Overview
Audio Research - PH8 Phono Preamplifier
With the award-winning Reference Phono 2 reigning at the top, and the superb PH6 anchoring our lineup with a more affordable price, we are pleased to introduce the PH8 phono preamplifier.
The PH8 benefits from a number of circuit and parts improvements derived from the award-winning REF Phono 2. Rather than using the four 6922s of its predecessor, the PH8 uses two 6H30 tubes along with special low-noise FETs; vacuum tube regulation incorporates a 6550 and a 6H30, as featured in the REF Phono 2 and REF5. Capacitors are all the same types as those used in the REF Phono 2, including the same coupling caps, and Teflon® caps used in both the RIAA stage and as bypass caps. There is also a new R-core transformer. Circuit board material is the same as in our Reference products.
Specifications
SPECIFICATIONS
FREQUENCY RESPONSE: ± .2dB of RIAA, 10Hz to 60kHz; 3dB points below 0.3Hz and above 400kHz.
DISTORTION: Less than .005% at .50V RMS 1kHz output. GAIN: 58dB at 1kHz (MC & MM compatible).
PUSH BUTTONS: Power, Mono, Load, Mute.
INPUT IMPEDANCE: Selectable 47K, 1000, 500, 200, or 100 ohms with 200pF Unbalanced.OUTPUT IMPEDANCE: 200 ohms Unbalanced. Recommended load
50K-100K ohms and 100pF. (10K ohms minimum and 2000pF maximum.)0
OUTPUT POLARITY: Non-Inverting.
MAXIMUM INPUTS: 70mV RMS at 1kHz (180mV RMS at 10kHz).
RATED OUTPUTS: .50V RMS 10Hz to 60kHz, 100K ohm load (output capability is 50V RMS output at 1/2% THD at 1kHz).
POWER SUPPLIES: Electronically-regulated low and high voltage supplies. Line regulation better than .01%.
NOISE: 0.2uV equivalent input noise, IHF weighted, shorted input (74 dB below 1mV 1kHz input).
TUBE COMPLEMENT: (2) 6H30 dual triodes with JFET input. 6550 and 6H30 as HV regulators.
POWER REQUIREMENTS: 100-135 VAC 60Hz (200 - 270VAC 50/60Hz) 80 watts maximum. Line fuse 3A slo blo (1.5A slo blo 230V). Standby: Less than 1 watt.
DIMENSIONS: 19" (47 cm) W x 5.22" (13.2 cm) H x 12.0" (30.5 cm) D. Rear chassis fittings extend 0.6" (1.5 cm).
WEIGHT: 15 lbs. (6.8 kg) Net; 23 lbs. (10.5 kg) Shipping.
About the Brand
Audio Research is one of the oldest continually operating manufacturers in American audio.The company was founded in 1970 in Minneapolis with one goal in mind: to advance the state-of-the-art in music reproduction. Today, Audio Research remains a performance-oriented company by philosophy and design. New product introductions are driven only by genuine advances in technology and performance -- the HIGH DEFINITION that is the hallmark of the company's products. Much more than a mere carriage-trade brand name, the Audio Research marque has come to represent stellar performance and lasting value for music lovers and audio enthusiasts everywhere.
Warranty Information: 3 years on all products, 90 days on tubes
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