"Bamboo Project" : Dual Mono 3E Audio 480-1-29A Amplifier

[brunes]

Jst 3 iore connector

 

[daniboun]

That is why I would appreciate a close photo to see exactly what is shown at the white plastic component on the board, assuming that is the contact point for the 3 pins of the XLR socket ? Thanks.

Here goes :

 

[Overseas]

My stuff is on the way from Audiophonics

As I am an impulsive audio enthusiast ( hahaha), also completely non technical (otherwise I would not be an enthusiast...), can someone clarify for me what am I going to get from my project (in terms of power specs) that is mainly:

3E AUDIO 480-1-29A PFFB Mono amplifier Module​

plus

MP-H250S48 SMPS Switching Mode Power Supply Module 250W 48V 5A PFC​

MP-H250S48 SMPS Switching Mode Power Supply Module 250W 48V 5A PFC - Audiophonics

This SMPS MP-H250S48 switch-mode power supply module is capable of delivering 48V voltage and 5A current for 250W of power. It also features PFC (Power Factor Correction).

www.audiophonics.fr

That's because I had a look at Amir review but I am still confused, there were mixed things there plus I am not good at graphs.

So what Power/Mono Channel (8/6/4/2 ohms) at what distorsion, considering the specific power source listed above ?
My speakers are rated for as low as 3.3 ohm at minimum (Triagle Australe Esprit EZ).

Thank you for your patience.

 

[brunes]

 

[Overseas]

View attachment 364081

I assume this are the specs for our module, 190/220/315 W => as my power source is limited to 250w max does this mean actually 190/220/250 w ?
Also, what distortion apply for above table - 1% ?

 

[Overseas]

Just want to show the module comes with a small kit, including the connection for the output socket.

 

[Kevinfc]

Get a combo XLR / TRS plug and that s it )
I will share you the wiring diagram )

Neutrik NCJ5 FI-S

Embase combo Combo jack 6,3 mm mono / XLR 3 points, Norme D, À souder, Vis adaptées disponibles en option, article n° : 300310

www.thomann.de

My concern is drilling the hole to accept such a fitting.

I’d certainly prefer this to a simple TRS jack, but it appears that three holes per jack must be drilled in a very tight area. Is this the case? If so, how did you accomplish it, any tips?
thanks

 

[daniboun]

My concern is drilling the hole to accept such a fitting.

I’d certainly prefer this to a simple TRS jack, but it appears that three holes per jack must be drilled in a very tight area. Is this the case? If so, how did you accomplish it, any tips?
thanks

Drilling is not difficult with the right tools )
I am driiling all my cases with this.(22mm)
Use a drill at moderate speed !

If you want to project the positioning of your XLR plug use a 20 euro cent coin (they are 22mm like the XLR plugs)

Amazon.fr

 

[Overseas]

I am going forward with my project: 2 monos with separate power sources, no cases.

Just discussed it with the 'project master' (aka my cousin that will do the soldering), so we are good.
Deadline not clear anyway.

Questions:
1. using exactly same modules, power included - as here - no air cooling required, right ?
2. as I checked, no soldering to the module itself is required, all pieces (speakers out etc) will fit with special connector of various types ( I do not know tehcnical English)
3. module is configured for mono use (PBTL ?), so in such scenario no modification of the board is required
4. what cable should I use for connecting the speakers sockets, I am going with same cable I use for speakers that is:

Profile 79 Strand

This iconic speaker cable quickly became an industry standard

www.qed.co.uk

(I even intend to use it Y split, so no distinct red/ black wires.... no impact on soound, hahahaaa).

Thanks

 

[daniboun]

I am going forward with my project: 2 monos with separate power sources, no cases.

Just discussed it with the 'project master' (aka my cousin that will do the soldering), so we are good.
Deadline not clear anyway.

