Onkyo TX-605 (c. 2005)
The record on the Onkyo TX-605 is a tangle. Nearly every reference to this model - in manuals, classifieds, and forum posts - actually points to the TX-SR605, a 7.1-channel home theater receiver from around 2005. The "TX-605" shorthand shows up in casual listings and user discussions, but no source establishes an official "TX-605" as a distinct product. What follows is what's documented for the TX-SR605, the model these references point to.
It was a solid-state, 7.1-channel AV receiver. Power output is stated as 90 watts per channel into 8 ohms (20-20,000 Hz) at 0.08% THD in multiple sources. At least one manual summary claims "up to 130 watts per channel," likely a different measurement standard. Built-in decoding covered Dolby Digital, DTS, Dolby Pro Logic II, HDCD, and MP3. Later sources also credit it with HDMI audio support and HD decoding formats including Dolby TrueHD and DTS-HD Master Audio. Onkyo's Wide Range Amplifier Technology (WRAT), Audyssey 2EQ room correction, and Optimum Gain Volume Circuitry were part of the package. Dimensions were approximately 435 × 174 × 377 mm, and weight was around 12 kg.
Sound & Vision (2007) placed it in the "mid-price receiver sweet spot." The reviewer found the front panel easy to use, with enough buttons to get the job done without overwhelming the user. The same review praised its balance of flexibility against the compromises of budget units and the confusion of flagship models.
On the used market, listings have appeared at around €40-€109. A Russian classified listing for a unit in excellent condition mentioned the HDMI board had been replaced, apparently a known repair point. Forum users report running the TX-605 with Revel M8/C10 speakers. One described trouble getting the center and surround channels to output sound from DVD inputs, which was a setup issue rather than a documented defect.
Known Specs
- 7.1-channel solid-state AV receiver
- 90W × 7 into 8Ω (20–20,000 Hz) at 0.08% THD
- Decoders: Dolby Digital, DTS, Dolby Pro Logic II, HDCD, MP3
- Four HDMI inputs
- FM/MW tuner
- Frequency response: 5 Hz–100 kHz
- Damping factor: 60
- Dimensions: 435 × 174 × 377 mm; 12 kg
Some things are unknown: original MSRP, production years for the TX-605 as a distinct badge, S/N ratio, phono stage specs, and any official confirmation that "TX-605" and "TX-SR605" were ever formally the same product.
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