Amplification B&C 21DS115 8ohm
Printed From: Speakerplans.com
Category: General
Forum Name: General Forum
Forum Description: Open Discussion / Questions
URL: https://forum.speakerplans.com/forum_posts.asp?TID=106182
Printed Date: 16 April 2024 at 2:46pm
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: Amplification B&C 21DS115 8ohm
Posted By: JPF
Subject: Amplification B&C 21DS115 8ohm
Date Posted: 27 March 2021 at 6:40am
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Hi, I have an amp Matrix XT10000MF to amplify 2 scoops loaded with B&C 21DS115 8ohm driver. What do you think is the best way to do the amplification: - One scoop per channel at 8ohm - The 2 scoops from one channel at 4 ohm If eventually I get another 2 scoops, do you think the Matrix will do the job to move 2 scoops per channel? Thanks for your replies!
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Replies:
Posted By: FOO
Date Posted: 27 March 2021 at 7:59am
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That should be a easy thing to figure out. You got 3500watt pr channel into 8ohms. 5000 watt pr channel into 4 ohms. So that will give you 3500watt into each scoop if running one scoop from each channel. But only 2500 Watts into each scoop if running both from one channel. Its a no-brainer  |
Posted By: Conanski
Date Posted: 27 March 2021 at 5:27pm
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Either way you have more than enough power to melt the voice coils. 1700w AES means a signal with 6dB crest factor, the 3200w rating is with 12dB CF. With sine waves this is an 850w driver. |
Posted By: bob4
Date Posted: 28 March 2021 at 6:06am
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Here is some interesting discussion about powering these drivers: It's about the voltage capability of amplifiers. Due to the high output power, your amp should be well suited and capable of delivering the required high voltage peaks, but there is one caveat: since the continuous output power is so high, there is the risk of overpowering and killing your drivers if you don't limit the average level of the signal. You can probably run two drivers in parallel per channel without problems....
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Posted By: JPF
Date Posted: 29 March 2021 at 2:49pm
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Thanks for the comments! I think as long as I have only 2 scoops I will power esch one from a channel at 8ohm. If I get another 2 lets see if the amp is able to do 2 per channel. |
Posted By: Conanski
Date Posted: 29 March 2021 at 4:02pm
| It will drive 4 boxes just fine. Despite that apparent large power differential(1000w) that only adds about 1.5dB if and only if some or all of that power isn't lost in heat.. which is a very high possibility at this power level. For all intents and purposes there won't be an appreciable difference in output between a single box driven with 2500w vs 3500w, but doubling the number of boxes from 2 to 4 will add 6dB total output. |
Posted By: toastyghost
Date Posted: 05 April 2021 at 1:11pm
| Your issue is going to be something other than wattage. Peak voltage swing is important with those motor assemblies. |
Posted By: JPF
Date Posted: 08 April 2021 at 3:23pm
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Thanks so much for the advice. What could I do to handle these peak voltage issues with the Matrix amp and what could be the consecuences of it? |