Mezmerize DCB1 Building Thread

[Tea-Bag]

Originally Posted by dimkasta

Guys I am waiting for some mesmerize boards I got from the diyaudio store and I am currently planning on the rest of the parts.
What I was wondering is if there is a way to get two outputs from the board, so that I can drive 4 monoblock amps (dual - dual mono setup driving woofers and mid-twitters separately)
Thanks a lot
Dimitri

I just jumper the outputs together from the RCAs.
Often I use a 100R resistor from the hot signal to jumper.
I believe this can reduce noise, but I am uncertain if this is true or not.

[KatieandDad]

Originally Posted by dimkasta

Guys I am waiting for some mesmerize boards I got from the diyaudio store and I am currently planning on the rest of the parts.
What I was wondering is if there is a way to get two outputs from the board, so that I can drive 4 monoblock amps (dual - dual mono setup driving woofers and mid-twitters separately)
Thanks a lot
Dimitri

The usual trick is to use the Reverse Summing circuitry. i.e. feed each output through its own series resistor (for DC coupling) or a cap and a resistor (for AC coupling)

[Salas]

Originally Posted by atupi

Forgot to ask you if worth to buy some BL grade transistors if i have matched GR transistors with Idss around 5.5

A bit less THD if you will use circa 8mA IDSS BL.

[AndrewT]

Originally Posted by atupi

Forgot to ask you if worth to buy some BL grade transistors if i have matched GR transistors with Idss around 5.5

in some locations of the DCB1 gr are the preferred grade.

[weskoki]

I had bit of accident with my Mez the other day.While listening i managed to spill some Tea on my uncased board Not full cup but still...
I fan dried it immediately and left it off.Thank God it still works.Anyway i compared the sound using the dcb1 and going straight from source to amp and i have to say the dcb1 makes Huge difference.Without it the sound is very 2 dimensional coarse and disjointed.Adding the dcb1 makes my speakers sound twice as big,dynamics are great,textures and micro details as much as you need.:And just to think i haven't hot rod it yet!
Thanks Salas

[atupi]

I want to order some parts from Mouser and i dont know for the main smoothing caps what to choose; low ESR, low impedance or Audio grade as mouser is offering these choises.

[Salas]

Originally Posted by weskoki

I had bit of accident with my Mez the other day.While listening i managed to spill some Tea on my uncased board Not full cup but still...
I fan dried it immediately and left it off.Thank God it still works.Anyway i compared the sound using the dcb1 and going straight from source to amp and i have to say the dcb1 makes Huge difference.Without it the sound is very 2 dimensional coarse and disjointed.Adding the dcb1 makes my speakers sound twice as big,dynamics are great,textures and micro details as much as you need.:And just to think i haven't hot rod it yet!
Thanks Salas

Nice that you liked it. You are welcome.

[Salas]

Originally Posted by atupi

I want to order some parts from Mouser and i dont know for the main smoothing caps what to choose; low ESR, low impedance or Audio grade as mouser is offering these choises.

Use main smoothing capacitors like the ones you like best in power amplifiers.

[KatieandDad]

Originally Posted by weskoki

I had bit of accident with my Mez the other day.While listening i managed to spill some Tea on my uncased board Not full cup but still...
I fan dried it immediately and left it off.Thank God it still works.Anyway i compared the sound using the dcb1 and going straight from source to amp and i have to say the dcb1 makes Huge difference.Without it the sound is very 2 dimensional coarse and disjointed.Adding the dcb1 makes my speakers sound twice as big,dynamics are great,textures and micro details as much as you need.:And just to think i haven't hot rod it yet!
Thanks Salas

What caps did you have in the Mez ?

Poor caps would give poor results.

[weskoki]

Originally Posted by KatieandDad

What caps did you have in the Mez ?

Poor caps would give poor results.

Nichicon Muse and Elna I will try to hot rod it just to see if there's improvement.