Channel D Lino C 3.0 Mode d’emploi

Channel D Lino C 3.0

Balanced Transimpedance Direct-Coupled Wide Bandwidth

Low Distortion Low Noise Precision Phono Preampliﬁer

For Low Output Moving-Coil Phono Cartridges

Optional Moving-Magnet and Voltage-Mode MC Inputs

Installation and Use Manual

QUICK START

1. Allow your Lino C to fully acclimate to ambient temperature

for a few hours before removing it from the inner plastic bag.

2. Current mode phono preampliﬁers use balanced input wiring.

Balanced wiring consists of a twisted pair of two independent

conductors inside a shield, for a total of three independent

conductors. Current mode phono preamps may exhibit audible

hum with unbalanced (coaxial conductor with shield) wiring.

RCA to XLR adapters* may be usable, but a properly wired*

balanced interconnect is needed to guarantee no audible hum.

*XLR pin 1 must be connected only to the cable shield; for adapters, pin 1 left open / not connected

3. Unmodiﬁed Rega turntables and tonearms cannot be connect-

ed to balanced preampliﬁers because Rega connects the chassis

ground to a cartridge signal connection, preventing making a

balanced signal connection, resulting in noise and hum.

4. Connect the turntable and output connections. Connect the

power adapter to your Lino C. The barrel connector of the

power adapter will easily slide into the power input jack on the

rear of your Lino C. If it seems to not slide in easily, verify the

alignment of the plug and try again. It can be damaged by using

excessive force. Next, plug the line cord into utility power.

5. A blue indicator on the bottom of the chassis will illuminate

when the circuitry is powered.

6. Keep your Lino C continuously connected to utility power for

optimum battery life; the internal Class A biasing circuitry also

takes approximately 30 minutes to fully stabilize after a power

down.

7. Disconnect the power adapter from the rear of the Lino C to

fully power down the Lino C.

Channel D Lino C 3.0 Installation and Use Manual

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Table of Contents

Page

Getting Started 2

Signal Connections 3

Optional Moving Magnet Input 4

Optional Voltage-Mode Moving Coil Input 5

Power Up 6

Power Down 6

About the Lino C Rechargeable Battery Power Supply 6

“Off the Grid” (OTG) Mode 7

Lino C Configuration Bottom Chassis Cover) Gain / Damping 8

Battery Power Supply Auxiliary Settings 10

Optional signal conditioning settings and inputs:

16 Hz High Pass Filter, MONO, POLARITY 11

Charging / “On Grid” Signal Port 12

AGM Rechargeable Battery 13

Opening the Lino C Chassis / Removing the Lid 16

Specifications 18

APPENDICES

Sample RIAA Accuracy Graph 19

Troubleshooting 20

Lino C Galvanic Isolation Block Diagram 23

Battery Circuit Board Description 24

Using an IoT Relay for Automation of Off The Grid Mode 26

Page 1

Congratulations on purchasing a Lino C phono preampliﬁer! Your Lino C is a low noise, low

distortion, balanced transimpedance (current mode) design featuring a wide frequency bandwidth and

extremely accurate RIAA de-emphasis. This provides you with the key to obtaining stunning and lifelike,

three-dimensional music reproduction from your LP records.

Your Lino C is speciﬁcally designed to deliver extremely high quality music reproduction from low

output moving-coil cartridges (and moving magnet cartridges, with the optional MM input).

Lino C incorporates newly available power supply components that enable circuit design strategies

delivering power supply performance very closely approaching that of our ﬂagship Seta® rechargeable-

battery phono preampliﬁers. Like our ﬂagship Seta models, modern manufacturing methods are used,

including low-noise, four-layer circuit boards and precision, surface mount components. Surface mount

components provide the shortest signal paths and highly optimized circuit layouts, with low stray

inductance, capacitance, improved unit to unit consistency and performance all eclipsing old-fashioned

through-hole designs. The result is a phono preampliﬁer with exquisite performance far exceeding

expectations, especially considering its relatively modest price in the arena of most high end components.

