New Fully digital DDX amplifier, the UDP320

Posted by HiFimeDIY 12/03/2019 160 Comment(s)
We have received a lot of enquiries on when our UDP80 fully digital amplifier will be back to stock. So we are quite excited to share that we have a new version coming soon! The UDP320 is an upgraded UDP80, capable of 2X150W with USB and SPDIF inputs. This is not a DAC+amp in one, the digital DDX technology omits the need of a DAC. 
 
How does it work?
This fully digital amplifier is a PWD (pulse width modulation) amplifier that has no A/D conversion, no preamp and no analog signal path before the final output stage. It's kind of like a DAC with high power output capable of driving your speaker directly. But it’s different from other amps that are sometimes called powerDACs, as those are normally regular amplifiers with a DAC built inside.
 
The benefit of this technology is that the output is very clear and natural sounding and with a very compact size. There are fewer parts required which explains the small size, and also makes it possible to sell this great sounding amp at a low price. 
 
The UDP320 has an upgraded output stage compared to the previous version. It now use the same output stage as the T4 amplifier.
 
The amp requires an external power supply, a wide range from 15V to 56V DC is accepted. You’ll get lower distortion and higher output with higher supply voltage, so we recommend 48V to 55V for optimal performance. You can use the SMPS300RS 48V if you’re open to a little bit of DIY to connect everything together. Or the 60V adjustable power supply is also a great low noise power supply supply.
 
The UDP320 will come in a case similar to the udp80 but with individual speaker connection like on the UD80.
 
Estimated to be available beginning of May.  UPDATE: Available now here: https://hifimediy.com/udp320-fully-digital-amplifier
 
Add a comment below if you’d like to get notified when it’s available.
 
 
 
 

160 Comment(s)

Mike Casey:
12/03/2019, 07:59:06 AM
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Please let me know when a available, thanks.

Chris:
12/03/2019, 07:59:21 AM
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Yeahhhhhh finally

Chris:
12/03/2019, 07:59:23 AM
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Yeahhhhhh finally

Haden:
12/03/2019, 08:02:56 AM
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Good luck with the launch.

FredV3T:
12/03/2019, 08:09:24 AM
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Please keep me posted on this FDA availability. Thanks

Thorgal:
12/03/2019, 08:10:14 AM
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Please notify me in May.

Catalin:
12/03/2019, 08:20:27 AM
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Please update the usb input to accept higher rates and DSD. Thanks.

Ralf Skubowius:
12/03/2019, 08:21:50 AM
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A few time I have bought the T4 amp. Sounds great like 300b SE amp.

Simon:
12/03/2019, 08:22:42 AM
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Yes, please let me know when it is available

massimo:
12/03/2019, 08:24:06 AM
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Please notify me when available. thanks

Sergio Corda:
12/03/2019, 08:26:08 AM
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Please!!!

Sebastian Boldsen:
12/03/2019, 08:35:13 AM
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Yes, please let me know when it’s available!

Sang Ki Lee:
12/03/2019, 08:38:52 AM
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Great! Let me know when it is available.

Carmelo Fiorilla:
12/03/2019, 08:40:11 AM
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Excellent!

Dane:
12/03/2019, 08:43:58 AM
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Count me in. Can't wait.

Mark Lancaster:
12/03/2019, 08:44:30 AM
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When will you publish all the specifications not just power out? How much do you estimate the price will be? I would like to be notified when the UDP320 is ready for sale. Thanks Mark

justlistenin:
12/03/2019, 08:44:31 AM
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... interesting ... ;-)

Alan:
12/03/2019, 08:47:04 AM
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Ditto, please notify!

dave:
12/03/2019, 08:48:59 AM
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yes ! ! please let me know when this is available

Balazs:
12/03/2019, 08:50:29 AM
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I assume it won’t play any DSD format. Only PCM.

HiFimeDIY:
18/04/2019, 03:14:09 AM

Hi, yes it's only PCM.

Dag:
12/03/2019, 08:53:10 AM
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Pleas let me know when availanle! Tjanks!

HuHifi:
12/03/2019, 08:53:42 AM
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Lookin forward

Laz:
12/03/2019, 09:06:18 AM
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Looking forward to this! Please notify me when available.

