411-8A replace by 421 Woofer

[arawak1969]

Afternoon all
Can the 421 woofer replace the old 411-8A?

The reason is that I have been trying to locate 411's and have not had any luck.
I have not been able to find info on the 421 to see if it can be used in a sealed enclosure such as the 9846.
If it cannot be used, what replacement(JBL or Altec) do you suggest and what should I expect to change.
Thanks,
Peter

[spkrman57]

Bill H at Great Plains can recone them.

421 is vented driver only. Also it does not have the LF extension of the 411.

Need more info to help out here.

Ron

[arawak1969]

Okay, here goes.
I found a pair of 9846's but they have a JBL 2225 woofers in excellent condition along with a 806 drivers on the 511 horns.
I do not have a an extra set of 411-8A's to put in them and was wondering if there was a modern woofer similar to the 411 that i could put into the sealed enclosure.
I am going to put the 2225's up for sale once I locate a replacement.
I can't think of what these will sound like with a vented woofer in a sealed enclosure.

[spkrman57]

How did the 2225's sound in them?

Ron

Okay, here goes.
I found a pair of 9846's but they have a JBL 2225 woofers in excellent condition along with a 806 drivers on the 511 horns.
I do not have a an extra set of 411-8A's to put in them and was wondering if there was a modern woofer similar to the 411 that i could put into the sealed enclosure.
I am going to put the 2225's up for sale once I locate a replacement.
I can't think of what these will sound like with a vented woofer in a sealed enclosure.

[arawak1969]

I guess my Dad was right. I never listen.

I got them in and immediately took the 2225's out so I can't even tell.

[spkrman57]

Install the 2225's in them and listen and report back if you would please.

I had JBL 2205's some time ago that worked well in 6 cu ft sealed cabinet.

You never know, and it depends on the type of sound you are looking for if they would work out for you or not.

Costs nothing but time to find out!

Regards, Ron

[arawak1969]

Install the 2225's in them and listen and report back if you would please.

I had JBL 2205's some time ago that worked well in 6 cu ft sealed cabinet.

You never know, and it depends on the type of sound you are looking for if they would work out for you or not.

Costs nothing but time to find out!

Regards, Ron

I did the swap and was very disappointed.
Not anywhere as flat sounding as the 411-8A's.

I have them up for sale and am looking for another pair of 411-8A's.

Anyone got any they wanna part with out there?
Peter

[GordonW]

The closest JBL woofer to a 411, is the 2235H or 136A/2231A. It may still not match sufficiently well for your taste in the mids (then again, it may)... but it's the closest thing, in construction, that JBL ever made to a 411...

Regards,
Gordon.

[Zilch]

Recone those 2225s to 2234s. Try that.

Not enough bass? Install the mass rings and make them 2235s....

[Earl K]

- I've always wondered what the "mms" is for this woofer ( 411-8a ) .

- Does anyone know or have a sample ( plus Woofer Tester ) that could be measured ?

- And while we're at it, does anyone know the BL figure for the 411 ?
( Altec was really miserly when it came to releasing these sort of technical details )

[scott fitlin]

I have an Altec looseleaf at home with the spec sheet for the 411, but not sure it has that much detailed info on specs. I`ll look when I get home.

That woofer has a super compliant suspension, and goes down really low, medium efficiency, designed for sealed enclosures, I think.

The 421 series is not a replacement for that woofer. The closest thing I could think of, which has already been said, is the JBL 2235.

[yggdrasil]

Cannot remember where I got these, but...

[grumpy]

probably here :

http://alteclansingunofficial.nlenet...ers/lflit.html

[scott fitlin]

Thats the same literature Johnny posted, which is what I have.

I found it, here are the TS specs for Altec woofers! But not every spec, no mms or bl.

http://alteclansingunofficial.nlenet...ele-Small.html

[Earl K]

Thanks guys , but ;

- I'm still wondering about mms & BL .
- Altec,,, to the best of my knowledge never published those figures.

- Also, does this woofer use an overhung or underhung voicecoil ?
- And last, but not least; what's the depth of the gap ( top-plate ) ?