The diyAudio build guides - Page 9

Marra · 17th July 2017, 01:42 PM

Quote:

Originally Posted by Variac

They ARE ultra awesome! And I'm sure have allowed many people who ordinarily couldn't have built amps successfully, succeed! A great contribution to our community!

I could not agree more.

paugie · 15th October 2017, 12:23 AM

Good morning
I am an old (63YO) audio enthusiast with very little soldering skills (acquiring some).
My sound system consists of Class D amps (Samwu TPA3118, Weiner, and lately a 3255EVM which I swap on whim outputing to a pair of Tannoy bookshelves.
My sources are a TV, DVD player and a Digital Box which plays FLAC, WAV and MP3s
For volume control, I route the input signal to a cheap 2-tube buffer. I was able to buy an external switch to select sources but it is flakey.

I would like to assemble a pre-amp with minimum work, hopefully forgiving in the soldering area. And if possible the minimum number of components and cost.
Would anyone please advise me whether the Bi or the Mesmerize (or other circuti) would fit my requirements.
I have very little info about these circuits except that they have a selectable input and very good reputation for sound output.
Thank you.

KevinHeem · 02:06 AM

Quote:

Originally Posted by paugie

Would anyone please advise me whether the Bi or the Mesmerize (or other circuti) would fit my requirements.

The B1 would work for you. Boards and Jfets are available at PassDiy. It's not a complicated build, you can easily handle it.

Unless the fact that the B1 board from Pass only has two switchable inputs creates a problem for you.

paugie · 15th October 2017, 06:32 AM

Thank you, KevinHeem
I will look into it.
I suppose the number of inputs can be changed.

paugie · 15th October 2017, 09:02 AM

I'm sorry, I forgot to mention.
I also use a turntable through a discrete phono preamp before the tube buffer.
Will that be a complication?

AndrewT · 15th October 2017, 09:45 AM

The B1 feeds the power amplifier.
For phono you use:
phono > RIAA pre-amp > B1 > power amp
or
phono > RIAA pre-amp > tube buffer > B1 > power amp
You would need the tube buffer only if your RIAA pre-amp cannot adequately drive the cables to the next stage.

The B1 accepts two inputs, whereas the DCB1 based Mezmerise has upto six inputs.

15th October 2017, 09:45 AM	#86
AndrewT R.I.P. Join Date: Jul 2004 Location: Scottish Borders	The B1 feeds the power amplifier. For phono you use: phono > RIAA pre-amp > B1 > power amp or phono > RIAA pre-amp > tube buffer > B1 > power amp You would need the tube buffer only if your RIAA pre-amp cannot adequately drive the cables to the next stage. The B1 accepts two inputs, whereas the DCB1 based Mezmerise has upto six inputs. __________________ regards Andrew T.

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15th October 2017, 12:23 AM	#82
paugie diyAudio Member Join Date: Jan 2015 Location: Meycauayan, Philippines	Good morning I am an old (63YO) audio enthusiast with very little soldering skills (acquiring some). My sound system consists of Class D amps (Samwu TPA3118, Weiner, and lately a 3255EVM which I swap on whim outputing to a pair of Tannoy bookshelves. My sources are a TV, DVD player and a Digital Box which plays FLAC, WAV and MP3s For volume control, I route the input signal to a cheap 2-tube buffer. I was able to buy an external switch to select sources but it is flakey. I would like to assemble a pre-amp with minimum work, hopefully forgiving in the soldering area. And if possible the minimum number of components and cost. Would anyone please advise me whether the Bi or the Mesmerize (or other circuti) would fit my requirements. I have very little info about these circuits except that they have a selectable input and very good reputation for sound output. Thank you.

15th October 2017, 06:32 AM	#84
paugie diyAudio Member Join Date: Jan 2015 Location: Meycauayan, Philippines	Thank you, KevinHeem I will look into it. I suppose the number of inputs can be changed.

15th October 2017, 09:02 AM	#85
paugie diyAudio Member Join Date: Jan 2015 Location: Meycauayan, Philippines	I'm sorry, I forgot to mention. I also use a turntable through a discrete phono preamp before the tube buffer. Will that be a complication?