Amp quieting links and info.
Feb 24, 2007 11:14:46 GMT -7
Post by ThomasW on Feb 24, 2007 11:14:46 GMT -7
I'll upgrade this as I find new links and info
Chasw98's webpage where he uses a resistor to slow the fan speed of a Berhringer EP2500
Link to our original thread discussing this topic. (Note all the pertinent info from the old thread is condensed in this thread)
Agoraquest Form thread with pictures for Behringer mods. A little to much 'bling' for my tastes...
-------------------------------------------------------------------------------------
Fan for the Behringer amps
Panaflo FBA08A24L1A, 24V, 80x25.5, 21dB
Digikey P/N P9739-ND, $8.25
"Get it at www.digikey.com. It's 21db and you can't hear it beyond a couple feet and you really have to strain to hear it closer than 2'."
-------------------------------------------------------------------------------------
Chrisbee's EP2500 fan replacement info
The original fan is a standard PC size but runs on 24 Volts. I couldn't obtain a quiet Panaflow locally in 24 Volts so ordered a Papst from the Danish importer instead.
First you must remove the screws which hold the amplifier lid down. These are fixed along both sides near the top and along the back only at the very top. Don't start unscrewing the socket fixing screws further down at the back. You'll also have to remove the 4 screws which fix the lid down to the heatsink. Use a decent crosshead screwdriver to avoid damaging the screws. They are fitted quite tightly so you will ruin the screwheads with a poorly-fitting screwdriver!
Here are a some images to show what's involved in swapping the fan. The twisted red, black and white wires are the motor connection to the small PCB on the left. (seen from the front of the amp)
If you're past your guarantee period you could just snip the wires and use a connector block to join the new fan wires to the old ones wherever you consider convenient.
My amp is still under guarantee so I didn't want it to be blatantly obvious that I'd swapped fans.
Behringer do not approve of fan swaps. You can't really blame them considering the abuse they get in a live gig. The modded amp might be sold on with the quiet fan and nobody would be the wiser until the amp got fried. The unhappy new owner would then start badmouthing Behringer products. So keep your original Behringer fan in a safe place in case it's needed in the future.
The original fan wires have a little plug which is held to the PCB with hot glue. A scalpel or similarly sharp tool will release the glue and the plug can come free.
Careful examination of the tiny plug will show that it sits in a little holster which then sits on the pins protruding from the PCB. If you are lucky you may be able to do a plug swap in the original holster. My new Papst fan came with bare wires so I had to find a plug on another cooling fan which was compatible with the holster.
General view of Behringer EP2500 with arrow pointing to twisted fan motor wires.
Here's where the plug fits on the PCB pins.
The new silent Papst fan fitted. It blows air forward through the long, box-shaped heatsink.The fan sits in a thin, folded metal shell and is held by four long screws. The same screws hold the wire protective cage to keep fingers out of the fan blades.
Do not undo the four fan screws until you have the lid safely off the amp and can see inside.
Examples are: Panaflo FBA08A24L1A, 24V, 80x25.5, 21dB or 24 V Papst TYP8414L or 8414NGL (the Papst model difference lies in the bearing type)
I have monitored the amp temperature with a digital temperature probe and found a maximum of 4F above ambient after an hour of Metallica's Black Album at a steady 100dB on my RS meter. On action films the amp doesn't get enough exercise to warm up above ambient at all. In use a quite ticking can be heard if I stand close enough. A far cry from the roar of air from the original fan. Which could be heard form 12 feet away through the cones of my IB.
Here's a picture of the original Behringer fan. The size is 80 x 80 x 25mm.
Note that the wire is double insulated with a black sleeve over black and red. NOT the twisted R/B/W wires shown above.
It plugs into the small PCB on the left exactly as shown above.
Here's an image of the original plug within a plug. I had to buy a cheap fan with the same kind of plug because no local computer dealers sold the plug on its own.
---------------------------------------------------------------------------------------------
Info about fan mods for the Nady XA900/1100
A) I had to cut the pos/neg wires because the fans I bought didn't have the right connectors to connect to the PCB on the amp itself. I then soldered the wires and appropriately insulated the connections.
B) The fans I purchased were from my local Micro-Center store. 25MM computer fans. I found the models with ball bearings, as I didn't want the sleeve bearings to fail in a year or so, as typically happens.
