Helix NEXT V TWO – high-output 2-channel amplifier for DSP systems
The NEXT V TWO is a two-channel HELIX amplifier aimed at listeners who want audiophile sound together with high output. Its wide bandwidth, high signal-to-noise ratio and very low distortion suit it for midbass drivers and hybrid subwoofers such as the COMPOSE i5 S200FM, while in bridged mode it can drive DVC2 subwoofers (2 x 2 Ohm) or two series-wired SVC2 subwoofers, e.g. from the HELIX IMPACT range. It shares the dimensions of the V EIGHT for a uniform installation.
The amplifier is designed for HELIX DSP products: the DirectDSP RCA input omits crossover circuitry for a linear signal path, and the V-AMP Link highlevel input accepts the speaker outputs of a HELIX V series amplifier, so several V TWO units can be chained. Setup is handled by the Amplifier Control Panel with push buttons and LEDs, including Auto Gain Ranging. Stabilized Output Power (SOP) and a switched power supply keep performance steady during voltage fluctuations, and the extended 6–18 V input range suits combustion, hybrid and fully electric vehicles.
Key Features
- Class D power: 2 x 200 W RMS at 4 Ohm, 2 x 400 W at 2 Ohm, 1 x 800 W bridged at 4 Ohm.
- Mono/Stereo Mode (MSM): switches between powerful mono for subwoofers and stereo for speakers; mono mode needs only one input signal.
- DirectDSP input: wideband RCA input without crossover circuits for standalone DSPs and DSP amplifiers.
- V-AMP Link: highlevel input matched to HELIX V series speaker outputs; multiple V TWO units can be chained.
- Amplifier Control Panel (ACP): push buttons with LED indicators instead of switches or rotary controls.
- Auto Gain Ranging (AGR): detects the source output voltage and sets the gain automatically within seconds, without clipping.
- Manual gain: adjustable from 0.5 V to 8 V in 0.5 V steps, with gain and clipping LED.
- Stabilized Output Power (SOP): consistent output during voltage fluctuations such as engine start or heavy load.
- Audiophile performance: SNR 109 dB, THD+N below 0.004%, damping factor 350.
- Auto Remote switch: activates the amplifier without an external remote signal.
- Compact, efficient design: SMD construction, low heat dissipation, same dimensions as the V EIGHT.
Inputs & Outputs
- 2 x RCA inputs (DirectDSP), sensitivity 0.5–8 V, input impedance 3 kOhm
- 2 x V-AMP Link highlevel inputs, sensitivity 1.5–21 V, input impedance 13 Ohm
- 1 x remote input
- 2 x speaker outputs
Power & Amplifier Section
- 2 x 200 W RMS at 4 Ohm, 2 x 400 W RMS at 2 Ohm, 1 x 800 W RMS bridged at 4 Ohm (≤1% THD+N)
- Max. output in typical subwoofer applications: up to 500 W RMS per channel at 2 Ohm, up to 1,000 W RMS bridged at 4 Ohm
- Class D amplifier technology with regulated power supply
- THD below 0.003% and THD+N below 0.004% (1 kHz, 1 W into 4 Ohm); damping factor 350; frequency response 10 Hz–22 kHz
- Fusing 3 x 30 A LP-Mini (APS); max. 86 A at 12 V DC; idle current 1,400 mA
Installation & Connectivity Notes
- Operating voltage 10.5–18 V (max. 5 s down to 6 V), start-stop capable; switched supply keeps internal voltage constant during drops
- No built-in crossover or filters – intended to be fed by a DSP
- Can be fed from a HELIX V series amplifier via V-AMP Link, in addition to the RCA outputs of a DSP
- Operating temperature range −40 °C to +70 °C
Technical Specifications
| Power RMS ≤ 1% THD+N | |
| – @ 4 Ohms | 2 x 200 Watts |
| – @ 2 Ohms | 2 x 400 Watts |
| – @ 1 Ohm | – |
| – bridged @ 4 Ohms | 1 x 800 Watts |
| – bridged @ 2 Ohms | – |
| Max. output power per channel* | Up to 500 Watts RMS @ 2 Ohms Up to 1000 Watts RMS @4 Ohms bridged |
| Amplifier technology | Class D |
| Inputs | 2 x RCA / Cinch 2 x V-AMP Link 1 x Remote In |
| Input sensitivity | RCA / Cinch: 0.5 – 8 Volts V-AMP Link: 1.5 – 21 Volts |
| Input impedance | RCA / Cinch: 3 kOhms V-AMP Link: 13 Ohms |
| Outputs | 2 x Speaker output |
| Output voltage RCA / Cinch | – |
| Signal converter for digital input | – |
| Frequency response | 10 Hz – 22,000 Hz |
| Bass boost | – |
| Highpass | – |
| Lowpass | – |
| Bandpass | – |
| Subsonic | – |
| Phase | – |
| Slope high- / lowpass | – |
| Slope subsonic | – |
| Slope subsonic / lowpass | – |
| Signal-to-noise ratio (A-weighted) | 109 dB |
| Distortion (THD @ 1 kHz, 1 W into 4 Ohms) | < 0.003% |
| Distortion (THD+N @ 1 kHz, 1 W into 4 Ohms) | < 0.004 % |
| Distortion (THD @ 100 Hz, 1 W into 4 Ohms) | – |
| Distortion (THD+N @ 100 Hz, 1 W into 4 Ohms) | – |
| Damping factor | 350 |
| Operating voltage | 10.5 – 18 Volts (max. 5 sec. down to 6 Volts) |
| Idle current | 1,400 mA |
| Fuse | 3 x 30 A LP-Mini-fuse (APS) |
| Power rating | DC 12 V ⎓ 86 A max. |
| Operating temperature range | -40 °C to +70 °C |
| Additional features | Auto-Gain-Ranging, Mono / Stereo Mode, Start-Stop capability, V-AMP Link, regulated power supply |
| Dimensions (H x W x D) | 44 x 220 x 180 mm / 1.73 x 8.66 x 7.09” |
* In typical applications as subwoofer amplifier
Scope of Delivery
1 x Amplifier HELIX NEXT V TWO
2 x Allen key
3 x Fuse
1 x Mounting material
1 x Instruction manual
