Mini³ portable headphone amp
DIY design developed by
AMB.
Inquire about having one prebuilt by
MisterX or
thrice.
-Amp name/model: Mini³ ("mini cubed")
-In production? Yes
-List price: DIY: varies, approximately $75 USD in parts; Prebuilt: contact builders for pricing info
-Current "street" price: n/a
-Type of amp: Solid state (opamp based) portable, 3-channel active ground. Two versions available: high performance (HP) or extended runtime (XR).
-Stock tubes: n/a
-Crossfeed: None
-Other processors: None
-Portable? Yes
-Power supply: 9V NiMH rechargeable battery, onboard charging circuit with external 15V-24V AC-DC wall adapter.
-Detachable power cord? n/a
-Number of headphone jacks: 1
-Jack output impedance (per jack, if more than one): < 0.01Ω
-Jack output (per jack, if more than one -- include @ #Ohms) n/a
-Jack type: 3.5mm mini phone jack
-Inputs: Line in
-Other outputs: n/a
-Output power, HP edition: 300mW/ch into 32Ω, 30mW/ch into 300Ω
-Output power, XR edition: 180mW/ch into 32Ω, 30mW/ch into 300Ω
-Possible upgrades/upgrade path: n/a
-Input Sensitivity: n/a
-Maximum Gain: 5 (14dB) default, can be built to other gain settings
-Input Impedance: 10KΩ nominal
-Output Impedance: < 0.01Ω 20Hz - 20KHz
-Total Harmonic Distortion, HP edition: 0.0011% (RMAA, 300Ω load)
-Total Harmonic Distortion, XR edition: 0.0023% (RMAA, 300Ω load)
-Intermodulation Distortion, HP edition: 0.0064% (RMAA, 300Ω load)
-Intermodulation Distortion, XR edition: 0.0070% (RMAA, 300Ω load)
-Frequency Response: 0Hz - >4MHz, +0, -3dB (limited by test equipment)
-Slew rate, HP edition: 52V/µS, 100KHz square wave
-Slew rate, XR edition: 162V/µS, 100KHz square wave
-Rise time, HP edition: 166nS 10%-90%, 100KHz square wave
-Rise time, XR edition: 54nS 10%-90%, 100KHz square wave
-Signal to Noise Ratio: 93dBA (RMAA)
-Stereo Crosstalk: -90dB (RMAA)
-Housing material: extruded aluminum
-Size (dimensions): 2.1"W x 3.3"D x 0.9"H approx, not including volume knob
-Weight: 5.6oz. including battery