C) The fans I picked out have a 25/26dB noise rating, much, much lower than the stock Nady fans.
Fan manufacturer: Cooler Master
Fan model #: SAF-B83
Fan size: 80 x 80 x 25mm
Rated voltage: 12V
Rotation speed: 2,500 RPM
Acoustical Noise: 26 dB(A)
Life expectancy: 50,000 hours
D) I can only hear a very slight amount of fan noise when I get within 2 feet of the amp. Again, it's a very slight noise.
E) The fans do a more than adequate job of pushing the heat off of the heat sinks for the amp. My Nady never even gets slightly warm and stays cool all the time.
----------------------------------------------------------------------------------------
Ken's post regardings his EP-2500 mod
Ken used a Sirocco brand fan
l did this mod the other day to my ep2500, l had trouble getting the original fan ( Bi-Sonic 24v 0.24A ) to quieten down much........ l started off with the 100 ohm resistor , it would'nt run....then a 86.then a 68..........ended up able to run on a 50ohm resistor but was still too loud .
l ended up getting an aftermarket one from a local supplier here that was 24v . 130mA ..........this runs np with the 100 ohm resistor and is a lot quieter and l can only hear it running when the reciever is at say -46 db and l sit about 5' from the amp.
l did reverse the fan while l was at it and it appears to work well that way....at one stage l even contemplated putting 2 12v fans in , locating the other up the front somwhere and would've done that if l was'nt happy with the amount of air being moved after this mod....anyway so far so good.........l'll give it a good run this weekend and make sure it cools ok....
--------------------------------------------------------------------------------------
John Gordon (QSC) who provided the following information in reference to upgrading their 24V fans
All the fans are roughly the same noise level, though they all make a different pitch sound that is perceived differently, or louder. The fans are in order of what I think the quietest ones are, with the first being the quietest:
FAN / Model
* Delta AUB0824L
* Delta AFB0824L
* Panaflo (Panasonic) FBA08A24L
* Papst TYP8414L
* SanyoDenki 109RO824H402
If you are going to replace the fan in your PLX, DCA, CX, or PL2 QSC amplifiier, important things you must consider are: Fan must be 24V (not 12V). Size is 80mm x 80mm x 25mm. Quiet fans are usually rated 23dB give or take. Most fans come without connectors, so you will have to reuse or purchase a new connector.
Chasw98's webpage where he uses a resistor to slow the fan speed of a Berhringer EP2500
Link to our original thread discussing this topic. (Note all the pertinent info from the old thread is condensed in this thread)
Agoraquest Form thread with pictures for Behringer mods. A little to much 'bling' for my tastes...
-------------------------------------------------------------------------------------
Fan for the Behringer amps
Panaflo FBA08A24L1A, 24V, 80x25.5, 21dB
Digikey P/N P9739-ND, $8.25
"Get it at www.digikey.com. It's 21db and you can't hear it beyond a couple feet and you really have to strain to hear it closer than 2'."
-------------------------------------------------------------------------------------
Chrisbee's EP2500 fan replacement info
The original fan is a standard PC size but runs on 24 Volts. I couldn't obtain a quiet Panaflow locally in 24 Volts so ordered a Papst from the Danish importer instead.
First you must remove the screws which hold the amplifier lid down. These are fixed along both sides near the top and along the back only at the very top. Don't start unscrewing the socket fixing screws further down at the back. You'll also have to remove the 4 screws which fix the lid down to the heatsink. Use a decent crosshead screwdriver to avoid damaging the screws. They are fitted quite tightly so you will ruin the screwheads with a poorly-fitting screwdriver!
Here are a some images to show what's involved in swapping the fan. The twisted red, black and white wires are the motor connection to the small PCB on the left. (seen from the front of the amp)
If you're past your guarantee period you could just snip the wires and use a connector block to join the new fan wires to the old ones wherever you consider convenient.
My amp is still under guarantee so I didn't want it to be blatantly obvious that I'd swapped fans.
Behringer do not approve of fan swaps. You can't really blame them considering the abuse they get in a live gig. The modded amp might be sold on with the quiet fan and nobody would be the wiser until the amp got fried. The unhappy new owner would then start badmouthing Behringer products. So keep your original Behringer fan in a safe place in case it's needed in the future.
The original fan wires have a little plug which is held to the PCB with hot glue. A scalpel or similarly sharp tool will release the glue and the plug can come free.
