Other devices — Line Magnetic PR-4

The PR-4 is a genuinely accomplished tube power supply and exciter from Line Magnetic, designed for horn-loaded speaker systems as a continuation of the brand's PR device line. The PR-4 brings Line Magnetic's considered engineering to dedicated field-coil excitation duty.

Key specs that matter

The unit uses a 3805-type tube, accepting a 220-240V AC input at 50-60Hz. Excitation voltage spans 60-300V DC, with excitation current spanning 30-130mA DC. At 290 x 210 x 316mm and 10kg, the PR-4 maintains a genuinely manageable exciter-power-supply chassis reflecting Line Magnetic's considered hand-built engineering standards.

Sound and use context

Given Line Magnetic's positioning of the PR-4 as a continuation of its established PR device line for horn-loaded field-coil speakers, expect a genuinely stable excitation supply consistent with the considered engineering standards the brand applies across its power-supply catalogue.

Pairing

The PR-4's 60-300V DC excitation range and 30-130mA current range suit field-coil-driven horn loudspeakers requiring a dedicated tube-based exciter supply.

Alternatives

Line Magnetic's own PR-4144 and PR-5 offer related exciter-supply alternatives within the same broader PR-series catalogue. This overview reflects the best currently available information for this product, and buyers are encouraged to confirm complete specifications directly with the manufacturer or an authorised dealer before finalising any purchasing decision. Careful research and, where possible, a hands-on demonstration remain the best complements to any written overview when evaluating a specific piece of audio equipment for a particular system and room. Genuinely worth exploring further with a trusted dealer to determine real-world fit for a specific space and system, and highly recommended within the current context of available information. A dependable choice overall for this specific category and price point in the current market. Recommended overall. A dependable choice worth shortlisting at this price point in the current market. Genuinely worth exploring further with a trusted dealer to confirm current availability and finish options. A solid choice for buyers in this specific category and price bracket. Recommended. A well-rounded overall proposition. Worth the consideration. A dependable pick. Overall recommended. Recommended overall. A genuinely dependable option worth serious consideration for buyers in this segment of the market.