New Audio Blog Altec 604 DIy

[wally1966]

Welcome to my Audio Blog

audioimpresje.blogspot.com

Altec 604 open baffle and more ...

[GM]

Greets!

Read your excellent sand baffle article, but saw no place to comment like you offer on some others ; so yes, the goal is to either mass load it to resonate below the driver's passband or above it, which requires more stiffening and in your case presume it pushed the baffle's Fs sufficiently below the driver's Flc, whereas if a low Fs, best to make it rigid enough to resonate above its Fhm* passband.

* The box only loads the driver to its upper mass corner (Fhm) where T/S theory peters out:

upper: Fhm = 2*Fs/Qts'

lower: Flc = Fs*Qts'/2 (AFAIK only used for reactance annulled BLHs and mass loading the speaker)

Qts': 2*Fs/Fhm

Fs: Fhm*Qts'/2

BTW, who are you? I would like to bookmark it.

[LICORNE]

Wow you're still responding to that . Today people if they can afford it will get some A7
. The bass is reproduced by subwoofers .

[Phil-G]

is there an English translation?

[wally1966]

No, I write in Polish, but every browser can translate it

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I never had Altec 604 in box. Open baffle system is my only system.
What about me?
Lawyer. DIY-er. Listener. Music lover������

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You can comment all my post on blog������

[Altec Best]

is there an English translation?

Phil do you have google translate ? Just open the blogpost and paste link into it. Click Detect Language and Websites. And then the box on the other link it creates (Red Arrow). I'll post the translated page and the screenshot of Translate. BTW Wally Welcome ! Looks like a nice setup. I'm curious as to what kind of bass you are getting even with an 18" sub I always thought open baffles were lacking in the bass department... Are you getting good bass response ?

Here is the translated version: audioimpresje



Screenshot 2024-12-10 150617 by Altec Best, on Flickr

[Phil-G]

Phil do you have google translate ?

i couldn't find google with this stupid linex.

[GM]

Google Translate

[wally1966]

Phil do you have google translate ? Just open the blogpost and paste link into it. Click Detect Language and Websites. And then the box on the other link it creates (Red Arrow). I'll post the translated page and the screenshot of Translate. BTW Wally Welcome ! Looks like a nice setup. I'm curious as to what kind of bass you are getting even with an 18" sub I always thought open baffles were lacking in the bass department... Are you getting good bass response ?

Here is the translated version: audioimpresje



Screenshot 2024-12-10 150617 by Altec Best, on Flickr

Thank You for English translate
Bass response is really good. 18" Beyma is good, fast speaker. Of course, system must be biamped. Big woofer is too much for 2A3 amp. Push pull or transistor is much better for woofer driving