Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

NE5532 circuit. I need more bass. Help!!
NE5532 circuit. I need more bass. Help!!
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 15th August 2018, 11:45 AM   #11
dj_holmes is offline dj_holmes  United Kingdom
diyAudio Member
 
Join Date: Nov 2004
Location: london
That oscillator looks amazing! And hard to solder!

I'm more confident in soldering capacitors to be honest.

Surely I can't be the only person in this position. I did try Google thin bass Dacmagic and there was 100 tuneups but nothing direct!
  Reply With Quote
Old 15th August 2018, 12:56 PM   #12
Max Headroom is online now Max Headroom  Australia
diyAudio Member
 
Max Headroom's Avatar
 
Join Date: Jan 2013
Location: West Australia, near to the beach, natural ambient sounds mostly.
Quote:
Originally Posted by dj_holmes View Post
That oscillator looks amazing! And hard to solder!
You could solder fine wires to the existing pcb holes/pads and then place/solder the osc module to those with tiny solder fillets...I'm not sure of your skill level and tools.


Quote:
I'm more confident in soldering capacitors to be honest.
On closer inspection they look to have done some 'voicing' in the power supplies.....R400 & R401 are 56R 2W carbon resistors, R107 2R2 2W.

You could try swapping different resistor types here, ie 5W Wire Wound or Metal Film (4 x 220R 0.6W in parallel) for R400, R401 and 4 x 8R2 MF in parallel for R107.

These resistors are before PS regulation, decoupling, reticulation etc but they can have a subjective influence IME....easy to change and cheap....possibly worth trying provided your soldering skills are good.



Dan.
  Reply With Quote
Old 16th August 2018, 12:56 AM   #13
dj_holmes is offline dj_holmes  United Kingdom
diyAudio Member
 
Join Date: Nov 2004
Location: london
I'm happy to try that too. Resistors are not too expensive either! But it it necessarily give better bass?
  Reply With Quote
Old 16th August 2018, 01:48 AM   #14
rayma is offline rayma  United States
diyAudio Member
 
Join Date: Apr 2011
Quote:
Originally Posted by dj_holmes View Post
Resistors are not too expensive either! But it it necessarily give better bass?
I think you have a different problem, but it's hard to say what. There is no LF rolloff
in that circuit, save the output coupling capacitors (not shown) that you have removed.

If there is normally an output DC voltage offset before the output capacitors, then removing
them could cause a problem.

Last edited by rayma; 16th August 2018 at 02:14 AM.
  Reply With Quote
Old 16th August 2018, 02:38 AM   #15
Max Headroom is online now Max Headroom  Australia
diyAudio Member
 
Max Headroom's Avatar
 
Join Date: Jan 2013
Location: West Australia, near to the beach, natural ambient sounds mostly.
Quote:
Originally Posted by dj_holmes View Post
I'm happy to try that too. Resistors are not too expensive either! But it it necessarily give better bass?
IME carbon resistors can add/cause a warm but slightly 'dirty' sound with diminished bass......ie reduced sense of 'power'.
I know that these resistors are way up the front of the power supply, but IME the LF/VLF noise of carbon resistors can cause an 'instability' that kills bottom end bass power and definition.
Quick, easy and cheap mod, you can try ceramic 5W/2W WW resistors or MF and see if you get a different sound and maybe more to your liking.


Dan.

Last edited by Max Headroom; 16th August 2018 at 02:41 AM.
  Reply With Quote
Old 16th August 2018, 02:49 AM   #16
cowanaudio is offline cowanaudio  Australia
diyAudio Member
 
cowanaudio's Avatar
 
Join Date: Jul 2004
Location: Canberra
Quote:
Originally Posted by Max Headroom View Post
IME carbon resistors can add/cause a warm but slightly 'dirty' sound with diminished bass......ie reduced sense of 'power'.
Dan.
And why would that be?
__________________
Don't Procrastinate....Just Do It!
  Reply With Quote
Old 16th August 2018, 02:50 AM   #17
cowanaudio is offline cowanaudio  Australia
diyAudio Member
 
cowanaudio's Avatar
 
Join Date: Jul 2004
Location: Canberra
Quote:
Originally Posted by Max Headroom View Post
Low phase noise oscillator will improve lows.
Oh. How?

Quote:
Originally Posted by Max Headroom View Post
To increase bass output level?
__________________
Don't Procrastinate....Just Do It!

Last edited by cowanaudio; 16th August 2018 at 02:54 AM.
  Reply With Quote
Old 16th August 2018, 05:09 AM   #18
Max Headroom is online now Max Headroom  Australia
diyAudio Member
 
Max Headroom's Avatar
 
Join Date: Jan 2013
Location: West Australia, near to the beach, natural ambient sounds mostly.
It's about 1/f noise....good clocks minimise LF/close in (1/f) noise.
Stable clock sets 'solid foundation' in the reproduced sound.
Carbon resistors add 1/f noise.
1/f noise (clock induced noise included) causes IM and AM which serves to subjectively 'scatter' bass power and clarity.
TF are 1/f very noisy, decades more so than MF...why they would specify noisy resistors for the digital stages I am not certain.
The 1% MELF resistors in the analogue stages are suspect also....they can be carbon or MF and the schematic does not specify.


Dan.
  Reply With Quote
Old 16th August 2018, 10:15 AM   #19
dj_holmes is offline dj_holmes  United Kingdom
diyAudio Member
 
Join Date: Nov 2004
Location: london
I do have the whole service manual so I can have a look but I'm sure the smaller resistors are metal.
  Reply With Quote
Old 16th August 2018, 12:29 PM   #20
xrk971 is online now xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
NE5532 circuit. I need more bass. Help!!
Try adding 10uF 16v 0805 X7R bypass caps between Vcc/GND and Vee/GND right at the pins or piggyback on top of existing bypass cap (47nF).
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote

Reply


NE5532 circuit. I need more bass. Help!!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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pre-Amp - LM1036 + NE5532 Clipping and Distorted Bass RayAkmal Solid State 17 21st August 2017 11:19 PM
NE5532 circuit.What to change to increase amplification DRONE7 Analog Line Level 32 27th June 2017 01:00 AM
Bass Controller Circuit! Paswa Chip Amps 3 26th October 2007 12:58 PM
NE5532/4 bass sound in a quad package georgehifi Analog Line Level 12 24th September 2006 10:27 PM


New To Site? Need Help?

All times are GMT. The time now is 01:08 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki