[stau]

I did test the hi-fi amplifier + lovely cube

1 out of the amplifier chinch> lovely cube
2 out headphone output <lovely cube

and found that I had the headphone amplifier output of more bass than the chinch

 

[francisdemarte]

Okay I understand now, chinch = RCA connectors to us Americans. So the line out from your hi-fi has less bass then the headphone out of your hi-fi. 
 
So there is bass roll off from the line out of the hi fi amplifier or else the hi fi's headphone amplifier is pumping up the bass. You probably do not want to use your hi fi's headphone out because then you will be amplifying the signal twice.
 
Find out why there is less bass on your hi fi's line out when connected to the Lovely Cube. What is in front of the hi fi amplifier (CD/DVD/turntable/computer?) Can you connect the Lovely Cube directly to it?
 
What brand / model is your hi fi?
 
  
 
 
 

 

[Cya|\|]

Quote:

Are you using the stock opamp? IMO, there is quite a bit of bass in the OPA2134 but it's bloated, not precise and doesn't go very deep. There are many other better opamps for much deeper and better bass.

627.
Is there a difference between the 2 plugs?
Unfortunately i don´t have a screw, so i cannot even change the gain to 10.

 

[aspenx]

Quote:

627.
Is there a difference between the 2 plugs?
Unfortunately i don´t have a screw, so i cannot even change the gain to 10.

You mean a difference between the 2 sockets? The 2 sockets produce the same output. The one nearer to the potentiometer goes directly to the "output" which I suppose you have left unconnected.
 
Why would you need a screw to change the gain? You could just flip the unit over and use your fingers?
 
I'm using 2x LT1363. The bass goes deeper and it's more precise. Although the quantity of the overall bass is less than the OPA627, the quality makes up for it. I don't know if that's what you're looking for but you could try out a LT1364 for pretty cheap if you need to.

 

[Cya|\|]

Quote:

You mean a difference between the 2 sockets? The 2 sockets produce the same output. The one nearer to the potentiometer goes directly to the "output" which I suppose you have left unconnected.
 
Why would you need a screw to change the gain? You could just flip the unit over and use your fingers?
 
I'm using 2x LT1363. The bass goes deeper and it's more precise. Although the quantity of the overall bass is less than the OPA627, the quality makes up for it. I don't know if that's what you're looking for but you could try out a LT1364 for pretty cheap if you need to.

I mean, how do i open the case to change the gain without screw?

 

[DaEMoNteNTAcLe]

@dlalom
thx for the info.. didnt know headphone impedance affects.
 
@aspenx
2x LT1363 = less bass and better quality? how so? mind sharing more details coz i think the bass is still too much on the 627, biased or not.. kinda bloated in a sense, at least.. for my cans.

 

[aspenx]

Quote:

@aspenx
2x LT1363 = less bass and better quality? how so? mind sharing more details coz i think the bass is still too much on the 627, biased or not.. kinda bloated in a sense, at least.. for my cans.

 
Yea, I agree with you about the OPA627. I'm using the 2x LT1363 with no biasing. It is even better than the LT1364, biased or not. My JFETs just arrived yesterday. I'll be trying a more proper bias underboard when I get home. Will let you know more after I give the current setup a little more listening later.
 
Have you tried the amp with LT1364?

 

[DaEMoNteNTAcLe]

Quote:

Quote:

@aspenx
2x LT1363 = less bass and better quality? how so? mind sharing more details coz i think the bass is still too much on the 627, biased or not.. kinda bloated in a sense, at least.. for my cans.

 
Yea, I agree with you about the OPA627. I'm using the 2x LT1363 with no biasing. It is even better than the LT1364, biased or not. My JFETs just arrived yesterday. I'll be trying a more proper bias underboard when I get home. Will let you know more after I give the current setup a little more listening later.
 
Have you tried the amp with LT1364?

 

[size=medium]

nope. gotta find one. i know where to find lt1361 here, but not lt1363 or 1364.
isnt lt1363 just a single channel version of the lt1364? hm...
i think im gonna try it later once i know where to find them.
anyways good luck on ur mods.
​

[/size]

 

[T.IIZUKA]

Arrived!
 
Talema 30VA Toroidal was printed with the name.
 

 
 
RCA Connector
 

 
 
 

[size=medium] First. [/size]
[size=medium] The sound is good.  ＼(^o^)／[/size]
[size=medium] It is happy to do barn-in. [/size]

 
Right channel RCA connectors on the bottom.
Channel had been left a red mark.
Initially, the left and right a wrong connection.
 
 
 
The screw that fixes a right side doesn't shut. 
Right-side head of the screws on the metal case was burred.
Recommended to increase the thickness or welded nut.
It can be implemented cost is up slightly.
 
 
Posted on Blog. (Sorry, Japanese-text only)
http://tiiduka.blogspot.com/2010/11/lovely-cube-headamp-5.html

 

[Cya|\|]

I´ve lowered the gain from 20db to 10db. Only change was the volume. But maybe the background is cleaner.

 

[stau]

"Initially, the left and right a wrong connection."
 
 
have you re-soldered OUT

 

[T.IIZUKA]

Quote:

I´ve lowered the gain from 20db to 10db. Only change was the volume. But maybe the background is cleaner.

 
I have a comfortable volume.
What RK27 traded?

 

[Cya|\|]

Quote:

Quote:

I´ve lowered the gain from 20db to 10db. Only change was the volume. But maybe the background is cleaner.

 
I have a comfortable volume.
What RK27 traded?

 
Sorry, I don´t understand what you said.
I have a steppet potentiometer, one that the amp seller sells (you can find them in his ebay shop). I only paid +10$ for the stepped pot, and I´m happy I made that decision.
 

 

[ViciousXUSMC]

What do you guys think of the "economy edition"
 
http://cgi.ebay.com/LOVELY-CUBE-Headphone-Amplifier-KIT-Economy-Edition-/200541739530?pt=LH_DefaultDomain_0&hash=item2eb1381a0a
 
its not the same board and no opamp but other than that its the same right?
 
looks like a good soldering project for me.

 

[T.IIZUKA]

Quote:

Quote:

Quote:

I´ve lowered the gain from 20db to 10db. Only change was the volume. But maybe the background is cleaner.

 
I have a comfortable volume.
What RK27 traded?

 
Sorry, I don´t understand what you said.
I have a steppet potentiometer, one that the amp seller sells (you can find them in his ebay shop). I only paid +10$ for the stepped pot, and I´m happy I made that decision.
 

 
Sorry, "volume" is potentiometer.
RK27 is a potentiometer that has adhered to Lovely Cube. (ALPS RK27)