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April 2013
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NTM-102 Tube Karaoke Preamplifier

Built on a single frame, but music and karaoke function with independent design and use of electronic switches to interact should have removed unwanted interference noise when listening to music. With the output impedance 100 ohms, the NTM-102 easily compatible with other types of power amplifiers and other signal wires.

the NTM-102 balancing technique used for the frequency range and wide-range music for late effects of singing.

Power Consumption: 50 Watts.
Mains Voltage:
AC 100v/120v/220v/240v.
• (factory set for destination country).
Mains Frequency:
50Hz – 60Hz.
Input Sensitivity / Impedance:

• Mic1 & Mic2: 2.5mV / 600Ω.
• CD-in: 200mV / 30kΩ.
• Music-in: 150mV / 30kΩ.
Tone Control:

• Bass: ±10dB at 100Hz.
• Treble: >10dB at 10kHz.
• Mic1 & Mic2 tone: 70Hz ±10dB & 10kHz ±10dB.

ALC control: boost at +10dB.
Delay time: 30ms – 500ms (±15%).
Frequency response: 15Hz – 25kHz (-1dB). Signal-to-Noise ratio: >80dB.
Total harmonic distortion: 0.08% THD.
Rated output level / impedance: 2v RMS / 100Ω.

Tube complement:

6H3-EB x 2 dual triodes. 6H1-EB x 1 dual triodes.

Input & Output connectors:

Two pairs unbalanced RCA input.
Two pairs unbalanced RCA output. 3-pin IEC standard power connector.


Width: 19” (48cm) – 20.5” (52cm) Shipping. Height: 3.5” (8.9cm) – 6.7” (17cm) Shipping. Depth: 11.4” (29cm) – 13.8” (35cm) Shipping.


Net Weight: 12.8lbs (5.8kg).
Shipping Weight: 15.6lbs (7.1kg).

NPA-400T Power Amplifier

The NPA-400T power amplifier circuit design transplant, Mosfet and used power bipolar transistor, to optimize the linear properties of the circuit.

design with silver coated fiber distribution components allow reasonable shortest signal path, reducing parasitic capacitance and resistance wires to get the signal source clean and minimum attenuation.

high-performance power transformers, power supply capacitance than 44.000uF factors combined to avoid interference, make up the supply of energy

Power Consumption: 550 Watts.
Mains Voltage:
AC 100v/120v/220v/240v.
• (Factory set for destination country).
Mains Frequency:
50Hz – 60Hz.
Power Supply Capacitance:
44,000uF total.
Input Impedance:
20kΩ shunted by 100pF.
Input Sensitivity:
1.1v RMS to rated power.
Voltage Gain:
Frequency Response:
15Hz – 35kHz (-1dB).
Signal-to-Noise Ratio:
Total Harmonic Distortion:
0.05% THD.

Frequency response: 15Hz – 35kHz (-1dB). Signal-to-Noise ratio: >85dB.
Total harmonic distortion: 0.05% THD.

Output impedance:

Stereo mode: 4Ω – 8Ω.
Bridged mono mode: 4Ω – 16Ω.

Rated output power:

Stereo mode: 200w@8Ω – 380w@4Ω (both channels driven). Bridged mono mode: 380w@4Ω.


Short circuit protect. Thermal protect.
Speaker protect.

Input & Output connectors:

One pair unbalanced RCA input.
Two pairs loudspeaker output with banana-plug sockets. 3-pin IEC standard power connector.

Dimensions: EIA Standard.

Width: 19" (48cm) – 20.5” (52cm) Shipping.


Net weight: 18lbs (8.2kg).

Shipping weight: 20.9lbs (9.5kg).



Pre: SE MKII Tupe PreAmp

Inputs: 3 Pairs RCA.
Main Outputs: 2 Pairs RCA.
Maximum Gain: 24.5dB.
Maximum Output: 15v.
Frequency Response: 10Hz – 25kHz (-2 dB at 25kHz).
Noise-Unweighted: -82 dB.
Distortion: less than 0.03%
Phase: phase inverting.
Input Impedance: Approximately 50k Ohms.
Output Impedance: less than 1.8k Ohms.
Tube Complement: 8 x 6H1-EB dual triodes.
Mains Voltage: AC 100v/120v/220v/240v.

NVS-211SE Tube Power Amplifier

Introducing the new NVS-211SE single ended directly heated triode amplifier. The NVS-211SE delivers the superb sound quality of the original NVS-211SE and now produces 20 Watts RMS into 8 ohms.

The NVS-211SE is a 100% pure class A single ended vacuum tube amplifier. The Type 211 directly heated triode vacuum tube is justly famous for its huge soundstage, sweet tone, and authoritative presentation of music. The tube compliment combined with innovative circuitry maintains the right combination of pace, rhythm, and timing.. The NVS-211SE is designed to drive medium, as well as high efficiency speakers. Quality, Value, and Performance, by Navison audio, "Hand made in VN with a passion for sound since 2006"

Circuit Type: Single-Ended Class A Triode.
Power Output: 40 watts Class A into 8 Ohms (both channels driven).
Input Sencitivity: 2v RMS for full output.
Input Impedance: 100k Ohms RCA.
Frequency Response: 18Hz – 22kHz.
Hum and Noise: -80dB below rated output.
Distortion: less than 1.5% THD.
AC Power Requirements: AC 115v – 230v @ 50/60Hz.
Power Consumption: Approximately 140 watts.
Weight: 37lbs.
Dimensions: 24.8(D) x 9.05(W) x 8.86(H) inches
Warm-Up Time: 10 Minutes.

Tubes: 1 x 211 (output), 1 x 6V6 (second stage), 1 x 6SL7 (first stage).
Break-In Time: 100 hours of music playing time.

Every Navison product is patiently and carefully hand assembled, then individually inspected and its performance verified by an experienced audio technician. The owner is protected by our three year limited warranty covering labor and parts except vacuum-tubes. Service is a top priority at Navison audio.

NVS-150 Reference OTL Tube Power Amplifier


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