The high precision (guaranteed better than ± 0.1 dB) RIAA EQ accuracy provides standard RIAA-

corrected phono preampliﬁer outputs with outstanding quality.

The low impedance AGM battery based power supply with proprietary Channel D - developed charging,

maintenance and galvanic isolation circuitry provides outstanding “off the grid” isolation from power

supply related noise and interference issues that preampliﬁers with conventional power supplies must

contend with.

Lino C also is perfect as a preampliﬁer for connecting to high resolution (192 kHz / 24 bit), balanced-

input analog to digital converters (ADCs). The Lino C’s selectable Flat output used in conjunction with

Channel D’s Pure Vinyl™ software providing RIAA EQ correction combines the strengths of the latest

cutting-edge analog and digital technologies, delivering superb, high deﬁnition transparent vinyl

playback.

The beneﬁt of having the availability of selectable Flat and RIAA outputs can facilitate linking analog LP

playback with the performance and ﬂexibility of high resolution digital audio, should you desire to do so

later in the future.

Page 2

Getting Started

Please take the time to read this Installation and Use Manual to familiarize yourself with the installation

and operation of your Lino C.

Important: If the package you received from your shipper is substantially above or below ambient

temperature, please allow your Lino C to acclimate at room temperature for a few hours before opening

the plastic bag containing your Lino C, to avoid causing condensation on cold internal surfaces (if colder

than ambient temperature), and to allow the internal battery to come to temperature equilibrium for

optimal operation.

The following items are included. Please check the package and notify Channel D of any discrepancy:

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Before making any input signal connections, disconnect the power supply from the rear of the Lino C.

If using Channel D Pure Vinyl™ software: be sure to mute the Pure Vinyl application software, if running on the

computer, or otherwise mute or power down your power ampliﬁer(s) while making signal connections, to avoid

generating noises which could damage loudspeakers.

Lino C 3.0 rear panel shown above with optional Moving Magnet and Voltage Mode Moving Coil Inputs

MC Transimpedance Input (also applies to optional Voltage Mode input)

•The Lino C MC transimpedance input requires balanced (shielded twisted pair, which is two

conductors inside a shield for a total of three independent conductors; as contrasted with coaxial

unbalanced cable which is one conductor plus a shield) connections to the turntable. Turntables

with RCA jacks can be used with an RCA to XLR cable.

Important: Pin 1 of the XLR connector must not be connected to either of the signal

conductors, or hum/noise/distortion will result. Pin 1 should only be connected to the cable

shield. If you detect any hum/noise/distortion please detach and check your input connection

cable using a continuity tester or ohmmeter to insure that Pin 1 of the XLR is not internally

connected to Pins 2 or 3.

Balanced cable and signal connections provide better noise immunity (because of common mode

noise rejection) than conventional shielded (single conductor plus coaxial shield) cable. They are

also a requirement for a current mode preampliﬁer, or hum/noise/distortion will result.

Page 3

Standard Transimpedance Input (and Shared Outputs for Optional Inputs)

Signal Ground

•Securely connect the ground wire from the turntable / tonearm (if so equipped) to the binding post

on the rear panel of the Lino C. This terminal is connected to circuit common. It is not connected

to the chassis, which is ﬂoating in a Faraday cage conﬁguration. If your turntable doesn’t have a

grounding connection, leave this terminal disconnected. Important: only connect the ground to a

turntable chassis or ground wire, not to a ground connection on any other equipment.

Chassis Ground

•The Chassis Ground is not normally used, however it is provided in response to requests to

facilitate connecting the common terminal of a third-party power conditioner.

Balanced Outputs

•The low impedance, balanced XLR outputs are conﬁgured by the factory to supply conventional

RIAA corrected output.

The balanced outputs also can be conﬁgured to bypass the RIAA EQ for connection to the

balanced inputs of a professional audio interface, for use with Channel D’s Pure Vinyl™ software

(for Mac computers) for applying RIAA compensation. (Consult the Pure Vinyl software User

Guide for more information.)

