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Old 13th June 2011, 11:59 PM   #511
L-Train is offline L-Train  Canada
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Join Date: Jan 2010
Hi Owen,

Glad to hear you had a good trip. I'd like to make another change my list:

1x SE-SE kit
1x BAL-BAL kit
2x SE-SE PCB
2x BAL-SE PCB
2x BAL-BAL PCB

Thanks!

And for those that asked what I'm doing with all of these, I'll be using the BAL-BAL for home, SE-SE for the office, and the PCBs for future projects and backups for when I mess up
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Old 14th June 2011, 12:13 PM   #512
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owen, i'd like to change my order as well. i will take:

1 x BAL - BAL PCB
1 x PSU PCB

thanks,
Iskandar
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Old 15th June 2011, 09:35 AM   #513
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I'd like to make a small change to:

1 bal-bal + PSU
1 bal-se + PSU
1 se-se + PSU
(All kits)
+ 1 bal-bal PCB


thanks!
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Old 16th June 2011, 03:14 AM   #514
amc is offline amc  Canada
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Hi Owen,

Since the options have gotten broader, I would like to modify my request too. It was 2 bal-se kits and 2 psu kits. Now:

1 - bal-bal kit
1 - se-se kit
2 - psu kits

thanks much!
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Old 16th June 2011, 08:44 PM   #515
SvErD is offline SvErD  Norway
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Hi Owen, I'd like to get a SE-SE kit with PSU.

thanks
__________________
I don't suffer from insanity, I enjoy every minute of it!
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Old 19th June 2011, 07:15 AM   #516
Kist is offline Kist  Netherlands
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Location: Amsterdam
Default 20 Ohm

Hi,
I ame interested in your design.
My earfones, Westone, are 20 Ohm. Is that a problem?

Probably you agre that i can replace R2/5 and other side with a 4 layer potentiometer?

Thanks,

J. Kist
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Old 19th June 2011, 09:13 AM   #517
QRikard is offline QRikard  Sweden
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Hi

First a bit about me, i'm an electronics engineer with most focus on embedded system so the audio world is new to me. I'm fairly new to this forum as well, have read around a bit before and done an attempt at a DAC project (school course / private) with a CS4398 which was very educational. This was my first hardware design with digital components, long story short it will never sing in its current state the only chance is to remake everything from scratch.

My current audio setup at work is based on a 30$ headset with the laptops internal sound card. At home i have a stereo thats about 15 years old and the only good thing about it must be durability because i doubt a modern budget system would last 15 years...
The only part that might be salvageable is a DAC707 (purple one with CS8416 & CS4398). Will most likely upgrade that one as well but it might be enough for a first step since its quite a lot of money involved when you start reading here...

Long story short, I found this thread a while ago and I was really surprised to find those measurements in the beginning. Looks to good to be true, then i got a bit scared of the frequency response, but apparently it works great with a good source. Congratulations on a nice design.

Now to the real questions, hope you have some time to answer.
First how much will an entire setup of The Wire cost? Just a ballpark number, in the previous group buy you sold a kit with PCB+opamps for 95$ right. How much more is required before everything is up and running?

How about component availability?
I live in sweden and many components aren't available since farnell only sells to enterprises. The other distributors available doesn't have this type of high end components at all (at least not the ones in the BOM). So i will probably need to by everything from the states. Can i get everything from one supplier to save shipment cost or will i need to go to several?

The big problem, what do i need (not BOM)?
First i need a new pare of headphones, but i plan to find those in a local store so i can find some comfortable ones, my guess is that they will be single ended. To drive the headphones i need an analog source and the only sources i have today are single ended. But i like the concept of a balanced design, and my eyes are focused on the ackoDAC AKD-26. That one is far over my current budget but i really like the design and possibility of extensions.

Will the wire work well for driving a normal input stage of a power amplifier?
At work i will only use headphones but at home i also need something for both my computer and TV. It would be nice with a system that works both ways (hence the interest in the ackoDAC). Will look more into the home stereo in a few months but i like to plan ahead...

Best regards // Rikard
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Old 20th June 2011, 03:09 PM   #518
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Location: Warsaw, Poland
Owen,

What will be the final dimensions of the PCBs for this preamp? I am trying to develop a chassis for my all-in-one preamp with The Wire as headphone amp and would like to be sure that it will fit in the enclosure.

rgds
jacek
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Old 20th June 2011, 03:28 PM   #519
MrSlim is offline MrSlim  Canada
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Quote:
Originally Posted by QRikard View Post
Hi

First a bit about me, i'm an electronics engineer with most focus on embedded system so the audio world is new to me. I'm fairly new to this forum as well, have read around a bit before and done an attempt at a DAC project (school course / private) with a CS4398 which was very educational. This was my first hardware design with digital components, long story short it will never sing in its current state the only chance is to remake everything from scratch.

