[drphoto]

Ok this is starting to get embarrasing, but I'll fess up in the hopes it can save another servo sub builder some grief. As I've posted previously when I finally built H-frames (orginally had all the drivers in big flat baffles and firing forward) I originally just wired everything in a parallel manner. Sounded pretty good, but I wasn't getting the slam everyone was claiming. So after a post, Danny provided the wiring diagram for the V1. The parallel arrangement, especially for the servo coil was of course way wrong. So w/ a fix, a big improvement. (I know others have at least made this mistake)

However I noticed with one unit, the drivers would start to 'loose control' and start bottoming out when pushed even moderately hard. The other one was more robust. I've been pretty busy and just sort of ignored it. However last night I thought.....something has to be wrong w/ the wiring. I traced everything in the H-frame. All ok. Then I looked at the wiring harness. I had mistakenly ordered the dual harness, which I really didn't need. Just for the heck of it, I switched the servo leads from one set to the other.....an viola!. Now the drivers were locked into proper control. So apparently, I had no servo control before. The VC was driven by one side of the harness, and the servo was connected to the other.

While I've actually been preety pleased all along, now I'm realizing why this setup is truly something special.

So yes it's a sordid tale, but I hope it helps someone out there!

[Guy 13]

Ok this is starting to get embarrasing, but I'll fess up in the hopes it can save another servo sub builder some grief. As I've posted previously when I finally built H-frames (orginally had all the drivers in big flat baffles and firing forward) I originally just wired everything in a parallel manner. Sounded pretty good, but I wasn't getting the slam everyone was claiming. So after a post, Danny provided the wiring diagram for the V1. The parallel arrangement, especially for the servo coil was of course way wrong. So w/ a fix, a big improvement. (I know others have at least made this mistake)

However I noticed with one unit, the drivers would start to 'loose control' and start bottoming out when pushed even moderately hard. The other one was more robust. I've been pretty busy and just sort of ignored it. However last night I thought.....something has to be wrong w/ the wiring. I traced everything in the H-frame. All ok. Then I looked at the wiring harness. I had mistakenly ordered the dual harness, which I really didn't need. Just for the heck of it, I switched the servo leads from one set to the other.....an viola!. Now the drivers were locked into proper control. So apparently, I had no servo control before. The VC was driven by one side of the harness, and the servo was connected to the other.

While I've actually been preety pleased all along, now I'm realizing why this setup is truly something special.

So yes it's a sordid tale, but I hope it helps someone out there!

Hi DR,
I also had a servo/driver wiring problem.
I had the wrong polarity on both servo coils and if that's was not enough, even the polarity of one driver's coil was in reverst. No need to say that I had the same amount of bass as a built in laptop speakers.
After I have carefully re-checked all the wires according to Danny's diagram and made the proper changes... BOUF, the same amount of bass as in a discotech, but with much mroe quality.
Conclusion. Check and re-check every single wire before you fill your hears with plenty of natural decibels...
Guy 13.

[drphoto]

The night I finally got the wiring correct, a brick building on my block collapsed. I'm not kidding....I can provide a link to the news report. Coincidence???

All joking aside, these things sound great. Not only has the bass gotten tighter, punchier....everything sounds better. Even the imaging. Probably this is because I'm using these more as woofers than true subs. I'm running them up quite high.....around 100hz or so.

These subs are killer and an amazing bargain. The H frames are relatively easy to build even for a klutz like me. You don't need to have a workshop full of tools to pull it off. I put up a post about that.

But once again, pay attention to the wiring. If you're not sure, Danny has an easy to follow diagram. If you have the dual wiring harness, make sure you have the VC and servo wires connected on the SAME side of the harness!

Thanks Danny for a great product that sounds great and is still affordable.