USB DAC/Network Player
NT-505
Dual monaural USB DAC/Network Player supporting DSD512 and PCM32/768
USB DAC/Network Player
NT-505
SPECIFICATIONS
This model has been discontinued.
It has been replaced with the NT-505-X.
Spec description
| Supported formats | |
| USB input | |
| PCM | 16/24/32 bit 44.1k/48k/88.2k/96k/176.4k/192k/352.8k/384k/705.6k/768k Hz |
| DSD | 2.8M/5.6M/11.2M/22.5M Hz |
| Coaxial digital input | |
| PCM | 16/24 bit 32k/44.1k/48k/88.2k/96k/176.4k/192k Hz |
| DSD | 2.8MHz(supported with 176.4kHz/24-bit DoP format) |
| Optical digital input | |
| PCM | 16/24 bit 32k/44.1k/48k/88.2k/96k/176.4k/192k Hz |
| DSD | 2.8MHz(supported with 176.4kHz/24-bit DoP format) |
| DAC section | |
| USB DAC | Asahi Kasei Microdevices AK4497×2 |
| Up-conversion | up to 384kHz/32-bit PCM, 22.5MHz DSD |
| Digital filters | |
| PCM filters | Sharp Roll Off, Slow Roll Off, Short Delay Sharp, Short Delay Slow, Low Dispersion, off |
| DSD cutoff frequencies | Narrow : 39kHz (at 2.8M), 78kHz (at 5.6M), 156kHz (at 11.2M) or 312kHz (at 22.5M) Wide : 76kHz (at 2.8M), 152kHz (at 5.6M), 304kHz (at 11.2M) or 608kHz (at 22.5M) |
| LAN section | |
| Connector | RJ-45×1(1000Base-T) |
| MQA Decoder | Built-in |
| Audio inputs | |
| USB (rear) | USB B port, USB 2.0, asynchronous mode transfer, bulk transfer |
| Compatible Software | TEAC HR Audio Player (Windows, Macintosh) |
| COAXIAL digital (rear) | RCA pin×1 (gold-plated) |
| Input level | 0.5Vp-p |
| Input impedance | 75Ω |
| Optical digital (rear) | TOS-link×1 |
| Input level | -24.0 to -14.5dBm peak |
| Coaxial digital (front) | 1/8” (3.5mm) mini×1 (combined with optical digital input, detected automatically) |
| Input level | 0.5Vp-p |
| Input impedance | 75Ω * 1/8” Mini - RCA conversion cable included. |
| Optical digital (front) | 1/8” Mini Optical×1 (combined with coaxial digital input, detected automatically) |
| Input level | -24.0 to -14.5dBm peak |
| USB (front) | USB A port |
| Supported media | USB Flash Drive |
| Bluetooth® | |
| Bluetooth® version | 4.0 |
| Output class | Class2 (Range: approx. 33ft/10m) |
| Supported profiles | A2DP, AVRCP |
| Content protection | SCMS-T |
| Supported codec | LDAC™, Qualcomm® aptX™ HD, aptX™, AAC, SBC |
| No. of paired device | maximum 8 devices |
| Audio outputs | |
| XLR balanced | XLR×1 pair (gold-plated) |
| Output level | Fixed (0dB), fixed (+6dB), variable, output off (selectable) |
| Maximum output leve | 2.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (0dB)) 4.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (+6dB)) 12.0Vrms (1kHz, full scale, into 10kΩ, when set to variable) |
| Output impedance | 188Ω |
| RCA unbalanced | RCA pin×1 pair (gold-plated) |
| Output level | Fixed (0dB), fixed (+6dB), variable, output off (selectable) |
| Maximum output leve | 2.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (0dB)) 4.0Vrms (1kHz, full scale, into 10kΩ, when set to fixed (+6dB)) 6.0Vrms (1kHz, full scale, into 10kΩ, when set to variable) |
| Output impedance | 150Ω |
| Headphone outputs | |
| Connector | 1/8” (3.5mm) Stereo TRS(or TRRS) jack×1 (gold-plated) |
| Polarity | Tip:L+, Ring1:R+, Ring3:L-, Sleeve:R- |
| Maximum output | 500mW + 500mW (into 32Ω) |
| Supported impedances | 16 to 600Ω |
| Clock section | |
| Internal clock | |
| Type | Crystal oscillator |
| Number of clocks | 2 (44.1kHz and 48kHz) |
