Cruz

CRUZ audio products are always the latest developments in digital audio amplification and digital signal transport. CRUZ will change this worlds Class-D amplification.

Everybody seeks for new Class-D designs, but even in this field there is seldom something new. The existing digital designs have all the same problems. The CRUZ frequency range is flat and independent from the load. Standard digital designs have small frequency range, low damping factor and a changing frequency bandwidth when the dynamic load changes. CRUZ has no phase shifting.

These “not from this world” products are exclusively based on the worldwide acclaimed patents from our senior technician Mircea Naiu.

CRUZ is a revolutionary step forward in electronics design in terms of efficiency and performance. It started with the analogue to digital An+Di power amplifier in the year 1995. The search for true digital audio amplification went on.

In 1999 we developed a digital amp where at first the absolute value from the signal that should be amplified, is amplified in an amplitude way and that after that, the polarity is phase right switched.

In 2001 the StraDa digital power amplifier, using the patent described above, became reference at the German magazine Stereoplay and was honouree for the Component Of The Year Award (COTY) in Japan.

Now the CRUZ Stereo and Mono are presented with the latest inventions.
These inventions are combined in a true digital, Dual (Stereo) or Quadra (Mono) balanced power amplifier. The Mono is switched in bridge mode.

The philosophy of the CRUZ is as simple as difficult. To create the ultimate in audio amplification, without simplifying, bargaining and cheating.

Simple is, to buy the best components and to use a known design. All Class-A, Class-AB and tube amplifiers are working on the Marconi principle. There are no real new developments in these amplifiers.

Difficult is, to manufacture by ourselves the sound important components, to evaluate all these components by listening, to invent new patents, to structure these electrical designs and to voice the whole electrical scheme of a new principle.
In this way, CRUZ became a “cost no object” and an ultimate high end product.

One of the critical inventions to stabilize the frequency bandwidth in the CRUZ amps is the overall feedback loop, which is part of the modulator. All switching amplifiers are using feedback loops of some sort. In the CRUZ amps, the output filter is part of the modulator circuit and included in the feedback loop. An analogue computer, compares, adjusts and controls the switching modulator signal with the analogue input signal.

All class-D amplifiers are extremely efficient compared to the Class-A and Class-AB designs, which are mostly used for audio amplification. The efficiency of the CRUZ amps is 92%. Class-A amps have an efficiency of 10-15% and Class-AB of 30-40%.

CRUZ uses a digitally processed, switching power supply controller. This digital control circuit is necessary to deliver fast enough and in tact, the needed voltage at high modulation frequencies as 3 MHz.

The CRUZ is the most significant development in Class-D amplifier technology at the moment. It’s a real breakthrough for high-end audio. It combines the ultra-high efficiency of Class-D with the stunning audio quality of the best sounding high-end amplifiers.

CRUZ digital power amplifiers are amplifying in analogue and digital (AN+DI) mode transferred in Class ND technology. All power amps are featuring:
Digital processed controller for the switching power supply;
Feed-back circuit starting directly before the loudspeaker outputs;
Analogue computer, compares, adjusts and controls the switching modulator signal with the analogue input signal;
Processor controlled optical input detection with automatic stand-by;
Processor controlled input-output status;
Slow start AC power circuit;
Cinch (WBT), XLR (Neutrik) and Cruz (BNC) standard input connections;
Heavy duty loudspeaker connections (WBT).