Charlie:
12/03/2019, 09:08:08 AM
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Two of these would be perfect for an active speaker build! Please let me know when they are available.

Roberto:
12/03/2019, 09:10:27 AM
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Please keep me updated, thanks!

John Kaethner:
12/03/2019, 09:11:43 AM
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Hi, I had a Nuforce amp and I loved it. So I am definitely intrigued by the thinking and technology that has gone into this new amp of yours. Please notify when it becomes available. Many thanks for your attention. John

William Cochran:
12/03/2019, 09:17:36 AM
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Let me know. Thanks

JMC:
12/03/2019, 09:21:24 AM
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Please let me know when a available, thanks. JMC

Robin:
12/03/2019, 09:21:45 AM
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Great! Please tell me more in May

Marco:
12/03/2019, 09:21:49 AM
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Any specs, please?

Marco:
12/03/2019, 09:21:50 AM
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Any specs, please?

Marco:
12/03/2019, 09:21:51 AM
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Any specs, please?

Chris:
12/03/2019, 09:30:38 AM
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Thanks!

Pavlo:
12/03/2019, 09:31:36 AM
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Notify me also

Hugh:
12/03/2019, 09:35:28 AM
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Let me know more. Thanks.

Richard:
12/03/2019, 09:36:13 AM
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let me know

Simon:
12/03/2019, 09:39:40 AM
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Would love to know when it's available in May, thanks.

Forrest:
12/03/2019, 10:02:03 AM
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Let me know please!

Uncola:
12/03/2019, 10:12:51 AM
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Interested

Charles Carter:
12/03/2019, 10:14:03 AM
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Notify me please.

Pixangel:
12/03/2019, 10:21:43 AM
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Please notify me when available!

Stu:
12/03/2019, 10:30:30 AM
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Please notify me when it's available

Alex:
12/03/2019, 11:24:42 AM
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Please keep me posted on this FDA availability , regards

Rogério Neiva:
12/03/2019, 11:27:33 AM
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Please let me know when it's available. Any idea of the cost ?

Hazard:
12/03/2019, 11:29:33 AM
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Very interesting! Pls keep me updated as details become available.

Manfred:
12/03/2019, 11:32:03 AM
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Interested, therefore a message with price and lead time after start of final production would be fine!

Bongpal:
12/03/2019, 11:36:03 AM
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Please let me know when its available

Sam:
12/03/2019, 11:42:05 AM
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Please notify me when available.

Clive Wills:
12/03/2019, 11:42:10 AM
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Yes please

Luis DuLac:
12/03/2019, 11:52:44 AM
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Pls send details asap. I'm in!

angerer:
12/03/2019, 11:57:54 AM
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Pls notify

Martin Jakobsen:
12/03/2019, 12:04:55 PM
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Please notify me!

Olivier m:
12/03/2019, 12:10:39 PM
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Interested

Herman:
12/03/2019, 12:27:13 PM
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Let me know!

Brendon:
12/03/2019, 12:31:51 PM
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Please let me know

Dean:
12/03/2019, 12:54:02 PM
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Please let me know.

Bart:
12/03/2019, 12:57:32 PM
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Please inform me, I'm looking forward to it!

Dan:
12/03/2019, 01:00:33 PM
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Please advise ASAP. Thanks

Bradley Swanson:
12/03/2019, 01:03:20 PM
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Yes, please

PD:
12/03/2019, 01:20:37 PM
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Can this drive 6 OHM speakers?

Steve:
12/03/2019, 01:57:46 PM
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Yes, please notify me when the UDP320 amplifier becomes available.

Chris:
12/03/2019, 02:03:46 PM
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Please let me know when this is available

DavidBroster:
12/03/2019, 02:25:18 PM
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please notify me when you are ready for shipping the UDP320 .....

Haley:
12/03/2019, 02:28:26 PM
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Please notify when available.

Bence:
12/03/2019, 02:33:26 PM
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Please notify me when available Thanks

Haley:
12/03/2019, 02:35:15 PM
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What is the chipset? Is it binary or ternary PWM?

Dave:
12/03/2019, 02:42:27 PM
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Keep me in the loop, thanks!

