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Coffman Labs, LLC www.coffmanlabs.com
Inputs: 5-position Selector Switch:
Phono, Mute, S1, S2, or S3 selected at Front Panel
Phono: Rear Panel Switch selects type:
Mute: Shorts all inputs plus REC Out
S1 & S2: 100k input impedance
S3:
Outputs: 5-position Selector Switch:
Out: (inverted) Direct output via Headphone jack
Note: Rear Panel Main outputs are disabled.
Low: (non-inverted) Selects Headphone jack (*32-100 Ω)
Hi: (non-inverted) Selects Headphone jack (*100-300 Ω)
Off: Shorts all outputs
On: (inverted) Selects Rear Panel 'Main' output jacks
-Output impedance: 600 Ω 'Out 1' and 1000 Ω 'Out 2'
[Rear Panel REC Out (non-inverted) always present]
Gain:
Phono to REC OUT jack: MM=36 dB : MC = 52 dB
Max Phono Gain (Line out): MM=60.5 dB : MC = 76 dB
Line level output maximum undistorted: +14 dB
Max Headphone power: ½ watt at 32 Ω, ¼ watt at 300 Ω
Tube Complement:
2 X 12AX7 / ECC83 (RIAA Section)
2 X 12AU7 / ECC82 (Phono Boost)
2 X 5687 (Line Stage Output)
1 X 5AR4 (Power Supply)
*
Let your ears be the judge—try both settings.
SPECIFICATIONS
MM1 selectable impedance 47K / 70K / 95K
MM2 (95k) or MC based on purchase option
10K input impedance
10
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