Mod your Beresford 7520

[lupo_yellow]

Thanks for that Stan.
It is fantastic that I can get advice from the manufacturer of this DAC.
I can't imagine getting a reply from the boss of Sony if I asked a question

Kevin.

PS Do I need to remove any capacitors when just using the headphone output?

[sum1]

Anyone here ended up trying LME49860 with the 7520.
LME49860 is supposed to the the same as LM4562 but its said to sound better than it. I guess its kinda like how metal can LM4562 is said to sound better than the plastic ones.

[HighFidelityGuy]

Hi chaps, it's been a while since I checked in here and it seems like some good progress has been made.

I've got a question about the MLC5/MLC6 mod: Is this mod likely to improve the sound of the 49720 metal cans seen as they are very similar to the LM4562?

Thanks.

[lovejoy]

I am quite surprised how much the op-amps interact with one another.

I took delivery of my OPA2107s today and have just spent the last hour trying them out. At first I just fitted one to the line output and left the headphone op-amp side with my trusty LM4562. Played a couple of songs and it just sounded dull with some serious roll off in the treble. So out of curiosity I put the other 2107 into the headphone socket and hey presto - the treble and the life returns. It's certainly the smoothest and warmest of the chips I've tried so far but I think the bass is over emphasised, but this is with the two caps MLC5/6 removed which may have a bearing on this. I shall give it some more time over the weekend for a more extended listen.

[leo]

Hi chaps, it's been a while since I checked in here and it seems like some good progress has been made.

I've got a question about the MLC5/MLC6 mod: Is this mod likely to improve the sound of the 49720 metal cans seen as they are very similar to the LM4562?

Thanks.

The internal structure/topology of those op-amps is the same so this mod should work just fine

Infact apart from the name I can't see any difference

[HighFidelityGuy]

The internal structure/topology of those op-amps is the same so this mod should work just fine

Infact apart from the name I can't see any difference

Thanks Leo, I thought that would be the case. I think the 49720's are just a renamed version of the metal can version of the LM4562. I might give this a try to see how it compares against the THS4032 which is my current favourite.

I really wish I had a spare opamp board so I could do a quick swap between various opamps and mods. As I mentioned before it would be great if we could buy these separately.

[StanleyB]

I really wish I had a spare opamp board so I could do a quick swap between various opamps and mods. As I mentioned before it would be great if we could buy these separately.

I am organizing this. Hopefully I shall have it sorted in July. I want to add some mods on that spare PCB as well. Just need to find a nice little box to pack it in properly, and do a set of fitting instructions.

Stan

[HighFidelityGuy]

I am organizing this. Hopefully I shall have it sorted in July. I want to add some mods on that spare PCB as well. Just need to find a nice little box to pack it in properly, and do a set of fitting instructions.

Stan

Fantastic, nice one Stan! This will be so useful.
In that case I'll wait until these are available before I start de-soldering caps.
Do you know roughly how much you'll be selling these for yet?

Thanks!

[StanleyB]

Do you know roughly how much you'll be selling these for yet?

Nope. I don't want to grab a ficticious figure out of the air, and take my fan base to the cleaners. I have to find out how much tax etc I have to pay on it. My wish is for it to be less than £40 delivered to anywhere in the world, or less than £30 to anywhere in Europe.

Stan

[HighFidelityGuy]

Nope. I don't want to grab a ficticious figure out of the air, and take my fan base to the cleaners. I have to find out how much tax etc I have to pay on it. My wish is for it to be less than £40 delivered to anywhere in the world, or less than £30 to anywhere in Europe.

Stan

Ok, that's fair enough. Thanks for the ballpark figures.

Cheers.