A1 Pre-stage NE5532 Version Tone Board Double AC12V~18V Power Supply
83
Direct purchase from the factory 
Tuta Solutio
Donum Gratis
Politica Missilis
Politica ReditusDonum Gratis
Salve ad Roymall, tuum destinatum ad dona premium. Gratias agimus pro tuo auxilio, et offerimus donum gratis cum omni emptione. Paratus ad explorandum nostram collectionem? Perlege nostra selectio, fac ordinationem tuam, et expecta donum tuum gratis cum emptione.Politica Missilis
Processamus ordinationes intra 2 dies.Norma missilis tempus est 5-7 dies laboris.Tempus missilis potest variari secundum destinationem.1. Politica Reditus
Accipimus solum res emptas ex roymall.com. Donum gratis non potest reddi. Res debet esse non usata et in originali packaging.Processamus reditus intra 3-5 dies laboris post receptionem.Res personalisatae non possunt reddi.Contacta nos: service@roymall.com vel Whatsapp: +86193598494712.Politica Pecuniae Redditae
Accipies plenam pecuniam redditam post receptionem et inspectionem. Sumptus missilis non redditur.Contacta nos: service@roymall.com vel Whatsapp: +8619359849471
Product introduction:
Using A1"s preamp and volume control original circuit, it has the inherent advantages of easy assembly, good impedance matching and smooth sound quality. In terms of sound performance, it can broaden the sound field, increase dynamics, and enhance resolution. You can also change different dual op amps to adjust the sound trend according to your own preferences.
Most dual op amps can be used directly and can be directly exchanged for AD827N, OPA2604AP, OPA2132PA.
This circuit is divided into two stages, the first stage is responsible for buffering, and the second stage is used as feedback volume control
(Each op amp is responsible for one channel). Its characteristic is that the input impedance does not occur when the volume is adjusted
Variety.
The music fax A1 front-end line is very simple and good sound. The good sound lies in the negative feedback adjustment, but the potentiometer of the original A1 line to adjust the volume is in the feedback loop and acts as a feedback amplifier resistor, adjusting the gain to adjust the volume, but there is a feature The volume can"t be turned off, but the volume is still adjusted to the minimum.
Note: The coupling capacitor uses 100V1UF/105.
Working voltage: dual AC AC12V~18V, dual 12V transformer is recommended
Finished board size: 70*40*25=length*width*height (unit MM)
Net weight: 40g (within 5g error)
Package includes:
1 x NE5532 Version Tone Board
