| № 631 |
Monaural Power Amplifier (per unit) |
Very new (Q4 2025); no widespread issues yet. Minor early firmware glitches possible. |
Power-supply electrolytics may dry out after 10+ years. Routine recap advised to maintain bass control and prevent hum. |
| № 632 |
Dual-Monaural Power Amplifier |
New model; isolated standby-mode glitches reported. |
High-current output stage caps prone to heat stress — replace at ~15-year service. |
| № 534 |
Dual-Monaural Power Amplifier |
Rare startup clicks; occasional relay sticking in humid environments. |
Power-supply filter caps leak after 7–10 years → buzz. Full recape, restores dynamics. |
| № 626 |
Dual-Monaural Preamplifier |
Brand new; occasional digital input dropouts with high-jitter sources. |
Low-power design = slower degradation, but phono-stage coupling caps benefit from swap after ~12 years. |
| № 519 |
Digital Audio Player / CD / DAC |
Firmware/Roon visibility bugs (fixed via updates); slow iPad app. |
Analog output stage electrolytics cause jitter after ~8 years; recap improves timing accuracy. |
| № 536 |
Monaural Power Amplifier (per unit) |
Auto-standby false triggers; slight distortion rise at high freq with low-impedance loads. |
Output & filter caps fail ~10 years (leaking common). Recap essential |
| № 585.5 |
Integrated Amplifier with Phono & DAC |
USB recognition fails after 2–3 years (firmware fix); standby issues with some power conditioners. |
Phono/DAC coupling caps degrade → hum. Full recap every 10 years. |
| № 523 |
Dual-Monaural Preamplifier |
Rare power-on delays; no balanced outputs on some configs (design choice). |
Input buffer caps cause channel imbalance after ~8 years; recap restores transparency. |
| № 5206 |
Dual-Monaural Preamplifier |
SSD input gain mismatch in bypass; occasional digital dropouts. |
Power-supply caps fail after 5–7 years in hot environments. |
| № 5805 |
Integrated Amplifier (Analog + Digital) |
Early firmware bugs (standby lockups, input delays — now patched). |
Filter caps in amp section leak after 6–8 years → buzz. Recap mandatory for phono stage. |
| № 5802 |
Integrated Amplifier (Digital-only) |
Rare DAC lock delays on high-res files. |
Output stage needs recap every ~10 years; otherwise very reliable. |
