Quoted from Jack8765:Sorry if I’m missing something. Your kit adds an amp and a crossover (and a new sub), and that sends more mids and lows to the backbox. But how does that solve for the reflection issue with the mid-range speakers that you cite? Seems JJP could have just adjusted the crossover points? I’m interested in your solution, just trying to make sense of the logic and why this would negate the need (or desire) to add a soundbar. Thanks.
No worries Jack8765 - you clearly read and understood our JJP blog post. (https://pinwoofer.com/blog/pinwoofer-jersey-jack-audio-overview/)
There are filters (including crossovers) in different parts of our system. However, it makes more sense to me to talk about what we did in terms of the audio spectrum so I attached a Bode Plot showing level versus frequency. What you see in the plot is the spectrum as we modify it, prior to feeding it into the PinWoofer pre-amp. What you might commonly think of in terms of a crossover point between the cabinet and backbox is somewhere between box A and box B, internally, because our cabinet and backbox amplifier stages are separate with individual level controls. Here are the design goals we used for JJP:
(Green Line - pre-amplifier input reference)
Goals:
Box A - increase bass to the cabinet and backbox stages,
Box B - increase mid-range to the backbox stage,
Box C - attenuate treble to the backbox stage.
So to answer your question, yes, we send more mids and high bass to the backbox. We also trail off the treble and while you might think box C is dramatic, it's not. There is an abundance of high end. So much so that guys usually report back with middle adjust of the treble control if not less. This is owing to the forward facing tweeters that are at ear level. When you add amplification and dynamic range it is necessary to attenuate the treble a bit in this case, but the result is a brilliant high-end.
While we do not claim to have solved the topology problem (the reflection of the mid-range drivers), this was our attempt to address / mitigate the issue as much as possible. We found the "tinny" effect to result from the C box (i.e. tweeters stronger than the mid speakers) so we biased the expander board to ring up the frequencies below that band, and attenuate the frequencies within it. We think it helped.
Sound Bars. The CE Sound Bar has an integrated mounting solution but adding one later is going to be a pain to secure and you'll have the wiring. Your results will also depend on the sound bar you select. If you do, be careful not to select a mono bar since you'll end up mashing stereo from the stock backbox with mono. Other concerns if its a 3-channel bar. A good stereo sound bar is not cheap and many units have small speakers (2" - 3") which don't really improve the mids and high-bass. When we tried it the sound field quality was not dramatically improved. Some sound bars have larger speakers but they scale up in cost, weight and size rapidly.
Adding external components are work to get right and may end up costing more than simply adding the PinWoofer system. It's debatable that you'll get a equivalent or better result and it certainly won't be integrated.
Best wishes regardless of what you choose to do; we're here to provide a stellar option that drops in quickly and delivers great results.
Here is the GnR system we recommend:
https://pinwoofer.com/pinwoofer-gt-8in-jjp-super-kit/
Thanks for your time!
JJP NA Response A B (resized).jpgKontrols (resized).JPG