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Inexpensive sound card/DAC for BX5A

post #1 of 10
Thread Starter 

It all started when I decided to upgrade my old crappy computer speakers to something better. Originally, I had a quite modest goal: getting something which is good enough so that I would be able to enjoy listening to music from my computer, with a ~100$ budget. After I did some readings about different speakers, I learned that I could get something better than the usual Logitech/Creative/Altec stuff by moving to entry-level studio monitors instead of 2.1 speakers.

 

I was about to buy m-audio AV40's, when I read somewhere here that the BX5As are much better, and decided to search ebay just to see how much I need to stretch my budget just to get these (even used ones). It turns out someone on ebay was selling BX5As from liquidation for 109$ or best offer. I offered 100$, and got them. At this price I was expecting them to be the old model, and to be in pretty poor cosmetic shape, and I was surprised to find that these are actually the deluxe ones, and they came in their original box and look just like new. Furthermore, maybe I was just imagining it, but it seems to me like after playing them for a couple of hours, their sound kind of "opened up", which means they may be entirely new. This may have been the best deal I ever got out of ebay.

 

So now I got really good speakers for my computer, they sound unbelievably good, and I truly enjoy listening to them. But then I started thinking - maybe I'm still missing something and not realizing their full potential by using my desktop's onboard sound card, and not something better. The sound I get from my desktop isn't all that bad: it's pretty clean, with no hiss or any other audible noises, but I might be missing some clarity and detail.

 

So now, my question is: could I get some noticeable improvement by using a budget USB DAC or discrete sound card, instead of my onboard sound, and which one should I get? Some points to consider:

  1. It was never my original intention to get a true audiophile-level sound out of my computer. Now that I got the taste of better sound, I am hungry for more, but I still do not expect a true hi-fi sound with my budget.
  2. I am looking for something quite cheap: around 60$
  3. The music I listen to is mostly in MP3 format - most are compressed to 192kbps, some better, some worse. So some detail is lost already, and my speakers, while great for their price range, are not 2000$ speakers, so this is also a limiting factor.
  4. Having a volume control knob on the DAC is nice, but definitely not a must. I assigned hot keys to control the volume through my computer's keyboard, and it works well enough for me.
  5. I am dual booting my computer between Windows and Linux, so I prefer something that does not require proprietary drivers.
  6. I don't mind buying used equipment, but so far I couldn't find a lot of used stuff at this price range. I don't have any experience with DIY and don't have the necessary equipment.

 

I checked ebay and did some reading here, and found few options:

There are several different PCM270x based DACs, such as "DAC Destroyer" and some generic Chinese equipment (the cheapest version of the "Muse" DAC). Is this likely to get me a real improvement over my onboard sound?

 

Some other Chinese DACs are using different chipsets, and I wonder which one is going to be better. For instance, there is this one, based on TDA1305T. I read a little about it, and it seems like this chip, though kind of outdated now, was used in high-end units in the past, but I'm a bit suspicious of this one, because its price seems too cheap:

http://cgi.ebay.com/Mini-TDA1305T-USB-DAC-Sound-Card-Support-DTS-5-1-C54-/120656530828?pt=LH_DefaultDomain_0&hash=item1c17b08d8c

 

Any other ideas?

post #2 of 10
Thread Starter 

Bump bump

 

Ideas? Someone? Anyone?

 

post #3 of 10

This: http://www.headphonia.com/USB-DAC-Cable/USB-DAC-Cable-with-35mm-Mini-Plug-75cm-30::10134.html is about $69, so pretty close to the price you are shooting for.  Check out the opinions on this thread: http://www.head-fi.org/forum/thread/496468/headphonia-usb-dac-cable

 

I bought one from someone else a while back but haven't had a chance to listen to it yet, but given the type of DAC chip and output opamp, it would be hard to beat for the price.. 

