Ross
500+ Head-Fier
- Joined
- Jun 22, 2001
- Posts
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I'm not quite sure where this question belongs, so I'll post it here.
In the Headroom forum, Tyll mentions that the new 9v Airhead, designed for headphones of 150 ohms+, will work with Grados and other low impedance headphones with the 120 ohm adapter available with the Porta Corda.
Does this mean that any headphone amp designed for headphones of 250 ohms or more (and I have several of these) will work with Grados using a 120 ohm adapter?
What is the ideal resistance of an adapter for this purpose? Is there a formula? Is it simply a question of adding the headphone impedance to the adapter resistance (e.g. Grado + adapter = 152 ohms)?
What happens if you use 32 ohm headphones on an amp designed to drive 250 ohm headphones? Whenever I've tried this, it sounds okay. Is there damage being done to the amp? Does it detrimentally affect the sound?
Any help with these questions would be appreciated.
Ross
In the Headroom forum, Tyll mentions that the new 9v Airhead, designed for headphones of 150 ohms+, will work with Grados and other low impedance headphones with the 120 ohm adapter available with the Porta Corda.
Does this mean that any headphone amp designed for headphones of 250 ohms or more (and I have several of these) will work with Grados using a 120 ohm adapter?
What is the ideal resistance of an adapter for this purpose? Is there a formula? Is it simply a question of adding the headphone impedance to the adapter resistance (e.g. Grado + adapter = 152 ohms)?
What happens if you use 32 ohm headphones on an amp designed to drive 250 ohm headphones? Whenever I've tried this, it sounds okay. Is there damage being done to the amp? Does it detrimentally affect the sound?
Any help with these questions would be appreciated.
Ross