RA1 vs Bellari Audio HA543
The HA543's power @ 8ω is 0.326W against the RA1's 0.3W, its input impedance 10Ω against 100Ω, and its weight 0.45 kg (1 lbs) against 0.34 kg (1 lbs). Both share height (38 mm).
AI-generated product photo — not official manufacturer imagery.
AmplifiersHeadphone AmplifiersDiscontinued
Estimated price (community-sourced)
$425
Around — community and catalog average, updates slowly
About the RA1
The Grado RA1 Reference Headphone Amplifier enhances the performance of Grado headphones with its warm, smooth, full-bodied, and non-fatiguing sound signature. Machined from a solid block of mahogany, it features a compact design and is optimized for line-level sources. The AC-powered version uses 100-230 VAC input with an outboard power supply, while the battery-powered variant runs on two 9-volt batteries for 40-50 hours. Both deliver state-of-the-art amplification particularly synergistic with Grado cans, though effective with others. A high-gain RA1-HG variant exists for headphones over 100 ohms. Now discontinued by Grado Labs.
Specifications
Analog Output
Analog signal output specifications
- Output Impedance
- 32Ω
Connectivity
Input and output connections
- Analog Inputs
- RCA
- Analog Outputs
- 1/4" headphone jack
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 127 × 38 × 140 mm (W × H × D)
- Weight
- 0.34 kg (1 lbs)
- Available Colors
- Mahogany
Key Specifications
Power: 0.3W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions