Digitally controlled preamp/headphone amp - Page 70 - diyAudio
Go Back   Home > Forums > Amplifiers > Headphone Systems

Headphone Systems Everything to do with Headphones

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 3rd September 2006, 11:39 AM   #691
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: London
Quote:
Originally posted by BrianDonegan
Nice. I like how you mounted the pot/switches. Might try that approach myself. Is there any echo in that case?
Cheers. Yeah they don't exactly fill the space. I was thinking of replacing the Kook with a tube stage and a Joshua Tree but I don't know if I have time to build that
  Reply With Quote
Old 3rd September 2006, 12:36 PM   #692
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Max, that thing looks sweeeeeet! Good work!

If you really feel up to it, later you could keep the kookaburra in there for headphone use, and add a JT + Twisted Sibling preamp. There is certainly plenty of room in the case. The beauty of that is you could have both singled ended and balanced outputs.

Cheers!
Russ
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 3rd September 2006, 12:45 PM   #693
diyAudio Member
 
maxlorenz's Avatar
 
Join Date: Oct 2003
Location: osorno , Chile
Congratulations, maxw
Very good looking!
I wish I had access to better machines to get that kind of exactness to the cuts...

Tips that worked for me, soundwise:
* direct solder wire to PCB and avoid these tinny connectors.
* make one "ground bar" to connect all ins/outs connectors and then from there, only one connection to PCB ground. That avoided hum on my crossover+preamp (>100dB efficient speakers )

To be tried:
* R-core transformers.
* Replace all Panasonic FCs for Rubicon ZL/ZA in all twisteadpearaudio roducts; Farnell asks me 26GBP, only for shipment
(definitelly, I can't get used to Pana's sound )

Quote:
Yeah they don't exactly fill the space.
Or...you could put your reserve of beer there

Cheers,
M
  Reply With Quote
Old 3rd September 2006, 02:01 PM   #694
diyAudio Member
 
BrianDonegan's Avatar
 
Join Date: Dec 2004
Location: TPA HQ
Quote:
* make one "ground bar" to connect all ins/outs connectors and then from there, only one connection to PCB ground. That avoided hum on my crossover+preamp
Interesting that that helped. It is essentially what the Darwin ground scheme does (single ground buss for all input/output connectors). Glad the hum is gone though, whatever it takes...
__________________
Twisted Pear Audio
  Reply With Quote
Old 4th September 2006, 10:06 AM   #695
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: London
Quote:
Originally posted by Russ White
Max, that thing looks sweeeeeet! Good work!

If you really feel up to it, later you could keep the kookaburra in there for headphone use, and add a JT + Twisted Sibling preamp. There is certainly plenty of room in the case. The beauty of that is you could have both singled ended and balanced outputs.

Cheers!
Russ
Well, I can't do that until it's released now can I?


Quote:
Originally posted by maxlorenz
Congratulations, maxw
Very good looking!
I wish I had access to better machines to get that kind of exactness to the cuts...

Tips that worked for me, soundwise:
* direct solder wire to PCB and avoid these tinny connectors.
* make one "ground bar" to connect all ins/outs connectors and then from there, only one connection to PCB ground. That avoided hum on my crossover+preamp (>100dB efficient speakers )

To be tried:
* R-core transformers.
* Replace all Panasonic FCs for Rubicon ZL/ZA in all twisteadpearaudio roducts; Farnell asks me 26GBP, only for shipment
(definitelly, I can't get used to Pana's sound )


Or...you could put your reserve of beer there

Cheers,
M
Thanks Max! (good name you have!)
I don't get any hum at all but I'll probably solder all the connections once its finished
  Reply With Quote
Old 4th September 2006, 03:54 PM   #696
diyAudio Member
 
maxlorenz's Avatar
 
Join Date: Oct 2003
Location: osorno , Chile
Quote:
Thanks Max! (good name you have!)
As nobody never asks, I have to say that this is not my real name but the name of my favorite wagnerian "helden tenor"
wich can be seen on the avatar (if this the name the photo has)

All the best,
Mauricio
  Reply With Quote
Old 5th September 2006, 05:42 PM   #697
KOHTOPA is offline KOHTOPA  Europe
diyAudio Member
 
Join Date: Mar 2006
Location: us
maxw,

That's cool enclosure. A lot of room for add ons
Right now I'm also trying to make three separate
aluminium enclosures:
- power amp
- pre-amp + DAC
- micro-ATX computer
They should have the same form-factor (stack on each
other) and cost not more than $100-$150 each.
I think everyone agrees that enclosure takes about
80% of time/efforts/money in a finished product

Some questions:
- Did you cut aluminium yourself or you just buy pre-cut
sheets? Could you share the source?
- Did you make round holes in the front-panel yourself?
- Where did you buy so nice illuminated controls?

Thanks in advance!
  Reply With Quote
Old 6th September 2006, 12:01 AM   #698
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: London
Quote:
Originally posted by KOHTOPA
Some questions:
- Did you cut aluminium yourself or you just buy pre-cut
sheets? Could you share the source?
I bought the sides as flatbar which you buy by the meter, then asked them to cut it to my requirements. You pay a cutting fee per cut they make for you.
The top and bottom were bought from a sheet metal shop who cut it to size with a guilotine.
The sources are shops in New Zealand so probably not much use. Just find a place that sells metal locally and ask them if they can cut it accurately for you.

Quote:
Originally posted by KOHTOPA
- Did you make round holes in the front-panel yourself?
Nope, they were too big for a hole saw so I got an engineer to do it with a machine. It cost about $20USD to get the holes for the volume and source selector made.

Quote:
Originally posted by KOHTOPA
- Where did you buy so nice illuminated controls?
The knobs are from http://www.thlaudio.com/indexE.htm
The pot and rotary switch are mounted on a transparent plastic panel behind the alu front with some LEDs behind it so that it iluminates around the knobs. So, I made the illumination my self
  Reply With Quote
Old 6th September 2006, 01:15 AM   #699
KOHTOPA is offline KOHTOPA  Europe
diyAudio Member
 
Join Date: Mar 2006
Location: us
>Nope, they were too big for a hole saw so I got an engineer to do it
>with a machine. It cost about $20USD to get the holes for the volume
>and source selector made.

Hmm, that 's almost the price of the front panel here:
http://frontpanelexpress.com/
but still cheaper

>The pot and rotary switch are mounted on a transparent plastic
>panel behind the alu front with some LEDs behind it so that it
>iluminates around the knobs. So, I made the illumination my self

Thanks for the tip! Very simple and good looking.
Great job!
  Reply With Quote
Old 6th September 2006, 01:19 AM   #700
maxw is offline maxw  United Kingdom
diyAudio Member
 
maxw's Avatar
 
Join Date: Jun 2004
Location: London
No worries.

My panels are 10mm thick and frontpanelexpress only go to 4mm. You could probably do it your self with a decent hole saw but a good one is expensive and you still don't get any size you want.

I did all the drilling a thread tapping my self which takes far longer than any other part of building these enclosures
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 06:50 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2