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Estimated price (community-sourced)
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The Grant Fidelity B-283 Tube Processor/Buffer is designed to transform solid state audio signals into a more pleasing, musical tube sound. It uses two 6J1 tubes, which are often Mullard brand tubes known for their quality and tonal characteristics. The unit features RCA input and output connectors, weighs approximately 6 pounds, and measures 8 inches wide by 4 inches deep by 6 inches high. It is intended to be patched into solid state systems to provide instant tube warmth and system upgrade. There are two versions of the B-283: the original for mid-fi or vintage systems and the MKII for higher-end systems, with the MKII offering further refinement. The B-283 is valued for adding a tasteful tube character to audio playback without the complexity of a full tube amplifier.
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
Components that show up alongside the Tube Audio B-283 Tube Buffer w/Mullard Tubes in real systems. A verdict means the pair has been checked for compatibility and headroom — open it to see how the two get along.
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The X-10v3's output impedance is 33Ω against the Tube Audio B-283 Tube Buffer w/Mullard Tubes's 0Ω, its weight 2.5 kg (6 lbs) against 2.72 kg (6 lbs), its width 180 mm against 203.2 mm, and its height 88.2 mm against 152.4 mm.
The Lyr 2's output impedance is 0.4Ω against the Tube Audio B-283 Tube Buffer w/Mullard Tubes's 0Ω, its width 228.6 mm against 203.2 mm, and its height 82.55 mm against 152.4 mm. Both share weight (2.72 kg (6 lbs)).
The PA555's output impedance is 100Ω against the Tube Audio B-283 Tube Buffer w/Mullard Tubes's 0Ω, its weight 0.9 kg (2 lbs) against 2.72 kg (6 lbs), its depth 138 mm against 101.6 mm, and its width 153 mm against 203.2 mm.
The HA540's output impedance is 16Ω against the Tube Audio B-283 Tube Buffer w/Mullard Tubes's 0Ω, its weight 1.36 kg (3 lbs) against 2.72 kg (6 lbs), its depth 127 mm against 101.6 mm, and its width 152.4 mm against 203.2 mm.
Musical Fidelity X10-D
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