400D Hybrid Bass Amp

800D Hybrid Class
HEVOS 400D Hybrid Bass Amp - € 1.345,00 NEW

The Hevos 400D is an exciting new professional bass amplifier with a tube preamp and a MOSFET class-D power amp. It's feature-rich and well thought out, yet the visual styling is elegant and clean. Components are of the highest quality, including double-sided PCBs, MKP capacitors, top-drawer resistors, Neutrik connectors, and dustproof pots.

The 400D is only one rack unit high (1.75''), making it the slimmest professional bass amp. Yet a good portion of the 8.5 kg (18.7 lbs) weight is from the heavy power supply transformer, which is a breakthrough with its low-profile ultra-flat configuration. This transformer provides very stable power for the tube preamp and the power amp, and has built-in thermal protection.

Hevos 400D internal view The picture at the right gives you an inside view of the 400D amp. At the bottom/front there is the pre-amp with 12AX7 tube at the left side of it. This tube performs the amplifying in the pre-amp. Above that, with the blue upside-down T-shaped element, is the class-D power amplifier, not much larger than a pack of playing cards. The large toroidal transformer at the right is the heart of the power supply, allowing the amp to provide full power even for the lowest notes.

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. The 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. The EQ controls all increase in effect as they are moved farther 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. You can easily use the 400D in a studio environment because there is no fan noise.

As a professional piece of equipment, the power amp in the 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!

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

Height: 1 hu
Power: 400 Watts/4 Ohms
Damping: >2000/1 kHz/4 Ohms
Tube: 12AX7
Inputs: active/passive
Tone control: 5 band active
Protection: short circuit,open output,DC-protection output, temperature protection transformer, mismatch, clip, delayed switch
Divers: mute-out,headphone output, mixable effect loop with footswitch, symmetrical line-out with pre-post switch
Output: 2x Speakon
Weight: 8,5 kg
incl. Flightcase

SKU hev400d
(Incl. 19% tax)
1 In Stock


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