L30 |1
NFCA HEADPHONE AMP
Contents
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,
- Output switch
Switch to PRE output(RCA output) or HPA output(Headphone output), or turn off. - Gain switch
H/ M /L respectively corresponds to 16.5dB / 0dB / -14dB - 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. - 6.35mm headphone output jack
Suitable for headphones with 6.35mm jack - Volume knob
Used to adjust the volume. It is recommended to turn down the volume before playing music. - Right channel single-ended RCA input
- Left channel single-ended RCA input
- Right channel single-ended RCA output
- Left channel single-ended RCA output
- Power input
AC15V/1A 50Hz/60Hz
Contents list
- L30II
- AC adapter
- 6.35 mm to 3.5 mm adaptor
- USER Manual
- 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:
- The above data is the result of the testin TOPPING laboratory under AC220V 50Hz condition.
- 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:
- The above data is the result of the testin TOPPING laboratory under AC220V 50Hz condition.
- The actual noise level is obtained by boosting the noise of L30 Il by 40dB using a low noise amplifier in front of the
