Yes, at first I found it a bit confusing also. Look at this link Par-Metal This is the way the 20 series comes (with the vents). Actually, single vent rows on the top like mine, not the double as shown. If you need them to punch holes or do any other metal work, it is extra.
Made a mistake on the shipping from CA, they are in NJ. So NJ to VT still $52 and change total. To Chicago, maybe a bit more but they are only a few lbs.
Made a mistake on the shipping from CA, they are in NJ. So NJ to VT still $52 and change total. To Chicago, maybe a bit more but they are only a few lbs.
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My only qualm with their cases is the texture of the aluminum; it has a very coarse grain to it.
On the black anodized versions you will actually see a light powdery residue (skin, eww) if you rub your fingers across it. I hate to even touch the thing, it just feels bad.
On the black anodized versions you will actually see a light powdery residue (skin, eww) if you rub your fingers across it. I hate to even touch the thing, it just feels bad.
Integrated Class D Amp with Media Player
Dear All
I'm currently working on a design for an integrated class D amp with media player. Now I would like to share my work with you.
Supply section:
- 2x 150W AC/DC switched converter with wide range input
- buffer section with low impedance capacitors
- filter section with hf filter capacitors
Power amp section:
- circuitry based on IRF reference design
- 2x150W @4Ohm
- half bridge
Media player section:
- MP3/AAC/WMA/FLAC from SD card or USB stick
- Webradio with LAN streaming
- AMOLED touchdisplay
Appliance:
- 2 rotary encoder with push function for standby, volume, source and mute
- AMOLED touchdisplay
Case:
- anodised CNC machined aluminium
So far the mechanical design is done. The development work on the electronics and the firmware is ongoing.
I'll keep you updated.
Cheers
Twain
Dear All
I'm currently working on a design for an integrated class D amp with media player. Now I would like to share my work with you.
Supply section:
- 2x 150W AC/DC switched converter with wide range input
- buffer section with low impedance capacitors
- filter section with hf filter capacitors
Power amp section:
- circuitry based on IRF reference design
- 2x150W @4Ohm
- half bridge
Media player section:
- MP3/AAC/WMA/FLAC from SD card or USB stick
- Webradio with LAN streaming
- AMOLED touchdisplay
Appliance:
- 2 rotary encoder with push function for standby, volume, source and mute
- AMOLED touchdisplay
Case:
- anodised CNC machined aluminium
So far the mechanical design is done. The development work on the electronics and the firmware is ongoing.
I'll keep you updated.
Cheers
Twain
I'm actually testing a Linux/ARM platform with Rockbox running on but it's not yet settled because the OS is a bit laggy on this particular hardware. As an alternative I see an approach on same platform without OS but dedicated hardware decoder. Here the HMI wouldn't be so nice but also less laggy.
First go at class d, this one is 100watts using IRS2092.
An externally hosted image should be here but it was not working when we last tested it.
If the Linux based approach comes true then Wifi would be not a big deal by using a USB stick as Wifi hardware. Otherwise I rather don't see it.
Work in progress...
Low compromise 5 channel UCD400 in a Pesante Dissipante 4U nero case - 10mm front alu panel, all alu back/top/bottom panel - Side dissipators only rise a few centigrades...
Left, Right, Center: 400HG modules - Surround L&R - 400AD modules modified for higher SMPS voltage.
Three SMPS400 power supplies, in following layout:
1 SMPS - Center channel (defeatable)
1 SMPS - Front Left (+surround Right, defeatable))
1 SMPS - Front Right (+surround Left, defeatable)
Standby switch/12V trigger will be used to turn off rear & center modules, turning the amp into a dual mono 2 channel amp with 1 SMPS per channel.
I chose this particular setup based on "importance" of the channels.
Cable layout will feature mains power running through the center of the amp, between SMPS - signal cables to the extreme right & left, on the bottom of the amp. Speaker output running above the module height, towards the center.
Balanced build with Neutrik XLR connectors on the back.
Unit to be combined with Denon 4306 as 5 channel preamp - Wyred 4 Sound DAC-2 as 2 channel preamp/volume control, using HT bypass for the Denon. Sources PS3 and Squeezebox - possibly async USB/PC in the future.
Hope to reach my own audio nirvana with this setup, with little compromise between 2 channel and multichannel audio. (A check with Hypex told me that modules in standby draw little or no current from the PS)
To be continued...
