Buffalo II - Page 177 - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > Twisted Pear

Twisted Pear Superior quality electronic kits

Reply
 
Thread Tools Search this Thread
Old 4th March 2012, 11:30 AM   #1761
diyAudio Member
 
Join Date: Sep 2009
Location: Spain
Default signal output parallel

Hi
I would like to place another signal output welded parallel to the output rca SE. With this new signal output I feed a pair of subwoofers.
Is it possible?
__________________
SF Cremona clone DIY speakers
  Reply With Quote
Old 4th March 2012, 12:26 PM   #1762
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally Posted by albertob View Post
Hi
I would like to place another signal output welded parallel to the output rca SE. With this new signal output I feed a pair of subwoofers.
Is it possible?
Yes.
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 4th March 2012, 12:29 PM   #1763
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally Posted by nacder View Post
Hi Russ/Brian,

I am using monoblock amps placed next to the speakers driven by Buffalo dac (with IV stage) via long interconnects. Different interconnects seem to impart different sonic signatures.

I wonder if I can place a current mirror after the dac to buffer the current output, and place the IV stage (Legato/Ivy) at the amplifier side to improve the interconnection (i.e. using current output instead of voltage output connection). What might be the pros/cons of doing this?
No, I can't say I think this is a good idea. Much better just to put the DAC in the monoblocs if you really want direct.
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 4th March 2012, 10:15 PM   #1764
diyAudio Member
 
Join Date: Dec 2007
Quote:
Originally Posted by Aleksi M View Post
Here is my finished build. No arduino. Atmega16 based controller and the board is my own design. Remote control, Em14 encoder for volume/balance and PWM supplying the LCD backlight for brightness adjustment.

Inside pics can be found from the link. Volume control is not yet implemented in the inside pics as they are so old. Volume knob is attached to the encoder with a 7mm bar going through two ball bearings to get that "high-end feel". Also the encoder was not enough to support the weight of the knob by itself.

Click the image to open in full size.
http://amattsso.1g.fi/kuvat/Audio/DSC_8643_.jpg
Here's a picture that shows what's inside the case. Volume control can also be seen in this one.

Click the image to open in full size.
http://amattsso.1g.fi/kuvat/Audio/DSC_8683.jpg/full
  Reply With Quote
Old 5th March 2012, 12:04 AM   #1765
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Absolutely awesome. Great job!
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 24th March 2012, 02:03 PM   #1766
gioz is offline gioz  Italy
diyAudio Member
 
gioz's Avatar
 
Join Date: Jul 2008
Hi, one quetion about buffalo 2 dac....
It's possible to use one bicolor led instead two led for MUTE and LOCK ?
If is possible, what kind of led should I use? Common cathode or common anode??

thanks
  Reply With Quote
Old 29th March 2012, 10:11 AM   #1767
diyAudio Member
 
Join Date: Sep 2009
Location: Spain
Hi
I've finished my project of Buffalo DAC. I hang some pictures like always.

Buffalo II is a well implemented in the power supply. When I first tried the Dac surprised me little or no difference it was my last dac (ULTRACURVE). The pleasant surprise came when I install the tridents. A wider scene and a lot of detail. I decided to work on this and I have put regulators "SALAS" low noise throughout the food. I also replaced the trident of the clock by another regulator. All carry a bypass capacitor of Teflon in the most appropriate regulator. With this change the sound gains a lot.

To give a touch of warmth I installed an outlet valve that coexists with the output v3.1 LEGATO. The valves also have a shunt regulator "Rooms" High Voltage. Accept valves 12AX7 and 6N2P type is selected with a switch on the PCB. I tried with some Russian NOS 6n2p and now I am shooting (10 hours) a 12AX7 Psvane Grade To see that such

The two outputs can be selected with a switch. The signal path is as short as possible: 4 cm to 10 cm for legato and the tube. I used Panasonic TQ2-5V relay low signal.

I have yet to be released I2S input on the site of the twisted pear. For now I feed him with a cable spdif optical signal of a MacMini.

In the future I want to do a mono-tube stages and so I left the LEGATO, to select the best solution to go with tube amplification. Nor do I want to move from warmth.

The DAC is controlled by Arduino and access all possible row from Dac: setup and volume. It has two memoirs but easily the code can more, so as to change the welcome message, etc..
The box is completely machined hifi2000 the front (anterior and posterior).

Sorry for my English

Br
AL

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
__________________
SF Cremona clone DIY speakers
  Reply With Quote
Old 29th March 2012, 04:19 PM   #1768
Takaji is offline Takaji  Canada
diyAudio Member
 
Join Date: Jul 2011
Absolutely beautiful!! I'm definitely going to take some design hints from you
  Reply With Quote
Old 30th March 2012, 09:45 AM   #1769
CeeVee is offline CeeVee  Portugal
diyAudio Member
 
CeeVee's Avatar
 
Join Date: Dec 2006
Really nice Alberto.

Enjoy
  Reply With Quote
Old 26th May 2012, 03:37 PM   #1770
Can you say Audio?
diyAudio Member
 
Join Date: Aug 2011
Location: Aurora, Colorado
Interesting. I landed on your post searching to see if anyone else was experiencing the loud hiss with 252k tracks. Here's what I'm seeing - I've assembling everything I need for a 3 way double blind comparison between the new Trident V3's, Belleson Super Regulators (1.2, 3.3) and Paul Hynes Regulators (1.2, 3.3).

I've been listening to the Belleson regs listening to 352 tracks via the exaU2I (firmware removed for now). I rolled in the Trident V3, and heard the loud hiss at upper sample rates. After double checking solder joints, etc, I went back to the Belleson's. Quiet as a church mouse.

The Tridents are quiet and play well up to 192K. My I2S leads are very short, and I'm running a 100Mhz Buffalo II.

Whatever's going on, running the Belleson regs completely addresses the issue. Thoughts? I've been trying to get a response as to what I'm giving up without the firmware in (beyond relaxed timing). Maybe that could be a factor.

Quote:
Originally Posted by glt View Post
Was able to play 352.8K tracks without any noise. Critical parameters seem good I2S wiring arrangement, FIR filter set to slow, Quantizer at 8bit true differential.

The only issue is during silence (pause, gap or stop) where instead of silence, I get a loud hiss with very peculiar characteristics:

The level and tone of this hissing sound changes with the volume setting with some settings giving more volume than other settings but not related to the amount of volume attenuation. In addition, FIR sharp filter results in a louder noise than the slow filter. The quantizer bit depth also changes the amount of noise coming from the DAC. The IIR filter and the notch delay don't seem to have any effect.

Any hints as to what is going? I know the upgrade to 100Mhz clock was to resolve some of these issues, but when playing music the 80MHz clock doesn't seem to cause any problems.

Are there any secret register I can use? :-)
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Buffalo Tweaking jkeny Digital Line Level 316 10th March 2010 09:14 PM
Hello from Buffalo NY chris emo Introductions 1 13th July 2007 04:24 AM
Buffalo brains macmeech Introductions 1 15th June 2004 06:03 PM


New To Site? Need Help?

All times are GMT. The time now is 09:31 PM.


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