Upgrading Genesis II's

Vin_wang

New Member
Sep 18, 2021
10
1
3
47
Melbourne Australia
Hi Gary
This is my first post here, i have just acquired a pair of Genesis g2, it seems potentiometer on the one of the mid and hi tower crossover is not working. I just wondering if you know the replacement parts number for this.
Please refer to the attached photo as circled.
Sorry I borrowed Mak's photo posted here.
Many thanks in advance for your time.
Vincent
 

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Ron Resnick

Site Co-Owner, Administrator
Jan 25, 2015
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Beverly Hills, CA
Hi Gary
This is my first post here, i have just acquired a pair of Genesis g2, it seems potentiometer on the one of the mid and hi tower crossover is not working. I just wondering if you know the replacement parts number for this.
Please refer to the attached photo as circled.
Sorry I borrowed Mak's photo posted here.
Many thanks in advance for your time.
Vincent

Welcome to WBF, Vincent!

Congratulations on your purchase!
 

racerxnet

Well-Known Member
Apr 30, 2014
66
13
138
Hi Gary
This is my first post here, i have just acquired a pair of Genesis g2, it seems potentiometer on the one of the mid and hi tower crossover is not working. I just wondering if you know the replacement parts number for this.
Please refer to the attached photo as circled.
Sorry I borrowed Mak's photo posted here.
Many thanks in advance for your time.
Vincent
Hi Vincent,

I can see if I have a picture of the cables while being made. If you have no experience with schematics and electronics you might be better served having someone make a set. Pretty easy with the parts listed and soldering. It does make a big difference in the timing and output of the music after comparing the 2 set ups. The cables are wrapped with shrink tubing and I do not want to cut it open to show what was done.

I suggest you go to Audio science review and ask others there to help provide the information you want. I only come to this site because of the Genesis forum.

If I made another set I would use a small piece of breadboard to hold the wires and resisters in place.

The G2 bass columns are difficult to blend with the panels and I suggest you learn how to use REW with the Umik1 to measure the room response, correct phase and other aspects of reproduction. The biggest impact you will get after your purchase will be the room itself and DSP. Look into Audiolense or Accourate for making filters. If that does not appeal to you, contact Mitch Barnett.

I may have a couple of the potentiometers in a box somewhere. They are marked with the value on the body if not mistaken and manufacture.

MAK
 
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racerxnet

Well-Known Member
Apr 30, 2014
66
13
138
What are the dimensions of your room and any treatments you might employ ? The panels seem to work best when pulled out from the back wall. I added rock-wool absorption panels at the reflection points and front/back walls. I started with REW and RePhase for correction. The results were worth the time invested.

One of the things you won't see is that moving the panels and bass columns without measurement, is the room response and how it affects the performance. Here is an example.

Left_and_right_channels.jpg
I moved the panels and columns around over 25 times looking for the smoothest response I could get. Then fine tuning the correction file to suit my taste. I only correct in the 16Hz to 500Hz window. This is where the room controls the response. Above 500Hz and the speakers control the response. You get the bass response correct and the results are phenomenal. My present room is not the greatest, but it is way better after some effort to correct the room modes. With the High pass cables feeding the servo amp make sure you are not digitally clipping the signal at peak.

My wife and I are now building a new home and I will be constructing a dedicated room for my system. I will employ DRC once again, and hope the room modes are at a minimum before correction. Anyone who may be in the Huntsville area can stop in and listen after completion in May of 2022. Bring your golf game along also. We are on the 5th hole of beautiful Cherokee Ridge golf community.

MAK
 
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garylkoh

WBF Technical Expert (Speakers & Audio Equipment)
Sep 6, 2010
5,547
154
540
Seattle, WA
www.genesisloudspeakers.com
Hi Vincent, looks like you already got a few responses. I was busy at the Capital Audiofest, and this week visiting dealers, customers and partners.

The potentiometer would be a 1 ohm wire-wound pot. Not sure of the part number as the G-II was built nearly 30 years ago. Even if I knew the part number, it would likely be obsolete. Any 5W 1ohm wire-wound pot would be a substitute.
 

Vin_wang

New Member
Sep 18, 2021
10
1
3
47
Melbourne Australia
Thanks Mak for sharing the information.
My current room is not ideal, a little bit too small for G2 4.5m by 5.6m. The rooms got some treatment with some basstrap and sound diffuser on the reflection point. I haven't had room correction software run through but will look into to improve the sound. As my audiophile journey are still relatively short and I am eager to learn from all experienced members here. Any helpful advices will be greatly appreciated.
As I am living down under in Australia, it is a bit harder for us to get proper information and also support, so once again, many thanks for your input in this fourm. I have learned a great deal about G2 from you.
Vincent
 

racerxnet

Well-Known Member
Apr 30, 2014
66
13
138
Here is a picture of the replacement pots I bought off of Ebay. They are not the correct value, but the same as ones I soldered on the board.

