Recent content by boXem

It is the 2 channels {interface board + 2 NCx500} used in the A 5517/N2 - A 5519/N2 - A 5519/N3 - A 5519/N4 and A 5519/N5. Measurement was made on a A 5519/N2.

Finally took the time to run some measurements on the production boards. Quite happy with the result. High gain has a sensitivity of 2V, measured SINAD 5W 4R at 107.6 dB Low gain has a sensitivity of 4V, measured SINAD 5W 4R at 109.2 dB So better than competition at equivalent gain if memory...

A custom installer - customer of us - was searching for an amplification solution able to deliver 1kW into 8 Ohm. Here enter the A 5519/N2 and A 5519/N4 bridged using an Y cable (phases are already internally inverted):

Hey! The SMPS1200 is an unregulated SMPS, meaning that it's output voltage decreases with load. When the output voltage is too low, it will consider that it is overloaded and shut down. Fact is that the output voltage decrease is stronger when low frequencies are reproduced. So, in case of...

First want to see how these are received. Then ... De rien ;)

Hello! Reason is power and the way the power limit is handled. There are combinations load/frequency that can make a pair of NCx500 shutting down a SMPS1200 (no worries, this is smooth). This won't happen with an SMPS3k.

And here we go for the first amps based on the full size chassis: 2 channels NCx500 + SMPS3k from 1230 € VAT excl.: A 5519/N2 Dual mono NCx500 + SMPS1200 from 1495 € VAT excl.: A 5519/N2M 3 channels NCx500 + SMPS3k from 1535 € VAT excl.: A 5519/N3 4 channels NCx500 + SMPS3k from 1825 € VAT...

And as bonus for the weekend, a picture of the optional "ears" for the full size chassis passing the rack test with flying colors

Just realized that some of you guys requested more pictures some time ago. Inside Back mono Back stereo

Standby and On are directly driving the power relay. When the switch is on Auto: Audio + trigger = on No audio + trigger = on Audio + no trigger = on No audio + no trigger = off after 10 minutes It look like some of the first amps built have had the wrong firmware flashed in them, making the...

Hello! Sensitivity is the amplifier input voltage needed to get the amplifier clipping. Sensitivity = (max_power_in_given_load * load)^-2 / gain gain = 10^(gain_in_dB/20) If we take 700W in 4R with 29 dB gain (high), (700 * 4)^-2 / 10^(29/20) = 52.9 / 28.2 = 1.877 V RMS The same with gain at...

a) yes, but not before a few months b) most probably SMPS1200 (1.2 kW - 200W losses = 1 kW at the binding posts at 20Hz in 2R) and a composite gain stage.

Short term plan is a 3 channels Hypex NCx500 for the A series. Wider Arthur with Purifi modules is more part of the mid term plans.

Sure, using a 2kW SMPS without any safety certification or with a loosy one looks like a good plan for a responsible manufacturer.

Indeed. The capacitive load @pma used was completely surrealist and the NC252MP was submitted to a load below it's minimum specified load.