Sennheiser

Sennheiser Headphones

Me Reinventing headphones, Jan 2007

I started with Sennheiser HD400 headphones somewhere at the age of 16 (the year 1980), and since we have several headphones in the familiy such as the famous HD424 and recenty the HD650. In order to keep myself up to date with impedance and frequency response figures I decided to collect some more data on Senns. I'll probably skip the in-ear and wireless models.

Type	Impedance	Lo Freq	Hi Freq	Sens/1kHz	System	Weight	Yr Intro	Price
HD280 pro								139 Eue
HD400
HD420
HD424	600				open			75 Eur
HD433
HD455
HD515	120	14	26k	108dB	open, circumaural	255gr
HD540 ref	32	14	21k		semi-open	210gr
HD545 ref					closed	280gr
HD555	120	15	28k	112dB	semi-open	260gr		139 Eur
HD580 Precision	300	16	30k				1994	349 $
HD580 Jubilee	300	16 - 10 -	30k (-3dB)/ 38k (-10dB)	97dB	open, circumaural	260gr	1995	275 Eur
HD590 Prestige	120	12	38	102 dB	open, circumaural	9.4 oz	1999
HD595	120	12	38.5	112dB	open, circumaural	270gr
HD600	300	12	39k	97dB	semi-open	260gr	1998	449 $
HD650	300	10	39.5	103dB/115	closed	260gr	2006	295 Eur

Note: The technical specs on the Sennheiser homepage do not correspond to the figures in the technical documents. The HD650 has a sensitivity of 103dB in the technical specs on the homepage but 115dB in the PDF documentation.

Also, the nominal impedance of the 515, 55 and 595 is according to the German site 50 Ohms and not 120.

HD424

HD 455

Technical data
Frequency response 18 - 21.000 Hz
Acoustic principle dynamic, "open-aire"
Frequency curve diffuse-field loudness equalization
Nominal impedance 52 ƒ¶
Sensitivity at 1 kHz 94 dB } 2 dB
Power handling capability 0.1 W as per DIN 45580
THD (as per DIN 45500) < 0,9 %
Sound coupling to the ear on the ears (supraaural)
Headphone caliper pressure approx. 2.5 N
Weight (without cable) approx. 120 g
Plug 3.5 / 6.3 mm o stereo jack
Connecting cable OFC signal cable, 3 m
The earpads have to be replaced from time to time for hygienic reasons.
Earpads (1 pair), Order No. 52125.
Subject to alterations.

HD 580 Precision

TECHNICAL DATA
Frequency response 16 - 30.000 Hz (-3 dB)
12 - 38.000 Hz (-10 dB)
Acoustic principle dynamic, "open-aire"
Frequency curve diffuse-field loudness equalization
Nominal impedance 300 ƒ¶
Sensitivity at 1 kHz 97 dB
Power handling capability 0.2 W as per DIN 45580
THD (as per DIN 45500) . 0,1 %
Sound coupling to the ear circumaural
Headphone caliper pressure approx. 2.5 N
Weight (without cable) 260 g
Plug 3.5 / 6.3 mm o stereo jack
Connecting cable OFC signal cable, 3 m

HD650

Technical data
Frequency response 16 . 30,000 Hz (-3 dB)
10 . 39,500 Hz (-10 dB)
Acoustic principle dynamic, "open-aire"
Frequency curve diffuse-field loudness
equalization
Nominal impedance 300 ƒ¶
Sound pressure level at 1 kHz 103 dB (1 Vrms)
Long-term max. input power 500 mW as per EN 60-268-7
THD . 0.05 %
Sound coupling to the ear circumaural
Headphone caliper pressure approx. 3.4 N } 0.3 N
Weight (without cable) 260 g
Plug 6.3 mm . stereo jack
Adapter 6.3 --> 3.5 mm . stereo jack
Connecting cable OFC signal cable, 3 m

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