Astell & Kern Music Players Spec Comparison
Highlights
1. The AK70 has:
- Cirrus Logic CS4398 x1 (Single DAC)
- 64GB internal memory
- DSD to PCM
- 24bit 192kHz Bit to Bit
- 32bit audio is downsampled using a sample-rate converter
2. The AK100 II has:
- a Single Cirrus Logic CS4398 DAC (converts DSD playback to PCM)
- lower output from single ended & balanced output (1.7vrms single ended, 2.0vrms balanced)
- 64gb internal memory
- the body is not scratch resistant
- a 3150mah Li-Polymer battery
3. The AK120 II has:
- a Dual Cirrus Logic CS4398 DAC (converts DSD playback to PCM)
- same power output as the AK240 (2.1vrms single ended, 2.3vrms balanced)
- 128gb internal memory
- the body is not scratch resistant
- a 3250mah Li-Polymer battery
4. The AK240 has:
- a Dual Cirrus Logic CS4398 DAC with XMOS Sound Processor for Native DSD playback up to DSD128
- 256gb internal memory
- a duralumin scratch resistant body with real carbon fiber back plate
- a 3250mah Li-Polymer battery
- Native DSD Support
5. The AK300 has:
- AK4490's Single DAC-DAC
- 64GB internal memory
- DSD to PCM
- 24bit 192kHz Bit to Bit
- Femto Clock Delivers True Original Sound
6. The AK320 has:
- AK4490 x2 (Dual DAC)
- 128GB internal memory
- DSD to PCM
- 24bit 192kHz Bit to Bit
- 200 Femto Second VCXO Reference Clock
7. The AK380 has:
- AKM AK4490 x 2 (Dual DAC)
- 256GB internal memory
- Geared for the pro sound group and audiophiles who demand the very best.
- 32bit/384kHz Bit to Bit Playback
- 3 color options
8. The AK380SS has:
- Limited Edition Stainless Steel Package, Stainless Steel Player, Stainless Steel Amp, Van Nuys case
- AKM AK4490 x 2 (Dual DAC)
- 256GB internal memory
- 32bit/384kHz Bit to Bit Playback
- Native DSD Playback
AK 300 Series
| Model | AK380 | AK320 | AK300 |
|---|---|---|---|
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| Body Color | Meteoric Titan, Black & Copper, Stainless Steel | Gun Metal | Midnight Black |
| Body Material | Aircraft Grade Duralumin / Copper / Stainless Steel | Aluminum | Aluminum |
| Dimensions | 3.14” [W] x 4.42” [H] x 0.68” [D] 79.8 mm [W] x 112.4 mm [H] x 17.5 mm [D] |
2.95” [W] x 4.42” [H] x 0.64” [D] 75.15 mm [W] x 112.4 mm [H] x 16.45 mm [D] |
2.95 ” [W] x 4.42 ” [H] x 0.60 ” [D] 75.15 mm [W] x 112.4 mm [H] x 15.45 mm [D] |
| Weight | 7.68 oz. (218 g) | 7.65 oz. (217 g) | 7.23 oz (205 g) |
| Output Level | Unbalance 2.2Vrms / Balance 2.3Vrms(Condition No Load) | Unbalance 2.2Vrms / Balance 2.3Vrms(Condition No Load) | Unbalance 1.98Vrms / Balance 1.98Vrms (Condition No Load) |
| DAC | AKM AK4490 x 2(Dual DAC) | AKM AK4490 x 2(Dual DAC) | AKM AK4490 x1 (Single DAC) |
| Frequency Response | ±0.053dB (Condition: 20Hz~20kHz)Unbalanced & Balanced/ ±0.56.dB (Condition: 10Hz~70kHz) Unbalanced: / ±0.55.dB (Condition: 10Hz~70kHz) Balanced |
±0.053dB (Condition: 20Hz~20kHz)Unbalanced & Balanced / ±0.56.dB (Condition: 10Hz~70kHz) Unbalanced: / ±0.55.dB (Condition: 10Hz~70kHz) Balanced |
±0.075dB (Condition: 20Hz~20kHz) Unbalance & Balance ±0.56dB (Condition: 10Hz~70kHz) Unbalance / ±0.55dB (Condition: 10Hz~70kHz) Balance |
| Signal to Noise Ratio | 16dB @ 1kHz, Unbalanced / 117dB @ 1kHz, Balanced | 116dB @ 1kHz, Unbalanced / 117dB @ 1kHz, Balanced | 116dB @ 1kHz, Unbalance / 116dB @ 1kHz, Balance |
| Crosstalk | 130dB @ 1kHz, Unbalanced / 135dB @ 1kHz, Balanced | 130dB @ 1kHz, Unbalanced / 135dB @ 1kHz, Balanced | 130dB @ 1kHz, Unbalance / 130dB @ 1kHz, Balance |
| THD+N | 0.0008% @ 1kHz, Unbalanced / 0.0007% @ 1kHz, Balanced | 0.0008% @ 1kHz, Unbalanced / 0.0007% @ 1kHz, Balanced | 0.0008% @ 1kHz, Unbalance / 0.0007% @ 1kHz, Balance |
| IMD SMPTE | 0.0007% 800Hz 10kHz (4:1) Unbalanced/ 0.0006% 800Hz 10kHz (4:1) Balanced |
0.0007% 800Hz 10kHz (4:1) Unbalanced/ 0.0006% 800Hz 10kHz (4:1) Balanced |
