Hello every one.
I own a pair of JE Labs 300B monoblocks amps (about 8 watts per amp) and I just score on E-Bay a pair of Altec Lansing duplex 601C 12 inchs speakers with the original N-3000-E dividing network
TWO 12" ALTEC SPEAKERS
Altec Lansing duplex 601C specs are :
Power : 20 watts (30 watts peak);
Frequency response : 30 - 22000 cycles (Hz);
Pressure sensitivity : 100db SPL at 4 ft. from 1 watt;
Impedance : 8 Ohms;
Cone resonance : 32 cycles (Hz);
Magnets : Alnico V;
Diameter : 12 1/8 inchs;
I'm limited for space, I can have relatively tall or wide speaker cabinets but not to deep, 14'' or 15'' would be the maximum but 12'' would be ideal.
I'm looking for your suggestion of a cabinet to match this system, any ideas ?
(I'm listening all kind of music ranging from Hendrix to Mozart, blues, rock, new age etc...).
Thank you very much, Jean
I own a pair of JE Labs 300B monoblocks amps (about 8 watts per amp) and I just score on E-Bay a pair of Altec Lansing duplex 601C 12 inchs speakers with the original N-3000-E dividing network
TWO 12" ALTEC SPEAKERS
Altec Lansing duplex 601C specs are :
Power : 20 watts (30 watts peak);
Frequency response : 30 - 22000 cycles (Hz);
Pressure sensitivity : 100db SPL at 4 ft. from 1 watt;
Impedance : 8 Ohms;
Cone resonance : 32 cycles (Hz);
Magnets : Alnico V;
Diameter : 12 1/8 inchs;
I'm limited for space, I can have relatively tall or wide speaker cabinets but not to deep, 14'' or 15'' would be the maximum but 12'' would be ideal.
I'm looking for your suggestion of a cabinet to match this system, any ideas ?
(I'm listening all kind of music ranging from Hendrix to Mozart, blues, rock, new age etc...).
Thank you very much, Jean
Hey there! If you don't get much response here there's an Altec board I will link for you.. If it loads funny just try again as there seems to be some glitches happening with the site at times.. GM is pretty much the guy you want to get chatting to concerning Altec among other things, hopefully he has some spare time and will see your post here.. Anyhow cheers!
Altec User's Board
Altec User's Board
Thank you Dave for the link, I will try there maybe I will have more responses !
So far I'm tempted by the Karlson k12 cabinet, efficient and small, I'm just afraid ending having to much bass but I don't know.
So far I'm tempted by the Karlson k12 cabinet, efficient and small, I'm just afraid ending having to much bass but I don't know.
Greets!
These are basically 414 woofers, so the classic alignment is ~6.5 ft^3 tuned to actual driver Fs, which typically yields Altec's 'West Coast Sound', i.e. prominent mid bass with decent power handling whereas ~10 ft^3 gets a more balanced sound all the way down to Fs in a typical room, though with reduced power handling down low unless there's significant [small] room gain.
Ideally the driver will be centered at average seated ear height and down from the cab's inside dimension ~33-40%, so these two will determine total cab height and make the baffle as wide as practical, which of course will be limited by its minimum depth = ~1.5x driver depth.
The vent will ideally be down from the inside top ~0.8-0.86x.
Altec's typical damping of 1-2" [your choice] acoustic fiberglass insulation [OC 703 nowadays] on the top, one side, back down about 60-70% is normally plenty, though you may want to do the vintage 'click' [impulse] test to confirm the vents are damped enough by the cab's high aspect ratio TL pipe harmonics.
GM
These are basically 414 woofers, so the classic alignment is ~6.5 ft^3 tuned to actual driver Fs, which typically yields Altec's 'West Coast Sound', i.e. prominent mid bass with decent power handling whereas ~10 ft^3 gets a more balanced sound all the way down to Fs in a typical room, though with reduced power handling down low unless there's significant [small] room gain.
Ideally the driver will be centered at average seated ear height and down from the cab's inside dimension ~33-40%, so these two will determine total cab height and make the baffle as wide as practical, which of course will be limited by its minimum depth = ~1.5x driver depth.
The vent will ideally be down from the inside top ~0.8-0.86x.
Altec's typical damping of 1-2" [your choice] acoustic fiberglass insulation [OC 703 nowadays] on the top, one side, back down about 60-70% is normally plenty, though you may want to do the vintage 'click' [impulse] test to confirm the vents are damped enough by the cab's high aspect ratio TL pipe harmonics.
GM
Altec Lansing 601c cabinet size
On your 601c the woofer is basically the same as a 414 series and it seems Altec recommends a 3.5 cubic foot ported cabinet. I am using Altec 416 8b and i run them in the recommended 7.5 cubic foot cabinet with two 4"diameter 5" deep ports this tunes them down to about 32hz they sound amazing. The 3.5 cubic foot cabinet will limit your deep bass but you can always add a good sealed sub.
On your 601c the woofer is basically the same as a 414 series and it seems Altec recommends a 3.5 cubic foot ported cabinet. I am using Altec 416 8b and i run them in the recommended 7.5 cubic foot cabinet with two 4"diameter 5" deep ports this tunes them down to about 32hz they sound amazing. The 3.5 cubic foot cabinet will limit your deep bass but you can always add a good sealed sub.
Thank you guys, this help me a lot, I just made calculations and the Altec Stonehenge I enclosures at 37.5'' H, 16'' W and 14 1/4'' D would give me 3.82 Ft cube with 0.75 thich material just about what I need, and the drivers are higher than the Karlson design. They look cool to ! Thank's!
I found a nice plan of the Altec 620 enclosure witch use a 15'' speaker, I would like to scale down the Altec 620 to fit my 12 inchs speakers,
Is there an easy formula to do so ?
Thank you, Jean
Is there an easy formula to do so ?
Thank you, Jean
Maybe, but not aware of one. Anyway, here's the basic dims of Altec's 1974 recommendation: http://www.lansingheritage.org/images/altec/plans/1974-enc-design/page21.jpg
GM
GM
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