GEN-300B Update #8: COPULA and the 300B Tubes
- Layer Audio Design
- 6 days ago
- 2 min read
Since the launch of the GEN-300B, one question has come up again and again:
"Can I connect my headphones directly to the speaker outputs?"
Introducing COPULA — a purpose-built Speaker Tap to 4-Pin XLR adapter designed specifically for the GEN-300B. It connects directly to the amplifier's speaker binding posts, providing the shortest signal path from the output stage to your headphones.

Designed for the Few
COPULA is purpose-built for exceptionally demanding headphones that can take full advantage of the GEN-300B’s speaker-level power. It is not intended for conventional or high-sensitivity headphones, as the output exceeds what most models are designed to handle -- please ensure your headphones are rated for speaker-amplifier use before connecting.

Built Without Compromise
Every component inside the COPULA was selected with the same philosophy behind the GEN-300B: No unnecessary complexity. No shortcuts where performance matters.
Features
- Pure 5N silver point-to-point internal wiring
- Gold-plated speaker plugs
- Copper-body 4-pin XLR connector with gold-plated phosphor bronze contacts
- Selectable 4Ω / 8Ω output impedance

Operating Instructions
COPULA features a 4Ω / 8Ω impedance selector to match your amplifier's output tap.
Please select the correct impedance before powering on the amplifier or connecting COPULA to the speaker outputs.
We do not recommend changing the impedance while the amplifier is powered on, as doing so may generate unwanted transients and could potentially damage your headphones or amplifier.
Pre-order starts next week, with special launch price available until end of August.
MSRP: $199
Shipping expected mid-September
# And A Quick 300B Update
Before we wrap up, a quick update on something else many of you have been asking about. Over the past few months, we’ve visited multiple vacuum tube manufacturers and listened to nearly every major 300B available today. Some impressed us. A few were exceptional. But none offered the combination of performance and value we were looking for.
So we decided to build our own.
Development of the LAD 300B is now underway. Combining modern manufacturing, thoughtful engineering, improved materials, and countless hours of listening, we have a simple goal: to build the best performing and value 300B we possibly can.
Below are some photos from our trips so far:





As always, thank you all for your passion and support. We’re excited to share more as development progresses.
Layer Audio Design
