PAAA23PB

AA23PB

Parasound

Experience exceptional power and audio performance with the black Parasound Halo A23+ 2-Channel Power Amp. The A23+ is a straightforward power amplifier providing two discrete channels capable of outputting 160W at 8 ohms, two channels driven, while running cool and quiet.Connect to your stereo preamp via two balanced XLR or unbalanced RCA inputs. Gold-plated binding post pair outputs are available to connect to your speakers, and are capable of stereo, bridged-mono, and bi-amp output. This amp uses circuitry designed by legendary audio engineer John Curl, with his famous JFET input stage and complementary MOSFET driver stage that he originally pioneered with The Grateful Dead's Wall of Sound. It features high-bias Class-A/AB operation with carefully selected components wired as directly and discretely as possible. The result is pure power and clean sound for audiophile quality performance.Circuit Designed by John Curl Parasound design consultant John Curl has been a legend among audiophiles and electronic engineers for decades. He pioneered measurements to correlate musical accuracy with the materials used in parts, worked with world-class touring companies, has designed highly coveted audio classics, including the original Mark Levinson JC-2, Denneson JC-80, Vendetta Phono Preamplifier, and CTC Blowtorch preamplifiers; master recorders for Wilson Audio and Mobile Fidelity; and the mixing consoles used in live concerts by The Grateful Dead and the Montreux Jazz Festival in Switzerland.Carefully Selected Components Every part within the A23+ is carefully chosen for its accuracy and reliability. Metal film resistors with 1% tolerance are selected for their precision and because their values don t drift as they heat up during operation. Polypropylene and mica capacitors are used extensively for their superior linearity and low dielectric absorption. Semiconductors are selected for superior performance in their specific roles in the circuit. Gold has the best conductivity of any metal, so high-quality gold-plated input connectors and speaker terminals are used. The double-sided circuit boards are FR4 glass epoxy for long-term durability. The chassis is made of heavy gauge steel to safely house the internal circuitry. This attention to detail when selecting parts makes the difference between a very good amplifier and an outstanding amplifier.Audio Circuit Path Topology Parasound s circuit topology is a hybrid of carefully chosen discrete transistors that result in superior performance at each stage. Parasound uses JFETs (Junction Field Effect Transistors) for the input stage, MOSFETs (Metal Oxide Field Effect Transistors) for the driver stage, and bipolar transistors for the output stage. Discrete transistors are more sonically accurate than integrated circuits commonly used by other brands.Bridged Mode Bridged operation configures the left and right channels to function as a single channel higher power amplifier to drive a single speaker. When an A23+ is in Bridged Mode it provides far greater power output than the sum of its left and right channels' power output. Please note that in bridged operation the minimum speaker impedance is 8 ohms. It is not recommended to use the A23+ with a 4-ohm speaker while set to bridged mode.Bi-Amping Capability Bi-amping is another option to increase power delivery per speaker. Similar to bridged-mono operation, bi-amping requires one A23+ amplifier per speaker. Bi-amping also requires speakers with separate LF (Low Frequency) and HF (High Frequency) input terminals with removable metal straps or wires. The left channel of the first A23+ will power the LF section of one speaker and this same A23+ s right channel will power the HF section of the same speaker. The second A23+ will connect the same way to the second speaker s LF and HF inputs. When bi-amping, both A23+ s Bridged switches must be set to their Normal (Stereo) position.Class-A/AB Operation Pure Class-A operation provides the purest so