Single Ended Mono Block Power Amplifier

Se2Se

NAT introduce this ultimate parallel single ended Mono Block Power Amplifier Se2Se. High output power Mono Block Se2Se can easily drive electrostatic, magnetostatic or standard dynamic type of loudspeakers at 4 and 8 ohms equally.

New generation of hand wounded output transformer in combination with very low feedback or zero feedback establish extremely wide frequency response.

Sound quality is totally independent against power supply instability, because all stages in amplifier have stabilisation.

Mono Blocks Power Amplifier Se2Se really shows how powerfull single ended triode amplifier sounds, with damping factor over 25 (to control wide variety of speaker yet zero global feedback design)

NAT Audio has cover page & review for Utopia Direct coupling Line Stage and Se2Se Mono Block Power Amplifier in Netherlands audio magazine "Home Studio" nov/dec 2003. edition.

Click here to download original review (Dutch) (1471 kB)

Click here to download review (English) (531 kB)

Click here to download review (German) (545 kB)

 

 
Technical Specification

Type

Single Ended Class "A"

Power Output

70 Watts @1kHz  4 & 8 ohms

Frequency Response

5 Hz to 80 kHz - 3dB 20Hz to 20 kHz+/-0.2dB @ 8ohms

Input Impedance

100 kohms parallel with 100pF

Input Sensitivity

1.0 V RMS for full power output. Gain:22dB (x13)

Damping Factor >25 (zero global feedback)
Noise 105 dB Below Rated Output "A" weighted
Tube Complement 2 x 6N1P-EV, 2 x 211
Power Requirement 110 VAC or 220 VAC @ 50 to 60 Hz, 250 VA
Dimensions 11.8" (300 mm) wide x 24" (610 mm) deep x 10.2" (260 mm) high
NET Weight approx. 75 lb.. (34 kg) unpacked / per piece
TOTAL Weight approx. 106 lb.. (48 kg) packed / per piece

Design Features

- single ended type
- mono block concept
- pure class "A"
- triode based configuration
- direct coupled driver (without capacitor or inter stage transformer)
- direct heated 211 triode output tube
- zero global feedback design
- hand wound output transformer designed for NAT
- polypropylene capacitors in power supply
- all regulated power supply (included the output stage)
- soft start operate
- WBT output connectors
- hand assembled all aluminium modulated chassis
- engraved 3/8" thick aluminium front panel (standard black finish, optional silver)
- extensively used computer numeric control machines (CNC)
 

Specification are subject of change without notice