Tannoy B475 user manual Technical Specifications

11. Technical Specifications

Frequency response (1) +/- 3dB	28Hz - 240Hz
Recommended Amplifier Power	400 - 800 Watt / 8Ω
Power Handling	Average (2)	Programme	Peak (10ms)
	300 Watt	600 Watt	1200 Watt
Sensitivity (1)
2.83 volt @ 1m	98dB	101dB (half space)
Maximum SPL (3)	Average	Peak
@ 1m	123dB	129dB
Impedance	Nominal	8Ω
	Minimum	7.8Ω
Distortion	2nd Harmonic	3rd Harmonic
0.1 Full Power
100 Hz	0.22%	0.12%
250 Hz	0.23%	0.08%
0.01Full Power	2nd Harmonic	3rd Harmonic
100 Hz	0.17%	0.23%
250 Hz	0.21%	0.29%
Driver Complement	1 x 18” High efficiency bass unit Type 4505
Crossover Point	Active: Recommended points
	70-240 Hz, 24dB/octave, Linkwitz – Riley
	(dependant on application)
Enclosure	168 litre, vented, 18mm multi-ply birch plywood
Finish	Textured black/grey paint
Protective Grille	Black Perforated Steel, with 50% free air-flow
Connectors	2 × Speakon™ NL4MP – in/out
Fittings	8 × M10 flying inserts
	2 × Man pullback point
	2 × recessed carrying handles
	1 × pole mount socket
Dimensions	577mm (H) × 556mm (W) × 650mm (D)
	22.7” (H) × 21.9” (W) × 25.6” (D)
Weight	40.0 kg (88 lbs)

NOTES:(1) Average over stated bandwidth. Measured at 1m on axis, in an anechoic chamber.

(2)Long term power handling capacity as defined in EIA standard RS - 426A.

(3)Unweighted pink noise input, measured at 1m

Tannoy operates a policy of continuous research and development. The introduction of new materials or manufacturing methods will always equal or exceed the published specifications which Tannoy reserve the right to alter without prior notice. Please verify the latest specifications when dealing with critical applications

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