miniDSP releases 1kW & 2kW plate amplifiers - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > miniDSP

miniDSP Low cost, modular Digital Signal Processor (DSP) kits for the DIYer from miniDSP.

Reply
 
Thread Tools Search this Thread
Old 1st August 2011, 11:07 AM   #1
minidsp is offline minidsp  Hong Kong
diyAudio Member
 
minidsp's Avatar
 
Join Date: Dec 2009
Smile miniDSP releases 1kW & 2kW plate amplifiers

Dear All,

New products, new projects, new ideas..

Introducing the PWR-DSP series. Three new plate amplifier models with embedded DSP, IP control over Ethernet/Wifi, audio streaming over networks and stellar performance from the Pascal Audio amplifier modules. In brief, this is not the type of plate amplifier you would find on a Wallmart subwoofer! :-)

PWR-DSP1: 1x2400Wrms, 1x4000Wpeak
PWR-DSP2: 2x800Wrms, 1x1300Wrms (bridged)
PWR-DSP3: 1x2400Wrms + 2x700Wrms

Want to read more? Check it out for more info here.

Have fun,

DevTeam
__________________
www.minidsp.com - Low cost & modular audio DSP kits for DIYers - Follow our tweets @ minidsp
  Reply With Quote
Old 3rd August 2011, 01:33 PM   #2
doug20 is offline doug20  United States
diyAudio Member
 
Join Date: Mar 2009
Could we see the measured 24000Wrms and 4000Watt peak??

I have dual LMS5400 subs, Im using a plate amp on one (2000W rms) and a Crest pro audio amp on the other but the PWR-DSP series is something Im interested in.
  Reply With Quote
Old 13th August 2013, 06:14 PM   #3
diyAudio Member
 
Join Date: Dec 2011
I am unclear on how the DSP capabilities of the PWR-DSP3 compare to that of the 4x10 MiniDSP. I'm not really happy with any of the solutions to the on off thump and the multiple adapters and contortions I'll have to go through to be able to use it with 3 three way speakers. So I was looking at this as a possible solution.

The manual doesn't reference any plug ins like the the MiniDSPs do and it seems to have a more limited function set from the description. Is it possible to take an active crossover configuration from a MiniDSP and import it for use in a PWR-DSP unit?
  Reply With Quote
Old 13th August 2013, 07:02 PM   #4
diyAudio Member
 
Join Date: Mar 2007
Location: California
George,

Try using a relay that has a 120VAC coil to short to ground the output of the line level stages (e.g. after the MiniDSP) as soon as power is disconnected. The relay needs to switch within a few milliseconds, so an relay with an AC coil powered directly by the mains is a must. You will need to make sure that DC power to the MiniDSP continues to be supplied as least until the relay closes - you can probably do that by adding a few mF of capacitance to (or after) your existing supply.

When the relay contacts are not shorting the output to ground, the relay is out of the circuit and will have no impact on the sound quality, etc.

Typically what is happening is that the power supply for the line level stages is collapsing before the power amp power supply. When the mains power is removed the line level circuitry sends out some odd signals as it sputters out, while the power amp is still ready and able. This is likely the source of your thump. On the other hand, if the thump is coming from the amplifier itself, then this won't help. You can do some testing to make sure the problem is the MiniDSP.

If, however, the DC power can be sustained to the MiniDSP a little longer, the relay(s) should be able to short the output to ground before any bad noises can reach the amp.

You might look for a 4-pole relay with 120VAC coil like this DP one:
120 VAC RELAY, DPDT 12 AMPS | AllElectronics.com
or just get multiples of that one.

-Charlie

Last edited by CharlieLaub; 13th August 2013 at 07:05 PM.
  Reply With Quote
Old 13th August 2013, 07:19 PM   #5
diyAudio Member
 
Join Date: Dec 2011
Quote:
Originally Posted by CharlieLaub View Post
George,

Try using a relay that has a 120VAC coil to short to ground the output of the line level stages (e.g. after the MiniDSP) as soon as power is disconnected. The relay needs to switch within a few milliseconds, so an relay with an AC coil powered directly by the mains is a must. You will need to make sure that DC power to the MiniDSP continues to be supplied as least until the relay closes - you can probably do that by adding a few mF of capacitance to (or after) your existing supply.

When the relay contacts are not shorting the output to ground, the relay is out of the circuit and will have no impact on the sound quality, etc.

Typically what is happening is that the power supply for the line level stages is collapsing before the power amp power supply. When the mains power is removed the line level circuitry sends out some odd signals as it sputters out, while the power amp is still ready and able. This is likely the source of your thump. On the other hand, if the thump is coming from the amplifier itself, then this won't help. You can do some testing to make sure the problem is the MiniDSP.

If, however, the DC power can be sustained to the MiniDSP a little longer, the relay(s) should be able to short the output to ground before any bad noises can reach the amp.

You might look for a 4-pole relay with 120VAC coil like this DP one:
120 VAC RELAY, DPDT 12 AMPS | AllElectronics.com
or just get multiples of that one.

-Charlie
I don't have the minidsp hooked up to anything yet, but it is clearly an issue with the basic hardware design and it has been widely reported enough that I'm leery of just hoping it doesn't happen with my set up.

I've seen several solutions along this line mentioned, but I'm not thrilled with the idea of kludging something like this together to solve a problem that shouldn't have existed in the first place and adding yet another potential point of failure. It would be one thing if it was a little box or something I could just plug things into to fix this, but it isn't.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Scanspeak, Vifa, 1KW Sub plate amp sphinx Swap Meet 3 28th June 2009 04:12 PM
BluesNews ...your favourite monthly Releases and Re-Releases SigFire Music 15 10th March 2008 12:36 AM
2kw water cooled amp diya370 Solid State 16 29th December 2007 11:29 AM
Plate amplifiers? What to look for. NickZ Subwoofers 2 15th June 2005 01:34 AM
Plate Amplifiers needed Paradise_Ice Solid State 5 22nd March 2005 10:54 AM


New To Site? Need Help?

All times are GMT. The time now is 04:04 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2