audio research
EC-4

Description
Tube 3-way electronic crossover.

Introduced
1974

Discontinued
1977

Revisions
EC-4A

Options
-

MSRP (US new retail)
EC-4A: $350

Specifications

Distortion  
Noise  
Gain  
Crossover points Frequencies are adjusted by changing capacitors on the circuit board. Crossover points are selectable at 50/100/400/500/800/1k/1.5k/2k/3.5k/5kHz
Crossover slopes The slopes are adjustable at 6/12db/octave below 200Hz and 6db/octave above 200Hz
Tube complement (6) 12AX7
Power requirements  
Other  
Dimensions  
Weight  

Reviews

Number 8 (EC-4A: Full Review)

Pictures

EC-4:

EC-4A: