2245 up to 300hz?

[pos]

You are probably right, but it will have to live with a smaller volume for now...
8 cu ft is what the 4645/B460 gives to the 2245, and that is also the size of the "small" box in the 1983 article. With a low tuning and some eq (which I hope I can add with small group delay penalty using the PC) it seems quite good.
I also read this thread:
http://www.audioheritage.org/vbullet...ead.php?p=9616

2245 in a sealed enclosures could well be what I need for my room, and a 8 cu ft volume would let me try both ported/sealed design. If it fails then I could build a bigger box, keeping the unchanged HF panel.

This will be the first box I build, maybe I am crazy to begin with such a big box

[rs237]

Yes with that sort of setup you have the best possible transport! Have you tried the FLAC lossless compression file format?

One thing that afraid me a lot is connecting HF/UHF drivers directly to the amp with the sound card as a source: you never knwo if the software of the computer can have a bug a send some fullband signal to their input...
I will use bypassed/biased protection caps at line level before the amp for that, plus some protection systems inside the speaker, just before the HF/UHF drivers.

hello Pos,

no i have not tried FLAC. Hard Disk memory is so cheap, 200EUR (280 $) for 1TerraByte takes place for 1500 CDs. For the best sounding filter I the CD and save 3 files (high, mid, low). Then I play them simultaneously, or delayed for the mid and high. Very low Prozessorlast its the result.
Protection Cabs are ok. I will for the HF / UHF DIY Tube Amps . Here, I can easily limit the frequency response 1 or 2 octaves below the filter frequency limit.

regards

juergen

[JBL 4645]

I was thinking 300Hz and I seemed to remember reading it had limit max up 2Khz so I looked around Google image for the profile specs on the JBL 2245.

[hjames]

I was thinking 300Hz and I seemed to remember reading it had limit max up 2Khz so I looked around Google image for the profile specs on the JBL 2245.

As opposed to going to JBLPRO and just reading the specs there?

http://www.jblpro.com/pages/components/2245h.htm
pointing to the brochure here:
http://www.jblpro.com/pages/components/2245H.pdf

Anyway, wouldn't you think this spec is significant?
Highest Recommended Crossover Frequency: 800 Hz

I mean, I'd figure they know what they are talking about if they recommend
800hz as the MAX crossover freq.
Its a LONG way from there to 2000Hz -

[JBL 4645]

As opposed to going to JBLPRO and just reading the specs there?

http://www.jblpro.com/pages/components/2245h.htm
pointing to the brochure here:
http://www.jblpro.com/pages/components/2245H.pdf

Anyway, wouldn't you think this spec is significant?
Highest Recommended Crossover Frequency: 800 Hz

I mean, I'd figure they know what they are talking about if they recommend
800hz as the MAX crossover freq.
Its a LONG way from there to 2000Hz -

Yeah maybe for LF bass to mid range and HF horn housed on top of the enclosure.