PSA: My EP600 V3 started making a rattling type sound .

I troubleshot it it down to the surround rattling against the basket. It was just a small spot not attached properly but when I tried to find the end of the failure it grew. My opinion is there was minimal adhesive used, or the adhesive failed. I am going to reglue the entire surround to basket. The sound got much worse after I pulled on the surround and grew the defect. the end of the video shows the original defect sound.

You really couldnt hear it if the fronts were running also, But when just on the sub, it was a noticeable clicking type sound. I thought the amp or speaker was bad. I've already had two amps fail in my orignal EP500. To be fair, that was over a 15 year timeframe and I left them on all the time

pic of defect
https://nextcloud.perkosolutions.com/index.php/s/b756CMCB5trAcWQ

video of defect
https://nextcloud.perkosolutions.com/index.php/s/mmPtdPBArsKHopz

anatomy of a speaker
https://blog-api.landr.com/wp-content/uploads/2017/07/parts_of_aspeaker-1200x627.jpg

Adhesive I have ordered but have not used yet
https://www.amazon.com/dp/B00L8A9YTO

The EP600 was purchased used so I dont know the entire history.
I am running on an external amp just to one of the voice coils. I didnt matter which one for this defect
Using a Harrison Labs 70 hz low pass filter to protect the sub in my test setup. It is the gold thing in the video
The ART SLA4 amp was bridged and rated 280 watts/Ch @ 8 ohms (bridged). I read somewhere the axiom sub is very low ohms ( 1 or 2??) but this wasnt a power issue. it was a mechanical issue

Side Note. I found it interesting when using the 'high level' inputs to the axiom amp, the amp still needed turned on. my guess is the high level signals are converted to line level then processed thru the internal amp. All good till the amps caps give out.

Title states EP500/600 because the same part is listed as a replacement on the website

That's happened to me and rrlev. The adhesive you ordered is for foam surrounds and I very much doubt it will hold.

I think each voice coil is 2 Ohms. So the sub needs 20+ Amps of current for rated power and closer to 40 for peak power. Hence the conversion from high level.

Interesting there's no dust cap. I like that clean look.

Nice troubleshooting!

Thanks for the reply.

I read mixed things about whether that adhesive was correct. The description states "Use for attaching speaker surrounds to paper, poly, metal, and composite cones. Spiders to frame, surrounds to basket, dust caps to cone. " I can cancel this tonight as shipping is a week out. Amazon is slipping.

What did you use for adhesive ?

I never noticed the non existent dust cap. It appears axiom made them that way for awhile
https://www.axiomaudio.com/pub/media/photogallery/images/lrg/EP500CherryNutmegSemi.jpg
As I purchased this EP600 used, anything could have happened. I considered the subwoofer original because it has absolutely no markings on it

The info about the high level conversion makes sense. I had wrongly thought 'if the amp fails I can just use an external one and the high level inputs ' .

Really appreciate you mentioning I am not the only one.

I recommend you cancel and try to contact Axiom about a recommendation.

My sub was on warranty so Axiom sent me a new driver pronto.

Thanks . I may try to call tomorrow . My commumications experiences have been mixed since 2021. Probably covid related . I will say that in the end they have always bent over backwards to take care of me.

In the meantime I ordered something different

I cancelled this one. ( sorry cant edit original post )


and ordered some ruberrized CA
https://www.amazon.com/dp/B002N4WCR0

I tried some electrical tape in the interim and it didnt work :-)

I don't know how well that would bond to the steel basket.

Maybe gorilla tape. I use it to hold my 43 year-old van together.

I'll try to gorilla tape my HP driver that ripped on a 125,000 Watt bass drum hit.

We'll see . Maybe I will get some info tomorrow. Axiom may just suggest I purchase a replacement, which makes sense. Otherwise it will be about a week till I know. Don't run the stereo all day but do miss the sub already , especially on my day off.

That's a hell of a bass hit I like old vehicles but for a daily driver cant beat anti-lock brakes, air bags, and front wheel drive. But if I could drive a 1980 cutlass supreme every day

Don't think any tape will work on this because it is the underside of the surround that needs to be attached to the basket. the electrical tape I put on held for the brief time it was on there. but the underside of the surround still vibrated against the basket. Maybe some type of double sided tape but there is still the issue of running the tape in a circle. Prolly not.