Careful examination of the tiny plug will show that it sits in a little holster which then sits on the pins protruding from the PCB. If you are lucky you may be able to do a plug swap in the original holster. My new Papst fan came with bare wires so I had to find a plug on another cooling fan which was compatible with the holster.
General view of Behringer EP2500 with arrow pointing to twisted fan motor wires.
Here's where the plug fits on the PCB pins.
The new silent Papst fan fitted. It blows air forward through the long, box-shaped heatsink.The fan sits in a thin, folded metal shell and is held by four long screws. The same screws hold the wire protective cage to keep fingers out of the fan blades.
Do not undo the four fan screws until you have the lid safely off the amp and can see inside.
Examples are: Panaflo FBA08A24L1A, 24V, 80x25.5, 21dB or 24 V Papst TYP8414L or 8414NGL (the Papst model difference lies in the bearing type)
I have monitored the amp temperature with a digital temperature probe and found a maximum of 4F above ambient after an hour of Metallica's Black Album at a steady 100dB on my RS meter. On action films the amp doesn't get enough exercise to warm up above ambient at all. In use a quite ticking can be heard if I stand close enough. A far cry from the roar of air from the original fan. Which could be heard form 12 feet away through the cones of my IB.
Here's a picture of the original Behringer fan. The size is 80 x 80 x 25mm.
Note that the wire is double insulated with a black sleeve over black and red. NOT the twisted R/B/W wires shown above.
It plugs into the small PCB on the left exactly as shown above.
Here's an image of the original plug within a plug. I had to buy a cheap fan with the same kind of plug because no local computer dealers sold the plug on its own.
---------------------------------------------------------------------------------------------
Info about fan mods for the Nady XA900/1100
A) I had to cut the pos/neg wires because the fans I bought didn't have the right connectors to connect to the PCB on the amp itself. I then soldered the wires and appropriately insulated the connections.
B) The fans I purchased were from my local Micro-Center store. 25MM computer fans. I found the models with ball bearings, as I didn't want the sleeve bearings to fail in a year or so, as typically happens.
C) The fans I picked out have a 25/26dB noise rating, much, much lower than the stock Nady fans.
Fan manufacturer: Cooler Master
Fan model #: SAF-B83
Fan size: 80 x 80 x 25mm
Rated voltage: 12V
Rotation speed: 2,500 RPM
Acoustical Noise: 26 dB(A)
Life expectancy: 50,000 hours
D) I can only hear a very slight amount of fan noise when I get within 2 feet of the amp. Again, it's a very slight noise.
E) The fans do a more than adequate job of pushing the heat off of the heat sinks for the amp. My Nady never even gets slightly warm and stays cool all the time.
----------------------------------------------------------------------------------------
Ken's post regardings his EP-2500 mod
Ken used a Sirocco brand fan
l did this mod the other day to my ep2500, l had trouble getting the original fan ( Bi-Sonic 24v 0.24A ) to quieten down much........ l started off with the 100 ohm resistor , it would'nt run....then a 86.then a 68..........ended up able to run on a 50ohm resistor but was still too loud .
l ended up getting an aftermarket one from a local supplier here that was 24v . 130mA ..........this runs np with the 100 ohm resistor and is a lot quieter and l can only hear it running when the reciever is at say -46 db and l sit about 5' from the amp.
l did reverse the fan while l was at it and it appears to work well that way....at one stage l even contemplated putting 2 12v fans in , locating the other up the front somwhere and would've done that if l was'nt happy with the amount of air being moved after this mod....anyway so far so good.........l'll give it a good run this weekend and make sure it cools ok....
--------------------------------------------------------------------------------------
John Gordon (QSC) who provided the following information in reference to upgrading their 24V fans
All the fans are roughly the same noise level, though they all make a different pitch sound that is perceived differently, or louder. The fans are in order of what I think the quietest ones are, with the first being the quietest:
FAN / Model
* Delta AUB0824L
* Delta AFB0824L
* Panaflo (Panasonic) FBA08A24L
* Papst TYP8414L
* SanyoDenki 109RO824H402
If you are going to replace the fan in your PLX, DCA, CX, or PL2 QSC amplifiier, important things you must consider are: Fan must be 24V (not 12V). Size is 80mm x 80mm x 25mm. Quiet fans are usually rated 23dB give or take. Most fans come without connectors, so you will have to reuse or purchase a new connector.