The Advanced Audio CM28 is a tube pencil microphone with a unique hybrid topology. The CM28 offers the warmth of a tube microphone and the excellent detail of a fet. Our circuit provides at least 6db more headroom than traditional fet/transformer circuits. We do this with a fet front end designed to capture all the detail of the 28.5mm capsule which is then coupled into a 6J1b tube driving our BV11 transformer. This approach takes full advantage of a low noise fet circuit. The tube stage then needs to provide very little gain so it is configured as a Low Z driver. The tube provides the fet with a very high impedance load so the fet's headroom can be maximized. The head grill provides ample protection for the more delicate capsule while minimizing early reflections. The head grill also threads off to reveal a capsule that looks like the ones used in the venerable KM84. These capsules have no grating and an extremely low rim recess to minimize reflections. There is a simple remote power supply that provides power to the tube and fet circuits. The CM28 also has a -15db external pad for high SPL situations and a LF roll-off. Each CM28 microphone is supplied with three capsules:- CARDIOD OMNI-DIRECTIONAL HYPER-CARDIOD WIDE-CARDIOD available for an additional $59. Other features include: SHOCK-MOUNT 7-Pin Microphone cable Aluminum Road case Specifications: • Capsule Type: 19.5mm condenser low profile capsule which is externally polarized. • Frequency Range: 20Hz to 20kHz response relates to pattern type. • Capsule patterns: Omni, Cardioid, Wide Cardiod and Hypercardiod. • Sensitivity: 14MV/Pa = -37dB (0dB = 1v/Pa) -10db. • Impedance: 200 ohms. • Max SPL: 120 dB/135db w/ -15db pad. • Distortion: < 1% THD @ 1KHz) 120dB or at 135db w/-15db pad. • Equivalent Noise18 dB (A-weighted). • Circuit: Class "A" Tube Type. • Power Supply: 1120/220v a/c with 7 pin Neutriks supplying 6vdc & 125v dc to microphone. • Weight: 4.2 oz (119g). • Size: 5 1/2" (140mm) length x 13/16" (21mm) diameter. • Pad: -15dB (Via Switch) • Filter: HPF @ 80 Hz (Via Switch)     CM-28: $535.00 Shipping USA & Canada: $30.00   International Purchasers. Please complete your order and we will contact you within 2 business days regarding additional shipping charges to your country or contact us for more information.