Prolly just try the adhesive and if it doesn't work , buy the replacement.

Really was relieved it wasn't the amp.

This looks more like the work of Mojo’s speaker test and durability kit …

Speaker driver torture kit.



Speaker cabinet torture implement.

Is subwoofer failure the norm?

I've only owned one sub (a 28 year old Mirage bought brand new), and I've nursed it for the last 5 years with judicious use of contact cleaner. I thought last November was the death knell, but somehow it stopped squealing after my 9th or 10th dose. Even the foam surround is intact, and sounds like the day I bought it.

I've seen various forum posters mention their sub failures, but I've been under the impression that it's because they use switching power supplies or were abused.

Failure is the norm if it is poorly designed. If you understand the stresses your components will be subjected to, you can design for those stresses. Component screening to ensure design specs are met for critical components is also something that really helps.

So the adhesive wont be hear till the weekend.

Called axiom yesterday afternoon, got voicemail, and left a message with my phone number, email, and seriai number of sub-woofer. Even mentioned this post. Heard nothing 24 hrs later.

All this is just conjecture as I am expecting the adhesive to work.

Investigated purchasing an aftermarket woofer in case a replacement becomes necessary. Yes I realize the DSP wont be tuned to it. I haven't seen anywhere axiom provides the FS,QTS, etc of their sub-woofer. I'm gonna say my room placement isn't that good anyway. Best match I found was Alpine R2-W12D2 .

The price is slightly lower than the OEM but I'm sorry to say my confidence is low in my belief that axiom will be able to deliver a replacement in a timely manner. My rule of thumb is , if you aren't available before the sale, you probably wont be available after the sale. Sadly this wasn't always the case with axiom.

The issue is the axiom sub's frame isn't exactly round. Unless anyone knows of a sub with a frame cutout like this , it would be required to cut the frame of the aftermarket sub-woofer. Keeping the metal shavings off the magnet and away from the speaker will be an issue. A secondary, smaller issue is the bolt holes might not line up but the old nuts could be removed and reused, additional holes drilled in the cabinet to match the hole pattern of the new woofer.

ok finally figured out how to embed nextcloud images on here :-)

If the adhesive doesn't work, this is the woofer you need.

https://www.axiomaudio.com/ep500-600-800-woofer

Thanks for the link. I may consider that item but would have to speak with axiom first.

I have a long story about ordering a m22 crossover from that section of the website. I believe I had V2 SI .you notice there are no revision numbers with these parts. My original crossover was attached to the speaker connection sub assembly and what they shipped was an external board with no instructions. I couldn't make heads or tails of it . In the end axiom paid for shipping both ways and apparently installed this add on board. i never opened them back up when they were returned. I traded them in when I upgraded to M80.

So my experience is speak to axiom before ordering any replacement parts.

That's definitely a good idea, Jim. I am quite sure though all the speaker drivers are backwards-compatible.

Looks more like a Mojo mod to the Nimbus 2000 to help riders stay on their brooms

https://youtu.be/EtqOiKUcT_Q

Instead of a broomstick, Harry needed a boomstick.

Well … if it were a flying broomstick mod … I’d just advise riders not to sit upright too quickly
As a war club … is there a particular event I need to avoid?

It feels fine between the crotch when the leather sheath is on the bladed point.

Interestingly enough, the injection molded high impact polypropylene is an amazing material. I've beat mine up and there's nary a scratch. The color and grain is terrific and so are the aesthetics and weight. I was thinking it could be a very good material for speaker cabinets.

Only guy I know who is so into clubs and knives. As far as speaker cabinets… that kind of material (at least from observation) seems to be employed in pro environments where a speaker needs to stand up to a bit of abuse … like road bands which are constantly setting up and taking down.

And spears, swords, axes, and assorted other primitive implements. Been that way since grade 6 when I worked on a school project.

I would think once the cast is made, the poly would be a much cheaper and more available cabinet material than MDF. I don't know if it would be accepted by the market.

This adhesive worked . It didnt set up too fast.

Sweet! Nice job, Jim.

To keep things balanced. Axiom returned my call from several weeks ago, apologizing for some type of voicemail issue . I told them that the issue was resolved with glue.