ESOTERIC SOUND Re-Equalizer Bedienungsanleitung

Cylinder records ALL FLAT FLATDecca (US) (pre 1946) 78 300 FLAT(1946 - 1954) 78 629 -12(Up to MG4400) (with raised matrix) 33 800 -8Decca – alternate

Epic 33 LP -16Epic – alternate (Until 1954) 33 RIAA -16Esoteric (ES500, 517, EST5, 6) 33 400 -12 (E2KP to 9607) RIAA -12European 78s (General) 78

London (Pre 1944) 78 300 FLAT FFRR (1944) (<DR8485-2) 78 300 -5 FFRR (After June 1950) 33 RIAA FLAT (>ARL1186-1B) 33 RIAA -10

Overtone – alternate 33 RIAA -16Oxford 33 LP -16Pacific Jazz (1 - 13) 33 400 -12Parlophone1925 - 1953 78 300 FLAT1949 - 1953 33 RIAA FLATParlophone –

Telefunken 78 400 -5Tempo 33 RIAA -16Transcriptions (Many pre-WWII) 33/78 RIAA FLAT(Old vertical-cut) 33 300 -5(NAB vertical-cut) 33 400 -16Transradi

A TABLE OF CORRESPONDENCESTURNOVERFLAT150 Hz200 Hz250 Hz = FFRR (1949)300 Hz = FFRR (1951)400 Hz = AES450 Hz = LP = FFRR (1953)500 Hz = RIAA = NAB629

LEFTINPUTR147KR2 10K56784R3R4200K-6V+6VR5 10KS1A12345C1C2100nFR10R11200K56784+6V-6VR12 1000123456RUMBLEFILTERTO LEFTR1347KRIGHTINPUTR14 10K321

R30 1740R31 1740P7 H7R295000P8 H8R295000Fig. 2 -- Rumble filters, gain control and output selector switchC25100nF 100nFC26R25120KR26160K100nFC2710

+6VR38 15.4KC322200pF680 pFC33567R39 2870 R40 19.6KC343300pF220 pFC353214C40100 nF++--R41 15.4KC362200pF680 pFC378R42 2870 R43 19.6KC383300pF220

INCOMOUTCOMINOUT78L06TOP79L06TOPFig. 4 -- Model 408A phono preamplifier power supplyC502200uFR50604C511000uFC52100nFC531000uFC54100nFR52 1240P10TO L

MODEL 408A – OPERATIONThe model 408A is designed for moving magnet (MM) cartridges only.To operate the preamp connect your turntable output cables to

Parts ListModel 408A Stereo Phono PreamplifierQUANTITY REFERENCE VALUE DESCRIPTION MANUFACTURERMAIN408A.PCB2 R1, R13 47K 1%, 1/4 w, metal film4 R2, R5

4 U1, U2, U3, U5 OPA2227PA Dual opamp, 8-pin DIP1 U4 OPA4227PA Quad opamp, 14-pin DIP2 H1, H8 3-pin male header Molex 22-03-20314 H2, H3, H4, H5 7-pin

1 Cast aluminum enclosure Hammond type 1590A4 Stick-on rubber bumpers DigiKey SJ5523-02 Knob for S1, S2Misc hardware, wire and shrink tubing1 Wall DC

CIRCUIT BOARD TOP VIEWPLACE JUMPERSHERE FOR60 dB GAINPLACE JUMPERSHERE FOR56 dB GAINPLACE JUMPERSHERE FOR52 dB GAINSET ALL FOUR JUMPERS THE SAME.

Frequently Asked Questions – Model 408 (and 408A)The 408 arrived Monday, and I've had some time to play with it. It sounds great - nice and quiet

MODEL 408A – HOW DOES IT WORK?In Figure 1, the dual, low-noise opamps (U1 and U2) provide all the preamp gain and frequencyresponse shaping with the R

PHONOGRAPH EQUALIZATION SETTINGSThe following TABLE provides suggested starting values for playback equalization of monorecordings. Don’t be afraid

Arizona (until 1955) 33 400 -12Artist 78 RIAA -16Atlantic 33 RIAA -16Audiophile 33 RIAA -1278 400 FLATAutograph (Marsh Electrical) 78 1000 FLATAudio F

(1001 - 1022) 33 629 -16Canyon (up to C6160) 33 400 -12Capitol (<1954) 78 800 -10Capitol (1942) – alternate 78 400 -12 (<1954) 45 800 -12 (FDS)