The Beyerdynamic DT770 Headphones 250 Ohm are closed back dynamic studio headphones of the highest quality and a firm favourite for those looking for an accurate reference headphone with an excellent bass response. The circumaural design with velour cushions and adjustable headband makes the DT-770 headphones really comfortable, even over prolonged periods. The DT770 250Ohm version is designed for the studio, delivering a higher impedance and a slightly more accurate response than the 80Ohm versions. The higher impedance also means you can safely use multiple headsets from the same source.
The two most common complaints when mixing using closed back headphones are that they are uncomfortable and don't produce enough bass, leaving mixes overly compensated (see the FAQ further down for the reasons why). The answer to first problem is to buy open back headphones, but they are no good for recording purposes and may not solve the second issue of bass response. Fortunately, the DT770 Pro tackle both these problems, delivering an impressive nominal frequency response of 5Hz-35kHz using their innovative bass reflex system with a very large cup and velour cushions that let air through but not sound, thus reducing pressure.
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Bayerdynamic DT770 Pro features and specifications:
- Soft inner headband
- Adjustable and robust steel headband
- Velour earpads
- 3m coiled cable with single sided connection
- Transducer Type: Dynamic
- Operating principle: Closed Back
- Nominal Frequency Response: 5Hz to 35,000Hz
- Nominal Impedance: 250Ohm
- Nominal Sound Pressure Level: 96dB
- Nominal Total Harmonic Distortion: <0.2%
- Power Handling Capacity: 100mW
- Ambient Noise Isolation: Approx. 18dB(A)
- Connector: 1/8” (3.5mm) – 1/4” adaptor is supplied
- Weight (without cable(: 270g
Beyerdynamic DT770 Pro FAQ:
Beyerdynamic DT 770 Pro 80 vs 250
The different impedances are used for different situations and brought about by a different coil design. The higher impedance headphones use a thinner wire and have a more lightweight design. The lesser weight allows a better movement resulting in a slightly better quality signal. The lower impedance is brought about by a thicker wire which lets more signal through, hence a lower impedance, but the additional weight means the diaphragm doesn't move so accurately.
Which headphones should I buy; 80 Ohm or 250 Ohm?
A pair of 80Ohm headphones are louder and require less power, which is great for mobile or front of house applications where the deficiency in sound quality would not be noticed. A pair of 250Ohm headphones would be more accurate but quieter – which is no problem in a quiet studio with a powerful headphone preamp which you can find on mixers or mains driven audio interfaces.
Should I buy open or closed back headphones?
Closed headphones are primarily designed to keep sound in, so that musicians can listen to audio through the headphones whilst recording using a very sensitive microphone. Any bleed from the headphone would be recorded, so the less audio that escapes, the better. The design also has the reverse effect of blocking outside sound out, making them ideal for use in public or other noisy spaces. The downside is that in order to minimise bleed they need to effectively seal the cup to your ear which means air can't get in or out and the movement of the diaphragm can feel like it is sucking your ear-drum. The second problem is that the materials used to block help limit the amount of audio getting in or out of the cups, also absorb audio being produced by the headphone, especially low end frequencies, thus losing bass response. Therefore, open back are preferable for mixing and prolonged use, the ambient noise that you can hear clearly makes it feel and sound far more natural. Ideally, if you want to mix and record then you should by both open and closed back.
What is a circumaural design?
Circumaural is a term used to describe an ear cup that completely surrounds the ear so that the whole of your ear, pinna included, is contained within the cup.