400D main new

400D small front

 

 

Hevos 400D

 

400D back

400D is a very slim (1.75'') MOSFET class-D amplifier with a tube preamp, that can fit within one rack unit. Components are of the highest quality, including double-sided PCBs, MKP capacitors, top-drawer resistors, Neutrik connectors, and dustproof pots.

A good portion of the 8.5 kg (18.7 lbs) comes from the heavy power supply transformer, being a breakthrough with its low-profile ultra-flat configuration. This transformer provides a very stable source of power for the tube preamp and the power amp and has built-in thermal protection.

The power amplifier is a class-D (PWM) type designed with Philips UcD technology, resulting in an efficiency of more than 90%. The amplifier produces hardly any heat, so there's no cooling fan or even external fins. That makes it very suitable in the studio environment.

The double triode 12AX7 tube in the preamp is fed with DC current to avoid hum, with a built-in startup delay on the anode current for longer tube life. 400D is designed to reproduce your instrument cleanly and accurately with the EQ set flat, but the active 5-band EQ can compensate for difficult acoustic environments. EQ controls all increase in effect as they are moved further from neutral. This brilliant feature provides finer control near the center and greater effect near the extremes.
The power amplifier is a class-D (PWM) type designed with Philips UcD technology, resulting in an efficiency of more than 90%. The amplifier produces hardly any heat, so there's no cooling fan or even external fins. That makes it very suitable in the studio environment.

As a professional piece of equipment, the power amp 400D is protected against short circuit, clipping at the output, and DC. If clipping or DC at the output occurs, the amplifier turns off automatically. And there is absolutely no pop or thump when turning the unit on or off.

400D has a very low total harmonic distortion of 2000. This is an extremely stable amplifier.

Type: Mosfet class-D, high-end
Power: 400 Watts/4 Ohms
Damping: >2000/1 kHz/4 Ohms
Inputs: active/passive
Tone control: 5 band active
Protection: short circuit, open output, DC-protection output, temperature protection, mismatch, clip, delayed switch on
Divers: mute-out, headphone output, -6 dB switch, phase turn switch, symmetrical line-out with pre-post switch
Output: 2x Speakon
Weight: 8,5 kg
Height: 1 hu
Dimensions (HxWxD): 7x51x44 cm
incl. flightcase

 

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