SMP100

Received this OSD SMP-100 subwoofer amp on January 9th 2020, after looking at different models this one made the most sense. After hooking it up and doing my tests this amp was exactly what I needed to include in my whole house audio system. This sub amp works excellent wired into my receiver and my 4 zone 8 speaker selector switch for my ceiling speakers with a separate not passive but an 8 inch active subwoofer, if it is wired and set up correctly this little amp @ 80RMS 100watts of power into 4 ohms can deliver enough power to shake my whole house at quarter of the volume from watching a movie or playing music it’s very clean sound with no hum feedback, it has a phase control to adjust for sub placement, a crossover control so you can adjust and set the low pass to your desire level and an overall volume control to set the desire volume, it will automatically switch off after 15 minutes if no audio signal is detected so no need for you to switch on and off manually. My recommendation is not to use speakers that are more than 8 inch 4 to 8 ohms as stated in the manual. Following a correct set up this little amp will deliver a clean solid deep bass without being out of phase with your system. This sub amp can also be used for powering an in-wall passive subwoofer like the OSD IWS 8 series which I will be doing later.

I’m an old school audiophile replaced an 80’s Sound-craftsman amp. This new one works great

Didn't need a lot of power as I'm using with TV 5.1 sound system, as far as that goes works great. The amp detects when signal is coming in and LED goes from RED to GREEN and passive bass comes alive. I realized from photo and manufacturers website that speaker wire connection was thru a terminal block but it's really cheesy and loose as it's a plugin module(only part that doesn't feel quality at all), add to that how tight the 2 terminals are together and it's begging for a loose wire short. The screw down clamps do need seem to be able to hold the wire very tightly either. Why not use banana jacks like the 200W version as there seems to be plenty of room inside(I doubt the trigger input sees much use). May mod that at some point myself.

I have this running a 6.5 sub and it is doing great. Its got plenty to power my speaker and sound quality seems good. Auto on/off works like its meant to. I don't really like the red light that stays on on standby but that's not a big deal. It is very small and locates easily but gets the job done as well as a big amp.

Product box is not sealed, so the cover flipped right open - no AC cable was in the box, so who knows what happen This is the second amp I am purchasing, first works well and has for years... initiating an exchange

I'm running 2 passive 7in subs with this single amp and it perfect, my Receiver does not have a power output in the rear so auto shutoff was an important feature i was looking for. so far this little guy has worked splendidly.

The sub-in and the speaker connections need to be changed. They are very fragile and the slightest movement of the amp will cause the sub to disconnect.

I wanted a small external sub-amp for a custom subwoofer I built in the space between kitchen cabinets on 45 degree wall... I was looking to extend the bass that the celing speakers were struggling with... I also wanted something that went into standby when there was no sound to amplify... And this is it... Perfect :)