Mic, Line, EQ... Preamps - Page 29 - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 31st July 2011, 12:27 PM   #281
diyAudio Member
 
Join Date: Oct 2009
Hi apexaudio
Plz post schematic of
Balanced line input with low cut 12dB/oct at 35Hz
  Reply With Quote
Old 18th August 2011, 07:01 AM   #282
Ivchikx is offline Ivchikx  Latvia
diyAudio Member
 
Join Date: Feb 2011
Location: Baldone, Latvia
Send a message via Skype™ to Ivchikx
On ML3 these tone control pots (bass, middle, treble), can I use pots with center point? With all tone pots turned to center position, sound should be unchanged, e.g. same as from source?
  Reply With Quote
Old 9th September 2011, 03:24 PM   #283
Ivchikx is offline Ivchikx  Latvia
diyAudio Member
 
Join Date: Feb 2011
Location: Baldone, Latvia
Send a message via Skype™ to Ivchikx
UPDATE: Just finished one pair of ML3 for TDA7294 amp and works like a charm. Big thanks, Apex.
  Reply With Quote
Old 23rd September 2011, 06:34 AM   #284
diyAudio Member
 
formula 22's Avatar
 
Join Date: Sep 2011
Location: El Triunfo
Question Schematic for preamplifier for sabwufer

Hi
I need a diagram and PCB for an active filter for the subwoofer amplifier: "Quasi amplifier for beginners" (of APEX Audio).
Regulated frequency of 40...120 Hz with a slope of 12...18dB.
This preamplifier that can directly to be connected to output to my stereo amplifier.

Thanks for your help

Last edited by formula 22; 23rd September 2011 at 06:50 AM. Reason: Schematic fo preamplifier for subwoofer
  Reply With Quote
Old 1st November 2011, 10:22 AM   #285
irwanks is offline irwanks  Indonesia
diyAudio Member
 
Join Date: Oct 2011
Location: Bandarlampung
Hi apex. I have made apex ml3 pcb. This is the result. Quality is good enough. But i had a little hum, but when i touched the casing of my amp, hum was disappear. Can you give me any advice for it. How to wiring apex ml3 correctly? I just used simple regulated power supply. Thank you very much.
Attached Images
File Type: jpg Image0011.jpg (128.9 KB, 219 views)
File Type: jpg Image0012.jpg (156.4 KB, 1587 views)
File Type: gif dual-power-supply-15-volt.gif (6.0 KB, 1515 views)

Last edited by irwanks; 1st November 2011 at 10:39 AM.
  Reply With Quote
Old 1st November 2011, 11:55 AM   #286
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by irwanks View Post
Hi apex. I have made apex ml3 pcb. This is the result. Quality is good enough. But i had a little hum, but when i touched the casing of my amp, hum was disappear. Can you give me any advice for it. How to wiring apex ml3 correctly? I just used simple regulated power supply. Thank you very much.
You must grounded your case (gnd from regulated psu connect to amp case)
  Reply With Quote
Old 2nd November 2011, 01:46 AM   #287
irwanks is offline irwanks  Indonesia
diyAudio Member
 
Join Date: Oct 2011
Location: Bandarlampung
Quote:
Originally Posted by apexaudio View Post
You must grounded your case (gnd from regulated psu connect to amp case)
Thank you very much for your quick reply
  Reply With Quote
Old 12th December 2011, 08:29 AM   #288
Endik is offline Endik  Indonesia
diyAudio Member
 
Join Date: Oct 2010
Location: Balikpapan
Quote:
Originally Posted by apexaudio View Post
In this thread I will post preamps, EQ, active x-overs, VU...
ML3 is Mic/Line XLR preamp with three band EQ +/-20dB
PCB size 100x40mm
Regards
Mr Mile,

Can you share pcb lay out in pdf format?

How to make this preamp to 4 adjustable potensio (high, mid, freq and low)?

regards
Endik
  Reply With Quote
Old 31st December 2011, 07:31 AM   #289
diyAudio Member
 
Join Date: Oct 2005
apex,
please help how to put balance pot ,
i will use ML3 as multiple input maybe 4 or up ML3 and feed it to MX1,
i just hope your help of adding a balance pot to assign left/right to MX1 as master and ML3 as multiple input,
hope you help
Attached Images
File Type: jpg mx1.jpg (166.8 KB, 1311 views)
  Reply With Quote
Old 31st December 2011, 09:12 AM   #290
Endik is offline Endik  Indonesia
diyAudio Member
 
Join Date: Oct 2010
Location: Balikpapan
Thank you Mr. Mile,
This is my ml3 sound ok but i will add 1 potensio for mid low freq,
can some one help me?
Thank you
ImageShack® - Online Photo and Video Hosting

Click the image to open in full size.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
help with single supply for two EQ/preamps lassoharp Power Supplies 3 9th July 2009 03:24 PM
HELP with PHONO and MIC preamps. P Lazkao Tubes / Valves 10 23rd June 2006 01:42 PM
measurement programs, mics and mic preamps. j.burtt Multi-Way 11 15th November 2005 08:08 PM
Power supplies in mic tube preamps JamMan Tubes / Valves 5 2nd November 2004 02:48 PM
mic preamps travis Solid State 7 20th May 2002 05:59 PM


New To Site? Need Help?

All times are GMT. The time now is 02:29 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2