Olivier:
12/03/2019, 02:57:18 PM
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Interested to hear this new actor in FDA field

Keith Anderson:
12/03/2019, 03:14:17 PM
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info pls

Dan F.:
12/03/2019, 03:17:50 PM
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Let me know when it's available. Thanks

Helmasur:
12/03/2019, 03:44:34 PM
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Very interesting!!

Michael Kleven:
12/03/2019, 04:19:56 PM
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Let me know whwn it’s avaliable - thanks.

Mike Jennens:
12/03/2019, 04:20:21 PM
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Looking forward to it!

S. Ramdass:
12/03/2019, 04:31:33 PM
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Please let me know.

C Tsai:
12/03/2019, 04:35:16 PM
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please inform me when it is available. Thanks

Joe H.:
12/03/2019, 05:33:40 PM
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Just let me know. Thanks!

Peter:
12/03/2019, 06:02:26 PM
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Please notify me when available/Pre-order.

Nick:
12/03/2019, 06:04:14 PM
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Notify me also please.

HL:
12/03/2019, 06:19:09 PM
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Please notify when available.

Karl:
12/03/2019, 06:31:18 PM
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Please notify me when it's available.

Alan Ballagh:
12/03/2019, 06:37:06 PM
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Yes count me in please, I was late to the party the first time around and I would like to try this.

Onkar Bhachu:
12/03/2019, 06:56:10 PM
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Great! Let me know when it is available.

Ketil Ingebrigtsen:
12/03/2019, 07:00:32 PM
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Interesting!

DAW:
12/03/2019, 07:19:23 PM
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Notify me when available, please

tal:
12/03/2019, 07:25:19 PM
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Keep me posted, thanks!

Eli Belous:
12/03/2019, 07:33:52 PM
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Please notify me when UDP320 is available.

Robert Brodersen:
12/03/2019, 07:46:08 PM
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Please notify me. Also, built in Bluetooth would be fantastic addition!!!

HiFimeDIY:
18/04/2019, 03:16:39 AM

Hi, yes bluetooth would be nice, but it won't happen on this version. You could use an external bluetooth (or wifi) receiver with optical output.

Antonio Palumbo:
12/03/2019, 08:52:21 PM
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Per me know

Niklas G:
12/03/2019, 09:29:11 PM
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Please let me know

José M:
12/03/2019, 10:06:30 PM
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I wanna know

Paul:
12/03/2019, 10:08:42 PM
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I like the ideea. Very interested. Let me know in May.

Me too:
13/03/2019, 12:22:49 AM
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Me too

David Elam:
13/03/2019, 12:58:47 AM
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interested. let me know.

Adrian:
13/03/2019, 01:02:44 AM
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Please notify me.

Ken:
13/03/2019, 01:03:42 AM
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Count me in

Alan Shum:
13/03/2019, 02:10:17 AM
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Let me know when it's available

Per-Olof Johansson:
13/03/2019, 06:25:10 AM
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Great! Please let me know when it’s available.

Rob:
13/03/2019, 09:17:46 AM
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Very interested! Looking forward to improving my laptop+dac+analogue amp setup.

Todd Verrone:
13/03/2019, 09:18:11 AM
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I'm very interested!

Rob:
13/03/2019, 09:27:55 AM
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ooh, nice. I'll have at least one, maybe three, but they have to have either coaxial SPDif input or alternatively i2s internal connectivity so I can fit my own coax interface.

HiFimeDIY:
18/04/2019, 03:18:04 AM

Hi, thanks for the feedback. This version only have optical SPDIF TOSLINK input (+USB). We can consider later if we can make another version with coax.

hubert:
13/03/2019, 10:12:52 AM
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please notify wen it's available

Sergie:
13/03/2019, 10:21:49 AM
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Please notify me!

Harmen:
13/03/2019, 11:59:37 AM
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Yes please! I think you can even notify everyone that you've send the announcement e-mail to.

Nicj:
13/03/2019, 02:27:37 PM
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Yes please

Nicj:
13/03/2019, 02:27:37 PM
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Yes please

Sergey:
13/03/2019, 03:02:26 PM
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Please notify me!

novi:
13/03/2019, 04:03:23 PM
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pls notify me when available

Andreas Faessler:
13/03/2019, 07:30:15 PM
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Please let me know

Atle Hagerup:
13/03/2019, 09:23:20 PM
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AH: Please notify me as soon as it is available, preferably in a case. In the mean time - Please provide some technical specifications...

