Measurement's report Bowers & Wilkins P7 - Reference Audio Analyzer

Reports / Bowers & Wilkins / P7 - report for a pro

Bowers & Wilkins P7 (report for a pro)

Test report - general data Bowers & Wilkins P7 headphone

Frequency response, Impedance, Frequency response with standard AMPs

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Perception of headphone frequency response curves of equal loudness ISO 226-2009

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Sensitivity average in band from 100 Hz - 10 kHz116.7dB/V SPL
100.3dB/mW SPL
Impedance average in band from 40 Hz - 15 kHz23.2ohm
For 90 dB SPL, a voltage is required-26.7dBV
0.046VRMS
Taking into account the peak factor of 9 dB for the music signal-17.7 dBV
0.131VRMS
Measurements were performed on the stand:HDM-X






Frequency response and sensitivity headphones Bowers & Wilkins P7 headphone

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Channel

Frequency band

Channel:LeftRight
Sensitivity average in band from 100 Hz - 10 kHz116.8 116.5dB/V SPL
Sensitivity average in band from 100 Hz - 10 kHz100.3100.2 dB/mW SPL
Sensitivity at 1 kHz117.6118.1dB/V SPL
Sensitivity at 500 Hz116.1115.4dB/mW SPL


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Frequency response of headphone Bowers & Wilkins P7 headphone

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Channel

Range

Frequency band

Smoothing

Channel:LeftRight
Variation in frequency response in band from 100 Hz - 10 kHz -10.4, +4.9-10.5, +6.0dB


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Impedance Bowers & Wilkins P7 headphone

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Channel

Frequency band

Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz22.9 23.6ohm
Resistance at 1 kHz22.6 23.8ohm
Resistance at 500 Hz22.4 23.1ohm
The minimum value in band from 40 Hz - 15 kHz21.1 21.5ohm
The maximum value in band from 40 Hz - 15 kHz26.8 27.5ohm


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Electric phase Bowers & Wilkins P7 headphone

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Channel

Range

Frequency band

Channel:LeftRight
Phase deviation is the average in the range 40 Hz - 15 kHz0.2 0.2°
Phase at 1 kHz0.4 0.9°
Phase at 500 Hz-1.1 -0.9°
The minimum value in band from 40 Hz - 15 kHz-4.5 -4.5°
The maximum value in band from 40 Hz - 15 kHz14.4 13.8°




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Perception of headphone frequency response curves of equal loudness ISO 226-2009

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Channel

Range

Variation in frequency response in band from 30 Hz - 12 kHz
Channel:LeftRight
Deviation -36.0 dB-8.2, +7.2 (15.4)-10.2, +5.7 (15.9)dB
Deviation -24.0 dB-9.2, +5.3 (14.5)-9.9, +4.0 (13.8)dB
Deviation -12.0 dB-10.3, +3.4 (13.7)-10.6, +3.7 (14.3)dB
Deviation 0.0 dB-11.3, +5.5 (16.8)-11.8, +7.0 (18.8)dB
Deviation 12.0 dB-12.4, +9.5 (21.8)-13.0, +10.9 (23.8)dB
Deviation 24.0 dB-13.4, +13.6 (26.9)-14.1, +15.0 (29.1)dB
Deviation 36.0 dB-14.4, +17.7 (32.0)-15.3, +19.1 (34.3)dB

Variation in frequency response in band from 40 Hz - 1 kHz
Channel:LeftRight
Deviation -36.0 dB-8.2, +7.2 (15.4)-10.2, +5.7 (15.9)dB
Deviation -24.0 dB-9.2, +5.3 (14.5)-9.9, +4.0 (13.8)dB
Deviation -12.0 dB-10.3, +3.4 (13.7)-10.6, +3.7 (14.3)dB
Deviation 0.0 dB-11.3, +5.5 (16.8)-11.8, +7.0 (18.8)dB
Deviation 12.0 dB-12.4, +9.5 (21.8)-13.0, +10.9 (23.8)dB
Deviation 24.0 dB-13.4, +13.6 (26.9)-14.1, +15.0 (29.1)dB
Deviation 36.0 dB-14.4, +17.7 (32.0)-15.3, +19.1 (34.3)dB


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Frequency response Bowers & Wilkins P7 headphone when connected to amplifiers with constant output impedance

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Channel

Range

Frequency response

Frequency response of amplifier with constant output resistance 100 Hz - 10 kHz
Channel:LeftRight
Bowers & Wilkins P7 + AMP 0 Ω -11.3, +4.0-12.1, +4.5dB
Bowers & Wilkins P7 + AMP 10 Ω -11.4, +4.2-12.3, +4.6dB
Bowers & Wilkins P7 + AMP 20 Ω -11.4, +4.3-12.4, +4.7dB
Bowers & Wilkins P7 + AMP 50 Ω -11.5, +4.4-12.5, +4.8dB
Bowers & Wilkins P7 + AMP 100 Ω -11.6, +4.5-12.6, +4.9dB
Bowers & Wilkins P7 + AMP 300 Ω -11.6, +4.6-12.7, +4.9dB

Variation in frequency response with amplifiers with constant output resistance @ 100 Hz - 10 kHz
Channel:LeftRight
Bowers & Wilkins P7 + AMP 0 Ω 0.00.0dB
Bowers & Wilkins P7 + AMP 10 Ω 0.40.4dB
Bowers & Wilkins P7 + AMP 20 Ω 0.60.6dB
Bowers & Wilkins P7 + AMP 50 Ω 0.80.9dB
Bowers & Wilkins P7 + AMP 100 Ω 1.01.1dB
Bowers & Wilkins P7 + AMP 300 Ω 1.11.3dB


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Frequency response Bowers & Wilkins P7 headphone when connected to an amplifier with zero output impedance and raising of output impedanse in low frequencies

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Channel

Range

Frequency response

Variation in frequency response in band from 100 Hz - 10 kHz
Channel:LeftRight
Bowers & Wilkins P7 + AMP 0 Ω -11.3, +4.0-12.1, +4.5dB
Bowers & Wilkins P7 + AMP ➘ 0 Ω -11.2, +3.1-12.0, +3.6dB

Deviation of frequency response @ 40 Hz
Channel:LeftRight
Bowers & Wilkins P7 + AMP 0 Ω 0.00.0dB
Bowers & Wilkins P7 + AMP ➘ 0 Ω 0.40.4dB


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Impulse response Bowers & Wilkins P7 headphone

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Channel

Duration for impulse, envelope and step responses

Waveforms

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Square wave Bowers & Wilkins P7 headphone

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