ESI Aktiv 10S

44

Active Subwoofer

  • Equipped with: 10" Speaker
  • Power: 50 W
  • Frequency range: 30 - 200 Hz
  • Adjustable subwoofer separation frequency: 50 Hz - 180 Hz
  • Adjustable separation frequency for satellites: 100 Hz / linear
  • Volume control on the back
  • Phase switch
  • Balanced inputs XLR and 6.3 mm jack
  • Balanced outputs XLR
  • Power Mode: Standby or continuously on
  • Footswitch connection for mute function
  • MDF housing vinyl-coated with bass reflex system
  • Dimensions: 340 x 340 x 340 mm
  • Weight: 14 kg
available since June 2013
Item number 316252
sales unit 1 piece(s)
Components 1x 10"
Power 150 W
Frequency range 30 Hz – 200 Hz
Conectors Jack, XLR
Measurements 340 x 340 x 340 mm
Weight 14,0 kg
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$196
The shipping costs are calculated on the checkout page.
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Ok for the price range but...
TomTom51 23.01.2021
-first it is very not flat, 30Hz cutoff specs is very kind, maybe at-20dB then? And even with the lowest cutoff dial? Basically just a potatoidal frequency response.
-add to that that specs are wrong: the 100Hz cutoff for satellite is wrong, this is actually 50Hz and the switch is reversed also. I swapped between 3 different units I think (hanks Thomann) before doing the measuremtns by myself... And obviously no news from the manufacturer since I presented them the final results showing their device was not to specs...
-so both combined it doesn't make it very useful by itself, plan separate equalization for the sub and for your satellites if you want to do something clean...
But I still kept it because in the price range it has nice options (phase, footswitch...), and once separate equalization is achieved the entire setup sounds nice. Just beware of what you are buying.
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5
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Shaf 28.11.2020
great build, if you use it with 5inch nearfields, you will notice a big difference in sound. the low frequencies become tight and clean.
If it doesn't sound good, don't blame the speaker, just go and find some good instructions online how to properly set up your subwoofer..
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3
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A
It broke down the next day it arrived.
Alex.Stoian 02.03.2021
Ok, so there were some issues with it.
First, i had to pay 50 pounds customs fee because of brexit and it delayed the shipment nearly a week. (thanks EU)
Second, it broke down the next day it arrived and i ended up repairing and improving it.

Initially it would sound kinda hollow and it wouldn't get very low in frequency. I tryied to adjust it as best as possible with my 5" monitors and left it at that. But the next day, i left everything powered on and went to the store to buy something. When i came back there would be power but no sound.
I opened it up and for some reason it had some resistors blown. After more investigation, nearly all the opamps were fried too. It turns out that a rectifier transistor was faulty and it gave 22v instead of 15v. Because of it the opamps fried and this led to the resistors blowing as well.
So i decided to replace them all and change all caps with Nichicon high grade audio caps.
I increased the high voltage caps in the source from 220uf to 470uf. In the output section i replaced the 2200uf with 4700uf, the 470uf with 1000uf and the 220uf with 470uf.
All i can say now is wow! It is a beast! It is loud, it sounds deep and full and you can clearly hear and feel frequencies as low as 27hz but most of all it completes the low end on my 5" monitors perfectly and i couldn't be happier.

With the customs fee and parts i probably ended up paying nearly double it's price, but i'm glad it sounds good now.

If anyone wants to make the same modifications, be carefull with the power sourse pcb because it is realy cheap and double layered and the vias get broken easily. Also if you are going to replace the 2200uf with 4700uf, be sure to change the 1Kohm bleed resistors with 2 Watt ones.
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2
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Woofin' Brilliant
Evan.richars39 20.01.2021
this has definitely helped me produce better mixes. This sub was a great addition to my 2x 5-inch monitors. The low end on the monitors alone is good, but this is a whole new level.
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