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Class D Switching Power Amplifiers and Power D/A conversion

Low power AMPs for active speaker
Low power AMPs for active speaker
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Old 2nd April 2017, 12:03 AM   #1
panduro is offline panduro  Denmark
diyAudio Member
Join Date: Mar 2010
Location: Frederiksberg, Denmark
Default Low power AMPs for active speaker

Hello guys,

Im building a par of active 4 Way speakers for our home cinema room.
Xover Will be minidsp.

The lows(2xjbl 2225) Will be Powered by a Yamaha p3500s pa amplifier so i Got what i need there.

Sensitivity of the drivers
Mids (8ohm) 99db
U Highs(8ohm) 105 db

I have large solid State and pa amplifiers enoughf to drive Them, but i dont wanna waste all that power, when its really not needed.

So i have been looking for low power class d AMP modules to drive my speakers(except for bass drivers).
Ran into the hypex UCd Mp series(32-34-36) on Their website. Anybody Got experience with those modules?

Any other suggestions on Well sounding modules and smps(either seperate or on board) that Will give me atleast 15 watts(8ohm) pr channel and wont set me back over 300 euros for 6 channels?

Best regards

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Old 4th August 2018, 02:13 PM   #2
osram is offline osram  Germany
diyAudio Member
Join Date: Aug 2013
Location: Hamburg
Hi panduro,

one year is gone .. and I wanna ask you, are you lucky with your home project?

I've read your story about 'pro driver sound with only 15 watt?' in 2013.
I was with you for a long time in this thread .. to go with the fane colossus 15xb.

Today I am waiting for a pair of new 15xb's.

I want to tell you this, because my own experiences show me, that imo the jbl 2226 is not a really 'deep' bass player .. imo you can go down to ~40Hz only active lowXover/powered.
Your 2225 is very similar to the 2226.
I try it with a passiv Xover up to 200Hz in a diy 4507cab .. but the lower midrange was so terrible louder than the bass, with the effect that I stopped my ambitions.

How much experience with the 2225 do you have?
.. passiv or active, Xover, BRcab,
enough bass and mids ..?

My new way with the 15xb is based on the british dubsoundsystem scene.
Some of these guys talk about the fane 18xb/xs, 15xb etc. ... especially in 'bloodandfire.co.uk' and 'speakerplans.com'.
I should test the 15xb in the 4507cab ..
and in the Fane 'compact 125 liter cabinet for 1 x 15" driver' too ..
I'm sure that you already have heard of this cabinet.

I hope that the 15xb's are the better choice for my powerhifiAdventure.

Kindly regards from north germany
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