I need an adapter for my headset to plug into my bass. I want to be able to play when the household is asleep. any suggestions?

If you're looking for just an adapter, even a simple one will work. I personally own one that looks exactly like the Sennheiser one below, and it works great for exactly what you're talking about. I've used it multiple times to play my guitar while others in my house were sleeping. Here are some options of adapters that I've found that can be purchased online. Most are pretty inexpensive.

This may sound silly but there very few things I think are super important in headsets.  So first and foremost comfort. I look for over stuffed padding as well adjustable to the ear which most are. Even better is when they are adjustable or already a little wider than normal so you can wear them for long periods of time. Lastly, noise cancelling which is very important in your case.  All that being said I am recommending the SRH840 Closed-back Headphones.


Sennheiser HD 280 PRO Closed Circumaural Headphones Features at a Glance:

• Ear coupling: Circumaural
• Accurate, linear reproduction for critical monitoring applications
• Replaceable parts for long life
• Neodymium magnets for optimum sensitivity and wide dynamic range
• Very good attenuation of background noise
• Lightweight design
• Circumaural ear pads provide comfortable fit
• Easily replaceable, single-sided coiled cable
• Space-saving design with collapsible, rotating ear-pieces
• Screw-type adapter for 1/4-inch jacks

AKG K240 Studio Features at a Glance:

• Dynamic headphones. Circumaural, semi-open
• Self-adjusting headband for optimum fit
• Frequency Range: 15 Hz to 25,000 Hz
• Sensitivity: 91 db SPL/mW
• Power handling capability: 200 mW
• Rated impedance: 55 Ohm
• Cable: 10 ft. plug-in cable
• Stereo adapter: gold plated, screw-on 1/8" to 1/4" jack
• Net Weight (without cable): 8.5 o

SRH840 Closed-back Headphones Features:

• Precisely tailored frequency response delivers rich bass, clear midrange and extended highs
• Wide, padded headband provides ergonomic fit for superior comfort over extended periods
• Closed-back, circumaural design rests comfortably over the ears and reduces background noise
• Collapsible design for easy storage and portability
• Legendary Shure quality to withstand the rigors of everyday use
• Bayonet Clip securely locks cable into ear cup
• Replaceable ear cup pads included to ensure long product life
• 10ft coiled detachable cable provides plenty of length and easy storage and replacement
• Carrying bag protects headphones when on the go or not in use