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This is the legendary powerhouse of the home theater world: the Onkyo TX-NR905. This unit is in Mint Condition, meticulously cared for in a smoke-free environment.The original remote and setup mic are included. This is the exact factory-matched Odyssey setup mic required for the MultEQ XT 8-point room calibration system. For the serious audiophile, this specific model is highly coveted because it was Made in Japan—representing the peak of Onkyo’s build quality and engineering before production shifted overseas.I am the original owner and have 2 of these available, both mint condition, and can lower the price a bit if you purchase both of them. Performance Highlights:- High-Current Power: Massive toroidal transformer delivering 140 watts per channel (8 ohms). It has the headroom to drive even the most demanding tower speakers with ease.- THX Ultra2 Certified: Ensures cinema-reference sound levels and low distortion.- Audiophile DACs: Equipped with premium Burr-Brown 192 kHz/24-bit DACs for all channels.- HQV Reon-VX Scaling: Includes the high-end Reon-VX video processing chip for world-class 1080p upscaling.Condition:The faceplate, chassis, and terminals are in pristine condition. All functions, including the motorized door and display, work perfectly.Included:- Original Onkyo Remote Control- Power Cable- Original Audyssey Setup Microphone (Essential for calibrating the Room EQ to your specific space)This receiver is built like a tank and sounds like one of the best integrated amps ever made. Whether you are using it for a dedicated 7.1 theater or as a high-fidelity stereo preamp, the NR905 remains a benchmark of performance.Technical Specifications (from Onkyo):Build & Engineering- Made in Japan.- Power Supply: Massive High-Current Power Supply (H.C.P.S.) with a heavy-duty toroidal transformer and two separate transformers for audio/video processing.- Chassis: Independent block construction to isolate the amp and preprocessor, featuring an absolute ground plate to minimize noise. Audio Performance- Power Output: 140 Watts per channel (8 ohms, 20Hz–20kHz, 0.05% THD)- Dynamic Power: Up to 400W into 3 ohms (1 ch)- DACs: Premium Burr-Brown 192 kH /24-bit DACs (PCM1796) for all channels, offering a 123 dB dynamic range- Surround Formats: THX Ultra2 Certified; supports Dolby TrueHD, DTS-HD Master Audio, and Neural-THX Surround.- Frequency Response: 5Hz–100kHz (+1 dB, -3 dB) in Direct mode.- S/N Ratio: 110 dB (Line, IHF-A). Video Processing- Upscaling: Silicon Optix Reon-VX HQV processor for 1080p upscaling of all analog and digital sources.- HDMI: Version 1.3a with Deep Color support and 1080p pass-through. Connectivity- HDMI: 4 inputs / 2 outputs.- Audio I/O: 9 analog inputs (including Phono), 3 optical inputs, 3 coaxial inputs, and a 7.1 multichannel preamp output/input.- Network: Ethernet port for internet radio and streaming music from a PC.- Zone Support: Powered Zone 2 and Zone 3 capability.Available for local pickup in Southern California.
The Onkyo A-7 is a solid 1970s integrated amp with genuine staying power—68 watts per channel, clean preamp stage, and phono inputs make it genuinely useful. Used examples typically trade between USD $300–$450 depending on condition, with fully serviced units commanding the higher end. At USD $550, this is asking a modest premium, likely justified only if it's been professionally recapped and tested across all functions. For reference, comparable serviced examples on Reverb have sold in the USD $575 range, so this sits just below market for a restored piece.
Before committing, verify the seller has actually powered it up and confirmed all inputs work—phono, line, tuner if applicable. Potentiometers (volume, tone controls) often develop scratching or channel imbalance after 45+ years; that's fixable but worth knowing upfront. Ask if capacitors have been replaced; original electrolytic caps from 1976–1979 are likely fatigued by now, and a full recap is the difference between a amp that sounds lively and one that sounds flat or develops hum. Get specifics on what "serviced" actually means here.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Onkyo traces its roots to postwar Japan, founded in 1946 in Osaka by Takeshi Goda, an engineer at Matsushita Electric who envisioned high-quality Japanese loudspeakers. Initially established as Osaka Denki Onkyo K.K., the company began production in 1948 with the acclaimed ED-100 speaker featuring a 25 cm driver, quickly building a reputation through LP concerts and innovative designs that resonated with audiophiles.
The brand excels in premium home audio, renowned for AV receivers, hi-fi amplifiers, and surround sound speakers that deliver exceptional clarity and power. Its portfolio spans turntables, DACs, headphones, and cables, bolstered by acquisitions like Pioneer's home electronics division in 2015, enabling cutting-edge integrations such as internet radio and high-resolution streaming.
Onkyo holds a solid mid-tier position in the hi-fi market, prized by discerning buyers for reliable performance and value rather than ultra-high-end exotica. Despite bankruptcy challenges in the late 2010s, its revival under new ownership preserves a legacy of technological innovation and pure sound enjoyment, appealing to both vintage enthusiasts and modern home cinema setups.
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