Arcam Delta 110
The Arcam Delta 110 is a preamplifier with a built-in Bitstream 1-bit digital-to-analog converter. It was designed to pair with the company’s Delta 170 CD transport. HiFi/Stereo (May 1991, p.18) listed it at $1,500 and noted it was distributed by Audio Influx. It has five analog inputs, switch-selectable coaxial and optical digital inputs, moving-magnet and moving-coil phono stages, and two tape loops with independent source selection - you can listen to one source while recording from another.
The digital and analog sections each get their own toroidal power transformer, and twelve voltage regulators in total keep them isolated. All the circuitry sits on computer-grade, double-sided PC boards. Audio (June 1992, p.54) measured frequency response at 20 Hz to 20 kHz, +0.1/-0.5 dB via line or digital inputs. MM phono sensitivity is 2 mV, MC phono 100 µV, and line-level 200 mV. The same review (p.58) praised the phono section for its flat response above the bass. Most phono stages roll off the low end to handle warp, and the Delta 110 does so without sacrificing linearity elsewhere.
The "Record" button flashes for about five seconds after you press it, and during that time you can select any input for recording. The control logic won't let you monitor the source deck, so there is no risk of feedback loops. A standby feature keeps the power supplies active, so the unit is fully warmed up whenever you switch it on. Dimensions are 17 in. wide, 2½ in. tall, and 10½ in. deep.
- Built-in Bitstream 1-bit DAC (for Delta 170 CD transport)
- 5 analog inputs, coaxial & optical digital inputs
- MM and MC phono inputs
- 2 tape loops with independent source/record selection
- Separate toroidal transformers for digital & analog sections
- 12 voltage regulators
- Frequency response: 20 Hz–20 kHz, +0.1/–0.5 dB (line/digital)
- Sensitivity: MM 2 mV, MC 100 µV, line 200 mV
- Dimensions: 17 × 2½ × 10½ in. (43 × 6.4 × 26.7 cm)
- Original price: $1,500 (1991)
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