My current audio setup at work is based on a 30$ headset with the laptops internal sound card. At home i have a stereo thats about 15 years old and the only good thing about it must be durability because i doubt a modern budget system would last 15 years...
The only part that might be salvageable is a DAC707 (purple one with CS8416 & CS4398). Will most likely upgrade that one as well but it might be enough for a first step since its quite a lot of money involved when you start reading here...

Long story short, I found this thread a while ago and I was really surprised to find those measurements in the beginning. Looks to good to be true, then i got a bit scared of the frequency response, but apparently it works great with a good source. Congratulations on a nice design.

Now to the real questions, hope you have some time to answer.
First how much will an entire setup of The Wire cost? Just a ballpark number, in the previous group buy you sold a kit with PCB+opamps for 95$ right. How much more is required before everything is up and running?
If you can purchase most of the components from the same vendor, or get cheap shipping from ebay sellers, it will cost you around $200 to have a completed amp:
$95 for the kit from Owen
$40 for Misc parts on the BOM not included in the kit
$20 for a small case from Hammond(as an example)
$15 for a nice Alps RK27 Pot.
$20 for shipping (as an example)
$200 total (a very rough total of the top of my head)

Quote:
How about component availability?
I live in sweden and many components aren't available since farnell only sells to enterprises. The other distributors available doesn't have this type of high end components at all (at least not the ones in the BOM). So i will probably need to by everything from the states. Can i get everything from one supplier to save shipment cost or will i need to go to several?
I have to disagree with you on your comment about Farnell.
They will sell to anyone, (and so will Elfa). There are lots of DIYers in Europe who use them. You may have to set up an account or a user ID, but you shouldn't have any problems buying from them.

Quote:
The big problem, what do i need (not BOM)?
First i need a new pare of headphones, but i plan to find those in a local store so i can find some comfortable ones, my guess is that they will be single ended. To drive the headphones i need an analog source and the only sources i have today are single ended. But i like the concept of a balanced design, and my eyes are focused on the ackoDAC AKD-26. That one is far over my current budget but i really like the design and possibility of extensions.
If the ackoDAC is too rich for your blood, this one DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 might be of interest. They discuss the ak4396 based variation of this board, and since the chip itself has balanced outputs, you should be able to bypass the Balanced to SE circuitry and feed a balanced amp directly. With some tweaks, this board looks like a real low budget winner.

Quote:
Will the wire work well for driving a normal input stage of a power amplifier?
I'd be concerned about the amount of current you'd be feeding into the input of the power amp from The Wire. I like to think about a headphone amp in the same way as I think of a poweramp for speakers. It is the source of the current gain needed to drive an transducer(either headphones or speakers). It's better to let a preamp or buffer (like a DCB1) do the job of voltage and impedance control between the source component and the amplifier.

Quote:
At work i will only use headphones but at home i also need something for both my computer and TV. It would be nice with a system that works both ways (hence the interest in the ackoDAC). Will look more into the home stereo in a few months but i like to plan ahead...

Best regards // Rikard

Last edited by MrSlim; 20th June 2011 at 03:45 PM.
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Old 20th June 2011, 05:19 PM   #520
qusp is offline qusp  Australia
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why do you need anything after the dac to drive the power amp? any decent balanced dac will be able to do that directly, certainly the es9016 will. the aku26 is actually not so badly priced mr slim, its not close to the price of the full blown ackodac and has just about everything built onto the one board, with only a single supply of clean DC required to drive the whole thing. the regulators, hires usb input, mcu with volume and source select and IV stage are all onboard. It has a digital pot, so no need to blow money on a balanced pot and will drive any amp direct with no problem, so no need for a preamp.

this way you can also do away with the pot on 'the wire' so save coin there. myself i have nothing bad to say about ackos stuff, youve probably read my comments on it around the forum so i wont go on here, but i really think these new integrated more budget solutions hes doing are a great value.

hows it going opc? no noise on the thread for a while, loving your iv mate!! seriously great stuff with the akd12p and the wire v1

Last edited by qusp; 20th June 2011 at 05:26 PM.
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