TC Electronic BMC-2 digital preamp DAC - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

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
Thread Tools Search this Thread
Old 9th March 2013, 08:34 PM   #1
diyAudio Member
Join Date: Oct 2005
Default TC Electronic BMC-2 digital preamp DAC

I just bought a TC Electronic BMC-2, basically to see how good a dac is was and to add a decent digital preamp/attenuator to me arsenal.

My system was: boxee box media streamer > DIY AK4396 dac with passive Tamura output transformers > DIY B1 buffer with stepped attenuator > UCD180HG power amp > Tannoy Little Red Monitors.

Now my setup is: boxee box media streamer > TC Electronic BMC-2 > DIY AK4396 dac with passive Tamura output transformers > UCD180HG power amp > Tannoy Little Red Monitors

I was worried that the DAC noise floor would be a problem (without the B1 between it and the power amp) but this isn't the case - I still need to put my ear against the speakers to hear a hiss.

I'm hearing a significant step up in sound. Better separation, clearer highs, increased warmth and more solid bass. Also better depth and separation at low volumes, where i would expect reduced resolution with a digital preamp. Given all of the concern about digital preamps I am quite surprised.

Why do you think I'm hearing an improvement?

- Dac happier with the power amp load than the preamp? (I can't see how - both are 100kohm)
- B1 was a bottleneck? (I can't see how - even with input and output coupling caps)
- better jitter handling in the BMC-2 than DIY dac? (I can believe that this is the case but wouldn't have expected this to give the degree of improvement I'm hearing)

Puzzled but happy. Just listened to Burial then Cara Dillon and not going anywhere soon :-)
  Reply With Quote
Old 9th March 2013, 11:50 PM   #2
diyAudio Member
Join Date: Oct 2006
The dlink boxee is a full computer, atom processor & all, with no room for a decent clock & tons of supply noise, due to a dc-dc converter, which is itself a switchmode power supply, running from yet another crappy SMPS in the wallwart. So, it's no doubt got horribly high jitter, and the "digital preamp" is giving apparently more stable dataflow to the dac unit, the AK dac chips being very jitter sensitive. So, all makes sense to me.
  Reply With Quote


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
Mod TC-750LC preamp for more gain? volvy Analogue Source 6 11th January 2013 02:35 PM
FS: DEQX 2.6P Preamp (6-channel) DAC, Digital Crossover, and PEQ spurzheim Swap Meet 2 11th December 2012 07:17 PM
Digital source, receiver and DAC for preamp cowana Digital Line Level 10 10th August 2012 04:18 PM
Beresford TC-7510 DAC modding? Sranang_Boi Digital Source 4 24th February 2009 02:47 PM
dac + digital filter + preamp JayV Digital Source 1 3rd July 2003 06:05 AM

New To Site? Need Help?

All times are GMT. The time now is 11:52 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2