got some sony CFD 560 "dual cone integral mega bass" speakers
They came in ok-ish condition. working. just needed some touch ups
I decided to open them both up clean them out and put some acoustic stuffing in to dampen the vibrations.
I then applied a custom EQ tweaking it to sound as flat as possible and balanced. reducing any peaks (only major peak is around 137hz because of room gain really)
tweaked the midrange and highs a little and now they sound very crisp and way better than without an EQ
I also super-glued a small square of cardboard on the inside of both speakers on one of the "bass ports" on both speakers lowering the tuning significantly.
reducing the boominess and improving the bass massively around 50hz they actually produce clean bass enough to really hear it audibly and it doesnt just sound like a bunch of overtone boominess anymore.
the speakers look like these
not the exact pair I have. don't have any personal pics of them yet but this is the same model as what I have
They came in ok-ish condition. working. just needed some touch ups
I decided to open them both up clean them out and put some acoustic stuffing in to dampen the vibrations.
I then applied a custom EQ tweaking it to sound as flat as possible and balanced. reducing any peaks (only major peak is around 137hz because of room gain really)
tweaked the midrange and highs a little and now they sound very crisp and way better than without an EQ
I also super-glued a small square of cardboard on the inside of both speakers on one of the "bass ports" on both speakers lowering the tuning significantly.
reducing the boominess and improving the bass massively around 50hz they actually produce clean bass enough to really hear it audibly and it doesnt just sound like a bunch of overtone boominess anymore.
the speakers look like these
not the exact pair I have. don't have any personal pics of them yet but this is the same model as what I have
Good bit of fun. I recall a thread here were someone fully modded a PA cab to get rid of resonances. Worked well for him.
I got an ancient set of big technics cabs for $20 recently, very beaten up but upon opening them I discovered that a previous owner had replaced the woofers with much better modern units. I plugged up the port and sealed the tweeter/midrange holes, measured and eq'd with minidsp and they serve as fine woofers for mucking about with.
I got an ancient set of big technics cabs for $20 recently, very beaten up but upon opening them I discovered that a previous owner had replaced the woofers with much better modern units. I plugged up the port and sealed the tweeter/midrange holes, measured and eq'd with minidsp and they serve as fine woofers for mucking about with.
The little tweeters on the top on these speakers are as good as fake sadly they produce almost no sound at all. they are just terrible low output piezos. Also I dont have any measurements but I'm pretty sure these have a decent to alright frequency response after setting my custom EQ up. I dont hear any bad peaks or dips when running through the frequencies with
Online Tone Generator - generate pure tones of any frequency
it sounds pretty flat and good to my ears.
I'm not sure how you could set up a crossover with these. theres not really any ideal way of replacing the piezo with a proper tweeter of any sort without some modifications to the speaker cabinets.
otherwise just having an custom equalizer seems to work perfectly.
Online Tone Generator - generate pure tones of any frequency
it sounds pretty flat and good to my ears.
I'm not sure how you could set up a crossover with these. theres not really any ideal way of replacing the piezo with a proper tweeter of any sort without some modifications to the speaker cabinets.
otherwise just having an custom equalizer seems to work perfectly.
I bit the bullet recently and bought the UMIK calibrated mic, not cheap but jeez makes life easy.
I think cheapo speakers can make excellent subjects for experiments. If you don't mind big speakers I'd be keeping my eye out for them. Good bang for the buck.
I think cheapo speakers can make excellent subjects for experiments. If you don't mind big speakers I'd be keeping my eye out for them. Good bang for the buck.
I have two 12-inch subwoofers under my desk. each rated 250W RMS.
in a split-chamber 34hz tuning frequency 1.8cubic feet per subwoofer enclosure
and they get so loud with my 500W RMS amplifier. only probably giving like 100 to 150 watts RMS at most per speaker it hits hard but I only use them occasionally since im in an apartment.
in a split-chamber 34hz tuning frequency 1.8cubic feet per subwoofer enclosure
and they get so loud with my 500W RMS amplifier. only probably giving like 100 to 150 watts RMS at most per speaker it hits hard but I only use them occasionally since im in an apartment.
I want to get some vintage 12-inch subwoofer fisher speakers fully intact with working and fine-tuned crossovers so they are reasonably balanced and port tuning around 30 to 34hz maybe lower if possible.
but those things cost some serious cash to find on ebay due to rarity and nobody makes them anymore.
but those things cost some serious cash to find on ebay due to rarity and nobody makes them anymore.
Very specific requirements, any reason for that? I'm not familiar with that speaker. Love the old stuff though.
its pretty old but for the ones that are fully intact are pretty cool to have. i want a pair cause they look really cool and "old style" if that makes sense
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