Topping L30 II NFCA Headphone Amp and Preamp Instruction Manual

L30 |1
NFCA HEADPHONE AMP

L30 II NFCA Headphone Amp and Preamp

Headphone amp/
Preamp application| Hi-Res Audio| 3 gain settings
---|---|---
NFCA
Modules| <0.00006%
THD+N| 144dB
DNR
<0.3uVrms *
Noise| <0.1Ω
Output Impedance| 3500mW x 2@16Q
560mW x 2@@3000 Maximum output power

• The actual noise level is obtained by boosting the noise of L30 Il by 100 times using a low noise amplifier in front of the APX555B then dividing the measured noise by 100 times.

What are the differences

| L30 II| L30
---|---|---
Amp| Improved NFCA| NFCA
THD+N| <0.00006%| <0.00007%
Dynamic Range| 144dB| 141dB
Output power at 300Q load| 560mW x2| 280mW x2
Gain| -14dB/0dB/16.5dB| -9.9dB/0dB/9.5dB
Output Voltage| 37Vpp| 26Vpp

Improved NFCA

L30Il uses redesigned NFCA (Nested Feedback Composite Amplifier) module. It provides 2x output power at 300Q load compared to L30.
The new circuit has 0.3uV ultra low noise and 144dB dynamic range as well as 0.00006% THD+N.

3500mW x2 | @16Q| | 2700mW x2
@32Q)| 2000mW x2
@64Q| 560mW x2
@300Q
---|---|---|---

Sound quality is never a problem
With the help of NFCA, L30 Il easily reach the top of the industry, and it has almost perfect performance regardless of distortion, dynamic range, and multi- tone testing.

Compatible with almost all kinds of headphones

L30 II’s output has high output voltage, high current, low output impedance, so no headphones that can’t be dealt with.
High output voltage can easily drive high impedance headphones; High output current allows low-sensitivity headphones to obtain enough power;
The low output impedance will not bring unnecessary effect on FR when driving low-impedance headphones.
Different headphones can be easily driven by the L30 II.

Low distortion while outputting high power

The L30Il can maintain ultra-low distortion output under high power load.
Under 32 ohm load and 2500mW output, the THD+N is lower than 0.00008%; under 300 ohm load and 300mW output, the THD+N is lower than 0.00007%.

Three gain settings to suit different needs

L30 Il has three gain options: -14dB, 0dB, 16.5dB. Improved gain settings can cover a wider range of needs to meet the needs of different headphones from low-sensitivity full-sized over-ears to high-sensitivity IEMs. With the help of extremely low noise 0.3uV, even IEMs will not hear any background noise.

E30 Il is the best DAC for L30 ll

Best combo for active speakers

We also recommend that L30Il and E30Il be used with active speakers.
Connect the two outputs of L30Il to headphones and active speakers. By switching the outputs of L30Il, you can enjoy music on headphones and active speakers respectively. _esiimsemion,

1. Output switch
   Switch to PRE output(RCA output) or HPA output(Headphone output), or turn off.

2. Gain switch
   H/ M /L respectively corresponds to 16.5dB / 0dB / -14dB

3. Power indicator
   The light will be always on when the L30 Il is turning on, and goes off when it is turning off, blinks to indicate unexpected output.

4. 6.35mm headphone output jack
   Suitable for headphones with 6.35mm jack

5. Volume knob
   Used to adjust the volume. It is recommended to turn down the volume before playing music.

6. Right channel single-ended RCA input

7. Left channel single-ended RCA input

8. Right channel single-ended RCA output

9. Left channel single-ended RCA output

10. Power input
    AC15V/1A 50Hz/60Hz

Contents list

1. L30II
2. AC adapter
3. 6.35 mm to 3.5 mm adaptor
4. USER Manual
5. Warranty card

Spec

L30 II Headphone Amplifier specifications

THD+N @1kHz (A-wt)| <0.00006% @Output=500mW (320)
<0.00005% @Output=80mW (3000)
THD @20-20kHz 90kBW| <0.00008% @Output=500mW (320)
<0.00007% @Output=80mW (3000)
SNR @MAX OUT 1kHz (A-wt)| 144dB
Dynamic Range @1 kHz (A-wt)| 144dB
Frequency Response| 20Hz-40kHz (±0.05dB)
Output Level| 14Vpp @G=L
31Vpp @G=M
37Vpp @G=H
AP measured noise level (A-wt)| <0.7uVrms @G=1
<0.7uVrms @G=M
<1.5uVrms @G=H
Actual noise level* (A-wt)| <0.3uVrms @G=1
<0.3uVrms @G=M
<1.4uVrms @G=H
Channel Crosstalk @1kHz| -92dB
Input sensitivity| 25Vrms @G=L
11.2Vrms @G=M
2.0Vrms @G=H
Gain| -14.0dB @G=L
OdB @G=M
16.5dB @G=H
Output Impedance| <0.10
Output Power| 3500mW x 2 ©160 THD+N<0.1%
2700mW x 2 @320 THD+N<0.1%
2000mW x 2 @640 THD+N<0.1%
560mW x 2 @3000 THD+N<0.1%
Load Impedance| >80

*Note:

1. The above data is the result of the testin TOPPING laboratory under AC220V 50Hz condition.
2. The actual noise level is obtained by boosting the noise of L30 Il by 40dB using a low noise amplifier in front of the APx555B then dividing the measured noise by 100 times.

L30 II Pre-amplifier specifications

THD+N @1kHz (A-we| <0.00006%
THD @20-20kHz 90kBW| <0.00007%
SNR @MAX OUT 1kHz (A-wt)| 144dB
Dynamic Range @1kHz (A-wt)| 144dB
Frequency Response| 20Hz-40kHz (t0.05dB)
Output Level| 14Vpp @G=L
31Vpp @G=M
37Vpp @G=H
AP measured noise level (A-we| <0.7uVrms @G=L
<0.7uVrms @G=M
<1.5uVrms @G=H
Actual noise level* (A-we| <0.3uVrms @G=1
<0.3uVrms @G=M
<1.4uVrms @G=H
Channel Crosstalk @1kHz| -92dB
Input sensitivity| 25Vrms @G=L
11.2Vrms @G=M
2.0Vrms @G=H
Gain| -14.0dB @G=L
OdB @G=M
16.5d8 @G=H
Output Impedance| 200

*Note:

1. The above data is the result of the testin TOPPING laboratory under AC220V 50Hz condition.
2. The actual noise level is obtained by boosting the noise of L30 Il by 40dB using a low noise amplifier in front of the

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