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jan_slagman
08-14-2008, 01:45 AM
Hello friends,

Someone on Dutch Marketplace offers a pair of 4412 Monitors, but when inquiring after the technical condition seller told me he replaced the woofers for a pair of woofers from a 4412A Monitor.
He stated the bass gives more punch now. As far as i am informed the 4412 and 4412a have different networks (and a different mid-high combo).
Does anyone of you know if this alteration can be done without any consequences.

With kind regards,

Jan Slagman
The Netherlands

pos
08-14-2008, 03:00 AM
The woofers are the same: 128H-1

http://www.jblproservice.com/pdf/Studio%20Monitor%20Series/4412LR.pdf
http://www.jblproservice.com/pdf/Studio%20Monitor%20Series/4412ALR.pdf

BMWCCA
08-14-2008, 08:12 AM
Maybe you meant 4312? Just guessing here.

jan_slagman
08-14-2008, 09:12 AM
Maybe you meant 4312? Just guessing here.

Hi BMWCCA,

No, i mean the woofer of a JBL 4412 and the woofer of a JBL 4412a.

Kind regards,

Jan Slagman
The Netherlands

jan_slagman
08-14-2008, 09:17 AM
Hi Pos,

Yes indeed you're right. I thought the difference was a 128H and 128H/1.
Thanks !

Kind regards,

Jan Slagman
The Netherlands.

BMWCCA
08-14-2008, 09:27 AM
No, i mean the woofer of a JBL 4412 and the woofer of a JBL 4412a.So then, what DO you suppose the seller was referring to??

jan_slagman
08-14-2008, 11:42 AM
So then, what DO you suppose the seller was referring to??

Hi BMWCCA,

I think i need a new pair of specs ! Yes indeed both monitors have the same woofer.

Kind regards,

Jan Slagman
The Netherlands.

BMWCCA
08-14-2008, 12:12 PM
I think i need a new pair of specs ! Yes indeed both monitors have the same woofer. So your new glasses would give you that improved "punch"? I don't think it's you; the seller sounds confused.

boputnam
08-14-2008, 12:22 PM
Giskard long-ago pointed us here:


Here's a little matrix available from the JBL (http://www.jblproservice.com/pdf/Systems%20Reference%20Charts/Studio%20Monitor%20Series.pdf) site... Since Links sometimes don't survive Quotes, here's the link he refers to: Systems Reference Charts - Studio Monitor Series (http://www.jblproservice.com/pdf/Systems%20Reference%20Charts/Studio%20Monitor%20Series.pdf)

jan_slagman
08-14-2008, 12:52 PM
Thanks for your input guys. What would i be without you're knowledge and your kindness to help me once again (and yes believe me my improved specs will detect every JBL collector's item )!!! By the way, i already own a pair of JBL 4312A Monitors. How do the JBL 4412 Monitors sound compared to the JBL 4312A Monitors ?. It is said the 128H1 is one of the better woofers JBL ever produced. Do these woofers have the same specifications as the white 128H's used in the JBL L 112's. At this moment i also have an option to sell a pair of JBL L 112's. Only the woofers need to be refoamed. Is there a big difference in sound between the JBL 112's and the JBL 4412's ?.

Kind regards,

Jan Slagman
The Netherlands

Fred Sanford
08-14-2008, 04:58 PM
So your new glasses would give you that improved "punch"? I don't think it's you; the seller sounds confused.

He probably had the original woofs wired out of phase with each other, and thought they were weak. Replaced them, and wired them correctly: :applaud:wow, the bass is MUCH better now!

je

BMWCCA
08-14-2008, 05:37 PM
How do the JBL 4412 Monitors sound compared to the JBL 4312A Monitors ?. It is said the 128H1 is one of the better woofers JBL ever produced. Do these woofers have the same specifications as the white 128H's used in the JBL L 112's. At this moment i also have an option to sell a pair of JBL L 112's. Only the woofers need to be refoamed. Is there a big difference in sound between the JBL 112's and the JBL 4412's ?. Objective: Every publication from JBL says the 128H-1 is an exact acoustic replacement for the 128H.