If necessary, XLR output pin 3 may safely be connected to circuit common / ground (Pin 1),

because the Lino C has servo balanced (ground sensing) outputs.

Single-Ended Outputs

•The single-ended / unbalanced outputs supply conventional RIAA corrected output for use with

single ended / unbalanced outputs for a line preampliﬁer lacking balanced inputs. This corresponds

to a standard phono preampliﬁer (with RIAA EQ curve) output signal.

The RCA phono outputs are true, single ended (unbalanced) connections derived by differentially

summing the balanced signal “legs,” rather than taking the unadvisable shortcut of only using the

positive polarity signal leg of the balanced circuit, which would deliver poor performance.

Also, the standard RIAA EQ compensated signal appearing on the RCA output connectors is

generated from a signal side chain independent of the XLR / balanced outputs, and may be used

simultaneously with the XLR outputs without compromising the performance of the Lino.

Note: the Balanced and Single-Ended outputs are on separate signal chains, and may be used simultaneously.

Page 4

Optional Moving Magnet Input

Signal Inputs

•The Moving Magnet inputs are balanced, but use RCA input connectors. Input cables can be

standard unbalanced coaxial cables, or balanced, shielded twisted pair. If using shielded twisted

pair balanced cable, note that the capacitance can be 40 - 50 pF per foot, and this would need to be

added to the capacitive load switch settings.

To conﬁgure the input for Unbalanced, set the UNBAL switch setting for each channel to on.

Cartridge Loading

•Adjust capacitive loading with the switches. Intermediate settings are available by combining the

settings. The capacitances are additive. For example, selecting the 100 and 47 pF settings the

resulting capacitance is 147 pF.

With all capacitive loading settings disabled, the background capacitance is approximately 5 pF.

The minimum capacitive switch setting is 33 pF.

The ﬁxed load resistance is 47000 ohms.

Signal Ground

•Connect the ground wire from your turntable / tonearm (if so equipped) to the grounding lug. This

terminal is connected to circuit common. A removable banana plug is provided, with a set screw

for securing a ground lead terminated in a spade lug, otherwise a bare wire can be twisted around

the set screw and the screw tightened.

If your turntable doesn’t have a grounding connection, leave this terminal disconnected.

Important: only connect the ground to a turntable chassis or ground wire, not to a ground

connection on any other equipment.

Gain

•The input gain is 36 dB and can be increased via the Gain adjustment switches: 39 dB (+3), 42 dB

(+6) or 45 dB (+3 and +6) dB.

Page 5

Optional Voltage - Mode Moving Coil Input

Signal Inputs

•The Lino C second MC inputs are balanced, requiring balanced cables for optimal performance.

An internal jumper setting is provided to conﬁgure the input for Unbalanced operation; however

even when using a coaxial input cable, better results are usually obtained by keeping the input

conﬁgured for Balanced operation.

Cartridge Loading

•Adjust resistive loading with the switches. Intermediate settings are available by combining the

settings. Resistances combine geometrically. For example, selecting the 100 and 200 ohm settings,

the resulting resistance is 1 / ((1/100) + (1/200)) = 67 ohms. If selecting more switches, the same

principle follows. For example, selecting the 200, 500 and 750 ohm settings, the resulting

resistance is 1 / ((1/200) + (1/500) + (1/750)) = 120 ohms.

With all resistive loading settings disabled, the resistance is 1000 ohms.

Signal Ground

•Connect the ground wire from your turntable / tonearm (if so equipped) to the grounding lug. This

terminal is connected to circuit common. A removable banana plug is provided, with a set screw

for securing a ground lead terminated in a spade lug, otherwise a bare wire can be twisted around

the set screw and the screw tightened.

If your turntable doesn’t have a grounding connection, leave this terminal disconnected.

Important: only connect the ground to a turntable chassis or ground wire, not to a ground

connection on any other equipment.

Gain

•The input gain is 58 dB and can be increased via the Gain adjustment switches: 61 dB (+3), 64 dB

(+6) or 67 dB (+3 and +6) dB.

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