work on if you weren't used to working with SMD components.
Mike.
|
|
|
|
Post by puggie on Sept 27, 2019 7:45:26 GMT
"The problematic devices are those that are bonded on, or those with pads under the chip out of sight. Oh and some are stupidly small."Generally easy to work with (if you have good eyesight, a steady hand, good soldering / desoldering skills and all the relevant tools) but, as you say, there can be problematic devices. I was pointing out that the average hobbyist would possibly find it a lot easier to work with traditional components and to identify parts values. The LX2 HPA circuit board is beautifully laid out but would be a bitch to work on if you weren't used to working with SMD components. Mike. Identifying parts values, I'll give you that one I HATE SMD caps for having no indication of what they are at all. I'm working in a university and I've noticed over probably the last 10 years that those who hack circuitry are generally now working in SMD in preference to through hole, mainly to availability and cost of parts (I noticed some op-amps I wanted were half the cost in SMD compared to DIL8) is the thing that starts the move to SMD, but once the relatively simple skills have been learned there tends to be a preference to use SMD where possible. Anyway that headphone amp is very nice and simple if someone wanted to start rolling different op-amps into it. you can even get nice little adapters to take those the DIL8 pin sockets if you wanted! |
|
|
|
Post by PinkFloyd on Jan 31, 2020 20:02:57 GMT
.....
|
|
FritzS
Been here a while!
Sound of Blue Danube
Sound of Blue Danube
Posts: 1,364
|
Post by FritzS on Feb 3, 2020 7:05:01 GMT
I think it gives better OPAs then NE5532. Bad, that they soldered SOIC. The output stages looks like a Walt Jung diamond buffer? Or looking more an WNA MKII?
How is the rail splitting solved?
|
|
