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AMR PH-77


Hybride MM/MC Phono Stage



    

“The only Phono Equaliser to unlock the full potential your vinyl system.”

After years of extensive in-house development and close collaboration with recording engineers and archivists from the BBC, the British Library Sound Archive, the Institut fur Rundfunktechnik GmbH and Sveriges Radio AB, the result is the AMR Reference Class PH-77 Phono Equaliser. 

The PH-77 is the only phonograph source able to lay claim to exclusively feature a comprehensive catalogue of 22 equalisation (EQ) curves: every LP record can now be replayed using the one and only correct equalisation curve. 

This along with 8 levels of gain, 64 steps of load, 3 inputs for unprecedented flexibility in cartridge choice and matching and the onboard 24bit/96kHz Analogue-to-Digital converter, the PH-77 is undeniably one of the most significant reference phonograph sources ever produced. 

With unorthodox approaches to the circuit design, using rare and primarily bespoke components, AMR’s PH-77 Phono Equaliser paints a sonic picture that is so seductively vivid, beautiful and harmonically rich, that it possesses an enthralling live performance-like quality that after listening, one is left struggling for superlatives.

Gain: MC Lo: 72, 66, 60, 54dB; MM/MC Hi: 48, 42, 36, 30dB + Mute 
Frequency Response: ± 0.3dB of RIAA; 12Hz to 95kHz +0.3/-3dB 
Noise 'A' weighted: < -145dBV (< 0.056uV) equivalent input noise
Inputs: 1 x Direct Input with custom loading RCA socket, 3 x Switchable Input
Polarity: Non-inverting 
Output Impedance: RCA < 200 ohm, XLR < 400 ohm 
Outputs: 1 x RCA, 1 x XLR, 1 x USB 
Analogue to Digital converter: 24bit/96kHz** (for archival of vinyl onto a PC) 
Tube Complement (6): Mullard ECC81/12AT7 x 2; Philips 5687WB x 2; New Old Stock EZ80 x 2 (power rectification) 
Display: Vacuum Fluorescent Display, Dot Matrix, 5 level adjustable including OFF 
Dimensions: 46cm W x 16cm H x 47cm D 
Weight: 28kg (net) 

Equalisations (Stereo): 
- RIAA
- Enhanced RIAA (with Vinyl Cutting Lathe HF Roll-Off and Phase-Shift Compensation)
- Decca FFSS (also London Records stereo and NAB stereo LPs)
- Columbia
- CCIR (Europe pre ~1962, Eastern Europe & Asia pre ~1975)

Equalisations (Mono): - RIAA (Mono, also RCA Orthophonic)
- Enhanced RIAA (Mono, with Neumann Cutter HF Roll-Off Compensation)
- Columbia 52 (later Columbia LP Mono)
- Columbia 48 (early Columbia LP Mono)
- Columbia 38 (78rpm, Columbia Electrical post-1938)
- Decca FFRR 53 (also London Records post-1953)
- Decca FFRR 52 (also London Records 1952)
- Decca FFRR 51 (also London Records 1951)
- Decca FFRR 49 (also London Records 1949-1951)
- RCA 50 (RCA, Urania, Lyrichord)
- RCA 38 (78rpm, RCA Electrical post-1938)
- AES 51 (1951 AES Standard)
- Bartok LP
- NAB (1942 also NARTB)
- EMI (early EMI Mono LP)
- CCIR 56 (Mono, Europe pre ~1962, Eastern Europe & Asia pre ~1975) 
- CCIR 53 (Europe pre-circa. 1956)
Selecting a Mono EQ curve automatically switches the PH-77 into Mono Mode. 

Load: 
- MC(ohm): 47, 48, 50, 52, 54, 56, 58, 60, 63, 66, 69, 72, 75, 80, 85, 90, 95, 100, 110, 120, 130, 140, 160, 180, 200, 250, 300, 350, 500, 750, 1.5K, 47K
- MM(pF): 70, 90, 110, 130, 145, 165, 185, 200, 220, 240, 260, 280, 300, 315, 330, 350, 370, 390, 410, 430, 445, 460, 485, 500, 520, 540, 560, 580, 600, 620, 640, 680 





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