Speakers, 70's style

Your cats seem to love them

is there a reason the box's are so big? they look good though

I take it that T Line is Transmission Line? IIRC, there was a guy with loads of t-line cabinets shoved in a rusty anglebox in the 90's and he was hitting SPL's of 147 ~ dB!

Sweet work that man!

Rysz.

no idea what that means but kewl ;D

Found this on the net which might explain as I wasn't sure either.



Some speaker types are much more efficient than others: most notably, horn type systems are the most efficient. Some narrowband horn systems have efficiencies approaching 50% (this may still seem like a low number but for a speaker it is extremely high). The reason horn systems are so efficient is that the horn acts like an impedance matching device (to the air) ; essentially an acoustical transformer. Whenever you cup your hands around your mouth to increase the volume when shouting at someone, you are forming a (crude but effective) horn. Many high frequency and midrange speakers are of the horn variety. Due to physics, low frequency horn speakers are very large (if not huge); hence the reason for "horn woofers" being scarce. A number of low frequency horn systems are available, but they are usually of the folded horn design. Because a low frequency horn would be excessively large (a big consideration for portable sound systems), engineers came up with the folded horn design. Folded horns result in some losses (as compared to a "straight" horn), but the result is still a very efficient (again, relatively speaking) system.




Nice speakers though are you leaving them bare like in the pics or covering them?

Well, they were sounding a bit flat, uncontrolled and had a hole in the upper bass/lower mid frequencies.

Been playing with the stuffing


Sounding ace now!

Flat response down to 40hz with good bass extension down to, u dunno, lower than 30hz. They probably reach down lower too.

Sort of seizmic room vibrating but too low to hear kind of bass.

In a 1 bed flat i don't think the neighbours will like me much any more

Seas A26RE4 and Seas 29TFF/W, although ill probably play with different tweeters.

I have cabinet plans and crossover schematics if anyone interested in building a pair.

There quite high sensitivity and a very easy load so ideal for low power valve amps.

Yeah, cabinets are specificaly designed for these drivers, cant just put any drivers in them.

Speaker cabinets are tricky, you need to know what your doing, you need to know all the specifications for the drivers and know how to in interpret it all.

I certainly don't.

If you just build a box and chuck the drivers in you'll get all sorts of dips and peaks in the frequency response and impendance will be all over the place.

Its just not that simple.

If anyone wants to build any speakers i can point you at a couple of sites with box plans for specific drivers. Maily full range drivers so no crossovers to worry about

The midrange and treble would probably be excellent - but there'd be no bass whatsoever. They are probably satellites with a sub hidden in a corner somewhere.