iDefender+ - Audio accessory iFi Audio - Free user manual and instructions

Type	Audio Accessory (Phono Preamp)
Model	iDefender+
Brand	iFi Audio
Input Voltage	15V DC, 1.2A (with iPower X 15V)
Power Supply	AC 100-240V, 50/60Hz (via iPower X)
Frequency Response	10Hz – 100KHz (±0.3dB); 20Hz – 20kHz (±0.2dB)
Dynamic Range	MM: >108dB (A-weighted); MC: >106dB (A-weighted)
Signal-to-Noise Ratio	MM: >85dB (A-weighted re. 5mV); MC: >85dB (A-weighted re. 0.5mV)
Crosstalk	< -71dB (1kHz)
Max Undistorted Output	7V (Load ≥ 600Ω, THD ≤1%)
THD	< 0.005% (MM 36dB 1V out 600Ω Load)
Output Impedance	< 100Ω
Power Consumption	< 5W
Dimensions	178 x 64 x 26 mm (7.0 x 2.5 x 1.0 inches)
Weight	265 g (0.58 lbs)
Warranty	12 months
Inputs	MC (≤1mV), MM (>1mV)
Outputs	RCA analogue, Ground terminal
EQ Curves	RIAA, eRIAA, IEC, eRIAA+IEC, Decca, Columbia
Gain Options	36.72dB (ultra wide)
Amplifier Type	Direct-coupled, servoless Class A TubeState
Capacitors	Nichicon audio-grade, ELNA Silmic II, Panasonic OSCON
Opamps	High performance JFET opamps, hand-matched ultra-low noise bipolar transistors
Indicators	Ready, Class A TubeState, Power on LEDs

Frequently Asked Questions - iDefender+ iFi Audio

What is the input voltage for the iDefender+?

The iDefender+ requires a 15V DC power input. For best performance, use the included ultra-low noise iPower X 15V power supply.

How do I select the EQ curve?

Use the EQ Curve Selection switch on the device. There are six curves: RIAA, eRIAA, IEC, eRIAA+IEC, Decca, and Columbia. Adjust according to your LP's EQ curve.

What are the different EQ curves and when should I use them?

- Columbia: For most Columbia/CBS, Epic, EMI records originally issued under Columbia (pre-1980). - RIAA: Standard for records after 1980s and some after 1950s. Includes four variants. - Decca: For most Decca, London, DG, Archiv, EMI, Argo, NAB (pre-1980). Use if LP sounds overly bright. - Use Columbia if an LP sounds both too bright and with muddy overblown bass.

How do I connect the ground wire?

Connect the ground terminal of the iDefender+ to the turntable's grounding wire to reduce hum.

What are the settings switches on the underside?

The settings switches adjust gain, load, and EQ curve settings. Adjust them according to your preference, turntable's specifications, and LP's EQ curve.

What is the warranty period?

The warranty period is 12 months.

What are the dimensions and weight?

Dimensions: 178 x 64 x 26 mm (7.0 x 2.5 x 1.0 inches). Weight: 265 g (0.58 lbs).

What type of capacitors are used?

The device uses Nichicon audio-grade power supply capacitors, ELNA Silmic II capacitors, and Panasonic OSCON aluminum polymer capacitors.

What is the output impedance?

The output impedance is less than 100Ω.

What is the power consumption?

The power consumption is less than 5W.

USER MANUAL iDefender+ iFi Audio

1. DC 15V Power input

The iPhone3 Black Label must ONLY be powered by 15 volts.

Tip: For best performance, use the included ultra-low noise iPower X 15V power supply.

2. EQ Curves Selection

This is the EQ curves selection switch.

Tip: For best performance switch to the setting most suited to your LP's EQ curve.

3. RCA analogue output

This is an analogue output.

4. MC input

This is a MC input suitable for MC cartridges to an output voltage ≤1mV.

5. Ground

This is iPhone3 Black Label's ground, please connect it to the turntable's grounding wire.

6. Settings Switches

The settings switches are located on the underside of iPhone3 Black Label.

Tip: For best sound performance adjust the gain, load and EQ curve settings in accordance with your preference, turntable's specifications and LP's EQ curve.

Tip: EQ Curves

Columbia*: most Columbia/CBS, Epic, EMi (records originally issued under Columbia) etc.

RIA: standard EQ curve for all records issued after 1980s and some after 1950s. There are four different types of RIAA EQ available, e.g. eRIAA, IEC, RIAA, eRIAA+IEC. Adjust it via the micro switches located on the underside of iPhone3 Black Label.

Decca*: most Decca, London, Deutsche Grammophon (DG), Archiv, EMI, Argo, NAB etc.

* For pre-1980 records

If an LP sounds overly bright, edgy, thin and lacking scale and body via RIAA EQ, please try Decca EQ.

If an LP sounds both too bright and with muddy overblown bass, please try the Columbia EQ.

Tip: For further guidelines please see the enclosed instructions or go to our website https://ifi-audio.com/iphono-calculator/

7. MM input

Suitable for MM and high-output MC cartridges with an output voltage >1mV.

8. LEDs

Ready

Class A TubeState ^35 in operation

Power on

Technologies

• 6 x EQ curves: RIAA/eRIAA/IEC/eRIAA+IEC/Decca/Columbia
  • Ultra wide gain options: 36.72dB
• Direct-coupled, servoless Class A TubeState amplifier
  • Nichicon audio-grade power supply capacitors
  • ELNA Silmic II capacitors, Panasonic OSCON aluminum polymer capacitors
  • High performance JFET opamps
  • Hand-matched ultra-low noise bi-polar transistors

Specifications

Input voltage: 15V/1.2A, AC 100-240V, 50/60Hz (with iPower X)

Frequency response: 10Hz – 100KHz (±0.3dB) 20Hz – 20kHz (±0.2dB)

Dynamic range: MM(36dB): >108dB (A-weighted) MC(60dB): >106dB (A-weighted)

SNR: MM(36dB): >85dB (A-weighted re. 5mV) MC(60dB): >85dB (A-weighted re. 0.5mV)

Overload margin: MM(36dB): >26dB (re. 5mV, @ 1% THD) MC(60dB): >22dB (re 0.5mV, @ 1% THD)

Crosstalk: <-71dB(1kHz)

Max undistorted output: 7V (Load ≥ 600Ω, THD ≤1%)

THD: <0.005% (MM 36dB 1V out 600Ω Load)

Output Impedance: <100Ω

Power consumption: <5W

Dimensions: 178 x 64 x 26 mm

7.0^× 2.5^× 1^

Weight: 265 g (0.58 lbs)

Warranty period: 12 months

Specifications are subject to change without notice.

ifi-audio.com

Ver1.1