Amplifier 擴音機 / MANLEY / Steelhead RC Phono Stage
Steelhead RC Phono Stage

We debuted to the world a killer frikkin' cool phono stage at CES 2001. It was called, aquatic naming theme continuing, The Steelhead®, as it is an "upstream" device and has a very clever MC variable load auto tranny that Mitch Margolis (on-staff Manley h

Introduction

It has two Moving Coil inputs with selectable impedance load 25, 50, 100, 200 and 400 Ohms via Mr. Clever "Steelhead" transformer/autoformer. It also has variable and selectable Moving Magnet input impedances too 25, 50, 100, 200 Ohms and 47 kOhms. Very nifty is the selectable-dial-able-in-able-from-the-faceplate-able capacitive loading for all three of the MM & MC inputs 0 to 1100 picofarads in 10 picofarad steps. Very cool! Equalize baby! TEN picofard steps! Wow! Now you can really dial this in for perfect cartridge matching with ZERO penalty. None of this switching detracts from the sound quality or adds any extra anything to the signal path. Rest assured.

Specification

MANLEY STEELHEAD® RC PHONO STAGE


Vacuum tube complement: 6922 SOVTEK Russian x 2 (gain) plus JAN NOS GE 7044 or 5687 x 4 (output buffers)
Fuse type and ratings @ 117 VAC operation: 1.5 Amp 3AG slow-blow mains fuse 0.5 Amp 3AG slow-blow logic fuse
Fuse type and ratings @ 230 VAC operation: 0.75 Amp 3AG slow-blow mains fuse 0.25 Amp 3AG slow-blow logic fuse
Moving Magnet input impedance: 5-step user adjustable via fixed low-noise resistors. 25, 50, 100, 200 and 47000 Ohms.
Moving Coil input impedance: 5-step user adjustable via multi-tap autoformer: 25, 50, 100, 200 and 400 Ohms.
Input Termination Capacitance: Front Panel Selectable in 10 picofarad steps from 10 to 1100 pF (1.1nF) Residual input capacitance less than 40 pF.
Gain: 4-step user adjustable, 50, 55, 60 and 65 dB active gain at 1 kHz referred to the FIXED output jack into a 10 kOhm load. Additional gain available via the MC input's step-up autoformer. See Owner's Manual for discussion.
Deviation from RIAA curve: Less than +0.5 / -0.3 dB from 20 Hz to 20 kHz at any gain setting. Typically less than ±1 dB from 10 Hz to 100 kHz
Inter-channel differential phase: Less than 4 degrees from 20 Hz to 20 kHz at any gain setting. Typically less than 2 degrees.
Inter-channel differential gain: Less than ±0.5 dB from 20 Hz to 20 kHz at any gain setting.
Dynamic Range: 101 dB @ 1 kHz, 1% THD measured with 200 Ohm source, 47 kOhm input, @ 55dB Gain 97 dB @ 1 kHz, 0.1% THD
THD: 0.0042% at 1V output @1kHz
REMORA RF REMOTE: controls motorised volume control up/down functions; uses 9v battery
Maximum LINE input level: +30.6dBu @ 1KHz for an output of +29.3dBu @ 0.07% THD 26.5Vrms @ 1KHz for an output of 22.8Vrms @ 0.07% THD
Maximum Output: +27dBm @ 1KHz with 3% THD into 100 kOhm load
FIXed Output impedance: 150 Ohms. Minimum suggested load greater than 1500 Ohms.
VARIable Output impedance: 75 Ohms. Minimum suggested load greater than 600 Ohms.