Description: Portable music player with 32GB internal memory and 2 microSD slots, each capable of accepting up to 128GB. Compatible file formats: FLAC ALAC, WAV, AIFF, AAC (unprotected), MP3. Compatible sample rates: up to 192kHz and DSD128. Compatible bit depths: 16–24. Outputs: headphone (3.5mm jack), line/TosLink (3.5mm dual jack). Frequency response: 20Hz–20kHz, ±0.1dB. THD+N: 0.0006%. Output impedance: 0.15 ohm. Maximum output level: 1.9V (High), 1V (Middle), 530mV (Low). Power supply: 3300mAH rechargeable lithium-polymer battery. Supplied accessories:…

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Description: Two-channel tubed, class-AB integrated amplifier. Tube complement: four EL34, two ECC83. Inputs: 5 single-ended (RCA). Outputs: 1 single-ended (RCA), two pairs of binding posts. Rated output power at 1kHz: 40Wpc (16dBW). Input impedance: >100k ohms. Input sensitivity for nominal output power: 250mV RMS. Frequency response: 5Hz–60kHz, –3dB.
Dimensions: 20.7" (530mm) W by 7.8" (200mm) H by 10.5" (270mm) D. Weight: 44 lbs (20kg).
Serial number of unit reviewed: 3819.
Price: $4795; remote control, add $350. Approximate number of dealers: 8.…
Digital Sources: Astell&Kern AK100, Pono Music PonoPlayer portable players.
Headphone Amplifiers: Aurender Flow, Meridian Prime.
Headphones: Audeze LCD-X, AudioQuest NightHawk, Ultimate Ears 18 Pro.—John Atkinson
Analog Sources: Garrard 301, Thorens TD 124 turntables; Abis SA-1.2, EMT 997 tonearms; EMT OFD 25 & OFD 15 & TSD 15 pickup heads; Denon DL-103, Miyajima Premium BE Mono II cartridges.
Digital Sources: Halide Designs DAC HD USB D/A converter; Apple iMac G5 computer running Audirvana Plus 1.5.12; Sony SCD-777 SACD/CD player.
Preamplification: Hommage T2 step-up transformer, Shindo Laboratory Aurieges Equalizer Amplifier phono preamplifier & Masseto preamplifier.
Power Amplifiers: Shindo Laboratory Corton-Charlemagne monoblocks.
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I measured the Questyle Audio QP1R with my Audio Precision SYS2722 system (see the January 2008 As We See It."). Source materials were WAV and AIFF test-tone files, as well as DSD64 and DSD128 files of test tones prepared for me by Malcolm Hawksford. The QP1R's battery was fully charged at the start of the testing, and the player's firmware at the time of testing was the original combination of HW v.3.0 and SW v.0.07 Beta. The Line output was set to Fixed, and I looked at the QP1R's performance via both its Line and Headphone outputs.
The volume control…
I measured the Jadis Orchestra Reference Mk.II using my Audio Precision SYS2722 system (see the January 2008 As We See It). I had a problem inserting the EL34 output-stage tubes: the positioning lug on the tube's bottom didn't make a sufficiently positive engagement with the matching cutout in the ceramic tube base. I broke one EL34 when I thought I had it correctly inserted but found out it wasn't—when I removed the tube to reinsert it correctly, its plastic base broke off. Before beginning the testing, I carefully reinserted the broken tube in the correct…
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