Hi everyone.
I have recently puchased a Crown D75-A amplifier to power my Dynaudio Acoustics BM-6 monitors. I must say it sounds sweet!
However, I thought the D75-A was supposed to be completely quite, but I have found that my D75-A isn't. It has a low "buzzing" sound. Nothing to serious but enough to annoy me because I have the amplifier on my desk. The sound decreases when I put some pressure on top of the amplifier with my hand.
Is this normal for the D75-A or is there somthing wrong with mine?
Best regards, Rasmus Nielsen.
1
D75A - noise
Started by nielsenr, Nov 13 2005 04:09 PM
3 replies to this topic
#2
DGlass
-
- Members
-
- 2,541 posts
.
Posted 14 November 2005 - 09:35 AM
This sounds like a mechanical vibration that is being induced by the AC transformer. There isn't much you can do about it except to apply a little pressure to the lid, as you have already found. Some are quieter than others in free space. Placing a D75 in a rack, with equipment touching it, usually elevates the mechanical noise as well.
#3
Ancient Audoiphile
-
- Members
- 8 posts
Posted 15 November 2005 - 07:11 PM
Hi David
Unfortunately, I have the same problem with my three D-75A amplifiers. A faint, 60 hertz mechanical buzzing sound coming from the AC transformers. I thought about popping the bottom cover and wedging a small piece of foam rubber between the transformer and the bottom cover.
Is this a good idea? Or am I just buying a whole lot of trouble with heating issues?
Oh, I am sure your wondering what am powering with a K2, K1 and three D-75A amplifiers. For now, my system is a 15" quad amplified 4-way. But, eventually I will get around to adding the sub-woofers.
Just go to the following site and read a complete description of what I am building.
http://www.audioheritage.org/html/perspect.../audiophile.htm
Thanks
Unfortunately, I have the same problem with my three D-75A amplifiers. A faint, 60 hertz mechanical buzzing sound coming from the AC transformers. I thought about popping the bottom cover and wedging a small piece of foam rubber between the transformer and the bottom cover.
Is this a good idea? Or am I just buying a whole lot of trouble with heating issues?
Oh, I am sure your wondering what am powering with a K2, K1 and three D-75A amplifiers. For now, my system is a 15" quad amplified 4-way. But, eventually I will get around to adding the sub-woofers.
Just go to the following site and read a complete description of what I am building.
http://www.audioheritage.org/html/perspect.../audiophile.htm
Thanks
#4
DGlass
-
- Members
-
- 2,541 posts
.
Posted 16 November 2005 - 02:37 PM
QUOTE(Ancient Audoiphile @ Nov 15 2005, 07:11 PM)
Hi David
Unfortunately, I have the same problem with my three D-75A amplifiers. A faint, 60 hertz mechanical buzzing sound coming from the AC transformers. I thought about popping the bottom cover and wedging a small piece of foam rubber between the transformer and the bottom cover.
Is this a good idea? Or am I just buying a whole lot of trouble with heating issues?
Oh, I am sure your wondering what am powering with a K2, K1 and three D-75A amplifiers. For now, my system is a 15" quad amplified 4-way. But, eventually I will get around to adding the sub-woofers.
Just go to the following site and read a complete description of what I am building.
http://www.audioheritage.org/html/perspect.../audiophile.htm
Thanks
Unfortunately, I have the same problem with my three D-75A amplifiers. A faint, 60 hertz mechanical buzzing sound coming from the AC transformers. I thought about popping the bottom cover and wedging a small piece of foam rubber between the transformer and the bottom cover.
Is this a good idea? Or am I just buying a whole lot of trouble with heating issues?
Oh, I am sure your wondering what am powering with a K2, K1 and three D-75A amplifiers. For now, my system is a 15" quad amplified 4-way. But, eventually I will get around to adding the sub-woofers.
Just go to the following site and read a complete description of what I am building.
http://www.audioheritage.org/html/perspect.../audiophile.htm
Thanks
You shouldn't have a problem adding a piece of foam but make sure it won't melt or ignite if it gets hot. I can't guarantee that this will fix it completely either.