Genesis pots.jpeg


I wanted to keep the original parts and fitment to the PCB board so there were no modifications. Remove the back cover and take a picture of the stamping to see the value on your pot. I cannot find the pictures from the rebuild, but you now know they are Violet pots. You should be able to figure it out from there.

MAK
 
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Vin_wang

New Member
Sep 18, 2021
10
1
3
47
Melbourne Australia
That is great, it is look same as the one in my crossover, I couldn't found out my because my one is a bit rusty and can not see which model. My speaker is made on 1996, by opening the crossover, it is look slightly different from your crossover photo posted here. I will order the pot today if I can.
Regards
Vincent
 

lexа

Member
Apr 19, 2020
2
0
6
57
Я бы не рекомендовал заменять Rel-Caps. Если верхняя часть скатана, более вероятно, что вам нужно заменить твитеры и / или горшок твитера. Пленочные шапки не подведут. Обычно может потребоваться замена биполярных электролитов.
Hello!
I have a question for knowledgeable people
Could you please tell me where on the photo are the bipolar electrolytes photo 1 and whether they sell separately the film membranes for the tweeter photo 2
Excuse my far from perfect english
Regards
Lex
 

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Addicted to hifi

VIP/Donor
Sep 8, 2020
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That is great, it is look same as the one in my crossover, I couldn't found out my because my one is a bit rusty and can not see which model. My speaker is made on 1996, by opening the crossover, it is look slightly different from your crossover photo posted here. I will order the pot today if I can.
Regards
Vincent
Welcome vin wang to wbf.
 

garylkoh

WBF Technical Expert (Speakers & Audio Equipment)
Sep 6, 2010
5,547
154
540
Seattle, WA
www.genesisloudspeakers.com
Hello!
I have a question for knowledgeable people
Could you please tell me where on the photo are the bipolar electrolytes photo 1 and whether they sell separately the film membranes for the tweeter photo 2
Excuse my far from perfect english
Regards
Lex
The blue and the black ones are bipolar electrolytic capacitors. The yellow and white "Genesis" branded ones are film.

The new tweeter is sold as a complete unit. We have never sold the diaphragms. I understand that the old company used to sell the diaphragms to repair centers.
 

Vin_wang

New Member
Sep 18, 2021
10
1
3
47
Melbourne Australia
i went today to my friends house to listen to genesis 200 4 panel’s speakers.these are 25 years old but still sound excellent.
I have got my g2 a little bit over a week now, to be honest, the speakers have not been properly setup and it still sound great and it sound much better than my previous speakers. G2 got so much potential once it properly setup. My room is not ideal, but G2 should work OK in my room.
 
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Addicted to hifi

VIP/Donor
Sep 8, 2020
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I have got my g2 a little bit over a week now, to be honest, the speakers have not been properly setup and it still sound great and it sound much better than my previous speakers. G2 got so much potential once it properly setup. My room is not ideal, but G2 should work OK in my room.
That’s great news.yes they take a while to get the best spot for them.this guy only got his 3 days ago as well.amazing speakers.
 

Addicted to hifi

VIP/Donor
Sep 8, 2020
4,614
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Australia
I have got my g2 a little bit over a week now, to be honest, the speakers have not been properly setup and it still sound great and it sound much better than my previous speakers. G2 got so much potential once it properly setup. My room is not ideal, but G2 should work OK in my room.
Good idea to add some feet or spikes on the speakers as they just sit on the floor.a concrete slab would work well Especially under the bass towers.
 

lexа

Member
Apr 19, 2020
2
0
6
57
The blue and the black ones are bipolar electrolytic capacitors. The yellow and white "Genesis" branded ones are film.

The new tweeter is sold as a complete unit. We have never sold the diaphragms. I understand that the old company used to sell the diaphragms to repair centers.
Hello!
Thank you very much for the answer
I bought the G2 recently and how do you think i have the original bipolar electrolytic capacitors or not ?
 

garylkoh

WBF Technical Expert (Speakers & Audio Equipment)
Sep 6, 2010
5,547
154
540
Seattle, WA
www.genesisloudspeakers.com
Hello!
Thank you very much for the answer
I bought the G2 recently and how do you think i have the original bipolar electrolytic capacitors or not ?
They look original. Hence, after 25 years, it might be beneficial to change them. But there is danger.

Many of the older speakers have had the original midrange ribbons replaced with ribbons purchased off the Internet. These B&G 48-inch ribbons for the DIY market (and their own speakers) are designed to be used from 250Hz to16kHz. The Genesis II (with the Carver ribbon) and newer Genesis with the OEM Genesis ribbons by B&G are designed for 150Hz up.

As capacitors age, their capacitance goes down. Since these electrolytic capacitors are in the high-pass of midrange crossover, as they age, the high pass goes up from the original specification of 150Hz. With older capacitors, the crossover works with these ribbons.

Hence the danger here. If you change the capacitors to what they should be, lower frequencies will be sent to the midrange ribbon. If they are the DIY B&G midranges, or the midranges have aged and weakened, sending lower frequencies to them may cause them to fail.
 
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