Since AKG engineers can build on more than fifty years of expertise in designing condenser microphones for tough usage in the studio, Ultra Linear Series microphones meet the highest engineering standards. One of the most important requirements was absolutely linear characteristics of all essential parameters.
Low self noise and high SPL capability ensure a dynamic range of 120 dB or higher for all ULS microphones. ULS microphones will perform to specifications even when called upon to drive difficult loads including the excessively long cables needed in many situations.
Finally, the superior features of ULS microphones will immediately become obvious in any A-B listening comparison with similar conventional microphones.
The ultra-light diaphragm made of gold-sputtered plastic foil has an acoustically active diameter of 0.6 in. (15 mm).
The gold plated backplate is finely polished and lapped to keep dimensional accuracy within some tenths of a micron.
Precision wire-mesh is used for the acoustic resistors in the sound paths of the unidirectional ULS capsules (CK 61-ULS shown).
Gold plated connector pins guarantee perfect contact under all climatic conditions.
Extremely short signal paths keep stray capacities in the high-Z section to a minimum.
The discreet impedance converter/preamplifier stage uses a special circuit configuration that ensures extremely low self noise.
The integration density of the electronic circuitry requires a multilayer circuit board.
The two separate bass cut and gain switches use gold plated contacts.
This control is used during production to fine-adjust the capsule polarization voltage and is then sealed.
The DC/DC converter generates a stable, noise-free polarization voltage for the condenser capsule from any phantom voltage between 9 and 52 V.
These filter components keep unwanted RF signals out of the advanced preamplifier.
The XLR connector uses gold plated contact pins to ensure a low-Z connection to the subsequent device.
