Hivi 3.1A DIY Speaker With Sehlin Mod Review

[maltux]

Hi folks,
I know this is a Hivi 3.1 thread, but I couldn't find any recent ones related to 2.2A so I'm hoping to get some answers here.

I've had the 2.2a's for about 3 years now and I love them, but after a recent move one of the woofers is not working any more. Tweeter works normally but no sound from woofer. I opened the cabinet, disconnected the woofer, and tested the Resistance with a multimeter, which was 6.5 ohm. It's not that far from the rated 8ohm so seems ok. I tested the other connections on the PCB and they all seemed fine. Capacitors were harder to test, but I took them out, drained them and tested the resistance and it seemed to move/charge so not sure. It's not the cable or my receiver, I've cross-tested those.

Any ideas/feedback would be greatly appreciated. Thanks

I have included the link for the replacement woofer from Parts Express.

Home

HiVi D6.8B 6" Poly Bass/Midrange ShieldedThe HiVi D6.8B's design positions the voice coil over an undercut central pole piece with a large thermally stabilized Neodymium magnet at the bottom. A specially shaped, CNC machined steel cup completes the magnetic structure from the outside, creating a...

www.parts-express.com

 

[dr_mick51]

Hi folks,
I know this is a Hivi 3.1 thread, but I couldn't find any recent ones related to 2.2A so I'm hoping to get some answers here.

I've had the 2.2a's for about 3 years now and I love them, but after a recent move one of the woofers is not working any more. Tweeter works normally but no sound from woofer. I opened the cabinet, disconnected the woofer, and tested the Resistance with a multimeter, which was 6.5 ohm. It's not that far from the rated 8ohm so seems ok. I tested the other connections on the PCB and they all seemed fine. Capacitors were harder to test, but I took them out, drained them and tested the resistance and it seemed to move/charge so not sure. It's not the cable or my receiver, I've cross-tested those.

Any ideas/feedback would be greatly appreciated. Thanks

Use the woofer from the other(good) speaker. If the woofer still does not work then it's a crossover problem. If the woofer works fine, then it is the woofer which is bad.
I believe it's a crossover issue because you mentioned the woofer coil is not broken(has DC resistance).
The crossover on the DIY2.2 has one coil, one cap and one resistor for the woofer. Check those, maybe reflow the solder points.

 

[Mudjock]

I've had a few people report similar issues to yours with the DIY 3.1 kit. In at least one case, the issue was the circuit board and the solution was to direct wire the crossover components together rather than using the stock board. I agree with the previous post that if you have a normal dc resistance across the woofer terminals, you should get sound.

Swapping woofers between the two speakers is a good suggestion to see if the problem follows the woofer or not. The other thing you could do is check the resistance between the positive amplifier connection on the circuit board and the connection that goes to the positive woofer terminal. Your DC resistance there should not be much more than an ohm or two (and much of that will likely be due to your multimeter test leads).

 

[dr_mick51]

I've had a few people report similar issues to yours with the DIY 3.1 kit. In at least one case, the issue was the circuit board and the solution was to direct wire the crossover components together rather than using the stock board. I agree with the previous post that if you have a normal dc resistance across the woofer terminals, you should get sound.

Swapping woofers between the two speakers is a good suggestion to see if the problem follows the woofer or not. The other thing you could do is check the resistance between the positive amplifier connection on the circuit board and the connection that goes to the positive woofer terminal. Your DC resistance there should not be much more than an ohm or two (and much of that will likely be due to your multimeter test leads).

@stallhagen Right. And also measure for continuity between the negative input on the board and the end connector or bare wire on the negative output to the woofer. It could be a bad solder on the woofer wires or the wires themselves.

 

[dr_mick51]

The DIY2.2 are now at $168 on Amazon

https://a.co/d/7Se0d8V

The drivers alone are worth $250 on parts express

 

[maltux]

The DIY2.2 are now at $168 on Amazon

https://a.co/d/7Se0d8V

The drivers alone are worth $250 on parts express

Thanks. Great deal. Purchased another pair. These are great kits.

 

[maltux]

Hi folks,
I know this is a Hivi 3.1 thread, but I couldn't find any recent ones related to 2.2A so I'm hoping to get some answers here.

I've had the 2.2a's for about 3 years now and I love them, but after a recent move one of the woofers is not working any more. Tweeter works normally but no sound from woofer. I opened the cabinet, disconnected the woofer, and tested the Resistance with a multimeter, which was 6.5 ohm. It's not that far from the rated 8ohm so seems ok. I tested the other connections on the PCB and they all seemed fine. Capacitors were harder to test, but I took them out, drained them and tested the resistance and it seemed to move/charge so not sure. It's not the cable or my receiver, I've cross-tested those.

Any ideas/feedback would be greatly appreciated. Thanks

Did you ever correct the problem? Curious minds want to know.

 

[maltux]

My second pair...... I call them my cherry bombs! I am over the moon with their sound. Oh, no tube connectors

 

[motomech]

Hivi 3.1 diy is now on sale on Amazon for $240.

 

[DrexelLake]

Purchased after reading this. Tested the crossovers with the perfectionist mod. Everything works, though the tweeters seem a little week. I'm hoping that's because they are out of the cabinet. Waiting on walnut veneer before putting everything together. Great thread. Thanks for the detailed info.

 

[Mudjock]

The crossover between the mid and tweeter is at 5.5 kHz, so there isn't a lot of sound going through the tweeter, but with any luck things will balance out in cabinet with the midrange taking its share of the high frequency info.

 

[DrexelLake]

The crossover between the mid and tweeter is at 5.5 kHz, so there isn't a lot of sound going through the tweeter, but with any luck things will balance out in cabinet with the midrange taking its share of the high frequency info.

That's what I was hoping. I also decided to not snap the crossover in place and make it easier to remove in case I want to change or repair it in the future. Bought some nylon screws to run through a short piece of rubber tubing to screw into the anchors.

 

[DrexelLake]

I finally finished them. They sound incredible. My Klipsch RP-600M II's are for sale now. LOL

 

[DrexelLake]

So what are the specs after the mod? Are they still as original? Mine sure seem to go lower than 40Hz. My wife agrees.

Frequency Range	40Hz - 20kHz
Harmonic Distortion	51Hz - 20kHz ≤1%(2.83V/1m)
Sensitivity（2.83V/1m）	88dB
Nominal Impedance	4Ω
Power Handling	10W - 120W

 

[dmcs414]

Recently picked up a pair of these along with (most) of the components for Perfectionists mod, but I noticed that Parts Express is back ordered on this part, is anyone aware of a replacement that can be used either from them or another vendor and still complete the mod? Thanks!

DNR-5.6 5.6 Ohm 10W Precision Audio Grade Resistor​

 

[rvsixer]

Recently picked up a pair of these along with (most) of the components for Perfectionists mod, but I noticed that Parts Express is back ordered on this part, is anyone aware of a replacement that can be used either from them or another vendor and still complete the mod? Thanks!

DNR-5.6 5.6 Ohm 10W Precision Audio Grade Resistor​

PE part number(s) 004-4 in series with 004-1.5 would equal 5.5 ohm 10W 2%.
Even at full tolerance limits, you would only be 0.098 ohm off the 5.6 part tolerance limit. Only the goldenest of golden ears could pick the audio differences up .

 

[DrexelLake]

Recently picked up a pair of these along with (most) of the components for Perfectionists mod, but I noticed that Parts Express is back ordered on this part, is anyone aware of a replacement that can be used either from them or another vendor and still complete the mod? Thanks!

DNR-5.6 5.6 Ohm 10W Precision Audio Grade Resistor​

What about this. https://www.parts-express.com/Dayto...ion-1-Audio-Grade-Resistor-006-5.6?quantity=1

 

[rvsixer]

What about this. https://www.parts-express.com/Dayto...ion-1-Audio-Grade-Resistor-006-5.6?quantity=1

Even better !
As long your power rating and rating precision are better than what you are replacing (and inductance rating)...no problem.

 

[Mudjock]

Even better !
As long your power rating and rating precision are better than what you are replacing (and inductance rating)...no problem.

I agree with that suggestion. The DPR10-5.6 will work just fine.

 

[dmcs414]

Thank you all, I just purchased (2) of the DPR10-5.6