The AT33xMONO/I employs a “True Mono” dual moving coil design that rejects vertical noise delivering clear mono sound with stronger bass and reduced surface noise—ideal even on stereo systems. Its 0.65 mil conical nude stylus tracks mono grooves with precision while a piano-wire suspension enhances tracking and mid-low range impact. A composite zinc aluminum and polymer body minimizes resonance for balanced playback and PCOCC coils ensure pure transmission. Paired with a neodymium magnet and permendur yoke optimized for mono the cartridge achieves efficient responsive high-resolution sound.FeaturesDual Moving Coil Mono Cartridge with Conical Nude StylusPCOCC Coils Ensure Smooth Signal TransmissionComposite Body Reduces Resonance for Balanced SoundMaterial DifferenceThe AT33xMONO/I’s rigid duralumin pipe cantilever which tapers toward the conical stylus tip for improved response is linked with a firm suspension mechanism slightly lowering the dynamic compliance. “True Mono” PCOCC coils are positioned at the cantilever’s fulcrum to ensure pure transmission of horizontal mono signals.Sound BodyEach AT33x Series cartridge body is constructed of three distinct materials – die-cast zinc aluminum and high-rigidity polymer – optimally arranged to reduce and disperse resonance across the cartridge body so that no frequency predominates during playback. Threaded holes are incorporated into the body for easy mounting.Full Warm SoundThe redesigned AT33x Series cartridges deliver that classic analog sound rich in detail across the audio spectrum with lifelike expressiveness in the mid to low frequencies.What's in the BoxAT33XMONO/I Dual Moving Coil Mono CartridgeInstallation KitManualSpecificationsType: MCFrequency response: 20 to 30000 HzOutput voltage: 0.42 mV (1 kHz 5 cm/sec. horizontal signal)Horizontal/vertical output ratio: 25 dB (1 kHz)Output balance: 1.0 dB (1 kHz)Tracking force: 2.0 to 2.4 g (2.2 g standard)Coil imp