 

Re #5, I use Linux at work, and I have a PCM2707 based DAC that works fine with it, so since the the cable DAC uses a 2707 for its usb receiver, it should be fine. I may actually use it at work and sell the existing one, since I'll have 2 Gamma2's at home soon.. Things seem to work better with the latest version of ALSA too...


Edited by MrSlim - 12/29/10 at 9:07pm
post #4 of 10
Thread Starter 

Thanks!

 

I wasn't aware of this one. Looks really nice from the spec and the reviews, and the price is very reasonable too.

 

The only issue I have with this cable is that it ends up with a male 3.5mm connection. I currently have a male 3.5mm stereo to two 1/4inch mono cable for my speakers. I can get a female-female stereo coupler to connect the two cables, but I don't know if it is good to have so many connections on the way to my speakers. Wouldn't it urt the sound quality?

 

post #5 of 10

Is that dac cable made for headphones though, if so it won't provide the right amount of 2vrms which is needed for speakers, for around

60$ you should be able to get a used m-audio audiophile usb, it also has a volume control knob for the rca outs alot more pratical than using windows volume control, it does require proprietary  drivers though but they are avaible for windows and mac.

post #6 of 10
Thread Starter 
Quote:
Originally Posted by JRG1990 View Post

Is that dac cable made for headphones though, if so it won't provide the right amount of 2vrms which is needed for speakers, for around

60$ you should be able to get a used m-audio audiophile usb, it also has a volume control knob for the rca outs alot more pratical than using windows volume control, it does require proprietary  drivers though but they are avaible for windows and mac.



Hmmm ... good point. Didn't think about that.

 

Should there be a difference in the output power between active speakers (with built-in amp) and headphones? I couldn't find what is the output power level for the Headphonia USB cable, and even if I had this info, I wouldn't know what I should be looking for.

 

I wish I could find any used uDAC-2. Maybe this would have solved my dilemma. I didn't see any for-sale.

post #7 of 10

2vrms is for active speakers, i think headphones is around 1vrms , yes the udac-2 is a good option it's avaible here http://www.amazon.com/NuForce-Icon-uDAC-2-Black-Headphone/dp/B003Y5FRNS/ref=sr_1_1?ie=UTF8&qid=1293728492&sr=8-1 , or use google product search.

post #8 of 10
Thread Starter 
Quote:
Originally Posted by JRG1990 View Post

2vrms is for active speakers, i think headphones is around 1vrms , yes the udac-2 is a good option it's avaible here http://www.amazon.com/NuForce-Icon-uDAC-2-Black-Headphone/dp/B003Y5FRNS/ref=sr_1_1?ie=UTF8&qid=1293728492&sr=8-1 , or use google product search.


The only problem is that a new udac-2 is 130$, which is too much for my budget. I've been looking for a used udac-2, but couldn't find anything.

 

post #9 of 10
Thread Starter 

A follow-up question:

 

I saw someone selling a combo of used USB-DAC cable (the one from Headphonia with the Wolfson chip) and Lyrix Pro headphone amp. The price looks really reasonable (80$ shipped for both together).

 

The question is: can I use this setup to connect my speakers? The Lyrix Pro amp have a potentiometer so I can use it to control the volume. It also have a gain adjustment switch, so I can keep it on low (3x gain, where high is 10x). Could this be a reasonable setting for the BX5a speakers? Is a 3x gain setting safe for active speakers? Would this two-stage amping setting (the headphone amp and then the internal amp of the speakers) likely to have a negative effect on the sound quality, or is it just like using a pre-amp?

 

The alternative is to connect the speakers directly to the USB-DAC cable with a coupler.


Edited by sela - 1/1/11 at 3:31pm
post #10 of 10

It is do-able, but not recommended the USB-DAC cable and Lyrix Pro headphone amp  are both meant for headphones not speakers and double amping will negativly effect the sound quality, i think there was a version of the usb-dac cable with rca out, can't you find a used m-audio audiophile usb or used creative soundblaster x-fi hd

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