The JERN 514 is available in 2 versions
JERN 514 ES using the JERN 14 ES: 4 Ohm, 88dB for 2,83V at 1 meter, 50 Hz to 20 kHz -6dB.
JERN 514 EH using the JERN 14 EH: 4 Ohm, 88dB for 2,83V at 1 meter, 50 Hz to 25 kHz -6dB.
The new JERN 514 woofer is a bespoke SEAS long-stroke woofer. It can play 7 dB louder in the bass, than the driver in the JERN 14.
Because the woofer is very close to the floor, the room gain works better. Therefore the JERN 514 frequency response in a normal room can go down to 30 Hz and even lower due to room gain from the floor, the walls, and the ceiling.
The new bespoke SEAS woofer also has an excellent midrange performance. It has a special metal cone, with the break-up resonance moved up to 8 kHz!
This is higher than most expensive ceramic or new material cone woofers. An 8 kHz notch filter is used to reduce the level at the break-up resonance.
All stiff cones have a break-up resonance. A higher frequency greatly reduces the problems caused by the break-up resonance, because the crossover easier can reduce the sound level of the break-up.
Because the notch filter reduces the 8 kHz peak a lot, we can use a 6dB per octave low pass filter at 150 Hz for this excellent woofer. That makes the JERN 514 woofer a very fast woofer. Perhaps the fastest woofer ever made.
The JERN 14 is secured to the stand with an M6 bolt with a few mm of freedom. This allows you to tilt and turn the JERN 14 very easily. So that you get the best sound in your preferred listening position.
So the JERN 14 cannot fall off the stand. And the tilting and turning of the JERN 14 can be done without loosening the M6 bolt.
The total height of the JERN 514 is about 80 cm.
The JERN 514 has 5 pcs height-adjustable rubber feet, with felt material towards the floor. So an uneven floor is no problem. The 5 feet makes the JERN 514 loudspeakers very stable on all floors. Just like a 5 wheel office chair.
The felt makes it easy to slide the JERN 514 loudspeakers around on a smooth floor surface.
All older JERN 14 can be upgraded to a JERN 514. Simply order these upgrade kit parts, JERN W14 woofer, the stand for W14 and a rubber ring.