Subjective: In my humble opinion, crossovers and box-size not withstanding, the bottom end of the L112 and the 4412A perform fairly similarly and both are affected by barrier placement and height off the floor. The main difference seems to be the tweeters where the "aluminized" 044 is "softer" in that it seems to mask harsh high-end raspyness in some recordings where the titanium 052ti will perfectly reproduce any harshness in the recording. That's the difference I've noticed and it obviously makes some recordings easier to listen to longer on the L112 than on the 4412A, though it doesn't make one better than the other except maybe the 4412A is more accurate and can be tamed, if needed, with EQ. The L112, on the other hand, with it's wood veneer, white cone, and aluminum 044, is a prettier speaker, FWIW!

I can't compare the 052ti to your 035ti since I only have the 035tiA and I haven't heard a 4312A. My guess would be between the 4312A and the 4412A is that the 128H-1 would provide better bass, but I've not compared them. I'm sure someone has, so I'll shut up.

As for 12" woofers, the 128H/H-1 is a fine speaker. My recent experience suggests the LE120H-1 has it beat, at least in the four-way L7.

jan_slagman
08-15-2008, 01:55 AM
Hi BMWCCA,

Thanks a lot for your detailed information. By the way, didn't the JBL L-112 have a 044 tweeter instead of a 077 ?

Kind regards,

Jan Slagman
The Netherlands.

BMWCCA
08-15-2008, 03:56 AM
Hi BMWCCA,

Thanks a lot for your detailed information. By the way, didn't the JBL L-112 have a 044 tweeter instead of a 077 ?Wow, bad slip but good catch. I'll edit it for posterity. Must be prism envy! :)

Zilch
08-15-2008, 12:04 PM
So your new glasses would give you that improved "punch"? I don't think it's you; the seller sounds confused.I'm certain they have more punch than the ones with rotted surrounds he replaced.

[You want the original woofs too, of course.... ;) ]

brutal
08-15-2008, 12:17 PM
Objective: Every publication from JBL says the 128H-1 is an exact acoustic replacement for the 128H.

Subjective: In my humble opinion, crossovers and box-size not withstanding, the bottom end of the L112 and the 4412A perform fairly similarly and both are affected by barrier placement and height off the floor. The main difference seems to be the tweeters where the "aluminized" 044 is "softer" in that it seems to mask harsh high-end raspyness in some recordings where the titanium 052ti will perfectly reproduce any harshness in the recording. That's the difference I've noticed and it obviously makes some recordings easier to listen to longer on the L112 than on the 4412A, though it doesn't make one better than the other except maybe the 4412A is more accurate and can be tamed, if needed, with EQ. The L112, on the other hand, with it's wood veneer, white cone, and aluminum 044, is a prettier speaker, FWIW!

I can't compare the 052ti to your 035ti since I only have the 035tiA and I haven't heard a 4312A. My guess would be between the 4312A and the 4412A is that the 128H-1 would provide better bass, but I've not compared them. I'm sure someone has, so I'll shut up.

As for 12" woofers, the 128H/H-1 is a fine speaker. My recent experience suggests the LE120H-1 has it beat, at least in the four-way L7.

In a Comparison between my L112 and my 4312BMkII, the 128H still hits much harder than the 2213H. I think the saturated paper surround v.s. foam has its limits in that regard. The 035Tia or 052Ti certainly tops the 044 in upper end clarity, the difference between the LE5-12 vs 104H is fairly hard to distinguish for these old ears.

jan_slagman
08-15-2008, 04:46 PM
In a Comparison between my L112 and my 4312BMkII, the 128H still hits much harder than the 2213H. I think the saturated paper surround v.s. foam has its limits in that regard. The 035Tia or 052Ti certainly tops the 044 in upper end clarity, the difference between the LE5-12 vs 104H is fairly hard to distinguish for these old ears.

Thanks Brutal,

I really appreciate your input. As mentioned before i already have a pair of JBL 4312A's and i always wondered how the same mid/high combo would sound with a JBL 128H1 woofer.

Kind regards,

Jan Slagman
The Netherlands

jan_slagman
08-15-2008, 04:49 PM
I'm certain they have more punch than the ones with rotted surrounds he replaced.

[You want the original woofs too, of course.... ;) ]

Hi Zilch,

You're quiete right !!!! :D

Take care,

Jan Slagman
The Netherlands.