Low compromise 5 channel UCD400 in a Pesante Dissipante 4U nero case - 10mm front alu panel, all alu back/top/bottom panel - Side dissipators only rise a few centigrades...
Left, Right, Center: 400HG modules - Surround L&R - 400AD modules modified for higher SMPS voltage.
Three SMPS400 power supplies, in following layout:
1 SMPS - Center channel (defeatable)
1 SMPS - Front Left (+surround Right, defeatable))
1 SMPS - Front Right (+surround Left, defeatable)
Standby switch/12V trigger will be used to turn off rear & center modules, turning the amp into a dual mono 2 channel amp with 1 SMPS per channel.
I chose this particular setup based on "importance" of the channels.
Cable layout will feature mains power running through the center of the amp, between SMPS - signal cables to the extreme right & left, on the bottom of the amp. Speaker output running above the module height, towards the center.
Balanced build with Neutrik XLR connectors on the back.
Unit to be combined with Denon 4306 as 5 channel preamp - Wyred 4 Sound DAC-2 as 2 channel preamp/volume control, using HT bypass for the Denon. Sources PS3 and Squeezebox - possibly async USB/PC in the future.
Hope to reach my own audio nirvana with this setup, with little compromise between 2 channel and multichannel audio. (A check with Hypex told me that modules in standby draw little or no current from the PS)
To be continued...
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Discrete class d amplfier at stripboard stage.
The pcb is an irs2092 pcb which i used for the output mosfets. decoupling and power supply.
The pcb is an irs2092 pcb which i used for the output mosfets. decoupling and power supply.
An externally hosted image should be here but it was not working when we last tested it.
Yes, I know I did "overkill" - but otoh, UCD400 needs a lot more cooling than the UCD180. If you check upwards in the thread, I had 2 of them in a small 1U casing and it ran way too hot.
my small 2x 15W rms amps
this one is the test model so the veneer on the box is not as good as on the others
this one and the blue one do not yet have the amp build in
they are 17,6x10x4cm and have a integraded smps
this one is the test model so the veneer on the box is not as good as on the others
this one and the blue one do not yet have the amp build in
they are 17,6x10x4cm and have a integraded smps
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this is one of the coolest.2x10W in a cf card size.
An externally hosted image should be here but it was not working when we last tested it.
Hi, folks,
This is my first DIY project, (at least since I assembled a Heathkit amp circa 1978): a Class D Audio SDS-258, (see HERE).
The case is homemade from MDF 😱 except for the back panel which is sheet aluminum. Not in the pic, but I have since added four LED power/standby indicators.
My set up is Sonic Frontriers Line 1 balanced preamp => SDS-258 => Magneplanar MG 1.6QR's. The result has far exceeded my expectations.
This is my first DIY project, (at least since I assembled a Heathkit amp circa 1978): a Class D Audio SDS-258, (see HERE).
The case is homemade from MDF 😱 except for the back panel which is sheet aluminum. Not in the pic, but I have since added four LED power/standby indicators.
My set up is Sonic Frontriers Line 1 balanced preamp => SDS-258 => Magneplanar MG 1.6QR's. The result has far exceeded my expectations.
An externally hosted image should be here but it was not working when we last tested it.
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Dear All
I'm currently working on a design for an integrated class D amp with media player. Now I would like to share my work with you.
Supply section:
- 2x 150W AC/DC switched converter with wide range input
- buffer section with low impedance capacitors
- filter section with hf filter capacitors
Power amp section:
- circuitry based on IRF reference design
- 2x150W @4Ohm
- half bridge
Media player section:
- MP3/AAC/WMA/FLAC from SD card or USB stick
- Webradio with LAN streaming
- AMOLED touchdisplay
Appliance:
- 2 rotary encoder with push function for standby, volume, source and mute
- AMOLED touchdisplay
Case:
- anodised CNC machined aluminium
So far the mechanical design is done. The development work on the electronics and the firmware is ongoing.
I'll keep you updated.
Cheers
Twain
Hi Twain
Great project, looks very nice! Any news on design progress?
PS: Your design looks a little like this:
Gato Audio - AMP-150 - High End Integrated Amplifier (Not class-D)
An externally hosted image should be here but it was not working when we last tested it.
dexco