Martin Jones:
13/03/2019, 09:45:47 PM
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Please notify me too!

Lars Mittet:
13/03/2019, 10:30:07 PM
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Please notify me!

Gabriel Abe:
14/03/2019, 01:01:33 AM
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Yes! I'll definitely buy some of these. Please notify me as soon as possible to order. Good job guys,

Christoph Wintersteiger:
14/03/2019, 02:47:46 AM
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Notify me too!

Ray:
14/03/2019, 03:52:54 AM
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Yes let me know, thanks.

AM:
14/03/2019, 09:40:26 AM
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Interested! Please notify me.

Mark:
14/03/2019, 06:24:01 PM
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Please notify me

Sasha:
14/03/2019, 10:57:19 PM
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Yes please

Jordi Gallardo:
15/03/2019, 08:53:14 AM
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Add me to the list, thanks!

Jc:
15/03/2019, 09:11:46 AM
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Yeah let me now that!! Thanks

Unsound:
16/03/2019, 12:14:00 AM
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Don’t make me wait too long now!

Noel:
16/03/2019, 05:00:19 AM
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Please let me know once it is available.

Michel:
17/03/2019, 11:49:42 AM
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Very interesting. I don't understand though for optical I/O.

HiFimeDIY:
18/04/2019, 03:20:07 AM

In additional to USB input it has a SPDIF Optical TOSLINK input. You can send a digital signal from a TV, Apple airport express, Chromecast Audio etc over optical.

Hafid:
18/03/2019, 12:49:12 PM, www.comm1possible.com
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Hey guys. As always, you're doing a great job. Please let me now when this amp will be available on may. Thanks

badri:
19/03/2019, 08:23:33 AM
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Please notify me.

Chris:
19/03/2019, 10:41:49 PM
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Please notify me when they are available thank you

Ryan:
20/03/2019, 12:39:58 PM
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wow just what I was after, keep me in the loop

cacio:
21/03/2019, 01:14:28 PM
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please think about an 2.1 solution. i really don't want to make passive crossovers. best solution would be to offer a 2.1 version with 2x STA516. the super clean 1 volume knob design should stay. but simply add (maybe to the back side) crossover and subwoofer gain adjustment knobs or something

haley:
25/03/2019, 02:49:19 PM

This ruins an amplifier IMO. Get a DSP.

haley:
25/03/2019, 02:48:18 PM
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STA516 supports awesome ternary PWM. Does this amp support it?

haley:
01/04/2019, 07:49:19 PM

Oh, maybe the DDX trademark also implies tristate/ternary PWM?

Hifimediy:
18/04/2019, 06:33:20 AM

It uses ternary PWM.

Sebastian Engen:
25/03/2019, 05:11:30 PM
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notify me

sebastien:
26/03/2019, 11:26:59 AM
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Please notify me, It will be the heart of an exciting project.

Alfred Kraut:
28/03/2019, 12:54:17 PM
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please notify me

Bruce Rosner:
28/03/2019, 01:20:02 PM
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Please notify.

Harmen:
29/03/2019, 11:04:31 AM
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I am a bit afraid that, because of the light weight and small size of the amp, the position of the amp is guided by the tension of the cables that are connected, and will always be skewed to one side or move if you move a cable etc. A little bit bigger housing, and a bit more weight, for example, with an build in power source it would be a more sturdy / classy amplifier.

Peter:
31/03/2019, 09:24:46 AM

Just put some weight on top if it. Problem solved!

wayne:
30/03/2019, 05:09:13 AM
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please ping me

Dave:
02/04/2019, 10:12:45 PM
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Please notify me.

Daniel:
08/04/2019, 08:23:56 PM
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I have two questions: 1. Is it possible to use this amplifier in mono (bridge) mode? The sta516b datasheet shows maximum power up to 400 watts BTL (3 Ohm). 2. Is it possible to make i2s input also? I will use this amplifier after DSP (i2s output) and I want to avoid unnecessary conversion i2s to spdif.

HiFimeDIY:
18/04/2019, 03:27:59 AM

Hi. The output can not be bridged in this configuration the chips are used. And it doesn't support direct i2s input. We have made it simple to avoid complications and software bugs.

