Vintage vs Modern speakers.

Altec Lansing’s Voice of the Theatre Speakers - What You Need to Know

A design by John Hilliard, Altec Lansing Voice of the Theatre systems originally targeted movie theaters. The entire series was gradually expanded for use in general sound reinforcement and later converted in extreme high-end audio segments for hi-fi home use. Dorsey knows cinema sound inside...

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After reading the above article, I had decided to go for active bi amplification without using internal network.

I use Lyngdorf 2170 which has speaker output, analog output and digital output with highpass or lowpass options.


I set the highpass at 500hz on digital output and going through my dac and integrated amp to drive treble horn.


Initially, I had tried to use speaker output of Lyngdorf 2170 with lowpass at 500hz to drive bass unit of Altec A7.


But bass sound is lagging behind the sound from treble horn.

Thus I had used analog output with lowpass at 500hz to Crown XLS 2502 which drive
bass unit of Altec A7.


But bass sound is still lagging behind the sound from treble horn.

Then I had used analog output with lowpass at 500hz to Rogue Cronus Magnum II which drive
bass unit of Altec A7.

Now it is working fine with treble horn.

Many people may think that SS amp sounds faster than tube amp but it is on the contrary.


I had used Telefuken ECC 83 and Amperex ECC 82 in Rogue, but after replacing Amperex with GE 12bh7a tubes, Rogue sound more robust on bass.


After getting rid of internal network, Altec A7 sounds more transparent with clean details.


Since I am happy with sound out of Altec A7 after active bi amping, I retired Lansche 4.1 to attic on the third floor.

Please note that I had been using Lansche 4.1 since 2006 after buying it new at 50k$.

P. S. ticking noise is from my chair while I reord the music sitting in the sofa.

Horn could sound silky not squeaky.

Now I use Cayin 300b PP for treble horn and Rogue Cronus Magnum II fitted with Telefuken ECC83 and GE 12bh7a for bass driver.

It seem to sound very musical with nuanced details.

Bi amping is effective in giving clean and transparent sound.