Questions:
1. using exactly same modules, power included - as here - no air cooling required, right ?
2. as I checked, no soldering to the module itself is required, all pieces (speakers out etc) will fit with special connector of various types ( I do not know tehcnical English)
3. module is configured for mono use (PBTL ?), so in such scenario no modification of the board is required
4. what cable should I use for connecting the speakers sockets, I am going with same cable I use for speakers that is:

Profile 79 Strand

This iconic speaker cable quickly became an industry standard

www.qed.co.uk

(I even intend to use it Y split, so no distinct red/ black wires.... no impact on soound, hahahaaa).

Thanks

1) you dont need air cooling. You probably wont use it @1 % THD
2) The module is using 6.3mm faston sockets for all input/output
3) Mono version is set in PBTL mode
4) Any 1.5 or 2mm2 good quality cables for speakers. Keep it as short as possible and twist it )

 

[daniboun]

For the followers the 3E Audio RevB is reviewed here via APX555

"Bamboo V2" project. 3E Audio 260-2-29A Stéréo Rev. B (OPA1656) + PFC/LLC PSU. APx555 Measurements )

Hi amigos, Before starting, I suspended the measurements of the first project "Micro Bamboo." I will come back to the quick measurements at the end of May finally, I still have to speak with Sami about his Micro Audio PSU... am focusing on this thread only on the measures of the "Bamboo V2"...

audiosciencereview.com

 

[Overseas]

Drilling is not difficult with the right tools )
I am driiling all my cases with this.(22mm)
Use a drill at moderate speed !

If you want to project the positioning of your XLR plug use a 20 euro cent coin (they are 22mm like the XLR plugs)

Amazon.fr

No 22 mm, but 24 mm.
Only worked for 24 mm, as I also measured right on the socket.

 

[activewire]

Daniboun you impress me as being a very thoughtful person who makes precise and intentional design decisions. Can you share your reasoning to choose XLR with push release for the bamboo Stereo amp, but no push release on XLR for this dual mono build?

 

[daniboun]

Daniboun you impress me as being a very thoughtful person who makes precise and intentional design decisions. Can you share your reasoning to choose XLR with push release for the bamboo Stereo amp, but no push release on XLR for this dual mono build?

In all sincerity, I choose the connectors based on the stocks available from my supplier) There is no difference in performance so the choice will be up to the end consumer

 

[bugal]

Hello, after enyoing a tiny stereo 3eaudio version - that's my "roomy" 2x mono + MicroAudio PSU - I like the sound a lot.
PS. Dani, I will twist the rest of cables, I promise

 

[MicroAudio]

A quick measurement of the SMPS600-R2 with the 3e Audio amplifier.

If you would like to see any other measurements just ask!

Thanks

 

[rsqt]

I couldn´t find the data for ripple mV p-p for the Micro Audio PSUs.
Mornsun had 250mV p-p, MP-H250S48 from Audiophonics had 300mV p-p.

​

 

[jlx]

I couldn´t find the data for ripple mV p-p for the Micro Audio PSUs.
Mornsun had 250mV p-p, MP-H250S48 from Audiophonics had 300mV p-p.

​

the Mornsun 350w is indeed Max noise + ripple of 250mV. The Mornsun 450, 550, 750 have a Max n + r of 200mV, Oddly the Mornsun 1000 lists a n + r of 200mV Typical (as opposed to Max)
the 350 looks like a slightly compromised design based on several specs in their white papers, but nothing to be concerned about as it is still a very well specced out unit

 

[Gada]

Good evening everyone.
I would like to expand the project by inserting two vu-meters:

TEK Vu-meter 82.5mm Bulb backlight -20dB - Audiophonics

tek victors backlight orange db 82.5 mm

www.audiophonics.fr

or something similar from AliExpress.


I would like to know which driver board to use and how to connect it to the amplifier?
Thank you

 

[bolzanis]

Tomorrow I will finnaly get my custom case for Micro audio 600R2 power supply and two 3e 480-1-29A amplifers, so have question for those who already built this configuration (@daniboun) Did you connect Micro audio GND point to chassis earth point or not?