Aristona EW5512

The Aristona EW5512 is a consumer/semi-hi-fi 4-track stereo reel-to-reel tape recorder from the mid-1970s (around 1975–1977). It was produced under the Aristona brand (a budget/export/parallel line of Philips, Netherlands) and is essentially the same machine as the Philips N4512 (sometimes referenced with minor regional suffix variations like /13). It belongs to the “plastic fantastic” generation of Philips/Ariston a open-reel decks, known for good performance at an accessible price point.

Key Technical Specifications

• Format: Open-reel (reel-to-reel) magnetic tape recorder.

• Track Configuration: 4-track, 2-channel stereo (quarter-track). Supports full stereo recording and playback, plus mono compatibility. It can play pre-recorded stereo tapes.

• Tape Speeds: Three speeds — 4.75 cm/s (1⅞ ips), 9.5 cm/s (3¾ ips), and 19 cm/s (7½ ips). The highest speed provides the best fidelity for music.

• Reel Capacity: Up to 18 cm (7 inches) diameter reels.

• Drive System: 3 DC motors — one servo-controlled capstan motor for precise speed stability and two separate reel motors for better tape tension and handling.

• Heads: 3 heads — separate erase, record, and playback heads. This enables off-tape monitoring (A/B comparison) during recording.

• Electronics: Fully solid-state (transistorized).

• Frequency Response (at 19 cm/s): Approximately 35 Hz – 25/26 kHz (very good extension for a consumer deck of the era).

• Wow & Flutter: Around 0.05% (at 7½ ips) — solid speed stability thanks to the servo capstan.

• Signal-to-Noise Ratio: Up to ~58–70 dB (depending on measurement and any built-in noise reduction like DNL if present in the variant).

• Total Harmonic Distortion: Low, typically under 1–3%.

• Inputs: Microphone (low level, ~0.2 mV), line/phono/radio (~100 mV).

• Outputs: Line out (~0.25–1 V), headphone jack, and connections for external amplifiers/speakers.

• Power Supply: AC mains, switchable 110/220–240 V.

• Dimensions (approx.): ~41–42 × 42–45 × 18–20 cm.

• Weight: Approximately 8.5–10 kg.

Features

• Stereo recording with two microphones or line sources.

• Off-tape monitoring for accurate level and sound checking while recording.

• Solenoid or logic-assisted transport controls (Record, Play, Pause, Stop, FF, Rewind).

• Tape counter (often belt-driven).

• Recording level controls and indicators.

• Designed for home hi-fi use: live music, vinyl/radio dubbing, voice, and archiving with decent musicality.

Performance Context

The EW5512 / N4512 sits in the upper consumer tier of late-1970s Philips/Ariston a machines. The combination of a 3-motor drive, 3-head configuration, and servo capstan gives it noticeably better mechanical stability and audio performance than earlier single-motor or 2-head models. At 19 cm/s it delivers a wide, detailed sound with good bass extension and high-frequency response suitable for music. It is not a professional studio deck but was well-regarded by enthusiasts for home recording and playback. Some collectors describe this series as “good” — better than the immediate later generation but not quite at the level of higher-end Philips or Revox machines.

Build and Market Position

• Sturdy tabletop design with typical Philips/Ariston a functional styling (metal chassis with plastic elements; sometimes nicknamed “plastic fantastic” due to certain components).

• Aristona versions offered the same core engineering as Philips-branded equivalents at a more affordable price, popular in European and export markets.

Restoration Notes: These units are relatively serviceable with parts still available:

• Replace hardened rubber parts (pinch roller, main drive belts, and especially the counter/tape counter belt — dedicated belt kits exist for the EW5512).

• Refresh aging electrolytic capacitors in the audio and power sections.

• Clean and lubricate the tape path, demagnetize heads, and adjust azimuth for optimal high-frequency response.

• Check and calibrate speeds across all three settings; the servo capstan is generally reliable when electronics are clean. Service manuals are available under the Philips N4512 designation and apply directly to the Aristona EW5512.

Surviving examples appear on marketplaces, often needing belt replacement and basic servicing to perform at their best.