| External clock input | |
| Connector | BNC (gold-plated) |
| Input frequency | 10MHz |
| Input impedance | 50Ω |
| Input level | Rectangle wave: equivalent to TTL levels Sine wave: 0.5 to 1.0 Vrms |
| Audio performance | |
| Frequency Response | 10 to 80,000 Hz (+1/-3 dB, 192kHz PCM input, RCA output, digital filter off) |
| Total harmonic distortion | 0.002% or less (192kHz PCM input, RCA output, digital filter off) |
| S/N ratio | 110dB or higher (192kHz PCM input, RCA output, digital filter off) |
| Power supply | |
| US/Canada | AC 120V 60Hz |
| UK/Europe | AC 220 to 240V 50Hz |
| Power consumption | 18W (0.4W in standby) |
| dimensions (including protrusions) | 290(W)×81.2(H)×248.7(D) mm / 11.4”(W)×3.2”(H)×9.8”(D) |
| Weight | 3.9kg / 8.6lbs |
| Included accessories | Power cord, RCA mini plug adapter cable, remote control (RC-1330),2 AAA batteries for remote control, Owner's Manual (with warranty) |
Up-conversion table
| Input Frequency | Up-converted Frequency | ||||||
| Coax/Opt | USB | off | 2Fs | 4Fs | 8Fs | DSD256 | DSD512 |
| 32kHz | - | 32kHz | 64kHz | 128kHz | 256kHz | 8MHz | 16MHz |
| 44.1kHz | 44.1kHz | 44.1kHz | 88.2kHz | 176.4kHz | 352.8kHz | 11.2MHz | 22.5MHz |
| 88.2kHz | 88.2kHz | 88.2kHz | 88.2kHz | 176.4kHz | 352.8kHz | 11.2MHz | 22.5MHz |
| 176.4kHz | 176.4kHz | 176.4kHz | 176.4kHz | 176.4kHz | 352.8kHz | 11.2MHz | 22.5MHz |
| - | 352.8kHz | 352.8kHz | 352.8kHz | 352.8kHz | 352.8kHz | 11.2MHz | 22.5MHz |
| - | 705.6kHz | 705.6kHz | 705.6kHz | 705.6kHz | 705.6kHz | 11.2MHz | 22.5MHz |
| 48Hz | 48Hz | 48kHz | 96kHz | 192kHz | 384kHz | 12.2MHz | 24.5MHz |
| 96kHz | 96kHz | 96kHz | 96kHz | 192kHz | 384kHz | 12.2MHz | 24.5MHz |
| 192kHz | 192kHz | 192kHz | 192kHz | 192kHz | 384kHz | 12.2MHz | 24.5MHz |
| - | 384kHz | 384kHz | 384kHz | 384kHz | 384kHz | 12.2MHz | 24.5MHz |
|
- |
768kHz | 768kHz | 768kHz | 768kHz | 768kHz | 12.2MHz | 24.5MHz |
No conversion
* Maximum up-conversion rate is 8Fs.
Comparison with previous models
| NT-505 | NT-503 | |
| USB DAC | AK4497×2 (L/R) | AK4490×2 (L/R) |
| DSD | 22.5MHz maximum | 11.2MHz maximum |
| PCM | 768kHz/32-bit maximum | 384kHz/32-bit maximum |
| Up-conversion(maximum) | DSD: 24.5MHz (DSD 256, 512) PCM: 384kHz/32-bit (2fs, 4fs, 8fs) |
DSD: 12.2MHz (DSD 256) PCM: 384kHz/32-bit (2fs, 4fs, 8fs) |
| PCM filters | Digital filters
|
Digital filters
|
| DSD filters | Digital filters
|
Digital filters
|
| Dual mono | Yes | Yes |
| TEAC HCLD circuit (current buffer circuit) |
Yes | Yes |
| TEAC QVCS circuit (high-precision volume) |
Yes | Yes |
| Line/balanced outputs | Yes | Yes |
| Line parallel/unbalanced outputs | Yes | Yes |
| High-precision dual clock | Yes | Yes |
| External clock input (10MHz) | Yes | Yes |
| Preamplifier function | Yes | Yes |
| Bulk Pet transmission | Yes | - |
| MQA decoder | Yes | - |
| Line output level switching |
|
|
| Front digital input | Yes (Combined coaxial/optical mini jack) |
Yes (Combined coaxial/optical mini jack) |
| Bluetooth® input (supported codecs) | LDAC™, aptX™ HD, AAC, SBC | aptX™, AAC, SBC |
| Headphone amplifier circuit | Current-strengthening circuit | Current-strengthening circuit |
| Headphone drive method | Ground separate | Parallel unbalanced |
| Headphone output jack | 1/4” (6.3mm) Stereo TRS×1 | 1/4” (6.3mm) Stereo TRS×1 |
| Remote control | Yes | Yes |