KEF Mini Transmission Line Box

[koozoop]

Helo everyone! I'm new to the whole DIY audio concept. My uncle gave me a couple of KEF B110B's (SP1057) and T27's. He used to have them on a Constructor CS1 Model. He also gave me an old design of a mini t-line box to make (see attached images). I want your opinion on this design. Can u suggest a DIY stereo amplifier to drive these units. I don't need sth expensive or exquisite as i will only playback mp3 and flac audio files (mostly rock, blues and jazz music). Thank u in advance for your any answers!

[planet10]

Besides being for the B200 which makes it unsuitable right off the top, i'd be looking to get the B110 into a TL done with modern design techniquies.

dave

[talaerts]

In fact, your B110 and T27 were the heart of the famous compact LS3/5 and LS3/5A monitor speakers, still a benchmark for voice reproduction.
Therefore, I'd look for plans of the LS3/5A and its filter. It's probably the best application for them.
For example, browse http://www.ls35a.com/

Regarding affordable DIY amps, these speakers may be refined in sound, but they were low sensitivity as well, so don't think about a low-powered tube amp for them, I'd rather google for "gainclone kit", and check out sites like http://www.audiosector.com/ and http://chipamp.com/

[planet10]

(the new) Falcon Acoustics is again making & selling LS3/5A XOs.

Even if you put them in a TL, the top of the list for XOs

dave

[sreten]

Hi,

FWIW the CS1 kit came with crossovers and that is what you should use.
AFAIK the drivers versions for the CS1 do not suit LS3/5A c/o's at all.

A tall slim TL is certainly doable, with the same baffle width as the CS1 plans.

rgds, sreten.

[koozoop]

Thanx for your responses! Having a look at The Unofficial LS3/5a Support Site got me some interesting ideas... I think I'll go for the LS3/5a kit and will make a sub woofer like this: LS3/5A Home-made Bass Extenders. Only problem is that they don't make B110B's no more so I'll look for a similar unit (maybe the Peerless SKO130 5").

[sreten]

Hi,

What LS3/5a kit ? I'll repeat specifically the CS1 drivers are not the same.
What you want is the CS1 crossover, not the expensive LS3/5a crossover.

rgds, sreten.

[Mr. dB]

Originally Posted by planet10

Besides being for the B200 which makes it unsuitable right off the top, i'd be looking to get the B110 into a TL done with modern design techniquies.

dave

You're looking at two different designs. The one on the left in the trapezoidal box is a sealed enclosure for the B200, the small t-line on the right is for the B110. I remember seeing both designs published in the 1970s.

I was always curious about that small t-line, but I didn't know anyone who actually built that one. There were quite a number of us who were followers of all the DIY speaker projects published in British magazines such as Wireless World and HiFi News in the 1970s.

[talaerts]

sreten is right, I didn't know that there were so many variants of the venerable B110, and your SP1057 variant does not have a crossover listed at Falcon Acoustics.
Indeed, best to recuperate the CS1 filter as well, or google for the schematic if you don't have the cabinets with the filters anymore.

[koozoop]

Sreten you're right. I downloaded the specification sheets from kef and saw the differences. So I'll be better off with either the CS1 or the Mini-TL design. Doy u think I'll still be able to use the AB1 as a sub-woofer but with a different x-over?