acoustical stuffing / sound dampening subwoofer cabinet REL BRITANNIA B1 subwoofer

Thanks for all the information from everyone! Sorry for my slow response. All great points and I do have  another quick question regarding replacement woofers I’d like to ask

AUXINPUT—You are correct, I did some more research and contacted other owners, took me a while, but you are right. There was no stuffing from the manufacturer. GREAT INFO on how to modify the cabinet. I appreciate it.

ERIKSQUIRES—Excellent point about the heat of the woofers. I have owned all the infinity intermezzo speakers including the 1.2s subs. They almost ALL had problems from heat build up exactly as you describe.

KINESIS & GEOFF—I agree with your experience. And you are right it’s the old “everyone is doing it”

QUESTION—I need a replacement 12” woofer for this large volume enclosure. I know the T/S parameters of the old driver which is helpful. I have been shopping and see a huge range of prices from $40-$1000. Seems like a suitable replacement is $400+ if I were to go with a home audio driver.

What I was wondering is what about CAR stereo woofers? I see a ton of 12” car stereo woofers that are extremely well built (sometimes better than home audio), have good parameters, and are at a lower price. The only downside is that they are DUAL VOICE COILS, DVC. I know a DVC would have to be wired in series thus taking 2 ohm to 4ohm for example. Is there any downside to a car audio woofer? Any downside to merely connecting the 2 voice coils?

 

Thanks for your thoughts!

Totally agreed on the VAS importance, I have a decent working knowledge of sub building, no expert by any means, and that is the most important. I am not the most critical listener, and as long as something is reasonably close, I am okay with that.

Just to clarify-- the port actually is quite long. the port begins at the top of the internal chamber and runs out the bottom. I would estimate 17-19" long (see pictures for reference)

https://drive.google.com/open?id=1FQ-rxf-sWajA2tD1gS5XOpz4cMjEEte1

https://drive.google.com/open?id=1KdVinNuzyvs0c-BNJD36bS3vSShmqRbO

https://drive.google.com/open?id=1PLkmGxLq5MZfn8MhOb7py6Al0KUrfPiO

Great advice, that was actually going to be my next step down the rabbit hole!! LOL

I that worth $129 versus some of the free software out there?

Thanks AUX-- I have narrowed it down to 2 options, I will look into that rythmik driver as well.

Thanks again!!

The two I am considering are:

The rhythmik and the AD12-300 from BKELEC in the U.K.

I ruled out an NHT 1259, simply too old, want to go with new.

The problem with the RHYTHMIK is that they are NOT selling the driver separately. They want you to buy the whole sub. It even states that on their website. So I wrote them to see if they will sell one separately. Waiting to hear back.

The problem with the BKELEX is that I had written them in the past, got no response. Gave it one more try last week, they actually responded, but have not sent me an invoice. Still waiting on that too!

Might need a 3rd option after all the hassle!

I'll check out all those, heard good things about eminence.

Let you know what I decide when I hear back from all the companies

How about this one?

https://www.parts-express.com/open-box-faitalpro-12hp1030-12-professional-woofer-8-ohm--294-1255