AKG Perception 820 Tube Large-Diaphragm Condenser Microphone Leave a Comment / Uncategorized / By Alexander / October 5, 2016 90 GEARANK 90 out of 100. Incorporating 90+ ratings and reviews. Street Price: $840.00 Manufacturer: AKG Features: Frequency Response: 20 to 20000 Hz ECC83 dual-triode tube circuit Dual one-inch diaphragm microphone Remote control unit Switchable bass-cut filter A 20dB attenuation pad Related Reading: The Best Studio Mics For Vocals – $100 to $1000 The Best Microphones for Recording Acoustic Guitar The Different Types Of Microphones And Their Uses