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Chip Amps Amplifiers based on integrated circuits

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Old 11th September 2008, 09:55 PM   #781
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My God!.. certainly built on a 'trouser flapper' scale.

Do you know what hz they go down to? Is it a sort of horn TL system?
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Old 12th September 2008, 06:32 AM   #782
Puffin is offline Puffin  United Kingdom
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They are a back loaded horn design. If you look at the Fostex website you will see the design for the 208 cabinet. The speaker sits in front of what is called the throat which creates pressure behind the driver, this then flows down through the folded horn, and out throuhg the mouth at the front.

It is said that the design optimises the pressure on the speaker cone and it is effectively driving the room. Bass is probably 40Hz
(but will be room dependant)

They say you either love or hate horns. I love mine.
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Old 14th September 2008, 03:12 PM   #783
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ahh, good old fostex.. i had some Foster tweeters from the 70s that were quite impressive.

i also had some 4" drivers somewhat like the ones your using. never really did anyting with them tho, a friend had given me a ton of the 3" tweeters, 5 1/4" midranges and those weird 4" dual cone drivers.
the tweeters and midranges i used a bunch of and loved

foster changed their name to fostex at one point, dont know why tho?
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Old 18th September 2008, 10:51 AM   #784
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Default A couple of years ago i have assembled this one


And the unit sounded very good, gave me a lot of good moments listening to it.

regards,

Carlos
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Old 19th September 2008, 01:32 PM   #785
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My first (successful) chip amp, a TDA7560 car amp, in a Zapco AG150 for enclosure:
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Old 19th September 2008, 01:33 PM   #786
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Old 19th September 2008, 06:46 PM   #787
h@kan is offline h@kan  Sweden
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[QUOTE]Originally posted by Redshift187
My first (successful) chip amp, a TDA7560 car amp, in a Zapco AG150 for enclosure: [/QUOTE ]

I dont think you will have any overheating issues with that heatsink!

Nice!

cheers/H@kan
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Old 19th September 2008, 08:51 PM   #788
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Thanks. Yeah, playing fairly loud with two 4 ohm speakers while testing, the heatsink never even got warm.
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Old 20th September 2008, 03:10 PM   #789
bego2 is offline bego2  Croatia
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niceee car amp.

here`s my new amp for testing.
Click the image to open in full size.
Click the image to open in full size.

small case for tda 7269 amp, 2x10w, cost me nothing

just need to finish a front panel...
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Old 21st September 2008, 12:02 AM   #790
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My first version of a 3 way chipamp.

LM3875 for the tweeter an the mid's and 2 prallel LM3886 for the bass.

The design was changed to a better PCB design and switch mode PWS.
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