Dayton Audio DS175-PR 6-1/2" Passive Radiator

I like to prototype speaker cabinets using cardboard first. I added this alongside the other driver and made it floor facing. Really brang that low-end to life without any additional speaker.

macht was er soll :) Xmax 8mm könnte mehr sein :)

I built a small subwoofer enclosure to fit under the back seat of a Nissan Frontier crew cab. Originally, the box had two Skar 6.5" subwoofers and it didn't sound good. Upon recommendation from a friend who is a audio professional, I replaced one of the woofers with this passive radiator. After a little bit of stuffing and tuning, it now sounds fantastic. Moving forward, now that I know the magic of a passive radiator, I will never go back. I plan to use this again for other projects.

It helped produce lower bass by a couple of decibels. I would buy again for another project on two per speaker instead of one. I thought my woofer had a very low volume ability before it made noises so I lived with it for 2 years. I just now found out it was the weight adding bolt on these radiators used to add washer weights to make them stiffer or less sensitive. If you do that make you put something on threads to make it fits tighter as mine were a little loose and rattled. I just took them out and now I can turn it up with no rattling noise.

I installed one of these 6.5 inch passive radiators in a sealed, shallow box with an 8" subwoofer. In installed the other on a sealed, shallow box with a 10" subwoofer in it. These passives really helped my boxes pump out about twice the amount of bass. With merely 50 watts per channel, my boxes now shake my chest and the seats in my car. I'm absolutely astonished.