0.0007% 800Hz 10kHz(4:1) Unbalance / 0.0006% 800Hz 10kHz(4:1) Balance |
| Output Impedance | Balanced out 2.5mm (1ohm) / Unbalanced out 3.5mm (2ohm) | Balanced out 2.5mm(1ohm)/ PHONES 3.5mm(2ohm) | Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm) |
| Clock Jitter | 30ps(Typ) / Reference Clock Jitter (VCXO Clock) 0.2ps (Typ) | 30ps(Typ) / Reference Clock Jitter 200 Femto Seconds | 30ps(Typ) / Reference Clock Jitter 200 Femto Seconds |
| Memory | Built-in : 256GB [NAND] / External : microSD (Max. 128GB) x 1 | Built-in : 128GB [NAND] / External : microSD (Max. 128GB) x1 | Built-in : 64GB [NAND] / External : microSD (Max. 128GB) x1 |
AK240, AK70 & AK100 Series
| Model | AK240 | AK120II | AK100II | AK70 |
|---|---|---|---|---|
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| Body Color | Gun Metal | Stone Silver | Smoky Blue | Misty Mint |
| Body Material | Aircraft Grade Duralumin | Aluminum | Aluminum | Aluminum |
| Dimensions | 2.59" [W] x 4.21" [H] x 0.68" [D] 66 mm [W] x 107 mm [H] x 17.5 mm [D] |
2.16" [W] x 4.64" [H] x 0.58" [D] 55 mm [W] x 118 mm [H] x 14.9 mm [D] |
2.16" [W] x 4.37" [H] x 0.58" [D] 55 mm [W] x 111 mm [H] x 14.9 mm [D] |
2.37" [W] x 3.81" [H] x 0.51" [D] 60.3 mm [W] x 96.8 mm [H] x 13 mm [D] |
| Weight | 6.5 oz (185 g) | 6.24 oz (177 g) | 5.99 oz (170 g) | 4.66 oz (132 g) |
| Output Level | Unbalance 2.1Vrms / Balance 2.3Vrms(Condition No Load) | Unbalance 2.1Vrms / Balance 2.3Vrms(Condition No Load) | Unbalance 2.0Vrms / Balance 1.7Vrms(Condition No Load) | Unbalance 2.3Vrms / Balance 2.3Vrms (Condition No Load) |
| DAC | Cirrus Logic CS4398 x2(Dual DAC) | Cirrus Logic CS4398 x2(Dual DAC) | Cirrus Logic CS4398 x1(Single DAC) | Cirrus Logic CS4398 x1 (Single DAC) |
| Frequency Response | ±0.023dB (Condition: 20Hz~20kHz) Unbalanced & Balanced / ±0.3dB (Condition: 10Hz~70kHz) Unbalanced & Balanced |
±0.023dB(Condition: 20Hz~20kHz) Unbalanced & Balanced / ±0.3dB(Condition: 10Hz~70kHz) Unbalanced & Balanced |
±0.025dB(Condition: 20Hz~20kHz) Unbalanced & Balanced / ±0.6dB(Condition: 10Hz~70kHz) Unbalanced & Balanced |
±0.075dB (Condition: 20Hz~20kHz) Unbalance & Balance ±0.56dB (Condition: 10Hz~70kHz) Unbalance / ±0.55dB (Condition: 10Hz~70kHz) Balance |
| Signal to Noise Ratio | 116dB @ 1kHz, Unbalanced / 117dB @ 1kHz, Balanced | 116dB @ 1kHz, Unbalanced / 117dB @ 1kHz, Balanced | 115dB @ 1kHz, Unbalance / 115dB @ 1kHz, Balance | 116dB @ 1kHz, Unbalance / 116dB @ 1kHz, Balance |
| Crosstalk | 130dB @ 1kHz, Unbalanced / 135dB @ 1kHz, Balanced | 130dB @ 1kHz, Unbalanced / 135dB @ 1kHz, Balanced | 127dB @ 1kHz, Unbalanced / 130dB @ 1kHz, Balanced | 130dB @ 1kHz, Unbalance / 130dB @ 1kHz, Balance |
| THD+N | 0.0007% @ 1kHz, Unbalanced / 0.0005% @ 1kHz, Balanced | 0.0007% @ 1kHz, Unbalanced/ 0.0005% @ 1kHz, Balanced | 0.0009% @ 1kHz, Unbalanced / 0.0008% @ 1kHz, Balanced | 0.0008% @ 1kHz, Unbalance / 0.0007% @ 1kHz, Balance |
| IMD SMPTE | 0.0004% 800Hz 10kHz(4:1) Unbalanced / 0.0003% 800Hz 10kHz(4:1) Balanced |
0.0004% 800Hz 10kHz(4:1) Unbalanced / 0.0003% 800Hz 10kHz(4:1) Balanced |
0.0004% 800Hz 10kHz(4:1) Unbalanced / 0.0003% 800Hz 10kHz(4:1) Balanced |
0.0007% 800Hz 10kHz(4:1) Unbalance / 0.0006% 800Hz 10kHz(4:1) Balance |
| Output Impedance | Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm) | Balanced out 2.5mm (1ohm)/ PHONES 3.5mm (2ohm) | Balanced out 2.5mm (1ohm)/ PHONES 3.5mm (2ohm) | Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm) |
| Clock Jitter | 50ps (Typ) | 50ps (Typ) | 50ps (Typ) | |
| Memory | Built-in : 256GB [NAND]/ External : microSD (Max 128GB) x1 | Built-in : 128GB [NAND ]/ External : microSD (Max 128GB) x1 | Built-in : 64GB [NAND] / External : microSD (Max 128GB) x1 | Built-in : 64GB [NAND] / External : microSD (Max 200GB) x1 |
