Introduction:

This product refers to the treble and bass adjustment part of the UK NAD3020 power amplifier, The circuit adopts single-ended class A amplification, and the amplifier tube adopts Japanese original high magnification. (HFE300+): SA992/2SC1845 audio dedicated pair tube. The latter two pairs use B647/D667 audio dedicated pair tubes, The voltage regulator circuit uses a new LM317/337 high-precision low-noise voltage regulator IC. The biggest feature of this treble and bass adjustment is to adjust the high and low frequencies. Change, full of low frequency elasticity! The high frequency is slender and not harsh! The mellow tone is very durable! The effect is not comparable to the tone of the op amp. Treble and bass adjustment range: bass +-15DB, treble +-10DB.

Parameter:

Input voltage: AC 24V--0--24V

GAIN: 8dB

Treble: +/-10dB

Bass adjustment range: +/-15dB

Potentiometer spacing: 40mm and 58mm (from left to right)

PCB Size: 138mm*81mm (L*W)

NOTE: We have DIY kit or finished board (Optional)

◆ DIY kit ---- All parts need you to solder and test it. (No potentiometer)

◆ Finished board ---- All parts have been welded and tested OK.  (With A50K potentiometer)