Maxxdom:
09/04/2019, 11:57:33 AM
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Please notify me when available.

Dave:
10/04/2019, 04:41:46 PM
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Yes please

Gianluca Fantato:
11/04/2019, 12:58:17 PM, Audibilia.it
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Please, let me advised when available.Thanks.

Petr Karafiát:
14/04/2019, 07:29:29 AM
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Info please

Sean L:
15/04/2019, 09:55:20 PM
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Notify me when available!

David Mann:
21/04/2019, 07:12:14 PM, www.freshcutsoundeffects.com
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Yes , please let me know when it is available

Cy:
24/04/2019, 12:07:38 AM
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Yeehaa. Please do let me know. Cheers

PeterD66:
29/04/2019, 09:05:58 AM
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Please notify me too, such I can order 1 (or two ?)

Timothy Britten:
29/04/2019, 06:49:08 PM
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Hi there hifimediy... Please notify me when this amp is ready to roll......! x

xauser:
30/04/2019, 11:08:56 AM
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Let me know about updates

B C:
30/04/2019, 01:10:34 PM
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Let me know.

Kenneth McKay:
30/04/2019, 08:38:00 PM
Reply

Please keep me posted.

Karl:
02/05/2019, 01:15:25 AM
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Let me know.

Dave:
02/05/2019, 10:03:03 AM
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Please let me know

HiFimeDIY:
03/05/2019, 09:34:38 AM
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Hi guys, thanks for the overwhelming response! We have now started production and should have the first batch ready to ship in the first week in June. Sorry it is a month later than we aimed for, because we made some further revisions and tweaks. We will post some more data and information soon.

sasha:
06/05/2019, 11:49:16 PM

Thats good news. How would this work with a multi amp setup with active crossovers? Would there be any clock issues if using multiple of these amps with split digital inputs?

Raymond CK Au:
20/05/2019, 12:24:01 AM

When will it open to order and what is the price of this unit?

HiFimeDIY:
23/05/2019, 10:00:40 AM

You can place an order now: https://hifimediy.com/udp320-fully-digital-amplifier

Erik:
03/05/2019, 05:30:48 PM
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please keep me informed, it looks great!

Francis:
03/05/2019, 10:22:53 PM
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Me too, Thanks.

Sean:
04/05/2019, 03:35:00 PM
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Please make a version with coax input for use with MiniDSP nanoDigi for active crossover designs.

nico:
07/05/2019, 11:24:16 AM
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Bonjour, s'il vous plaît me tenir au courant,d'avance merci. Cordialement.

Rik Bach:
07/05/2019, 01:16:39 PM
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Hi, yep me too thanks!

HiFimeDIY:
23/05/2019, 10:01:19 AM
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Finally it's available for pre-order, and will ship soon in June! https://hifimediy.com/udp320-fully-digital-amplifier

dspjoe:
25/05/2019, 04:10:50 PM
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since the STA320 is used, is there a way to access it (through USB) and to setup the DSP ? Idea is to run 2x UDP320, with active crossover on the amp itself, so I would just need a "Y-optical cable" to feed the amps with the same signal. I guess the USB port itself would not pass through the functionality. But does the PCB has points for the direct programming connection to STA320?

HiFimeDIY:
04/06/2019, 02:16:40 AM

Hi, no it's not possible to setup DSP through USB unfortunately.

ThierryJ:
20/06/2019, 09:08:48 AM
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Hi, Is it possible to directly use the I2S input ? Thanks and best regards

HiFimeDIY:
20/06/2019, 09:45:14 AM

Hi, now that's not possible on this amp unfortunately.

ThierryJ:
21/06/2019, 07:56:07 AM
Reply

Hi, Even with some clever tweaking ? Thanks

HiFimeDIY:
21/06/2019, 09:29:49 AM

You could remove optical receiver and connect i2s to 74lvc157 (U7). As in this photo. https://hifimediy.com/image/Screenshot%202019-06-21%20at%2011.27.51.png However, the MCU will not read cs8416 then so it might not work. So you might have to remove 74lvc157 and connect like in this drawing: https://hifimediy.com/image/Screenshot%202019-06-21%20at%2011.27.35.png Then USB will also not work, only i2s will work. i2s should be 3.3V level

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