bass boost

lawbadman · 28th August 2003, 11:03 PM

Hey guys

Does anyone know of a good bass boost circuit? I want a circuit to boost frequencies of 80hz down (subwoofer region), for my headphone amp, the bass from my cd player is too low and the bass boost on the cd player sounds nasty. I have tried many circuits, but most of them kill the treble.

Anyone know any good circuits?

paulb · 28th August 2003, 11:13 PM

Perhaps project 84 at www.sound.au.com? Some form of graphic equalizer will give you the most flexibility.
Are you sure your headphones can handle the bass at the level you want? Maybe the bass boost is driving your headphones into clipping.
Also make sure you check out the projects at www.headwize.com (Library/Projects). Scroll down to "Signal Processors". Actually, start there first.

mwmkravchenko · 28th August 2003, 11:18 PM

Marchand electronics has the BASSIS circuit. It is extremely flexible. Audio magazine in the late 80's had a complete article in it including PCB Patterns. I can't remember when but I will check.
Your fortunate I found it april 1990.

Mark

lawbadman · 28th August 2003, 11:34 PM

Thanks for the replies.

Hey paulb, I am pretty sure my headphones are not clipping, they are sennheiser HD 580, they dont start clipping until ear splitting levels.
Project 84 is a bit hefty. I want something small because my headphone amp is small and there is not much space in the case.

I preferably want something that uses an op amp.
There is an op amp based bass boost circuit on Headwize.com but it is not so great.

paulb · 29th August 2003, 02:20 PM

I've got HD580s as well and the bass response seems fine.
Have you got access to a graphic equalizer? How about using that as a temporary check - feed it to a buffer op amp like the OPA2134 and adjust it until you like it. Then you'll have an idea of the bass boost you want. I did this with a friend once and it turned out he could use standard bass/treble controls to get the sound he wanted.
In any event, if you post the results both here and at Headwize I'm sure somebody will come up with a solution.

28th August 2003, 11:03 PM	#1
lawbadman diyAudio Member Join Date: Mar 2003 Location: St. Catherine, Jamaica	bass boost Hey guys Does anyone know of a good bass boost circuit? I want a circuit to boost frequencies of 80hz down (subwoofer region), for my headphone amp, the bass from my cd player is too low and the bass boost on the cd player sounds nasty. I have tried many circuits, but most of them kill the treble. Anyone know any good circuits?

28th August 2003, 11:18 PM	#3
mwmkravchenko Mark Kravchenko --- www.kravchenko-audio.com diyAudio Member Join Date: Jan 2002 Location: Perth Canada	good bass circuit Marchand electronics has the BASSIS circuit. It is extremely flexible. Audio magazine in the late 80's had a complete article in it including PCB Patterns. I can't remember when but I will check. Your fortunate I found it april 1990. Mark

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28th August 2003, 11:13 PM	#2
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	Perhaps project 84 at www.sound.au.com? Some form of graphic equalizer will give you the most flexibility. Are you sure your headphones can handle the bass at the level you want? Maybe the bass boost is driving your headphones into clipping. Also make sure you check out the projects at www.headwize.com (Library/Projects). Scroll down to "Signal Processors". Actually, start there first.

28th August 2003, 11:34 PM	#4
lawbadman diyAudio Member Join Date: Mar 2003 Location: St. Catherine, Jamaica	Thanks for the replies. Hey paulb, I am pretty sure my headphones are not clipping, they are sennheiser HD 580, they dont start clipping until ear splitting levels. Project 84 is a bit hefty. I want something small because my headphone amp is small and there is not much space in the case. I preferably want something that uses an op amp. There is an op amp based bass boost circuit on Headwize.com but it is not so great.

29th August 2003, 02:20 PM	#5
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	I've got HD580s as well and the bass response seems fine. Have you got access to a graphic equalizer? How about using that as a temporary check - feed it to a buffer op amp like the OPA2134 and adjust it until you like it. Then you'll have an idea of the bass boost you want. I did this with a friend once and it turned out he could use standard bass/treble controls to get the sound he wanted. In any event, if you post the results both here and at Headwize I'm sure somebody will come up with a solution.